devng / twig-persist Goto Github PK

In case all entities should be cleared by their Class the KeyCache remains 
filled. This might lead to some strange effects.

All un-iniitialized primitive types can't be converted to default values.
Twig is attempting to set null to boolean and int and is failing with an 
IllegalStateExcaption. 

See the attached test case.

thanks in advance!
Harsh

Currently the domain persistence annotations are allowed only on fields access 
level. For example:
class Band
{
  Set<Musician> members;
  @Child Album[] albums;  // include the Bands Key in the Key of each Album 
}

It is quite nice feature to have possibility to define annotations on methods 
access level, like:

class Band
{
  private Album[] albums;

  @Child 
  public Album[] getAlbums() {
      return albums;
  }
}

This approach is very important for the case you have splitted your domain 
model into 2 levels - plain objects (DTOs) and domain specific implementation, 
for example:

class BandDTO
{
  private Album[] albums;

  public Album[] getAlbums() {
      return albums;
  }
}

class Band
{
  @Child 
  public Album[] getAlbums() {
      return super.getAlbums();  
  }
}

This coding style is common in large and scalable applications and it will be 
nice to support that also with twig-persists. (also for example when DTO object 
is imported from third party library and you cannot change it - or simply don't 
want)

Due to Datastore API changes from 1.3.1 und 1.3.2 the class
AsyncPreparedQuery does not compile. The constructor of
QueryResultsSourceImpl now needs an ApiProxy.ApiConfig instance.

Providing null is a (dirty?) quick fix, that let all tests work in the
local environment.

There must be a static reference (or look up mechanism) to the current
ApiConfig.

I am trying to perform a query such as this:

Set<String> mySet = new HashSet<String>();
// ... populate the set with some values
Iterator<MyModel> iter = 
datastore.find().type(MyModel.class).addFilter("myField", FilterOperator.IN, 
mySet).now();

The above, generates the below exception. This worked in the tagged version of 
Twig 2.0. It no longer works in the trunk. Fortunately, I am able to get around 
this by using google collections to transform my Set into a List, but I have 
this kind of code throughout my app since I typically prefer Sets when 
filtering by a collection of values.

java.lang.ClassCastException: java.util.HashSet cannot be cast to java.util.List
        at com.google.code.twig.standard.RelationTranslator$1.get(RelationTranslator.java:130)
        at com.google.code.twig.standard.RelationTranslator$1.get(RelationTranslator.java:125)
        at com.google.code.twig.standard.StandardCommonFindCommand.addFilter(StandardCommonFindCommand.java:118)

What steps will reproduce the problem?
1. hg clone https://twig-persist.googlecode.com/hg/ twig-persist
2. mvn package
3. fail.

What is the expected output? What do you see instead?



Downloading:
http://mvn.twig-persist.googlecode.com/hg/com/google/appengine/appengine-testing
/1.3.4/appengine-testing-1.3.4.jar
[INFO] Unable to find resource
'com.google.appengine:appengine-testing:jar:1.3.4' in repository twig
(http://mvn.twig-persist.googlecode.com/hg)
Downloading:
http://google-maven-repository.googlecode.com/svn/repository/com/google/appengin
e/appengine-testing/1.3.4/appengine-testing-1.3.4.jar
[INFO] Unable to find resource
'com.google.appengine:appengine-testing:jar:1.3.4' in repository
google-maven-repository
(http://google-maven-repository.googlecode.com/svn/repository)
Downloading:
http://repo1.maven.org/maven2/com/google/appengine/appengine-testing/1.3.4/appen
gine-testing-1.3.4.jar
[INFO] Unable to find resource
'com.google.appengine:appengine-testing:jar:1.3.4' in repository central
(http://repo1.maven.org/maven2)
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Failed to resolve artifact.

Missing:
----------
1) com.google.appengine:appengine-testing:jar:1.3.4

  Try downloading the file manually from the project website.

  Then, install it using the command: 
      mvn install:install-file -DgroupId=com.google.appengine
-DartifactId=appengine-testing -Dversion=1.3.4 -Dpackaging=jar
-Dfile=/path/to/file

  Alternatively, if you host your own repository you can deploy the file
there: 
      mvn deploy:deploy-file -DgroupId=com.google.appengine
-DartifactId=appengine-testing -Dversion=1.3.4 -Dpackaging=jar
-Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]

  Path to dependency: 
    1) com.vercer.engine.persist:twig-persist:jar:1.0.2
    2) com.google.appengine:appengine-testing:jar:1.3.4

----------
1 required artifact is missing.

for artifact: 
  com.vercer.engine.persist:twig-persist:jar:1.0.2

from the specified remote repositories:
  central (http://repo1.maven.org/maven2),
  twig (http://mvn.twig-persist.googlecode.com/hg),
  google-maven-repository
(http://google-maven-repository.googlecode.com/svn/repository)

[INFO] ------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7 minutes 38 seconds
[INFO] Finished at: Wed Jun 02 13:47:48 CEST 2010
[INFO] Final Memory: 25M/119M
[INFO] ------------------------------------------------------------------------



What version of the product are you using? On what operating system?
 the latest from the repository.

Please provide any additional information below.

I'm using NB 6.8 and I can't download javadoc or sources for twig-persist 
using "download missing dependencies".

See http://groups.google.com/group/twig-
persist/browse_thread/thread/46431ad612b12ec7# - m:n relations may fail 
loading instances that hold references in HashSets.

See test case for sample scenario.

@Test
public void testOr() {
    ds.storeAll(getUserEntities());
        RootFindCommand<UserEntity> root = ds.find().type(UserEntity.class);

        BranchFindCommand branch = root.branch(MergeOperator.OR);
        branch.addChildCommand().addFilter("firstName", FilterOperator.EQUAL, "a");
        branch.addChildCommand().addFilter("lastName", FilterOperator.EQUAL, "b");

        assertEquals(4, (int) root.returnCount().now()); // IllegalStateException: Too many queries
        assertEquals(4, Iterators.size(root.now())); // works fine
}

java.lang.IllegalStateException: Too many queries
    at com.google.code.twig.standard.StandardRootFindCommand$2.now(StandardRootFindCommand.java:234)
    at com.google.code.twig.standard.StandardRootFindCommand$2.now(StandardRootFindCommand.java:227)
    at fi.turkuamk.examples.tests.LocalDatastoreTest.testOr(LocalDatastoreTest.java:111)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

That should add to 2.0 features.

Now, Twig may support to update 1 Existing Instance.

We need somethings like:

Collection<Band> bands = createAllBands();
datastore.associateAll(bands);
datastore.updateAll(bands);

Thanks in advance.
Hung

What steps will reproduce the problem?
1. the find command with the fetchNoFields() option
2. the entity has a @Embed(polymorphic=true) field.

What is the expected output? What do you see instead?
the expected are the IDs of the entities, instead we get:
2010-04-07 14:41:45,808 [ERROR] test Presenter create
testnet.customware.gwt.dispatch.shared.ActionException: Problem translating
field private com.project.shared.entity.Vehicle
com.project.shared.entity.Driver.vehicle

What version of the product are you using? On what operating system?
1.0 MacOs

Please provide any additional information below.

Branch 2.0

Storing a new instance without an @Id and then updating that instance in the 
same ObjectDatastore creates two Entities.

Sometimes, I need to mark a field as transient to avoid them from be
serialized over Gwt RPC. However, I still want to persist the field to db.
I find that AnnotationStrategy tried to check for @Store annotation before
relying on transient property to persist the field. However,
StrategyObjectDatastore always ignore transient field. This is, some how,
inconsistent.

What steps will reproduce the problem?
1. hg clone https://twig-persist.googlecode.com/hg/ twig-persist
2. cd twig-persist
3. mvn package

What is the expected output? What do you see instead?

Expected
  Package is built and a jar is produced.

Instead
  Missing artifact 'com.google.appengine:appengine-testing-1.3.1'

What version of the product are you using? On what operating system?

maven 2.2.1 / Ubuntu 9.10

Please provide any additional information below.

Workaround:

mvn install:install-file -Dfile=/path/to/appengine-sdk/lib/testing/appengine-
testing.jar -DgroupId=com.google.appengine -DartifactId=appengine-testing -
Dversion=1.3.1 -Dpackaging=jar -DgeneratePom=true

NPE occurs when invoking datastore.delete over an entity that is not
associated to the session.


Here's the stack:
Caused by: java.lang.NullPointerException
    at
com.google.appengine.api.datastore.DatastoreServiceImpl$3.run(DatastoreServiceIm
pl.java:229)
    at
com.google.appengine.api.datastore.TransactionRunner.runInTransaction(Transactio
nRunner.java:30)
    at
com.google.appengine.api.datastore.DatastoreServiceImpl.delete(DatastoreServiceI
mpl.java:221)
    at
com.google.appengine.api.datastore.DatastoreServiceImpl.delete(DatastoreServiceI
mpl.java:207)
    at
com.vercer.engine.persist.standard.AbstractStatelessObjectDatastore.deleteKeys(A
bstractStatelessObjectDatastore.java:378)
    at
com.vercer.engine.persist.standard.StrategyObjectDatastore.delete(StrategyObject
Datastore.java:585)

What steps will reproduce the problem?
1. Create a Model: 
class Model { 
  @Key private Long key; 
  private List<ChildModel> list;
}

2.
assign list to [new ChildModel(), null]
3.
persist Model
What is the expected output? 
Model should be persisted fine
What do you see instead?
Exception thrown:
Caused by: java.util.NoSuchElementException
    at java.util.HashMap$HashIterator.nextEntry(HashMap.java:796)
    at java.util.HashMap$KeyIterator.next(HashMap.java:828)
    at
com.vercer.engine.persist.util.PropertySets.firstValue(PropertySets.java:21)
    at
com.vercer.engine.persist.standard.IndependantEntityTranslator.propertiesToTypes
afe(IndependantEntityTranslator.java:31)
    at
com.vercer.engine.persist.translator.ListTranslator.propertiesToTypesafe(ListTra
nslator.java:117)
    at
com.vercer.engine.persist.translator.ChainedTranslator.propertiesToTypesafe(Chai
nedTranslator.java:62)
    at
com.vercer.engine.persist.translator.ObjectFieldTranslator.activate(ObjectFieldT
ranslator.java:107)

What version of the product are you using? On what operating system?


Please provide any additional information below.

The following simple test block fails:

Future<QueryResultIterator<DummyModel>> futureResult = 
datastore.find().type(DummyModel.class).later();
QueryResultIterator<DummyModel> iter = futureResult.get();

The following exception is generated:

java.lang.NoSuchMethodError: 
com.google.appengine.api.datastore.QueryResultsSourceImpl.<init>(Lcom/google/app
hosting/api/ApiProxy$ApiConfig;Lcom/google/appengine/api/datastore/FetchOptions;
Lcom/google/appengine/api/datastore/Transaction;)V
        at com.google.appengine.api.datastore.AsyncPreparedQuery$2.adapt(AsyncPreparedQuery.java:68)
        at com.google.appengine.api.datastore.AsyncPreparedQuery$2.adapt(AsyncPreparedQuery.java:59)
        at com.google.code.twig.util.FutureAdaptor.get(FutureAdaptor.java:38)
        at com.google.code.twig.standard.StandardRootFindCommand$1.get(StandardRootFindCommand.java:197)
        at com.google.code.twig.standard.StandardRootFindCommand$1.get(StandardRootFindCommand.java:186)
        at com.schedgy.data.TwigApiTest.testFutureQuery(TwigApiTest.java:27)

I am seeing this on GAE 1.3.8 with the Twig 2.0 beta jar from the maven repo.

import com.google.code.twig.util.generic.GenericTypeReflector;

public class CoreConverters
{
        public static void registerAll(CombinedConverter converter)
        {
                converter.append(new DateToString());
                converter.append(new StringToDate());
                converter.append(new ClassToString());
                converter.append(new StringToClass());
                converter.append(new UrltoString());
                converter.append(new StringToURI()); -- bug
                converter.append(new URItoString());
                converter.append(new StringToURI());
                converter.append(new LocaleToString());
                converter.append(new StringToLocale());
                converter.append(new CurrencyToString());
                converter.append(new StringToCurrency());
        }


Also as naming convention/consistency why not ToUri or ToURL??

The SimpleDateFormat in createFestival() must use Locale.ENGLISH -
otherwise the parsing of all date strings fails iff the default locale is
not english.

Patch attached.

What steps will reproduce the problem?

1.  Create a generic class : 
public class Generic<T>  {
   @Embed(polymorphic=true) private T genericObject;
    public ODSC() {
    }
    public ODSC(T genericObject) {
        this.genericObject = genericObject;
    }
    public void setObject(T genericObject) {
    this.genericObject = genericObject;
    }
    public T getObject() {
        return this.genericObject;
    }
}




2. Try to store an instance of this object   
ObjectDatastore datastore = new AnnotationObjectDatastore();
Generic <String> gen = new Generic <String>("foo");
datastore.store(container);




3. I get the following error :
java.lang.RuntimeException: not implemented: class 
sun.reflect.generics.reflectiveObjects.TypeVariableImpl
    at com.vercer.engine.persist.util.generic.GenericTypeReflector.isSuperType(GenericTypeReflector.java:304)
    at com.vercer.engine.persist.conversion.DefaultTypeConverter.isSuperType(DefaultTypeConverter.java:75)
    at com.vercer.engine.persist.conversion.DefaultTypeConverter.convert(DefaultTypeConverter.java:48)
    at com.vercer.engine.persist.translator.ObjectFieldTranslator.typesafeToProperties(ObjectFieldTranslator.java:235)
    at com.vercer.engine.persist.standard.AbstractStatelessObjectDatastore.instanceToEntity(AbstractStatelessObjectDatastore.java:74)
    at com.vercer.engine.persist.standard.AbstractStatelessObjectDatastore.store(AbstractStatelessObjectDatastore.java:62)
    at com.vercer.engine.persist.standard.AbstractStatelessObjectDatastore.store(AbstractStatelessObjectDatastore.java:158)
    at mytest.server.test.doPost(test.java:61)


What is the expected output? What do you see instead?
I would like to store my generic classe

What version of the product are you using? On what operating system?
I'm using twig-persist 1.0.1 on OSX


Please provide any additional information below.
GenericTypeReflector.java Line 304, I think, it misses something


Thank you in advance for solving this bug
Emmanuel

    Hello, 
I have a problem problem to load many object with children : It takes 
a very long time 
For exemple, when I use the datastore to load 100 instance of my class 
Album, on my debug local server, it takes 0.5 seconds, but on app 
engine, it takes more than 5 seconds. 
Is it normal ? 
I think that twig makes a request on the datastore on each 
"albums.next();". 
Is there a way to load all in a single request ? 
I have tested it using JDO and it takes 0.1 second. 
Thank you in advance for your help. 
// The class : 
public class Album { 
    @Key Long ID; 
    String _title; 
    @Child Price _price; 
} 

    public class Price { 
    String _value; 
    String _tva; 
} 

The code used to load 100 instances 
 Iterator<Album> albums = datastore.find(Album.class); 
while (albums.hasNext()) 
{ 
    Album a = albums.next(); 

- Masquer le texte des messages précédents -
} 

I need to be able to load multiple entities by providing a list of keys. I
tried with find command, but using IN operator and a given set produce this
query: Select * from Entity where key in [1,2,3,4,5] doesn't look like a
correct query (since the key is in Key format, not Long format).

I've seen that you said you had planned to add it to twig (during a debate
with Jeff), just submit an issue so you can notice it.

Have one Parent object and ParentSearchIndex object.
when saving an parent object in database I call this methods:

Parent parent = ... given as argument...
dataStore.store(parent);
ParentSearchIndex searchIndex = indexCreator.createIndex(parent);
dataStore.store(searchIndex, parent);

I try to search in parents like this.

Iterator<Parent> parents = dataStore.find()
            .type(ParentsSearchIndex.class)   // search for the index
            .addFilter("index", Query.FilterOperator.EQUAL, searchQuery.toLowerCase())
            .addSort("state", Query.SortDirection.ASCENDING)
            .addFilter("state", Query.FilterOperator.LESS_THAN, ParentState.ALIVE.getValue())
            .startFrom(0)
            .maximumResults(10)
            .returnParentsNow();  // query for parents keys only and fetch instances

Expected results is to get 10 parents on ParentSearchIndex object but twig 
persist throw NullPointerException.

StandardTypedFindCommand line 144
fetchOptions is null

stack trace:

Caused by: java.lang.NullPointerException
    at com.vercer.engine.persist.standard.StandardTypedFindCommand.childEntitiesToParentEntities(StandardTypedFindCommand.java:144)
    at com.vercer.engine.persist.standard.StandardSingleParentsCommand.returnParentsNow(StandardSingleParentsCommand.java:19)
    at com.vercer.engine.persist.standard.StandardTypedFindCommand.returnParentsNow(StandardTypedFindCommand.java:133)

I using version 1.0.3

If I dont use .startFrom or maximumResults works fine...

I am trying to define a simple parent/child relationship. The child class will 
not define its Parent because the Parent could be one of many kinds. When I 
annotate the ChildModel in the ParentModel with @Child, I get an exception 
complaining about the Key being incomplete. I found that by specifying a the 
value of the field @Id with some value, this exception goes away and my test 
passes.

The reason I am opening this as a bug, is because I do not (should not) want to 
specify the key manually. This behavior is also inconsistent with GAE JDO 
behavior. When I was using JDO, I was able to have the @Id managed by the 
datastore.

This is using the Twig 2.0-beta3 jar and GAE 1.3.8

public class ParentModel {
        // I dont want to have to specify this
        //@Id
        //protected Long dummyId;

    protected String dummyProperty1;

    @Child
    protected ChildModel child = new ChildModel();
}

public class ChildModel {

    protected String dummyProperty1;
}

// Failing test:
ParentModel p = new ParentModel();
datastore.store().instance(p).now();

Stacktrace:
java.lang.IllegalStateException: Key specification is incomplete.  You may need 
to define an id for instance with kind com_schedgy_data_ParentModel
        at com.google.code.twig.standard.KeySpecification.toKey(KeySpecification.java:90)
        at com.google.code.twig.standard.ChildRelationTranslator.getParentKey(ChildRelationTranslator.java:19)
        at com.google.code.twig.standard.RelationTranslator.instanceToKey(RelationTranslator.java:164)
        at com.google.code.twig.standard.RelationTranslator$2.get(RelationTranslator.java:151)
        at com.google.code.twig.standard.RelationTranslator$2.get(RelationTranslator.java:148)
        at com.google.code.twig.standard.StandardEncodeCommand.dereferencePropertyValue(StandardEncodeCommand.java:58)
        at com.google.code.twig.standard.StandardEncodeCommand.transferProperties(StandardEncodeCommand.java:41)
        at com.google.code.twig.standard.StandardCommonStoreCommand.instanceToEntity(StandardCommonStoreCommand.java:252)
        at com.google.code.twig.standard.StandardSingleStoreCommand.now(StandardSingleStoreCommand.java:51)
        at com.google.code.twig.standard.StandardSingleStoreCommand.now(StandardSingleStoreCommand.java:13)
        at com.schedgy.data.TwigApiTest.testStoreParentChild(TwigApiTest.java:43)

What steps will reproduce the problem?
1. add member @Embed private ShortBlob blob;
2. store

What is the expected output? 
Since a core type should be embedded anyway one would not expect any
problem with this setting.

What do you see instead?
java.lang.IllegalStateException: Cannot convert [B@129c051 to
com.vercer.engine.persist.strategy.DefaultFieldStrategy$1@1d56e03

What version of the product are you using?
Twig 1.0

If this behavior is desired the exception should be more detailed. It took
me some time to find out what was going on.

Fresh check out (revision 22) from the Mercurial repository is missing
Google Collections dependency, which makes my build fail.

Patch inserting the missing dependency and the repository for it attached.

Empty collection instances are not stored and therefore returned as null.  Need 
to differentiate 
between a null value, an empty collection and a collection containing null.

For primitive type boolean and numbers default value are assigned, but char 
is not handled and hence an exception is thrown:

IllegalStateException("Unkonwn primitive default" + char).

char by convention takes a Character.MIN_VALUE as default. I added 2 lines 
to the PrimitiveConverter to fix it:

line 56:
else if (Character.class == wrapper)
{
 source = Character.MIN_VALUE;
}

If you accept this fix, can you please add it to the main twig branch 
please? Also look at my another fix in Issue 25.

The ListTranslator has dependency on Google Guice that could be avoided using 
Google Collections: see line 57: Lists.newArrayList()

tero-nurminens-imac-2:twig-persist tero$ mvn clean install
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building Unnamed - com.google.code.twig:twig-persist:jar:2.0-beta3
[INFO]    task-segment: [clean, install]
[INFO] ------------------------------------------------------------------------
[INFO] [clean:clean {execution: default-clean}]
[INFO] Deleting directory /Users/tero/t/twig/twig-persist/target
[INFO] [build-helper:add-source {execution: add-source}]
[INFO] Source directory: /Users/tero/t/twig/twig-persist/src/shared added.
[INFO] [resources:resources {execution: default-resources}]
[WARNING] Using platform encoding (MacRoman actually) to copy filtered 
resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory 
/Users/tero/t/twig/twig-persist/src/main/resources
Downloading: 
http://mvn.twig-persist.googlecode.com/hg/com/google/appengine/appengine-api/1.3
.8/appengine-api-1.3.8.pom
[INFO] Unable to find resource 'com.google.appengine:appengine-api:pom:1.3.8' 
in repository twig (http://mvn.twig-persist.googlecode.com/hg)
Downloading: 
http://repo1.maven.org/maven2/com/google/appengine/appengine-api/1.3.8/appengine
-api-1.3.8.pom
[INFO] Unable to find resource 'com.google.appengine:appengine-api:pom:1.3.8' 
in repository central (http://repo1.maven.org/maven2)
[INFO] [compiler:compile {execution: default-compile}]
[INFO] Compiling 126 source files to 
/Users/tero/t/twig/twig-persist/target/classes
[INFO] [resources:testResources {execution: default-testResources}]
[WARNING] Using platform encoding (MacRoman actually) to copy filtered 
resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory 
/Users/tero/t/twig/twig-persist/src/test/resources
Downloading: 
http://mvn.twig-persist.googlecode.com/hg/com/google/appengine/appengine-api/1.3
.8/appengine-api-1.3.8.jar
[INFO] Unable to find resource 'com.google.appengine:appengine-api:jar:1.3.8' 
in repository twig (http://mvn.twig-persist.googlecode.com/hg)
Downloading: 
http://repo1.maven.org/maven2/com/google/appengine/appengine-api/1.3.8/appengine
-api-1.3.8.jar
[INFO] Unable to find resource 'com.google.appengine:appengine-api:jar:1.3.8' 
in repository central (http://repo1.maven.org/maven2)
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Failed to resolve artifact.

Missing:
----------
1) com.google.appengine:appengine-api:jar:1.3.8

  Try downloading the file manually from the project website.

  Then, install it using the command: 
      mvn install:install-file -DgroupId=com.google.appengine -DartifactId=appengine-api -Dversion=1.3.8 -Dpackaging=jar -Dfile=/path/to/file

  Alternatively, if you host your own repository you can deploy the file there: 
      mvn deploy:deploy-file -DgroupId=com.google.appengine -DartifactId=appengine-api -Dversion=1.3.8 -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]

  Path to dependency: 
    1) com.google.code.twig:twig-persist:jar:2.0-beta3
    2) com.google.appengine:appengine-api:jar:1.3.8

----------
1 required artifact is missing.

for artifact: 
  com.google.code.twig:twig-persist:jar:2.0-beta3

from the specified remote repositories:
  central (http://repo1.maven.org/maven2),
  twig (http://mvn.twig-persist.googlecode.com/hg)



[INFO] ------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 13 seconds
[INFO] Finished at: Thu Nov 11 16:16:11 EET 2010
[INFO] Final Memory: 25M/81M
[INFO] ------------------------------------------------------------------------

what about using the standard svn structure with trunk, branches, tags. Then 
you could tag releases. It think it would seem odd to a developer assessing the 
product that this structure doesn't exist.

I am getting a NPE from the StandardDecodeCommand when doing a bulk load by ID:

Set<Long> ids = new HashSet<Long>();
for (int i = 0; i < 100; i++) {
ids.put(datastore.store().instance(new DummyModel()).now().getId());
}

Map<Long, DummyModel> results = datastore.loadAll(DumyModel.class, ids);

Instead of getting a Map with 100 values, I get the below NPE. Looking at the 
source of the class, it looks like this is when no Keys are loaded. The 
variable 'missing' will remain null if the given Keys collection is empty.

java.lang.NullPointerException
        at com.google.code.twig.standard.StandardDecodeCommand.keysToInstances(StandardDecodeCommand.java:156)
        at com.google.code.twig.standard.StandardMultipleTypedLoadCommand.now(StandardMultipleTypedLoadCommand.java:43)
        at com.google.code.twig.standard.TranslatorObjectDatastore.loadAll(TranslatorObjectDatastore.java:208)
        at com.schedgy.core.dao.BaseDao.findByIds(BaseDao.java:115)


This is with GAE 1.3.8 and the Twig 2.0 beta from the MVN repo.

version : twig-persist-2.0-beta.jar

see my questions at the end.

package com.rvanker.client;

import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
import com.rvanker.client.action.Action;
import com.rvanker.client.action.Response;
import com.rvanker.domain.Ca;
import com.rvanker.domain.Pf;

@RemoteServiceRelativePath("investments")
public interface InvestmentsService extends RemoteService {
    Ca storeCa(Ca ca) throws IllegalArgumentException;
    Ca getCaByName(String s);
    void addPfToCa (Ca ca, Pf pf);
    void addPfToCaWithAssociate (Ca ca, Pf pf);
    void deletePfFromCa(Ca ca, Pf pf);
}

--------------------------------------------------------------------------------
---------------------
package com.rvanker.client;

import com.google.gwt.user.client.rpc.AsyncCallback;
import com.rvanker.client.action.Action;
import com.rvanker.client.action.Response;
import com.rvanker.domain.Ca;
import com.rvanker.domain.Pf;

public interface InvestmentsServiceAsync {
    void storeCa(Ca ca,AsyncCallback<Ca> callback) throws IllegalArgumentException;
    void getCaByName(String s,AsyncCallback callback);
    void addPfToCa (Ca ca, Pf pf, AsyncCallback callback);
    void addPfToCaWithAssociate (Ca ca, Pf pf, AsyncCallback callback);
    void deletePfFromCa(Ca ca, Pf pf,AsyncCallback callback);
}

--------------------------------------------------------------------------------
---------------------
public class InvestmentsServiceImpl extends RemoteServiceServlet implements 
InvestmentsService{

    @Override
    public Ca storeCa(Ca ca) {
        // create the datastore instance directly - allows sub-classing 
        ObjectDatastore datastore = new AnnotationObjectDatastore();
        Key k = datastore.store(ca);

        return ca;

    }
    @Override
    public Ca getCaByName(String s) {
        ObjectDatastore datastore = new AnnotationObjectDatastore();
        Ca x = datastore.load(Ca.class,s);
        return x;
    }


    @Override
    public void deletePfFromCa(Ca ca1, Pf pf) {
        ObjectDatastore datastore = new AnnotationObjectDatastore();
        Ca ca = datastore.load(Ca.class,ca1.getName());
        List<Pf> tmp = ca1.getPfs(); 
        System.out.println ( " Before tmp.size " + tmp.size());
        boolean x = tmp.remove(pf);

        ca.setPfs(tmp);

        System.out.println ( " delete result " + x + " tmp.size " + tmp.size());
        datastore.update(ca);

    }


    @Override
    public void addPfToCaWithAssociate(Ca ca1, Pf pf) {
        ObjectDatastore datastore = new AnnotationObjectDatastore();
        datastore.associate(ca1);
        List<Pf> tmp = ca1.getPfs(); 
        System.out.println (" addPfToCaWithAssociate : Before tmp.size " + tmp.size());
        tmp.add(pf);
        ca1.setPfs(tmp);
        System.out.println (" addPfToCaWithAssociate : After tmp.size " + tmp.size());
        datastore.update(ca1);

    }
    @Override
    public void addPfToCa(Ca ca1, Pf pf) {
        ObjectDatastore datastore = new AnnotationObjectDatastore();
        Ca ca = datastore.load(Ca.class,ca1.getName());
        ca.getPfs().add(pf);
        datastore.update(ca);
    }
}

--------------------------------------------------------------------------------
---------------------
package com.rvanker.domain;

import java.io.Serializable;
import java.util.List;

import com.google.code.twig.annotation.Activate;
import com.google.code.twig.annotation.Child;
import com.google.code.twig.annotation.Key;

public class Ca implements Serializable {
    @Key 
    String name; 
    @Activate(1) @Child List<Pf> pfs;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public List<Pf> getPfs() {
        return pfs;
    }
    public void setPfs(List<Pf> pfs) {
        this.pfs = pfs;
    }  
}
--------------------------------------------------------------------------------
---------------------
package com.rvanker.domain;

import java.io.Serializable;

public class Pf  implements Serializable {
    String name;
    int volgorde;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getVolgorde() {
        return volgorde;
    }
    public void setVolgorde(int volgorde) {
        this.volgorde = volgorde;
    }
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        result = prime * result + volgorde;
        return result;
    }
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Pf other = (Pf) obj;
        if (name == null) {
            if (other.name != null)
                return false;
        } else if (!name.equals(other.name))
            return false;
        if (volgorde != other.volgorde)
            return false;
        return true;
    }



}
--------------------------------------------------------------------------------
---------------------

package com.rvanker.client;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import 
com.google.appengine.tools.development.testing.LocalDatastoreServiceTestConfig;
import com.google.appengine.tools.development.testing.LocalServiceTestHelper;
import com.rvanker.domain.Ca;
import com.rvanker.domain.Pf;
import com.rvanker.server.InvestmentsServiceImpl;

public class TwigTest {
       private final LocalServiceTestHelper helper =
            new LocalServiceTestHelper(new LocalDatastoreServiceTestConfig());

        @Before
        public void setUp() {
            helper.setUp();
        }

        @After
        public void tearDown() {
            helper.tearDown();
        }

    @Test
    public void testNormal() {

        InvestmentsService service = new InvestmentsServiceImpl();

        Ca c = new Ca();
        String key = "twigtest" + new Date().toString();
        c.setName(key);
        List<Pf> x = new  ArrayList<Pf>();
        Pf pf1 = new Pf();
        pf1.setName("Apf1 " + new Date().toString());

        Pf pf2 = new Pf();
        pf2.setName("Apf2 " + new Date().toString());

        x.add(pf1);
        x.add(pf2);
        c.setPfs(x);
        Ca result = service.storeCa(c);
        System.out.println ("terug : " + result.getName());

        Assert.assertEquals(key,result.getName());

        Ca read = service.getCaByName(key);
        Assert.assertEquals(key,read.getName());
        Assert.assertEquals(2,read.getPfs().size());

        Pf pf3 = new Pf();
        pf3.setName("Apf3 " + new Date().toString());

        service.addPfToCa(read, pf3);


        Ca read2 = service.getCaByName(key);
        Assert.assertEquals(key,read2.getName());
        Assert.assertEquals(3,read2.getPfs().size());

        // if you use service.deletePfFromCa(read2, pf2); then it is ok. 
        // "read2" instead of "read", but that should not make a difference !!!
        // please explain ?
        service.deletePfFromCa(read, pf2); 

        Ca read3 = service.getCaByName(key);
        Assert.assertEquals(key,read3.getName());
        Assert.assertEquals(2,read3.getPfs().size());
    }

    @Test
    public void testWithAssociate() {

        InvestmentsService service = new InvestmentsServiceImpl();

        Ca c = new Ca();
        String key = "twigtest" + new Date().toString();
        c.setName(key);
        List<Pf> x = new  ArrayList<Pf>();
        Pf pf1 = new Pf();
        pf1.setName("Apf1 " + new Date().toString());

        Pf pf2 = new Pf();
        pf2.setName("Apf2 " + new Date().toString());

        x.add(pf1);
        x.add(pf2);
        c.setPfs(x);
        Ca result = service.storeCa(c);
        System.out.println ("terug : " + result.getName());

        Assert.assertEquals(key,result.getName());

        Ca read = service.getCaByName(key);
        Assert.assertEquals(key,read.getName());
        Assert.assertEquals(2,read.getPfs().size());

        Pf pf3 = new Pf();
        pf3.setName("Apf3 " + new Date().toString());


        service.addPfToCaWithAssociate(read, pf3);


//      Ca read2 = service.getCaByName(key);
//      Assert.assertEquals(key,read2.getName());
//      Assert.assertEquals(3,read2.getPfs().size());
//      
//      service.deletePfFromCa(read, pf2); 
//      
//      Ca read3 = service.getCaByName(key);
//      Assert.assertEquals(key,read3.getName());
//      Assert.assertEquals(2,read3.getPfs().size());
    }

}

I have 3 questions :
- why is import com.google.code.twig.annotation.Key deprecated ? How to solve 
it.
- testNormal() : see the code : please explain?
- testWithAssociate() : what causes the error below ?

java.lang.IllegalArgumentException: Associating entity does not have complete 
key: <Entity [com_rvanker_domain_Ca("twigtestThu Sep 30 17:00:36 CEST 
2010")/com_rvanker_domain_Pf(no-id-yet)]:
    name = Apf1 Thu Sep 30 17:00:36 CEST 2010
    volgorde = 0
>

    at com.google.code.twig.standard.StandardCommonStoreCommand.entitiesToKeys(StandardCommonStoreCommand.java:317)
    at com.google.code.twig.standard.StandardMultipleStoreCommand.now(StandardMultipleStoreCommand.java:32)
    at com.google.code.twig.standard.RelationTranslator.instancesToKeys(RelationTranslator.java:189)

* Property types (at least Enum) which are translated for storing should also 
be translated when fetching
* Affected version: 2.0-beta3

* TestCase for the issue (using Twig's test models)
@Test
public void testIssue41 {
  // ObjectDatastore ods = ...
  try {
    ods.find().type().
    addFilter("hair", FilterOperator.EQUAL, Band.HairStyle.LONG_LIKE_A_GIRL).
    now(); }
catch(IllegalArgumentException e) {
    fail("Issue41: Enum values not filtered correctly!");
  }
}

------ Stack trace (with same object types) -------

java.lang.IllegalArgumentException: gender: 
fi.turkuamk.examples.tests.LocalDatastoreTest$UserEntity$GenderEnum is not a 
supported property type.
    at com.google.appengine.api.datastore.DataTypeUtils.checkSupportedSingleValue(DataTypeUtils.java:184)
    at com.google.appengine.api.datastore.DataTypeUtils.checkSupportedValue(DataTypeUtils.java:157)
    at com.google.appengine.api.datastore.Query$FilterPredicate.<init>(Query.java:549)
    at com.google.appengine.api.datastore.Query.addFilter(Query.java:235)
    at com.google.code.twig.standard.StandardCommonFindCommand.applyFilters(StandardCommonFindCommand.java:141)
    at com.google.code.twig.standard.StandardRootFindCommand.newQuery(StandardRootFindCommand.java:525)
    at com.google.code.twig.standard.StandardCommonFindCommand.queries(StandardCommonFindCommand.java:112)
    at com.google.code.twig.standard.StandardCommonFindCommand.getValidatedQueries(StandardCommonFindCommand.java:127)
    at com.google.code.twig.standard.StandardRootFindCommand.now(StandardRootFindCommand.java:454)
    at com.google.code.twig.standard.StandardRootFindCommand.now(StandardRootFindCommand.java:30)
    at fi.turkuamk.examples.tests.LocalDatastoreTest.testEnumFilterException(LocalDatastoreTest.java:332)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

http://code.google.com/events/io/2009/sessions/BuildingScalableComplexApps.html

is the new

http://code.google.com/events/io/sessions/BuildingScalableComplexApps.html

What steps will reproduce the problem?
1. Look at 
http://code.google.com/p/twig-persist/wiki/Configuration#Parent-Child_Relationsh
ips
2. Class Band has this line: @Key name;  // the key will contain the band name 
which must be unique

What is the expected output? What do you see instead?
3. Should read @Key String name;

What version of the product are you using? On what operating system?


Please provide any additional information below.

What steps will reproduce the problem?
1. Classes: Element, Content, Photo extends Content, Video extends Content
2. Class A {@Embed (polymorphic = true) Content c; }
3. Create elements with photo content, elements with video content 

What is the expected output? What do you see instead?
elements are well stored in the datastore (dev datastore browser), 
With a simple "get all", some objects are not returned some are returned twice, 
some have worng 
field value.
Strange point: content%24class field is empty 

What version of the product are you using? On what operating system?

Please provide any additional information below.

keyCache.evictInstance(instance); happens twice calling 
StrategyTypeSafeDatastore.deleteAll - once in the loop and once transforming 
the collection.

This is a followup to
http://groups.google.com/group/twig-persist/browse_thread/thread/c3e1...

For me,
datastore.getService().delete(key);
doesn't seem to have any effect. Reading the entity again in a null
variable sets it with data.

datastore.delete(entity);
works as expected.

Here's a test case, wrote blindly as twig2 doesn't compile for me
right now

        public void deleteKeyTest() {
                ObjectDatastore od = new AnnotationObjectDatastore();

                Restaurant restaurant = new Restaurant();
                restaurant.name = "test";
                Key restaurantKey = od.store(restaurant);

                Restaurant restaurant2;
                restaurant2 = od.load(restaurantKey);
                assertTrue("stored entity exists",
                                restaurant.name.equals(restaurant2.name));
                od.getService().delete(restaurantKey);
                restaurant2 = null;
                restaurant2 = od.load(restaurantKey);
                assertTrue("deleted entity exists", null == restaurant2);
        }


Please provide any additional information below.
In addition, would it be possible for twig to offer a "native" delete(Key key) 
implementation?

Even if behind all it does is getService().delete(key), having this
means twig offers full CRUD support. It would also have a unit test on
it, guaranteeing delete works on each release. 

Perhaps a delete() fluent command would be best for all the options.
 Similar to load()

od.delete().key(key).now() 

Unsorted merged queries return duplicate results.

Class A{}
Class B{}
Class C{}

where A is parent of B, B is parent of C, ancestor queries fail to find 
depth=2+ relationship
dumping the keys returned from the datastore shows that B key will be A(1)/B(2) 
but C Key will be B(2)/C(3) where the datastore would operate on the basis of 
querying and allocating keyspace on full length ancestry paths.

ds.find().type(C.class).ancestor( A ) would fail

this orphans twig-persist objects from lowlevel API objects stored using the 
documented sdk parent namespace id allocation features. 

Please follow the thread:
http://groups.google.com/group/twig-
persist/browse_thread/thread/63e1eb8dd5aa0dc3/bcdf8c4c6f3f5f5a#bcdf8c4c6f3f
5f5a

What is the expected output? What do you see instead?
The expected output is a null value, but I get an IllegalStateException: 
path not found exception.

What version of the product are you using? On what operating system?
version 1.0.1

Many existing applications make heavy use of the GAE Key and it would be 
difficult for these applications to switch to Twig since it abstracts away the 
notion of the Key. It would be nice if there was an annotation that we could 
use to mark fields as being the Key objects or String encoded Keys.

The code in 1.0.2 is:

    public RootFindCommand<T> maximumResults(int limit)
    {
        if (this.options == null)
        {
            this.options = FetchOptions.Builder.withLimit(limit);
        }
        else
        {
            this.options.offset(limit);
        }
        return this;
    }

It should be:

    public RootFindCommand<T> maximumResults(int limit)
    {
        if (this.options == null)
        {
            this.options = FetchOptions.Builder.withLimit(limit);
        }
        else
        {
            this.options.limit(limit);
        }
        return this;
    }

This is using the Twig 2.0-beta3 jar and GAE 1.3.8

As explained in group articles use @Child annotation on field in parent class 
then annotation child class with @Entity(allocateIdsBy=50) to automatically 
allocate id and so avoid the 'chicken and egg' problem.

In class: StandardCommonStoreCommand

Line 285 : KeyRange range = datastore.allocatedIdRanges.get(kindAndParent);

Null pointer exception thrown as allocatedIdRanges is not initialized.

Tried quick fix: Assigning the variable to new HashMap allowed application to 
run.

Having my application deployed on AppEngine I get following exception 
loading an entity:

Caused by: java.lang.IllegalAccessError: tried to access method 
com.google.appengine.repackaged.com.google.common.collect.Iterators.forArray
([Ljava/lang/Object;II)Lcom/google/appengine/repackaged/com/google/common/co
llect/UnmodifiableIterator; from class 
com.vercer.util.collections.ArraySortedSet
    at 
com.vercer.util.collections.ArraySortedSet.iterator(ArraySortedSet.java:42)
    at 
com.vercer.engine.persist.util.PropertySets.firstValue(PropertySets.java:20)
    at 
com.vercer.engine.persist.translator.DirectTranslator.propertiesToTypesafe(D
irectTranslator.java:18)
    at 
com.vercer.engine.persist.translator.ChainedTranslator.propertiesToTypesafe(
ChainedTranslator.java:67)
    at 
com.vercer.engine.persist.translator.ListTranslator.propertiesToTypesafe(Lis
tTranslator.java:47)
    at 
com.vercer.engine.persist.translator.ChainedTranslator.propertiesToTypesafe(
ChainedTranslator.java:67)
    at 
com.vercer.engine.persist.translator.ObjectFieldTranslator.activate(ObjectFi
eldTranslator.java:109)
    at 
com.vercer.engine.persist.translator.ObjectFieldTranslator.propertiesToTypes
afe(ObjectFieldTranslator.java:61)
    at 
com.vercer.engine.persist.TranslatorTypesafeDatastore.toTypesafe(TranslatorT
ypesafeDatastore.java:270)
    at 
com.vercer.engine.persist.StrategyTypesafeDatastore.toTypesafe(StrategyTypes
afeDatastore.java:290)
    at 
com.vercer.engine.persist.TranslatorTypesafeDatastore.keyToInstance(Translat
orTypesafeDatastore.java:324)
    at 
com.vercer.engine.persist.StrategyTypesafeDatastore.keyToInstance(StrategyTy
pesafeDatastore.java:310)
    at 
com.vercer.engine.persist.TranslatorTypesafeDatastore.load(TranslatorTypesaf
eDatastore.java:310)

Because multi-valued properties are used to store component collections and 
these may only be one dimensional, the path must be used to differentiate 
the items.

propertyA.propertyA1
propertyA.propertyA2:0
propertyA.propertyA2:1
propertyA.propertyA2:2

What steps will reproduce the problem?
1. A unitialized boolean value in a class

java.lang.IllegalArgumentException: Can not set boolean field 
org.twig.example.isPhysicallyChallenged to null value

boolean fields can't be set to null and hence the ObjectFieldTranslator is 
throwing this error.

There seems to be a problem with the CollectionConverter.
Attached is the failing test case.

I get an IllegalStateException.

See the stack trace:

java.lang.IllegalStateException: Problem translating field private 
com.twig.example.BirthInformation com.twig.example.Person.birthInformation
    at 
com.vercer.engine.persist.translator.ObjectFieldTranslator.activate(ObjectF
ieldTranslator.java:112)
    at 
com.vercer.engine.persist.standard.StrategyObjectDatastore$3.activate(Strat
egyObjectDatastore.java:220)
    at 
com.vercer.engine.persist.translator.ObjectFieldTranslator.propertiesToType
safe(ObjectFieldTranslator.java:57)
    at 
com.vercer.engine.persist.standard.AbstractStatelessObjectDatastore.toTypes
afe(AbstractStatelessObjectDatastore.java:272)
    at 
com.vercer.engine.persist.standard.StrategyObjectDatastore.toTypesafe(Strat
egyObjectDatastore.java:429)
    at 
com.vercer.engine.persist.standard.AbstractStatelessObjectDatastore.keyToIn
stance(AbstractStatelessObjectDatastore.java:310)
    at 
com.vercer.engine.persist.standard.StrategyObjectDatastore.keyToInstance(St
rategyObjectDatastore.java:449)
    at 
com.vercer.engine.persist.standard.AbstractStatelessObjectDatastore.load(Ab
stractStatelessObjectDatastore.java:296)
    at 
com.vercer.engine.persist.standard.AbstractStatelessObjectDatastore.interna
lLoad(AbstractStatelessObjectDatastore.java:232)
    at 
com.vercer.engine.persist.standard.StrategyObjectDatastore.load(StrategyObj
ectDatastore.java:526)
    at 
com.vercer.engine.persist.standard.AbstractStatelessObjectDatastore.load(Ab
stractStatelessObjectDatastore.java:199)
    at com.wulfpak.test.TestPerson.testPerson(TestPerson.java:54)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:3
9)
    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp
l.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at junit.framework.TestCase.runTest(TestCase.java:164)
    at junit.framework.TestCase.runBare(TestCase.java:130)
    at junit.framework.TestResult$1.protect(TestResult.java:106)
    at junit.framework.TestResult.runProtected(TestResult.java:124)
    at junit.framework.TestResult.run(TestResult.java:109)
    at junit.framework.TestCase.run(TestCase.java:120)
    at junit.framework.TestSuite.runTest(TestSuite.java:230)
    at junit.framework.TestSuite.run(TestSuite.java:225)
    at 
org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:8
3)
    at 
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestRe
ference.java:46)
    at 
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:
38)
    at 
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestR
unner.java:467)
    at 
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestR
unner.java:683)
    at 
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner
.java:390)
    at 
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunne
r.java:197)
Caused by: java.lang.IllegalArgumentException: Unsupported Collection type 
java.util.EnumSet<com.twig.example.ProofDocumentTypeCode>. Try declaring 
the interface instead of the concrete collection type.
    at 
com.vercer.engine.persist.conversion.CollectionConverter.convert(Collection
Converter.java:130)
    at 
com.vercer.engine.persist.conversion.CombinedTypeConverter.convert(Combined
TypeConverter.java:37)
    at 
com.vercer.engine.persist.conversion.DefaultTypeConverter.convert(DefaultTy
peConverter.java:56)
    at 
com.vercer.engine.persist.translator.ObjectFieldTranslator.activate(ObjectF
ieldTranslator.java:128)
    at 
com.vercer.engine.persist.standard.StrategyObjectDatastore$3.activate(Strat
egyObjectDatastore.java:220)
    at 
com.vercer.engine.persist.translator.ObjectFieldTranslator.propertiesToType
safe(ObjectFieldTranslator.java:57)
    at 
com.vercer.engine.persist.translator.ListTranslator.propertiesToTypesafe(Li
stTranslator.java:48)
    at 
com.vercer.engine.persist.translator.ObjectFieldTranslator.activate(ObjectF
ieldTranslator.java:107)
    ... 30 more

What steps will reproduce the problem?

Persist an object with @Embedded (previously @Embed) annotation on a 
Map<String,String>.

What is the expected output? What do you see instead?

Since one can embed a List, I was hoping that one could also embed a Map. You 
get the following stacktrace with v2.0-alpha release, but I also had the same 
problem with latest v2.0 branch code:

Caused by: java.lang.IllegalStateException: Final field private final int 
java.lang.String.count cannot be stored
    at com.google.code.twig.annotation.AnnotationStrategy.store(AnnotationStrategy.java:67)
    at com.google.code.twig.standard.StrategyObjectDatastore$StrategyObjectFieldTranslator.stored(StrategyObjectDatastore.java:554)
    at com.google.code.twig.translator.ObjectFieldTranslator.encode(ObjectFieldTranslator.java:298)
    at com.google.code.twig.translator.MapTranslator.encode(MapTranslator.java:86)
    at com.google.code.twig.translator.ListTranslator.encode(ListTranslator.java:242)
    at com.google.code.twig.translator.ObjectFieldTranslator.encode(ObjectFieldTranslator.java:321)
    at com.google.code.twig.standard.StandardCommonStoreCommand.instanceToEntity(StandardCommonStoreCommand.java:213)
    at com.google.code.twig.standard.StandardSingleStoreCommand.now(StandardSingleStoreCommand.java:51)
    at com.google.code.twig.standard.StrategyObjectDatastore.store(StrategyObjectDatastore.java:159)
    at com.google.code.twig.standard.StrategyObjectDatastore.storeOrUpdate(StrategyObjectDatastore.java:249)
  ...

What version of the product are you using? On what operating system?

2.0 branch