holon-platform / holon-json Goto Github PK

Holon Platform JSON support module.

License: Apache License 2.0

Java 100.00%

json gson jax-rs java-8 jackson holon-platform json-serialization holon-json message-serialization deserialization-support

holon-json's People

Contributors

Stargazers

Watchers

Forkers

rrighi

holon-json's Issues

Cache the PropertyBox serialization tree model to improve performances

Update holon-core to version 5.2.1

Update to JAX-RS API version 2.1

Add Jackson JSR-310 (jdk8 temporal API) module to configuration helper

Using JacksonConfiguration.configure(ObjectMapper objectMapper)

Provide context resource lookup in JAX-RS context resolvers for Jackson ObjectMapper and Gson GsonBuilder

Upgrade jackson-databind to version 2.9.9.3

Fix Jackson 2.9.9 vulnerabity issues

Update Holon core to 5.0.6

Update holon-maven to 1.0.10

Upgrade Jackson to version 2.9.7

Getting class cast exception

I'm getting this error

Exception in thread "main" java.lang.ClassCastException: class com.google.gson.internal.LinkedTreeMap cannot be cast to class com.holonplatform.core.property.PropertyBox (com.google.gson.internal.LinkedTreeMap and com.holonplatform.core.property.PropertyBox are in unnamed module of loader 'app')

and my code is

ListPathProperty<PropertyBox> DASAENTRIES = ListPathProperty.propertyBox("dasaEntries",DasaEntries.PROPERTIES);
    PropertySet<?> PROPERTIES = PropertySet.builderOf(DASAENTRIES)
            .build();
    PathProperty<PropertyBox> VIMSHOTTARIDASA = PathProperty.create("vimshottariDasa", PropertyBox.class)
            .withConfiguration(PropertySet.PROPERTY_CONFIGURATION_ATTRIBUTE,PROPERTIES)

            ;


List<PropertyBox> dasaEntriesBox = propertyBox.getValue(VimshottariDasa.DASAENTRIES);

            for (PropertyBox pb : dasaEntriesBox) {
                System.out.println(pb);
            }

The error gets popup when I use this line

for (PropertyBox pb : dasaEntriesBox) {
                System.out.println(pb);
            }

Please help me to resolve this error.

Update Jackson to 2.9.4

Upgrade Jackson to 2.10.1

Upgrade holon-core to 5.1.2

Update holon-core to 5.1.1

JDK9: set a stable module name with `Automatic-Module-Name` entry in MANIFEST file

And revise internal packages organization to ensure the root module name hierarchy consistency

Update Jackson to version 2.9.3

Upgrade to Jersey 2.35

Updaet Jackson to version 2.9.3

Upgrade Holon core to 5.0.2

Update holon-core to 5.5.0

Upgrade holon-core to 5.0.3

Use a common JsonLogger for all module artifacts

Implement the new Json API using Jackson

Upgrade holon-core to 5.3.0

Update Gson to 2.8.4

Convert unit tests to JUnit 5

Upgrade Jackson to 2.9.9

Update holon-core to version 5.2.2

Provide consistent date and time JSON serialization and deserialization using ISO-8601 format

Include legacy java.util.Date and java.sql.Date type, in addition to jdk8 java.time.* API types

Upgrade to Jackson 2.13.5

Upgrade Jackson to 2.9.2

Generic and abstract JSON serialization and deserialization API, with explicit array/collections and PropertyBox support

Upgrade Gson to 2.8.6

Ensure JAX-RS 2.1 / Jersey 2.26+ compatibility

Upgrade holon-core to 5.4.0

Update Jackson to 2.9.6

Getting class cast exception for Jackson library

I'm trying to deserialize a json string which contains an Array.

 ListPathProperty<PropertyBox> DASAENTRIES = ListPathProperty.propertyBox("dasaEntries",DasaEntries.PROPERTIES);
    PropertySet<?> PROPERTIES = PropertySet.builderOf(DASAENTRIES)
            .build();
    PathProperty<PropertyBox> VIMSHOTTARIDASA = PathProperty.create("vimshottariDasa", PropertyBox.class)
            .withConfiguration(PropertySet.PROPERTY_CONFIGURATION_ATTRIBUTE,PROPERTIES)

            ;

When trying to get this value from JSON string, I'm getting this exception

Exception in thread "main" java.lang.ClassCastException: class java.util.LinkedHashMap cannot be cast to class com.holonplatform.core.property.PropertyBox (java.util.LinkedHashMap is in module java.base of loader 'bootstrap'; com.holonplatform.core.property.PropertyBox is in unnamed module of loader 'app')
	at java.base/java.util.ArrayList$Itr.forEachRemaining(ArrayList.java:999)
	at com.example.application.data.test.TestJson.lambda$getDasaEntries$2(TestJson.java:234)
	at java.base/java.util.Optional.ifPresent(Optional.java:176)
	at com.example.application.data.test.TestJson.lambda$getDasaEntries$3(TestJson.java:232)
	at java.base/java.util.Optional.ifPresent(Optional.java:176)
	at com.example.application.data.test.TestJson.getDasaEntries(TestJson.java:230)
	at com.example.application.data.test.TestJson.test(TestJson.java:152)
	at com.example.application.data.test.TestJson.main(TestJson.java:63)

This is where I'm getting the error

responseBox.getValueIfPresent(VimshottariDasa.VIMSHOTTARIDASA)
                .ifPresent(propertyBox -> {
                    propertyBox.getValueIfPresent(VimshottariDasa.DASAENTRIES)
                            .ifPresent(propertyBoxes -> {

                                for (PropertyBox box : propertyBoxes) { // error line
                                    
                                }

Looks there is some problem in casting and the below proves the same.

if (propertyBoxes.get(0) instanceof LinkedHashMap) {
                                    LinkedHashMap<?,?> map = (LinkedHashMap<?, ?>) propertyBoxes.get(0);
                                    map.entrySet()
                                            .stream()
                                            .forEach(entry -> {
                                                write(entry.getKey() +"\t" + entry.getValue());
                                            });
                                }else {
                                    write("not sure ");
                                }

Could you please check this ?