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data-exporter's Issues

1.0.4 release fails tests

Hey there,

it's me again, decided to finally incorporate the new 1.0.4 release into my application, just to find that 'mvn test' fails (for quite a few tests). :[

Jokes aside though, it might be slight side-effects of your recent changes, or some local problem on my end. I forced Maven to install it anyway and the output of my software is (as far as I can see) exactly as before and exactly as expected.

If you can't reproduce the test fails I could provide you with my 'mvn test' log. Here's my Maven version information:

Apache Maven 3.1.1 (0728685237757ffbf44136acec0402957f723d9a; 2013-09-17 17:22:22+0200)
Maven home: /usr/share/maven-bin-3.1
Java version: 1.7.0_45, vendor: Oracle Corporation
Java home: /opt/icedtea-bin-7.2.4.3/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.14.0-gentoo", arch: "amd64", family: "unix"

Thanks!

TextAligner splits text regardless of cell height

When using the alignment MIDDLE_LEFT, MIDDLE_CENTER or MIDDLE_RIGHT, the text aligner ignores the cell height and generates several lines, only the first of which is actually shown in the output (when the cell height is 1). Unit tests do not uncover this bug because the cell content is too short to trigger it.

Cell value cannot be null or empty string 

Caused by: java.lang.IllegalArgumentException: Height or width cannot be less than or equal to zero.
    at com.brsanthu.dataexporter.TextAligner.align(TextAligner.java:191)
    at com.brsanthu.dataexporter.TextAligner.align(TextAligner.java:184)
    at com.brsanthu.dataexporter.TextAligner.getRowHeight(TextAligner.java:162)
    at com.brsanthu.dataexporter.output.texttable.TextTableWriter.getMaxRowHeight(TextTableWriter.java:177)
    at com.brsanthu.dataexporter.output.texttable.TextTableWriter.formatRowCells(TextTableWriter.java:129)
    at com.brsanthu.dataexporter.output.texttable.TextTableWriter.writeRow(TextTableWriter.java:106)
    at com.brsanthu.dataexporter.DataWriter.writeRows(DataWriter.java:124)
    at com.brsanthu.dataexporter.DataExporter.addRows(DataExporter.java:183)

This is imho valid data, just handle it:

        StringWriter out = new StringWriter();
        TextTableExporter exporter = new TextTableExporter(out);
        exporter.addColumn("foo");
        exporter.addColumn("bar");
        exporter.addRow("foo", null);

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