Bug 211175 ClassCastException thrown when implementing IReportItemQuery
When implementing IReportItemQuery's method, public IDataQueryDefinition[] createReportQueries(IDataQueryDefinition parent) throws BirtException, even if the impl method returns IDataQueryDefinition[], ClassCastException will be thrown during preview, the error log is as follows: java.lang.ClassCastException: [Lorg.eclipse.birt.data.engine.api.IDataQueryDefinition; at org.eclipse.birt.report.engine.executor.ExtendedGenerateExecutor.generateContent(ExtendedGenerateExecutor.java:91) at org.eclipse.birt.report.engine.executor.ExtendedGenerateExecutor.execute(ExtendedGenerateExecutor.java:72) at org.eclipse.birt.report.engine.executor.ExtendedItemExecutor.execute(ExtendedItemExecutor.java:60) at org.eclipse.birt.report.engine.internal.executor.dup.SuppressDuplicateItemExecutor.execute(SuppressDuplicateItemExecutor.java:42) If the method returns IBaseQueryDefinition[], it's ok. Look at the engine code, there's something wrong of class casting when generating content.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/extension/internal/ReportItemGenerationInfo.java
{
	private ExtendedItemHandle modelHandle = null;
	private ClassLoader loader = null;
	private IReportContext context = null;
	private IBaseQueryDefinition[] queries = null;
	private IContent content = null;
	public ClassLoader getApplicationClassLoader( )
	{
		return loader;
	}
	public void setApplicationClassLoader( ClassLoader loader )
	{
		this.loader = loader;
	}
	public ExtendedItemHandle getModelObject( )
	{
		return modelHandle;
	}