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
public void setModelObject( ExtendedItemHandle modelHandle )
	{
		this.modelHandle = modelHandle;
	}
	public IReportContext getReportContext( )
	{
		return context;
	}
	public void setReportContext( IReportContext context )
	{
		this.context = context;
	}
	public IBaseQueryDefinition[] getReportQueries( )
	{
		return queries;
	}
	public void setReportQueries( IBaseQueryDefinition[] queries )
	{
		this.queries = queries;
	}
	public IContent getExtendedItemContent( )
	{
		return content;
	}
	public void setExtendedItemContent( IContent content )
	{
		this.content = content;
	}
}