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/ReportItemPresentationBase.java
}
	/* (non-Javadoc)
	 * @see org.eclipse.birt.report.engine.extension.IReportItemPresentation#setActionHandler(org.eclipse.birt.report.engine.api.IHTMLActionHandler)
	 */
	public void setActionHandler(IHTMLActionHandler ah) {
		this.ah = ah;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.birt.report.engine.extension.IReportItemPresentation#setDynamicStyle(org.eclipse.birt.report.engine.content.IStyle)
	 */
	public void setDynamicStyle( IStyle style )
	{
		this.style = style;
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.extension.IReportItemPresentation#setExtendedItemContent(org.eclipse.birt.report.engine.content.IContent)
	 */
	public void setExtendedItemContent( IContent content )
	{
		this.content = content;
	}
	public IReportItemPresentationInfo getPresentationConfig( )
	{
		return info;
	}
}