Bug 192347 [acceptance]Theme cannot be deleted[01]
Description: [acceptance]Theme cannot be deleted Build number:2.2.0.v20070613 Steps to reproduce: 1. New a library. 2. New a theme and delete it. Expected result: Theme can be deleted Actual result: Delete key doesn't work and no delete item in context menu. Error log:n/a
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
* 
	 * @param targetObj
	 *            target
	 * @param length
	 *            the length of elements in source.If do not add to target, set
	 *            zero
	 * @return whether target can contain more elements
	 */
	public static boolean handleValidateTargetCanContainMore( Object targetObj,
			int length )
	{
		if ( targetObj == null || length < 0 )
		{
			return false;
		}
		if ( targetObj instanceof StructuredSelection )
		{
			return handleValidateTargetCanContainMore( ( (StructuredSelection) targetObj ).toArray( ),
					length );
		}
		if ( targetObj instanceof Object[] )
		{
			Object[] array = (Object[]) targetObj;
			for ( int i = 0; i < array.length; i++ )
			{
				if ( !handleValidateTargetCanContainMore( array[i], length ) )
				{
					return false;
				}
			}