Bug 187201 DTE should give out 4 API for CrossTab sort and filter
DTE should give out 4 API for CrossTab sort and filter. 2 apis are used by giving out the available binding for CrossTab sort and filter. The third is api used by giving out the member value viewer is available. The fourth api is used by giving out the available value list about the memeber value.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/util/OlapExpressionUtil.java
* @param expr
	 * @return String[]
	 */
	private static String[] getTargetLevel( String expr )
	{
		
		if ( expr == null )
			return null;
		if ( !expr.matches( "\\Qdimension[\"\\E.*\\Q\"][\"\\E.*\\Q\"]\\E" ) )
			return null;
		expr = expr.replaceFirst( "\\Qdimension\\E", "" );
		String[] result = expr.split( "\\Q\"][\"\\E" );
		result[0] = result[0].replaceAll( "\\Q[\"\\E", "" );
		result[1] = result[1].replaceAll( "\\Q\"]\\E", "" );
		return result;
	}
	
	/**
	 * 
	 * @param expr
	 * @return
	 * @throws DataException
	 */
	public static DimLevel getTargetDimLevel( String expr ) throws DataException
	{
		final String[] target = getTargetLevel( expr );
		if ( target == null || target.length != 2 )
		{
			throw new DataException( ResourceConstants.LEVEL_NAME_NOT_FOUND,
					expr );