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.report.data.adapter/src/org/eclipse/birt/report/data/adapter/api/DataRequestSession.java
public abstract IResultMetaData refreshMetaData(
			DataSetHandle dataSetHandle, boolean holdEvent )
			throws BirtException;
	
	/**
	 * Retrieves all distinct values of a data set column and return them in a
	 * Collection.
	 * 
	 * @param dataSet
	 *            Handle of data set to query
	 * @param inputParamBindings
	 *            An iterator of ParamBindingHandle objects that defines
	 *            bindings for the data set's input parameters
	 * @param columnBindings
	 *            An iterator of ComputedColumnHandle objects that define all
	 *            column binding expressions
	 * @param columnName
	 *            Name of the bound column to retrieve values for
	 * @return If boundColumnName is bound to a single data set column, this
	 *         method returns a collection of distinct values for that data set
	 *         column. If boundColumnName to mapped to any other type of
	 *         expressions, an empty collection will be returned.
	 */
	public abstract Collection getColumnValueSet( DataSetHandle dataSet,
			Iterator inputParamBindings, Iterator columnBindings,
			String boundColumnName ) throws BirtException;
	
	
	/**
	 * Prepare a base data query, and return an IBasePreparedQuery instance