Bug 179661 NPE throws out when preview the attached report [1102]
Description: NPE throws out when preview the attached report [1102] Build number: 2.2.0.v20070328-0630 Steps to reproduce: 1, Using attached report design file 2, Preview Expected result: Previewed successfully Actual result: NPE throws out when preview Error log:
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/api/querydefn/Binding.java
{
	private List aggregateOn;
	private List argument;
	private IBaseExpression expr;
	private IBaseExpression filter;
	private String aggrFunc;
	private String name;
	private int dataType;
	
	public Binding( String name )
	{
		this.name = name;
		this.aggregateOn = new ArrayList();
		this.argument = new ArrayList();
	}
	/*
	 * (non-Javadoc)
	 * @see org.eclipse.birt.data.engine.api.IBinding#addAggregateOn(java.lang.String)
	 */
	public void addAggregateOn( String levelName )
	{
		this.aggregateOn.add( levelName );
	}
	/*
	 * (non-Javadoc)
	 * @see org.eclipse.birt.data.engine.api.IBinding#addArgument(org.eclipse.birt.data.engine.api.IBaseExpression)
	 */
	public void addArgument( IBaseExpression expr )
	{
		this.argument.add( expr );