Bug 201019 [Automation][Regression]Exception is thrown when running reportdesign
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/adapter/ExpressionUtil.java
public IBinding[] getColumnBindings( )
	{
		IBinding[] result = new IBinding[columnBindings.size()];
		for ( int i = 0; i < result.length; i++ )
		{
			result[i] = (IBinding) columnBindings.get( i );
		}
		return result;
	}
	
	public void addNewExpression( Object expr )
	{
		this.newExprs.add( expr );
	}
	public void addColumnBindings( List columnBindingList )
	{
		for( int i = 0; i < columnBindingList.size( ); i++ )
		{
			if( !this.columnBindings.contains( columnBindingList.get( i ) ))
			{
				this.columnBindings.add( columnBindingList.get( i ) );
			}
		}
	}
}
/**
 * A utility class for internal use only.
 * 
 */
class ParseIndicator