Bug 197586 Compile error occurs in org.eclipse.birt.data in daily build 20070724-0630
Compile error occurs in org.eclipse.birt.data in daily build 20070724-0630. Please see the attachment for details.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/PreparedQueryUtil.java
return true;
	}
	
	private static boolean isTwoStringEqual( String s1, String s2 )
	{
		if ( s1 == null && s2 == null )
			return true;
		if ( s1 != null && s2 == null )
			return false;
		if ( s1 == null && s2 != null )
			return false;
		
		return s1.equals( s2 );
	}
	/**
	 * 
	 * @param obj1
	 * @param obj2
	 * @return
	 */
	private static boolean isTwoExpressionEqual( IBaseExpression obj1, IBaseExpression obj2 )
	{
		if( obj1 == null && obj2!= null )
			return false;
		if( obj1 != null && obj2 == null )
			return false;
		if ( obj1 == null && obj2 == null )
			return true;
		if ( !obj1.getClass( ).equals( obj2.getClass( ) ) )
			return false;