Bug 201030 NPE throws out when preview the attached report design
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/script/ScriptEvalUtil.java
result = !match( resultObject, resultOp[0] );
				break;
			case IConditionalExpression.OP_IN :
				result = in( obArray );
				break;
			case IConditionalExpression.OP_NOT_IN :
				result = !in( obArray );
				break;
			default :
				throw new DataException(
						ResourceConstants.UNSUPPORTTED_COND_OPERATOR, new Integer(operator) );
		}
		
		logger.exiting( ScriptEvalUtil.class.getName( ),
				"evalConditionalExpr",
				new Boolean( result ) );
		return new Boolean( result );
	}
	/**
	 * @param o1
	 * @return
	 */
	private static ExprTextAndValue createExprTextAndValueInstance( Object o )
	{
		ExprTextAndValue op;
		if(! (o instanceof ExprTextAndValue ))
			op = ExprTextAndValue.newInstance( "", o );
		else
			op = (ExprTextAndValue)o;
		return op;