/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
//
/**
* @author Neeraj Joshi
*
*/
package org.apache.imperius.spl.parser.expressions.impl;
import java.util.List;
import java.util.logging.Logger;
import org.apache.imperius.spl.core.TypeConstants;
import org.apache.imperius.spl.core.TypeInfo;
import org.apache.imperius.spl.parser.exceptions.SPLException;
import org.apache.imperius.spl.parser.expressions.BooleanExpression;
import org.apache.imperius.spl.parser.expressions.DoubleArgumentExpression;
import org.apache.imperius.spl.parser.util.ExpressionUtility;
import org.apache.imperius.spl.parser.util.TypeResolver;
import org.apache.imperius.util.Messages;
import org.apache.imperius.util.SPLLogger;
public class Greater extends DoubleArgumentExpression implements
BooleanExpression
{
public static final String className = Greater.class.getName();
private static Logger logger = SPLLogger.getSPLLogger().getLogger();
private static final String sourceClass="Greater";
public Greater(List exprList, boolean validateExpression)
throws SPLException
{
super(exprList);
logger.entering(sourceClass,Thread.currentThread().getName()+" "+ "Greater");
if (validateExpression)
{
if (!validate())
{
logger.severe(Thread.currentThread().getName()+" "+"validation error: " + className
+ " has wrong data type passed in.");
throw new SPLException(Messages.getString(
"SPL_VALIDATION_ERROR_MSG", new Object[] { className }));
}
}
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "Greater");
}
public Object evaluate() throws SPLException
{
logger.entering(sourceClass,Thread.currentThread().getName()+" "+ "evaluate");
try
{
//System.out.println("Greater::LHS type: RHS type ::" + lhsExp.getType() + ":" + rhsExp.getType());
Object lhsValue = _lhsExp.evaluate();
Object rhsValue = _rhsExp.evaluate();
//System.out.println("Greater::after Evaluation LHS: RHS ::"+ lhsValue + ":" + rhsValue);
if (ExpressionUtility.compare(lhsValue, rhsValue) > 0)
{
//System.out.println("Greater::True");
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "evaluate");
return Boolean.TRUE;
}
else
{
//System.out.println("Greater::false");
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "evaluate");
return Boolean.FALSE;
}
}
catch (Exception e)
{
logger.severe(Thread.currentThread().getName()+" "+"evaluation error: " + e.toString());
throw new SPLException(Messages.getString(
"SPL_EVALUATION_ERROR_MSG", new Object[] { e
.getLocalizedMessage() }),e);
}
}
public boolean validate() throws SPLException
{
logger.entering(sourceClass,Thread.currentThread().getName()+" "+ "validate");
boolean validation = false;
TypeInfo lType = _lhsExp.getType();
TypeInfo rType = _rhsExp.getType();
//System.out.println("Greater:validate:TypeResolver.isBoolean(lType)"+ TypeResolver.isBoolean(lType));
//System.out.println("Greater:validate:TypeResolver.isBoolean(rType)"+ TypeResolver.isBoolean(rType));
if (!lType.getIsArray() && !rType.getIsArray() &&
TypeResolver.isTypeAssignableForRelation(lType, rType))
{
_dataType.setType(TypeConstants.booleanType);
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "validate");
validation = true;
}
if (!lType.getIsArray() && !rType.getIsArray() &&
(TypeResolver.isCalendar(lType))&&
(TypeResolver.isCalendar(rType)))
{
_dataType.setType(TypeConstants.booleanType);
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "validate");
validation = true;
}
if(!validation)
{
throw new SPLException(Messages.getString(
"SPL_TYPE_NOT_COMPATIBLE_EXCEPTION_MSG", new Object[] {
lType, rType }));
}
else
{
return validation;
}
}
public String toString()
{
logger.entering(sourceClass,Thread.currentThread().getName()+" "+ "toString");
//Xiping 10/14/08
//String str = this._lhsExp.toString() + ">" + this._rhsExp.toString() +")";
String str = this._lhsExp.toString() + " > " + this._rhsExp.toString();
logger.exiting(sourceClass,Thread.currentThread().getName()+" "+ "toString");
return str;
}
}