org.apache.commons.jexl.parser.ASTGTNode Maven / Gradle / Ivy
/*
* 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.
*/
package org.apache.commons.jexl.parser;
import org.apache.commons.jexl.JexlContext;
import org.apache.commons.jexl.util.Coercion;
/**
* GT : a > b.
*
* Follows A.3.6.1 of the JSTL 1.0 specification
*
* @author Geir Magnusson Jr.
* @author Peter Royal
* @version $Id: ASTGTNode.java 480412 2006-11-29 05:11:23Z bayard $
*/
public class ASTGTNode extends SimpleNode {
/**
* Create the node given an id.
*
* @param id node id.
*/
public ASTGTNode(int id) {
super(id);
}
/**
* Create a node with the given parser and id.
*
* @param p a parser.
* @param id node id.
*/
public ASTGTNode(Parser p, int id) {
super(p, id);
}
/** {@inheritDoc} */
public Object jjtAccept(ParserVisitor visitor, Object data) {
return visitor.visit(this, data);
}
/** {@inheritDoc} */
public Object value(JexlContext jc) throws Exception {
/*
* now get the values
*/
Object left = ((SimpleNode) jjtGetChild(0)).value(jc);
Object right = ((SimpleNode) jjtGetChild(1)).value(jc);
if ((left == right) || (left == null) || (right == null)) {
return Boolean.FALSE;
} else if (Coercion.isFloatingPoint(left)
|| Coercion.isFloatingPoint(right)) {
double leftDouble = Coercion.coerceDouble(left).doubleValue();
double rightDouble = Coercion.coerceDouble(right).doubleValue();
return leftDouble > rightDouble ? Boolean.TRUE : Boolean.FALSE;
} else if (Coercion.isNumberable(left) || Coercion.isNumberable(right)) {
long leftLong = Coercion.coerceLong(left).longValue();
long rightLong = Coercion.coerceLong(right).longValue();
return leftLong > rightLong ? Boolean.TRUE : Boolean.FALSE;
} else if (left instanceof String || right instanceof String) {
String leftString = left.toString();
String rightString = right.toString();
return leftString.compareTo(rightString) > 0 ? Boolean.TRUE
: Boolean.FALSE;
} else if (left instanceof Comparable) {
return ((Comparable) left).compareTo(right) > 0 ? Boolean.TRUE
: Boolean.FALSE;
} else if (right instanceof Comparable) {
return ((Comparable) right).compareTo(left) < 0 ? Boolean.TRUE
: Boolean.FALSE;
}
throw new Exception("Invalid comparison : GT ");
}
}