1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 /* 19 * $Id: And.java 468655 2006-10-28 07:12:06Z minchau $ 20 */ 21 package org.apache.xpath.operations; 22 23 import org.apache.xpath.XPathContext; 24 import org.apache.xpath.objects.XBoolean; 25 import org.apache.xpath.objects.XObject; 26 27 /** 28 * The 'and' operation expression executer. 29 */ 30 public class And extends Operation 31 { 32 static final long serialVersionUID = 392330077126534022L; 33 34 /** 35 * AND two expressions and return the boolean result. Override 36 * superclass method for optimization purposes. 37 * 38 * @param xctxt The runtime execution context. 39 * 40 * @return {@link org.apache.xpath.objects.XBoolean#S_TRUE} or 41 * {@link org.apache.xpath.objects.XBoolean#S_FALSE}. 42 * 43 * @throws javax.xml.transform.TransformerException 44 */ execute(XPathContext xctxt)45 public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException 46 { 47 48 XObject expr1 = m_left.execute(xctxt); 49 50 if (expr1.bool()) 51 { 52 XObject expr2 = m_right.execute(xctxt); 53 54 return expr2.bool() ? XBoolean.S_TRUE : XBoolean.S_FALSE; 55 } 56 else 57 return XBoolean.S_FALSE; 58 } 59 60 /** 61 * Evaluate this operation directly to a boolean. 62 * 63 * @param xctxt The runtime execution context. 64 * 65 * @return The result of the operation as a boolean. 66 * 67 * @throws javax.xml.transform.TransformerException 68 */ bool(XPathContext xctxt)69 public boolean bool(XPathContext xctxt) 70 throws javax.xml.transform.TransformerException 71 { 72 return (m_left.bool(xctxt) && m_right.bool(xctxt)); 73 } 74 75 } 76