1 /* 2 * Copyright 1999-2004 The Apache Software Foundation. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 /* 17 * $Id: Or.java,v 1.9 2004/02/17 04:35:12 minchau Exp $ 18 */ 19 package com.sun.org.apache.xpath.internal.operations; 20 21 import com.sun.org.apache.xpath.internal.XPathContext; 22 import com.sun.org.apache.xpath.internal.objects.XBoolean; 23 import com.sun.org.apache.xpath.internal.objects.XObject; 24 25 /** 26 * The 'or' operation expression executer. 27 */ 28 public class Or extends Operation 29 { 30 31 /** 32 * OR two expressions and return the boolean result. Override 33 * superclass method for optimization purposes. 34 * 35 * @param xctxt The runtime execution context. 36 * 37 * @return {@link com.sun.org.apache.xpath.internal.objects.XBoolean#S_TRUE} or 38 * {@link com.sun.org.apache.xpath.internal.objects.XBoolean#S_FALSE}. 39 * 40 * @throws javax.xml.transform.TransformerException 41 */ 42 public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException 43 { 44 45 XObject expr1 = m_left.execute(xctxt); 46 47 if (!expr1.bool()) 48 { 49 XObject expr2 = m_right.execute(xctxt); 50 51 return expr2.bool() ? XBoolean.S_TRUE : XBoolean.S_FALSE; 52 } 53 else 54 return XBoolean.S_TRUE; 55 } 56 57 /** 58 * Evaluate this operation directly to a boolean. 59 * 60 * @param xctxt The runtime execution context. 61 * 62 * @return The result of the operation as a boolean. 63 * 64 * @throws javax.xml.transform.TransformerException 65 */ 66 public boolean bool(XPathContext xctxt) 67 throws javax.xml.transform.TransformerException 68 { 69 return (m_left.bool(xctxt) || m_right.bool(xctxt)); 70 } 71 72 } 73