001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018package org.apache.commons.jxpath.ri.compiler; 019 020import org.apache.commons.jxpath.ri.EvalContext; 021import org.apache.commons.jxpath.ri.InfoSetUtil; 022 023/** 024 * Implementation of {@link Expression} for the operation "and". 025 */ 026public class CoreOperationAnd extends CoreOperation { 027 028 /** 029 * Constructs a new CoreOperationAnd. 030 * 031 * @param args to combine 032 */ 033 public CoreOperationAnd(final Expression[] args) { 034 super(args); 035 } 036 037 @Override 038 public Object computeValue(final EvalContext context) { 039 for (final Expression arg : args) { 040 if (!InfoSetUtil.booleanValue(arg.computeValue(context))) { 041 return Boolean.FALSE; 042 } 043 } 044 return Boolean.TRUE; 045 } 046 047 @Override 048 protected int getPrecedence() { 049 return AND_PRECEDENCE; 050 } 051 052 @Override 053 public String getSymbol() { 054 return "and"; 055 } 056 057 @Override 058 protected boolean isSymmetric() { 059 return true; 060 } 061}