Java tutorial
//package com.java2s; /* * MIT License * Copyright (c) 2016 Estonian Information System Authority (RIA) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import org.w3c.dom.Node; import javax.xml.xpath.*; public class Main { /** * Evaluates the XPath expression in the specified context and returns whether such element was found. * * @param node the XML document to evaluate * @param expression the compiled XPath expression * @return <code>true</code> if the given expression evaluates to an existing element in the given node, * <code>false</code> otherwise */ public static boolean evaluate(Node node, XPathExpression expression) { try { Boolean result = (Boolean) expression.evaluate(node, XPathConstants.BOOLEAN); return result != null && result; } catch (XPathExpressionException e) { return false; } } }