Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
    
 Copyright 2015-2016 Artem Stasiuk
    
 Licensed 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.
    
 */

import org.w3c.dom.Document;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.StringReader;

public class Main {
    public static String findInXml(String xml, String xpath) {
        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            builder.setEntityResolver(new EntityResolver() {
                @Override
                public InputSource resolveEntity(String publicId, String systemId)
                        throws SAXException, IOException {
                    //                    if (systemId.contains("foo.dtd")) {
                    return new InputSource(new StringReader(""));
                    //                    } else {
                    //                        return null;
                    //                    }
                }
            });
            Document doc = builder.parse(new InputSource(new ByteArrayInputStream(xml.getBytes("utf-8"))));
            XPathFactory xPathfactory = XPathFactory.newInstance();
            XPathExpression expr = xPathfactory.newXPath().compile(xpath);
            return (String) expr.evaluate(doc, XPathConstants.STRING);
        } catch (Throwable t) {
            throw new RuntimeException(t);
        }
    }
}