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A web service test double for all occasions

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/*
 * Copyright (C) 2011 Thomas Akehurst
 *
 * 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.
 */
package com.github.tomakehurst.wiremock.common;

import org.w3c.dom.Document;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;

import static com.github.tomakehurst.wiremock.common.Exceptions.throwUnchecked;
import static javax.xml.transform.OutputKeys.INDENT;
import static javax.xml.transform.OutputKeys.OMIT_XML_DECLARATION;

public class Xml {

    public static String prettyPrint(String xml) {
        try {
            Document doc = read(xml);
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            transformerFactory.setAttribute("indent-number", 2);
            Transformer transformer = transformerFactory.newTransformer();
            transformer.setOutputProperty(INDENT, "yes");
            transformer.setOutputProperty(OMIT_XML_DECLARATION, "yes");
            StreamResult result = new StreamResult(new StringWriter());
            DOMSource source = new DOMSource(doc);
            transformer.transform(source, result);
            return result.getWriter().toString();
        } catch (Exception e) {
            return throwUnchecked(e, String.class);
        }
    }

    public static Document read(String xml) throws ParserConfigurationException, SAXException, IOException {
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();
        InputSource is = new InputSource(new StringReader(xml));
        return db.parse(is);
    }
}