com.predic8.membrane.core.util.XMLUtil Maven / Gradle / Ivy

/* Copyright 2024 predic8 GmbH, www.predic8.com

   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.predic8.membrane.core.util;

import org.w3c.dom.*;

import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
import java.io.*;

import static javax.xml.transform.OutputKeys.INDENT;
import static javax.xml.transform.OutputKeys.OMIT_XML_DECLARATION;

public class XMLUtil {

    // TODO 2. param boolean indent
    // Write Test
    public static String xml2string(Document doc) throws TransformerException {
        TransformerFactory tfFactory = TransformerFactory.newInstance(); // Comment ThreadSafe? with URL
        Transformer tf = tfFactory.newTransformer();
        tf.setOutputProperty(OMIT_XML_DECLARATION, "yes");

        tf.setOutputProperty(INDENT, "yes");
        tf.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");

        StringWriter writer = new StringWriter();
        tf.transform(new DOMSource(doc), new StreamResult(writer));
        return writer.toString();
    }
}