77 lines
2.7 KiB
Java
77 lines
2.7 KiB
Java
/**
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*
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* Copyright 2017-2018 Florian Schmaus.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.util;
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import java.io.StringReader;
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import java.io.StringWriter;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import javax.xml.transform.OutputKeys;
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import javax.xml.transform.Transformer;
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import javax.xml.transform.TransformerException;
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import javax.xml.transform.TransformerFactory;
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import javax.xml.transform.stream.StreamResult;
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import javax.xml.transform.stream.StreamSource;
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public class XmlUtil {
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private static final Logger LOGGER = Logger.getLogger(XmlUtil.class.getName());
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private static final TransformerFactory transformerFactory = TransformerFactory.newInstance();
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static {
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try {
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transformerFactory.setAttribute("indent-number", 2);
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} catch (IllegalArgumentException e) {
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LOGGER.log(Level.INFO, "XML TransformerFactory does not support indent-number attribute", e);
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}
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}
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public static String prettyFormatXml(CharSequence xml) {
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String xmlString = xml.toString();
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StreamSource source = new StreamSource(new StringReader(xmlString));
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StringWriter stringWriter = new StringWriter();
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StreamResult result = new StreamResult(stringWriter);
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try {
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Transformer transformer = transformerFactory.newTransformer();
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transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
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transformer.setOutputProperty(OutputKeys.INDENT, "yes");
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transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
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// Transform the requested string into a nice formatted XML string
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transformer.transform(source, result);
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}
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catch (TransformerException | IllegalArgumentException e) {
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LOGGER.log(Level.SEVERE, "Transformer error", e);
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return xmlString;
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}
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return stringWriter.toString();
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}
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public static boolean isClarkNotation(String text) {
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if (text.isEmpty()) {
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return false;
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}
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// TODO: This is currently a mediocre heuristic to check for clark notation.
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return text.charAt(0) == '{';
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}
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}
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