org.apache.ctakes.jdl.data.xml.DomUtil Maven / Gradle / Ivy

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.ctakes.jdl.data.xml;

import org.apache.ctakes.core.resource.FileLocator;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
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.*;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;

/**
 * Utility to manage DOM.
 * 
 * @author mas
 */
public final class DomUtil {
	private DomUtil() {
	}

	/**
	 * @return the emptyDocument
	 * @throws ParserConfigurationException
	 *             exception
	 */
	public static Document getEmptyDocument() throws ParserConfigurationException {
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		factory.setNamespaceAware(true);
		// factory.setValidating(true);
		DocumentBuilder builder = factory.newDocumentBuilder();
		return builder.newDocument();
	}

	/**
	 * @param node
	 *            the node to convert
	 * @return the document
	 */
	public static Document nodeToDocument(final Node node) {
		try {
			Document document = getEmptyDocument();
			document.appendChild(document.importNode(node, true));
			return document;
		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * @param strXml
	 *            the strXml to convert
	 * @return the documnet
	 */
	public static Document strToDocument(final String strXml) {
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		factory.setNamespaceAware(true);
		// factory.setValidating(true);
		try {
			DocumentBuilder builder = factory.newDocumentBuilder();
			return builder.parse(new InputSource(new StringReader(strXml)));
		} catch (SAXException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * @param srcXml
	 *            the srcXml to convert
	 * @return the document
	 */
	public static Document srcToDocument(final String srcXml) {
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		factory.setNamespaceAware(true);
		// factory.setValidating(true);
		try {
			DocumentBuilder builder = factory.newDocumentBuilder();
			// return builder.parse(new InputSource(srcXml));
//			return builder.parse(srcXml);
			return builder.parse( FileLocator.getStreamQuiet( srcXml ) );
		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SAXException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * @param node
	 *            the node to convert
	 * @return the node
	 */
	public static String nodeToStr(final Node node) {
		final String YES = "yes";
		StringWriter sw = new StringWriter();
		try {
			Transformer transformer = TransformerFactory.newInstance().newTransformer();
			transformer.setOutputProperty(OutputKeys.INDENT, YES);
			transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, YES);
			transformer.transform(new DOMSource(node), new StreamResult(sw));
			return sw.toString().trim();
		} catch (TransformerFactoryConfigurationError e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (TransformerException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}
}