X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Ftodesbaum%2Futil%2Fxml%2FXML.java;fp=src%2Fmain%2Fjava%2Fde%2Ftodesbaum%2Futil%2Fxml%2FXML.java;h=8b6b259fe885e9130981ec20b5e3c39a1542b0f3;hb=0e88169c3e8decfcd99f39f5ecf3a85df50c3fca;hp=0000000000000000000000000000000000000000;hpb=953de352675a4ad91fe307d816a4ea7780c94274;p=jSite.git

diff --git a/src/main/java/de/todesbaum/util/xml/XML.java b/src/main/java/de/todesbaum/util/xml/XML.java
new file mode 100644
index 0000000..8b6b259
--- /dev/null
+++ b/src/main/java/de/todesbaum/util/xml/XML.java
@@ -0,0 +1,179 @@
+/*
+ * jSite - XML.java - Copyright © 2006–2012 David Roden
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+package de.todesbaum.util.xml;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.nio.charset.Charset;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.transform.Result;
+import javax.xml.transform.Source;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerConfigurationException;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.dom.DOMResult;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+import javax.xml.transform.stream.StreamSource;
+
+import org.w3c.dom.Document;
+
+
+/**
+ * Contains method to transform DOM XML trees to byte arrays and vice versa.
+ *
+ * @author David Roden <droden@gmail.com>
+ * @version $Id:XML.java 221 2006-03-06 14:46:49Z bombe $
+ */
+public class XML {
+
+	/** Cached document builder factory. */
+	private static DocumentBuilderFactory documentBuilderFactory = null;
+
+	/** Cached document builder. */
+	private static DocumentBuilder documentBuilder = null;
+
+	/** Cached transformer factory. */
+	private static TransformerFactory transformerFactory = null;
+
+	/** Does nothing. */
+	private XML() {
+	}
+
+	/**
+	 * Returns a document builder factory. If possible the cached instance will be returned.
+	 *
+	 * @return A document builder factory
+	 */
+	private static DocumentBuilderFactory getDocumentBuilderFactory() {
+		if (documentBuilderFactory != null) {
+			return documentBuilderFactory;
+		}
+		documentBuilderFactory = DocumentBuilderFactory.newInstance();
+		return documentBuilderFactory;
+	}
+
+	/**
+	 * Returns a document builder. If possible the cached instance will be returned.
+	 *
+	 * @return A document builder
+	 */
+	private static DocumentBuilder getDocumentBuilder() {
+		if (documentBuilder != null) {
+			return documentBuilder;
+		}
+		try {
+			documentBuilder = getDocumentBuilderFactory().newDocumentBuilder();
+		} catch (ParserConfigurationException e) {
+		}
+		return documentBuilder;
+	}
+
+	/**
+	 * Returns a transformer factory. If possible the cached instance will be returned.
+	 *
+	 * @return A transformer factory
+	 */
+	private static TransformerFactory getTransformerFactory() {
+		if (transformerFactory != null) {
+			return transformerFactory;
+		}
+		transformerFactory = TransformerFactory.newInstance();
+		return transformerFactory;
+	}
+
+	/**
+	 * Creates a new XML document.
+	 *
+	 * @return A new XML document
+	 */
+	public static Document createDocument() {
+		return getDocumentBuilder().newDocument();
+	}
+
+	/**
+	 * Transforms the DOM XML document into a byte array.
+	 *
+	 * @param document
+	 *            The document to transform
+	 * @return The byte array containing the XML representation
+	 */
+	public static byte[] transformToByteArray(Document document) {
+		ByteArrayOutputStream byteOutput = new ByteArrayOutputStream();
+		OutputStreamWriter converter = new OutputStreamWriter(byteOutput, Charset.forName("UTF-8"));
+		Result transformResult = new StreamResult(converter);
+		Source documentSource = new DOMSource(document);
+		try {
+			Transformer transformer = getTransformerFactory().newTransformer();
+			transformer.transform(documentSource, transformResult);
+			byteOutput.close();
+			return byteOutput.toByteArray();
+		} catch (IOException ioe1) {
+		} catch (TransformerConfigurationException tce1) {
+		} catch (TransformerException te1) {
+		} finally {
+			try {
+				byteOutput.close();
+			} catch (IOException ioe1) {
+			}
+		}
+		return null;
+	}
+
+	/**
+	 * Transforms the byte array into a DOM XML document.
+	 *
+	 * @param data
+	 *            The byte array to parse
+	 * @return The DOM XML document
+	 */
+	public static Document transformToDocument(byte[] data) {
+		ByteArrayInputStream byteInput = new ByteArrayInputStream(data);
+		InputStreamReader converter = new InputStreamReader(byteInput, Charset.forName("UTF-8"));
+		Source xmlSource = new StreamSource(converter);
+		Result xmlResult = new DOMResult();
+		try {
+			Transformer transformer = getTransformerFactory().newTransformer();
+			transformer.transform(xmlSource, xmlResult);
+			return (Document) ((DOMResult) xmlResult).getNode();
+		} catch (TransformerConfigurationException tce1) {
+		} catch (TransformerException te1) {
+		} finally {
+			if (byteInput != null)
+				try {
+					byteInput.close();
+				} catch (IOException ioe1) {
+				}
+			if (converter != null)
+				try {
+					converter.close();
+				} catch (IOException ioe1) {
+				}
+		}
+		return null;
+	}
+
+}