diff options
Diffstat (limited to 'plugins/org.eclipse.wst.server.ui/serverui/org/eclipse/wst/server/ui/internal/audio/XMLMemento.java')
| -rw-r--r-- | plugins/org.eclipse.wst.server.ui/serverui/org/eclipse/wst/server/ui/internal/audio/XMLMemento.java | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/plugins/org.eclipse.wst.server.ui/serverui/org/eclipse/wst/server/ui/internal/audio/XMLMemento.java b/plugins/org.eclipse.wst.server.ui/serverui/org/eclipse/wst/server/ui/internal/audio/XMLMemento.java deleted file mode 100644 index 890cbaa73..000000000 --- a/plugins/org.eclipse.wst.server.ui/serverui/org/eclipse/wst/server/ui/internal/audio/XMLMemento.java +++ /dev/null @@ -1,219 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2003, 2007 IBM Corporation and others. - * All rights reserved. This program and the accompanying materials - * are made available under the terms of the Eclipse Public License v1.0 - * which accompanies this distribution, and is available at - * http://www.eclipse.org/legal/epl-v10.html - * - * Contributors: - * IBM Corporation - Initial API and implementation - *******************************************************************************/ -package org.eclipse.wst.server.ui.internal.audio; - -import java.io.*; -import java.util.*; -import org.w3c.dom.*; -import org.xml.sax.*; -import javax.xml.parsers.*; -import javax.xml.transform.*; -import javax.xml.transform.dom.DOMSource; -import javax.xml.transform.stream.StreamResult; -/** - * A Memento is a class independent container for persistence - * info. It is a reflection of 3 storage requirements. - * - * 1) We need the ability to persist an object and restore it. - * 2) The class for an object may be absent. If so we would - * like to skip the object and keep reading. - * 3) The class for an object may change. If so the new class - * should be able to read the old persistence info. - * - * We could ask the objects to serialize themselves into an - * ObjectOutputStream, DataOutputStream, or Hashtable. However - * all of these approaches fail to meet the second requirement. - * - * Memento supports binary persistence with a version ID. - */ -public final class XMLMemento implements IMemento { - private Document factory; - private Element element; - - /** - * Answer a memento for the document and element. For simplicity - * you should use createReadRoot and createWriteRoot to create the initial - * mementos on a document. - */ - private XMLMemento(Document doc, Element el) { - factory = doc; - element = el; - } - - /* - * @see IMemento - */ - public IMemento createChild(String type) { - Element child = factory.createElement(type); - element.appendChild(child); - return new XMLMemento(factory, child); - } - - /** - * Create a Document from a Reader and answer a root memento for reading - * a document. - */ - protected static XMLMemento createReadRoot(Reader reader) { - Document document = null; - try { - DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); - DocumentBuilder parser = factory.newDocumentBuilder(); - document = parser.parse(new InputSource(reader)); - Node node = document.getFirstChild(); - if (node instanceof Element) - return new XMLMemento(document, (Element) node); - } catch (Exception e) { - // ignore - } - return null; - } - - /** - * Answer a root memento for writing a document. - * - * @param type a type - * @return a memento - */ - protected static XMLMemento createWriteRoot(String type) { - Document document; - try { - document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument(); - Element element = document.createElement(type); - document.appendChild(element); - return new XMLMemento(document, element); - } catch (ParserConfigurationException e) { - throw new Error(e); - } - } - - /* - * @see IMemento - */ - public IMemento getChild(String type) { - - // Get the nodes. - NodeList nodes = element.getChildNodes(); - int size = nodes.getLength(); - if (size == 0) - return null; - - // Find the first node which is a child of this node. - for (int nX = 0; nX < size; nX ++) { - Node node = nodes.item(nX); - if (node instanceof Element) { - Element element2 = (Element)node; - if (element2.getNodeName().equals(type)) - return new XMLMemento(factory, element2); - } - } - - // A child was not found. - return null; - } - - /* - * @see IMemento - */ - public IMemento [] getChildren(String type) { - - // Get the nodes. - NodeList nodes = element.getChildNodes(); - int size = nodes.getLength(); - if (size == 0) - return new IMemento[0]; - - // Extract each node with given type. - List<Element> list = new ArrayList<Element>(size); - for (int nX = 0; nX < size; nX ++) { - Node node = nodes.item(nX); - if (node instanceof Element) { - Element element2 = (Element)node; - if (element2.getNodeName().equals(type)) - list.add(element2); - } - } - - // Create a memento for each node. - size = list.size(); - IMemento [] results = new IMemento[size]; - for (int x = 0; x < size; x ++) { - results[x] = new XMLMemento(factory, list.get(x)); - } - return results; - } - - /* - * @see IMemento - */ - public String getString(String key) { - Attr attr = element.getAttributeNode(key); - if (attr == null) - return null; - return attr.getValue(); - } - - /** - * Loads a memento from the given filename. - * - * @param in java.io.InputStream - * @return org.eclipse.ui.IMemento - */ - public static IMemento loadMemento(InputStream in) { - Document document = null; - try { - DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); - DocumentBuilder parser = factory.newDocumentBuilder(); - document = parser.parse(in); - Node node = document.getFirstChild(); - if (node instanceof Element) - return new XMLMemento(document, (Element) node); - } catch (Exception e) { - // ignore - } finally { - try { - in.close(); - } catch (Exception e) { - // ignore - } - } - return null; - } - - /* - * @see IMemento - */ - public void putString(String key, String value) { - if (value == null) - return; - element.setAttribute(key, value); - } - - /** - * Save this Memento to a Writer. - */ - protected void save(OutputStream os) throws IOException { - Result result = new StreamResult(os); - Source source = new DOMSource(factory); - try { - Transformer transformer = TransformerFactory.newInstance().newTransformer(); - transformer.setOutputProperty(OutputKeys.INDENT, "yes"); //$NON-NLS-1$ - transformer.setOutputProperty(OutputKeys.METHOD, "xml"); //$NON-NLS-1$ - transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); //$NON-NLS-1$ - transformer.transform(source, result); - } - catch (TransformerConfigurationException e) { - throw (IOException) (new IOException().initCause(e)); - } - catch (TransformerException e) { - throw (IOException) (new IOException().initCause(e)); - } - } -}
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