org.eclipse.wst.common.snippets/src/org/eclipse/wst/common/snippets/internal/ui/EntryDeserializer.java - webtools-common/webtools.common.snippets - Git at Google

 /*******************************************************************************
  * Copyright (c) 2004, 2005 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.common.snippets.internal.ui;

 import java.io.ByteArrayInputStream;
 import java.io.IOException;

 import org.eclipse.wst.common.snippets.core.ISnippetVariable;
 import org.eclipse.wst.common.snippets.core.ISnippetsEntry;
 import org.eclipse.wst.common.snippets.internal.Logger;
 import org.eclipse.wst.common.snippets.internal.SnippetsPlugin;
 import org.eclipse.wst.common.snippets.internal.palette.SnippetPaletteItem;
 import org.eclipse.wst.common.snippets.internal.palette.SnippetVariable;
 import org.eclipse.wst.common.snippets.internal.util.CommonXML;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
 import org.xml.sax.InputSource;
 import org.xml.sax.SAXException;


 public class EntryDeserializer {
 	private static EntryDeserializer reader = null;

 	public synchronized static EntryDeserializer getInstance() {
 		// cached definitions will be out of sync once new definitions are
 		// written to disk
 		reader = new EntryDeserializer();
 		return reader;
 	}

 	private EntryDeserializer() {
 		super();
 	}

 	private void assignEntryProperties(Element element, SnippetPaletteItem entry) {
 		entry.setId(element.getAttribute(SnippetsPlugin.NAMES.ID));
 		entry.setIconName(element.getAttribute(SnippetsPlugin.NAMES.SMALLICON));
 		String description = createDescription(element);
 		String label = element.getAttribute(SnippetsPlugin.NAMES.LABEL);
 		if ((label == null || label.length() == 0) && description != null) {
 			label = description;
 			description = ""; //$NON-NLS-1$
 		}
 		entry.setDescription(description);
 		entry.setLabel(label);
 	}

 	private String createContent(Node item) {
 		return readCDATAofChild(item, SnippetsPlugin.NAMES.CONTENT);
 	}

 	private String createDescription(Node entryElement) {
 		return readCDATAofChild(entryElement, SnippetsPlugin.NAMES.DESCRIPTION);
 	}

 	private SnippetPaletteItem createItem(Element element) {
 		SnippetPaletteItem item = new SnippetPaletteItem(element.getAttribute(SnippetsPlugin.NAMES.ID));
 		assignEntryProperties(element, item);
 		item.setContentString(createContent(element));
 		item.setCategoryName(element.getAttribute(SnippetsPlugin.NAMES.CATEGORY));
 		item.setClassName(element.getAttribute(SnippetsPlugin.NAMES.CLASSNAME));
 		item.setEditorClassName(element.getAttribute(SnippetsPlugin.NAMES.EDITORCLASSNAME));
 		NodeList children = element.getChildNodes();
 		int length = children.getLength();
 		for (int i = 0; i < length; i++) {
 			Node child = children.item(i);
 			if (child.getNodeType() == Node.ELEMENT_NODE && child.getNodeName().equals(SnippetsPlugin.NAMES.VARIABLE)) {
 				ISnippetVariable var = createVariable((Element) child);
 				if (var != null)
 					item.addVariable(var);
 			}
 		}
 		if (Logger.DEBUG_DEFINITION_PERSISTENCE)
 			System.out.println("User item reader creating item " + item.getId()); //$NON-NLS-1$
 		return item;
 	}

 	private ISnippetVariable createVariable(Element element) {
 		SnippetVariable var = new SnippetVariable();
 		var.setId(element.getAttribute(SnippetsPlugin.NAMES.ID));
 		var.setName(element.getAttribute(SnippetsPlugin.NAMES.NAME));
 		var.setDescription(createDescription(element));
 		var.setDefaultValue(element.getAttribute(SnippetsPlugin.NAMES.DEFAULT));
 		return var;
 	}

 	public ISnippetsEntry fromXML(byte[] xml) {
 		ISnippetsEntry entry = null;
 		try {
 			Document document = CommonXML.getDocumentBuilder().parse(new InputSource(new ByteArrayInputStream(xml)));
 			Element el = document.getDocumentElement();
 			if (el != null && el.hasChildNodes()) {
 				Node child = el.getFirstChild();
 				while (child.getNodeType() != Node.ELEMENT_NODE)
 					child = child.getNextSibling();
 				if (child.getNodeName().equals(SnippetsPlugin.NAMES.ITEM)) {
 					SnippetPaletteItem item = createItem((Element) child);
 					item.setCategoryName(null);
 					item.setCategory(null);
 					item.setClassName(null);
 					item.setEditorClassName(null);
 					item.setIconName(null);
 					entry = item;
 				}
 				else if (child.getNodeName().equals(SnippetsPlugin.NAMES.CATEGORY)) {
 				}
 			}
 		}
 		catch (SAXException e) {
 		}
 		catch (IOException e) {
 		}
 		return entry;
 	}

 	/**
 	 * Extracts the contents of a CDATA section arranged like this:
 	 *
 	 * <node><otherChild/><childName><wrong element/> <![CDATA[ RETURNED
 	 * TEXT]]> </childName> </node>
 	 */
 	private String readCDATAofChild(Node node, String childName) {
 		NodeList children = node.getChildNodes();
 		for (int i = 0; i < children.getLength(); i++) {
 			Node child = children.item(i);
 			if (child.getNodeType() == Node.ELEMENT_NODE && child.getNodeName().equals(childName)) {
 				NodeList descriptionChildren = child.getChildNodes();
 				for (int j = 0; j < descriptionChildren.getLength(); j++) {
 					Node descriptionChild = descriptionChildren.item(j);
 					if (descriptionChild.getNodeType() == Node.CDATA_SECTION_NODE) {
 						String value = descriptionChild.getNodeValue();
 						if (value != null)
 							return value;
 					}
 				}
 				return ""; //$NON-NLS-1$
 			}
 		}
 		return ""; //$NON-NLS-1$
 	}

 	//
 	// protected void assignPluginRecordFor(ISnippetsEntry entry, Element
 	// owningElement) {
 	// if (entry.getPluginRecord() != null) {
 	// owningElement.setAttribute(SnippetsPlugin.NAMES.PLUGIN,
 	// entry.getPluginRecord().getPluginName());
 	// owningElement.setAttribute(SnippetsPlugin.NAMES.VERSION,
 	// entry.getPluginRecord().getPluginVersion());
 	// }
 	// }
 	//
 	// protected Element createCategory(Document doc, ISnippetCategory
 	// category) {
 	// Element element = doc.createElement(SnippetsPlugin.NAMES.CATEGORY);
 	// assignEntryProperties(category, element);
 	// assignPluginRecordFor(category, element);
 	// for (int i = 0; i < category.getChildren().size(); i++) {
 	// ISnippetItem item = (ISnippetItem) category.getChildren().get(i);
 	// Element child = createItem(doc, item);
 	// element.appendChild(child);
 	// }
 	// return element;
 	// }
 	//
 	// protected Element createContent(Document doc, ISnippetItem item) {
 	// Element element = doc.createElement(SnippetsPlugin.NAMES.CONTENT);
 	// element.appendChild(doc.createCDATASection(item.getContentString()));
 	// return element;
 	// }
 	//
 	// protected String readDescription(Element parent) {
 	// return "";
 	// }
 	//
 	// protected Document createDocument(SnippetDefinitions defs) {
 	// Document document =
 	// CommonXML.getDocumentBuilder().getDOMImplementation().createDocument(null,
 	// SnippetsPlugin.NAMES.SNIPPETS, null);
 	// Element root = document.getDocumentElement();
 	// for (int i = 0; i < defs.getKnownPlugins().size(); i++) {
 	// PluginRecord record = (PluginRecord) defs.getKnownPlugins().get(i);
 	// root.appendChild(createPluginRecord(document, record));
 	// }
 	// for (int i = 0; i < defs.getCategories().size(); i++) {
 	// ISnippetCategory category = (ISnippetCategory)
 	// defs.getCategories().get(i);
 	// Element categoryElement = createCategory(document, category);
 	// root.appendChild(categoryElement);
 	// }
 	// return document;
 	// }
 	//
 	// protected Element createItem(Document doc, ISnippetItem item) {
 	// Element element = doc.createElement(SnippetsPlugin.NAMES.ITEM);
 	// assignEntryProperties(item, element);
 	// assignPluginRecordFor(item, element);
 	// element.setAttribute(SnippetsPlugin.NAMES.CATEGORY,
 	// item.getCategory().getId());
 	// element.setAttribute(SnippetsPlugin.NAMES.CLASSNAME,
 	// item.getClassName());
 	// element.setAttribute(SnippetsPlugin.NAMES.EDITORCLASSNAME,
 	// item.getEditorClassName());
 	// element.appendChild(createContent(doc, item));
 	// for (int i = 0; i < item.getVariables().size(); i++) {
 	// Element variable = createVariable(doc, (ISnippetVariable)
 	// item.getVariables().get(i));
 	// element.appendChild(variable);
 	// }
 	// return element;
 	// }
 	//
 	// protected Element createPluginRecord(Document doc, PluginRecord record)
 	// {
 	// Element element = doc.createElement(SnippetsPlugin.NAMES.PLUGIN);
 	// element.setAttribute(SnippetsPlugin.NAMES.NAME,
 	// record.getPluginName());
 	// element.setAttribute(SnippetsPlugin.NAMES.VERSION,
 	// record.getPluginVersion());
 	// return element;
 	// }
 	//
 	// protected Element createVariable(Document doc, ISnippetVariable
 	// variable) {
 	// Element element = doc.createElement(SnippetsPlugin.NAMES.VARIABLE);
 	// element.setAttribute(SnippetsPlugin.NAMES.ID, variable.getId());
 	// element.setAttribute(SnippetsPlugin.NAMES.DEFAULT,
 	// variable.getDefaultValue());
 	// element.appendChild(createDescription(doc, variable.getDescription()));
 	// return element;
 	// }

 }
	/*******************************************************************************
	* Copyright (c) 2004, 2005 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.common.snippets.internal.ui;

	import java.io.ByteArrayInputStream;
	import java.io.IOException;

	import org.eclipse.wst.common.snippets.core.ISnippetVariable;
	import org.eclipse.wst.common.snippets.core.ISnippetsEntry;
	import org.eclipse.wst.common.snippets.internal.Logger;
	import org.eclipse.wst.common.snippets.internal.SnippetsPlugin;
	import org.eclipse.wst.common.snippets.internal.palette.SnippetPaletteItem;
	import org.eclipse.wst.common.snippets.internal.palette.SnippetVariable;
	import org.eclipse.wst.common.snippets.internal.util.CommonXML;
	import org.w3c.dom.Document;
	import org.w3c.dom.Element;
	import org.w3c.dom.Node;
	import org.w3c.dom.NodeList;
	import org.xml.sax.InputSource;
	import org.xml.sax.SAXException;


	public class EntryDeserializer {
	private static EntryDeserializer reader = null;

	public synchronized static EntryDeserializer getInstance() {
	// cached definitions will be out of sync once new definitions are
	// written to disk
	reader = new EntryDeserializer();
	return reader;
	}

	private EntryDeserializer() {
	super();
	}

	private void assignEntryProperties(Element element, SnippetPaletteItem entry) {
	entry.setId(element.getAttribute(SnippetsPlugin.NAMES.ID));
	entry.setIconName(element.getAttribute(SnippetsPlugin.NAMES.SMALLICON));
	String description = createDescription(element);
	String label = element.getAttribute(SnippetsPlugin.NAMES.LABEL);
	if ((label == null \|\| label.length() == 0) && description != null) {
	label = description;
	description = ""; //$NON-NLS-1$
	}
	entry.setDescription(description);
	entry.setLabel(label);
	}

	private String createContent(Node item) {
	return readCDATAofChild(item, SnippetsPlugin.NAMES.CONTENT);
	}

	private String createDescription(Node entryElement) {
	return readCDATAofChild(entryElement, SnippetsPlugin.NAMES.DESCRIPTION);
	}

	private SnippetPaletteItem createItem(Element element) {
	SnippetPaletteItem item = new SnippetPaletteItem(element.getAttribute(SnippetsPlugin.NAMES.ID));
	assignEntryProperties(element, item);
	item.setContentString(createContent(element));
	item.setCategoryName(element.getAttribute(SnippetsPlugin.NAMES.CATEGORY));
	item.setClassName(element.getAttribute(SnippetsPlugin.NAMES.CLASSNAME));
	item.setEditorClassName(element.getAttribute(SnippetsPlugin.NAMES.EDITORCLASSNAME));
	NodeList children = element.getChildNodes();
	int length = children.getLength();
	for (int i = 0; i < length; i++) {
	Node child = children.item(i);
	if (child.getNodeType() == Node.ELEMENT_NODE && child.getNodeName().equals(SnippetsPlugin.NAMES.VARIABLE)) {
	ISnippetVariable var = createVariable((Element) child);
	if (var != null)
	item.addVariable(var);
	}
	}
	if (Logger.DEBUG_DEFINITION_PERSISTENCE)
	System.out.println("User item reader creating item " + item.getId()); //$NON-NLS-1$
	return item;
	}

	private ISnippetVariable createVariable(Element element) {
	SnippetVariable var = new SnippetVariable();
	var.setId(element.getAttribute(SnippetsPlugin.NAMES.ID));
	var.setName(element.getAttribute(SnippetsPlugin.NAMES.NAME));
	var.setDescription(createDescription(element));
	var.setDefaultValue(element.getAttribute(SnippetsPlugin.NAMES.DEFAULT));
	return var;
	}

	public ISnippetsEntry fromXML(byte[] xml) {
	ISnippetsEntry entry = null;
	try {
	Document document = CommonXML.getDocumentBuilder().parse(new InputSource(new ByteArrayInputStream(xml)));
	Element el = document.getDocumentElement();
	if (el != null && el.hasChildNodes()) {
	Node child = el.getFirstChild();
	while (child.getNodeType() != Node.ELEMENT_NODE)
	child = child.getNextSibling();
	if (child.getNodeName().equals(SnippetsPlugin.NAMES.ITEM)) {
	SnippetPaletteItem item = createItem((Element) child);
	item.setCategoryName(null);
	item.setCategory(null);
	item.setClassName(null);
	item.setEditorClassName(null);
	item.setIconName(null);
	entry = item;
	}
	else if (child.getNodeName().equals(SnippetsPlugin.NAMES.CATEGORY)) {
	}
	}
	}
	catch (SAXException e) {
	}
	catch (IOException e) {
	}
	return entry;
	}

	/**
	* Extracts the contents of a CDATA section arranged like this:
	*
	* <node><otherChild/><childName><wrong element/> <![CDATA[ RETURNED
	* TEXT]]> </childName> </node>
	*/
	private String readCDATAofChild(Node node, String childName) {
	NodeList children = node.getChildNodes();
	for (int i = 0; i < children.getLength(); i++) {
	Node child = children.item(i);
	if (child.getNodeType() == Node.ELEMENT_NODE && child.getNodeName().equals(childName)) {
	NodeList descriptionChildren = child.getChildNodes();
	for (int j = 0; j < descriptionChildren.getLength(); j++) {
	Node descriptionChild = descriptionChildren.item(j);
	if (descriptionChild.getNodeType() == Node.CDATA_SECTION_NODE) {
	String value = descriptionChild.getNodeValue();
	if (value != null)
	return value;
	}
	}
	return ""; //$NON-NLS-1$
	}
	}
	return ""; //$NON-NLS-1$
	}

	//
	// protected void assignPluginRecordFor(ISnippetsEntry entry, Element
	// owningElement) {
	// if (entry.getPluginRecord() != null) {
	// owningElement.setAttribute(SnippetsPlugin.NAMES.PLUGIN,
	// entry.getPluginRecord().getPluginName());
	// owningElement.setAttribute(SnippetsPlugin.NAMES.VERSION,
	// entry.getPluginRecord().getPluginVersion());
	// }
	// }
	//
	// protected Element createCategory(Document doc, ISnippetCategory
	// category) {
	// Element element = doc.createElement(SnippetsPlugin.NAMES.CATEGORY);
	// assignEntryProperties(category, element);
	// assignPluginRecordFor(category, element);
	// for (int i = 0; i < category.getChildren().size(); i++) {
	// ISnippetItem item = (ISnippetItem) category.getChildren().get(i);
	// Element child = createItem(doc, item);
	// element.appendChild(child);
	// }
	// return element;
	// }
	//
	// protected Element createContent(Document doc, ISnippetItem item) {
	// Element element = doc.createElement(SnippetsPlugin.NAMES.CONTENT);
	// element.appendChild(doc.createCDATASection(item.getContentString()));
	// return element;
	// }
	//
	// protected String readDescription(Element parent) {
	// return "";
	// }
	//
	// protected Document createDocument(SnippetDefinitions defs) {
	// Document document =
	// CommonXML.getDocumentBuilder().getDOMImplementation().createDocument(null,
	// SnippetsPlugin.NAMES.SNIPPETS, null);
	// Element root = document.getDocumentElement();
	// for (int i = 0; i < defs.getKnownPlugins().size(); i++) {
	// PluginRecord record = (PluginRecord) defs.getKnownPlugins().get(i);
	// root.appendChild(createPluginRecord(document, record));
	// }
	// for (int i = 0; i < defs.getCategories().size(); i++) {
	// ISnippetCategory category = (ISnippetCategory)
	// defs.getCategories().get(i);
	// Element categoryElement = createCategory(document, category);
	// root.appendChild(categoryElement);
	// }
	// return document;
	// }
	//
	// protected Element createItem(Document doc, ISnippetItem item) {
	// Element element = doc.createElement(SnippetsPlugin.NAMES.ITEM);
	// assignEntryProperties(item, element);
	// assignPluginRecordFor(item, element);
	// element.setAttribute(SnippetsPlugin.NAMES.CATEGORY,
	// item.getCategory().getId());
	// element.setAttribute(SnippetsPlugin.NAMES.CLASSNAME,
	// item.getClassName());
	// element.setAttribute(SnippetsPlugin.NAMES.EDITORCLASSNAME,
	// item.getEditorClassName());
	// element.appendChild(createContent(doc, item));
	// for (int i = 0; i < item.getVariables().size(); i++) {
	// Element variable = createVariable(doc, (ISnippetVariable)
	// item.getVariables().get(i));
	// element.appendChild(variable);
	// }
	// return element;
	// }
	//
	// protected Element createPluginRecord(Document doc, PluginRecord record)
	// {
	// Element element = doc.createElement(SnippetsPlugin.NAMES.PLUGIN);
	// element.setAttribute(SnippetsPlugin.NAMES.NAME,
	// record.getPluginName());
	// element.setAttribute(SnippetsPlugin.NAMES.VERSION,
	// record.getPluginVersion());
	// return element;
	// }
	//
	// protected Element createVariable(Document doc, ISnippetVariable
	// variable) {
	// Element element = doc.createElement(SnippetsPlugin.NAMES.VARIABLE);
	// element.setAttribute(SnippetsPlugin.NAMES.ID, variable.getId());
	// element.setAttribute(SnippetsPlugin.NAMES.DEFAULT,
	// variable.getDefaultValue());
	// element.appendChild(createDescription(doc, variable.getDescription()));
	// return element;
	// }

	}