/*******************************************************************************
* Copyright (c) 2004, 2005 Sybase, Inc. 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:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.jsf.facesconfig.ui.pageflow.util;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
import org.eclipse.emf.ecore.xmi.XMLResource;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.model.PageflowPage;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.model.Pageflow;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.model.PageflowFactory;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.model.PageflowNode;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.model.PageflowPackage;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.model.impl.PageflowPackageImpl;
/**
* Drives the model. Acts as the model entry point, including create, load, save
* operations.
*
* @author Xiao-guang Zhang
*/
public class PageflowModelManager {
/**
* In EMF, a resource provides the way to have access to the model content.
*/
private Resource resourcePageflow = null;
/**
* the path of current pageflow model resource provides the way to have
* access to the model content.
*/
private IPath pathPageflow = null;
/**
* Contains the factory associated with the model.
*/
private static PageflowFactory pageflowFactory = null;
/**
* Gives access to the top level pageflow contained in the resource.
*/
private Pageflow pageflow = null;
/**
* resource set
*/
private ResourceSet resourceSet = null;
/** unicode encoding UTF-8 support */
private static HashMap defaultSaveOptions = new HashMap();
static {
defaultSaveOptions.put(XMLResource.OPTION_ENCODING, "UTF-8"); //$NON-NLS-1$
}
/**
* Uses lazy initialization.
*
* @param path -
* pageflow file name
* @return the resource containing the pageflow
*/
public Resource getResource(IPath path) {
if (resourcePageflow == null) {
pathPageflow = path;
ResourceSet resSet = getResourceSet();
resourcePageflow = resSet.getResource(URI.createPlatformResourceURI(path
.toString(), false), true);
}
return resourcePageflow;
}
/**
*
* @return the top level pageflow model
*/
public Pageflow getModel() {
if (null == pageflow) {
EList l = resourcePageflow.getContents();
Iterator i = l.iterator();
while (i.hasNext()) {
Object o = i.next();
if (o instanceof Pageflow) {
pageflow = (Pageflow) o;
}
}
}
return pageflow;
}
/**
* Creates a resource to contain the network. The resource file does not
* exist yet.
*
* @param path
* @return
*/
private Resource createResource(IPath path) {
if (resourcePageflow == null) {
pathPageflow = path;
ResourceSet resSet = getResourceSet();
resourcePageflow = resSet.createResource(URI.createPlatformResourceURI(path
.toString(), false));
}
return resourcePageflow;
}
/**
* Returns the resource set.
*
* @param
* @return
*/
private ResourceSet getResourceSet() {
if (null == resourceSet) {
// Initialize the pageflow package, this line can not be removed.
PageflowPackageImpl.init();
// Register the XML resource factory for the .pageflow extension
Resource.Factory.Registry reg = Resource.Factory.Registry.INSTANCE;
Map regMap = reg.getExtensionToFactoryMap();
// m.put("pageflow", new XMIResourceFactoryImpl());
regMap.put("pageflow", new PageflowResourceFactoryImpl()); //$NON-NLS-1$
resourceSet = new ResourceSetImpl();
}
return resourceSet;
}
/**
* Returns the factory associated with the model. Object creation are made
* through that factory.
*
* @return - pageflow factory
*/
static public PageflowFactory getFactory() {
if (pageflowFactory == null) {
// Access the factory (needed to create instances)
Map registry = EPackage.Registry.INSTANCE;
String pageflowURI = PageflowPackage.eNS_URI;
PageflowPackage pageflowPackage = (PageflowPackage) registry
.get(pageflowURI);
pageflowFactory = pageflowPackage.getPageflowFactory();
}
return pageflowFactory;
}
/**
* Creates a new pageflow model with begin and end nodes.
*
* @param path -
* the new pageflow file name
* @return - new pageflow model
*/
public Pageflow createPageflow(IPath path) {
createResource(path);
// Create a new pageflow model
Map registry = EPackage.Registry.INSTANCE;
String pageflowURI = PageflowPackage.eNS_URI;
PageflowPackage nPackage = (PageflowPackage) registry.get(pageflowURI);
PageflowFactory nFactory = nPackage.getPageflowFactory();
pageflow = nFactory.createPageflow();
resourcePageflow.getContents().add(pageflow);
return pageflow;
}
/**
* Loads the content of the model from the file.
*
* @param path
*/
public void load(IPath path) {
getResource(path);
}
/**
* reloads the content of the model from the file.
*
* @param path
*/
public void reload(IPath path) {
getResource(path).unload();
load(path);
}
/**
* Saves the content of the model to the file.
*
* @param path
* @throws IOException
*/
public void save(final IPath path) throws IOException {
if (!pathPageflow.toString().equalsIgnoreCase(path.toString())) {
pathPageflow = path;
URI fileURI = URI.createPlatformResourceURI(path.toString(), false);
resourcePageflow.setURI(fileURI);
}
resourcePageflow.save(defaultSaveOptions);
}
/**
* get the file path of current pageflow resource
*
* @return - the file path
*/
public IPath getPath() {
return pathPageflow;
}
/**
* @param webPath
* @return found page node according the web path.
*/
public PageflowPage foundPage(String webPath) {
PageflowPage page = null;
if (getModel() != null) {
Iterator iterNodes = getModel().getNodes().iterator();
while (iterNodes.hasNext()) {
PageflowNode node = (PageflowNode) iterNodes.next();
if (node instanceof PageflowPage) {
if (((PageflowPage) node).getPath().equalsIgnoreCase(webPath)) {
page = (PageflowPage) node;
break;
}
}
}
}
return page;
}
/**
*
* Build a path for the resource in the .metadata directory given the path
* of the model resource. For example, given a model resource path of
* \test\folder\filename.ext the resulting Pageflow path name will be
* \test\.metadata\folder\filename.pageflow
*
* @param pathFacesConfig -
* faces-config file path.
*
* @return the ipath
*/
public static IPath makePageflowPath(IPath pathFacesConfig) {
IPath pageflowPath;
String[] segs = pathFacesConfig.removeFileExtension().segments();
pageflowPath = new Path(segs[0]).makeAbsolute();
pageflowPath = pageflowPath.append(".metadata"); //$NON-NLS-1$
for (int i = 1; i < segs.length; i++) {
pageflowPath = pageflowPath.append(segs[i]);
}
// pageflowPath.removeFileExtension();
pageflowPath = pageflowPath.addFileExtension("pageflow"); //$NON-NLS-1$
return pageflowPath;
}
}