jsf/plugins/org.eclipse.jst.jsf.core/src/org/eclipse/jst/jsf/core/internal/jsflibraryconfig/JSFLibraryConfigPersistData.java

/*******************************************************************************
 * Copyright (c) 2006 Oracle Corporation.
 * 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:
 *    Justin Chen - development check in
 *******************************************************************************/
package org.eclipse.jst.jsf.core.internal.jsflibraryconfig;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.QualifiedName;
import org.eclipse.jst.jsf.core.internal.JSFCorePlugin;
import org.eclipse.jst.jsf.core.internal.jsflibraryregistry.JSFLibrary;
import org.eclipse.jst.jsf.core.internal.jsflibraryregistry.JSFLibraryRegistry;
import org.eclipse.jst.jsf.core.internal.project.facet.JSFUtils;

/**
 * This class is responsible for persist and retore 
 * the configuration data for <b>JSFLibraryConfigControl</b>.  
 *  
 * @author Justin Chen - Oracle
 *
 */
public class JSFLibraryConfigPersistData {
	final protected static String SPTR_TUPLE = ":"; //$NON-NLS-1$
	final protected static String EO_TUPLE = ";"; //$NON-NLS-1$
	
	private IProject project;
	private JSFLibraryRegistry jsfLibReg;
	private JSFLibraryDecorator selJSFLibImpl = null;
	private List selJSFLibComp = null;
	
 	/**
 	 * @param project
 	 */
 	protected JSFLibraryConfigPersistData(IProject project) {
		this.project = project;	
		this.jsfLibReg = JSFCorePlugin.getDefault().getJSFLibraryRegistry();
	}
 	
	/**
	 * @return JSFLibraryDecorator
	 */
	protected JSFLibraryDecorator getSelectedJSFLibImplementation() {
		
		try {			
			if ( selJSFLibImpl == null ) {
				String strImplLibs = ((IResource)project).getPersistentProperty(new QualifiedName("", JSFUtils.PP_JSF_IMPLEMENTATION_LIBRARIES));				
				selJSFLibImpl = getSelectedJSFLibImpl(getTuples(strImplLibs));
			}
		} catch (CoreException e) {
			if (JSFCorePlugin.getDefault().getJSFLibraryRegistry() != null) {
				JSFLibrary jsfLib = JSFCorePlugin.getDefault().getJSFLibraryRegistry().getDefaultImplementation();
				if (jsfLib != null) {
					selJSFLibImpl = new JSFLibraryDecorator(jsfLib, true, true);
				} 
			} else {
				JSFCorePlugin.getDefault().getMsgLogger().log(e);
			}
		}
		return selJSFLibImpl;
		
	}
	
	/**
	 * @return List
	 */
	protected List getSelectedJSFLibComponent() {	
		
		try {
			if ( selJSFLibComp == null ) {
				selJSFLibComp = new ArrayList(Collections.EMPTY_LIST);
				String strCompLibs = ((IResource)project).getPersistentProperty(new QualifiedName("", JSFUtils.PP_JSF_COMPONENT_LIBRARIES));				
				initJSFCompLibs(getTuples(strCompLibs), selJSFLibComp);
			}		
		} catch (CoreException e) {
			JSFCorePlugin.getDefault().getMsgLogger().log(e);
		}
		return selJSFLibComp;
	}
	
	/**
	 * To persist configuration data as a project resource.
	 * 
	 * @param selJSFLibImpl
	 * @param selJSFLibComp
	 */
	protected void saveData(List selJSFLibImpl, List selJSFLibComp) {
		try {
			((IResource)project).setPersistentProperty(new QualifiedName("", JSFUtils.PP_JSF_IMPLEMENTATION_LIBRARIES), generatePersistString(selJSFLibImpl));
			((IResource)project).setPersistentProperty(new QualifiedName("", JSFUtils.PP_JSF_COMPONENT_LIBRARIES), generatePersistString(selJSFLibComp));
			
			this.selJSFLibImpl = null;
			this.selJSFLibComp = null;
			
		} catch (CoreException e) {
			JSFCorePlugin.getDefault().getMsgLogger().log(e);
		}
	}
	
	private JSFLibraryDecorator getSelectedJSFLibImpl(List jsfLibTuples) {
		Iterator itTuple = jsfLibTuples.iterator();
		while(itTuple.hasNext()) {
			Tuple tuple = (Tuple)itTuple.next();
			
			if ( jsfLibReg != null ) {			
				JSFLibrary jsfLib = jsfLibReg.getJSFLibraryByID(tuple.ID);				
				if (jsfLib != null) {
					return new JSFLibraryDecorator(jsfLib, tuple.selected, tuple.deploy);
				}
			} 
		}	
		return null;
	}
	
	private void initJSFCompLibs(List jsfLibTuples, List JSFCompLibs) {
		Iterator itTuple = jsfLibTuples.iterator();
		while(itTuple.hasNext()) {
			Tuple tuple = (Tuple)itTuple.next();
			
			if ( jsfLibReg != null ) {				
				JSFLibrary jsfLib = jsfLibReg.getJSFLibraryByID(tuple.ID);				
				if (jsfLib != null) {
					JSFLibraryDecorator newJSFLibDcrt = new JSFLibraryDecorator(jsfLib, tuple.selected, tuple.deploy);
					JSFCompLibs.add(newJSFLibDcrt);
				}			
			} 			
		}
	}
	
	private String generatePersistString(List list) {
		JSFLibraryDecorator jsfLibItem;
		StringBuffer sb = new StringBuffer();
		for (int i = 0; i < list.size(); i++) {
			jsfLibItem = (JSFLibraryDecorator)list.get(i);
			sb = sb.append(jsfLibItem.generatePersistString());
			sb.append(JSFLibraryConfigPersistData.EO_TUPLE);
		}
		return sb.toString();		
	}	
	
	private List getTuples(String strJSFLibs) {
		List list = new ArrayList(Collections.EMPTY_LIST);
		
		if (strJSFLibs != null) {
			String patternStr = JSFLibraryConfigPersistData.EO_TUPLE;
			String[] fields = strJSFLibs.split(patternStr);
			if (strJSFLibs.length() > 0) {
				Tuple tuple;
				for (int i = 0; i < fields.length; i++) {
					tuple = new Tuple(fields[i]);
					list.add(tuple);
				}
			}			
		}
		
		return list;
	}
	
	
	class Tuple {
		private String ID;
		private boolean selected = false;
		private boolean deploy = true;
		
		Tuple(String ID, boolean selected, boolean deploy) {
			this.ID = ID;
			this.selected = selected;
			this.deploy = deploy;
		}
		// parse tuple = ID:selected:deploy
		Tuple(String tuple) {
			String[] fields = tuple.split(JSFLibraryConfigPersistData.SPTR_TUPLE);
			this.ID = fields[0];
			this.selected = Boolean.valueOf(fields[1]).booleanValue();
			this.deploy = Boolean.valueOf(fields[2]).booleanValue();
		}
		
		String getID() {
			return ID;
		}
		
		boolean isSelected() {
			return selected;
		}
		
		boolean needDeploy() {
			return deploy;
		}		
	}

}