| /******************************************************************************* |
| * Copyright (c) 2002 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 |
| * Jens Lukowski/Innoopract - initial renaming/restructuring |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.xml.core.internal.contentmodel.util; |
| |
| import java.util.ArrayList; |
| import java.util.Hashtable; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Vector; |
| |
| import org.eclipse.wst.xml.core.internal.contentmodel.CMDocument; |
| |
| |
| |
| /** |
| * |
| */ |
| public class CMDocumentCache |
| { |
| public static final int STATUS_NOT_LOADED = 0; |
| public static final int STATUS_LOADING = 2; |
| public static final int STATUS_LOADED = 3; |
| public static final int STATUS_ERROR = 4; |
| |
| protected class Entry |
| { |
| public String uri; |
| public int status = STATUS_NOT_LOADED; |
| public float progress; |
| public CMDocument cmDocument; |
| |
| public Entry(String uri) |
| { |
| this.uri = uri; |
| } |
| |
| public Entry(String uri, int status, CMDocument cmDocument) |
| { |
| this.uri = uri; |
| this.status = status; |
| this.cmDocument = cmDocument; |
| } |
| } |
| |
| protected Hashtable hashtable; |
| protected List listenerList = new Vector(); |
| |
| |
| /** |
| * temporarily public until caching problem is solved |
| */ |
| public CMDocumentCache() |
| { |
| hashtable = new Hashtable(); |
| } |
| |
| public void addListener(CMDocumentCacheListener listener) |
| { |
| listenerList.add(listener); |
| } |
| |
| public void removeListener(CMDocumentCacheListener listener) |
| { |
| listenerList.remove(listener); |
| } |
| |
| /** |
| * |
| */ |
| public CMDocument getCMDocument(String grammarURI) |
| { |
| CMDocument result = null; |
| if (grammarURI != null) |
| { |
| Entry entry = (Entry)hashtable.get(grammarURI); |
| if (entry != null) |
| { |
| result = entry.cmDocument; |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * |
| */ |
| public int getStatus(String grammarURI) |
| { |
| int result = STATUS_NOT_LOADED; |
| if (grammarURI != null) |
| { |
| Entry entry = (Entry)hashtable.get(grammarURI); |
| if (entry != null) |
| { |
| result = entry.status; |
| } |
| |
| } |
| return result; |
| } |
| |
| /** |
| * |
| */ |
| protected Entry lookupOrCreate(String grammarURI) |
| { |
| Entry entry = (Entry)hashtable.get(grammarURI); |
| if (entry == null) |
| { |
| entry = new Entry(grammarURI); |
| hashtable.put(grammarURI, entry); |
| } |
| return entry; |
| } |
| |
| |
| /** |
| * |
| */ |
| public void putCMDocument(String grammarURI, CMDocument cmDocument) |
| { |
| if (grammarURI != null && cmDocument != null) |
| { |
| Entry entry = lookupOrCreate(grammarURI); |
| int oldStatus = entry.status; |
| entry.status = STATUS_LOADED; |
| entry.cmDocument = cmDocument; |
| notifyCacheUpdated(grammarURI, oldStatus, entry.status, entry.cmDocument); |
| } |
| } |
| |
| /** |
| * |
| */ |
| public void setStatus(String grammarURI, int status) |
| { |
| if (grammarURI != null) |
| { |
| Entry entry = lookupOrCreate(grammarURI); |
| int oldStatus = entry.status; |
| entry.status = status; |
| notifyCacheUpdated(grammarURI, oldStatus, entry.status, entry.cmDocument); |
| } |
| } |
| |
| /** |
| * |
| */ |
| public void clear() |
| { |
| hashtable.clear(); |
| notifyCacheCleared(); |
| } |
| |
| /** |
| * |
| */ |
| protected void notifyCacheUpdated(String uri, int oldStatus, int newStatus, CMDocument cmDocument) |
| { |
| List list = new Vector(); |
| list.addAll(listenerList); |
| for (Iterator i = list.iterator(); i.hasNext(); ) |
| { |
| CMDocumentCacheListener listener = (CMDocumentCacheListener)i.next(); |
| listener.cacheUpdated(this, uri, oldStatus, newStatus, cmDocument); |
| } |
| } |
| |
| /** |
| * |
| */ |
| protected void notifyCacheCleared() |
| { |
| List list = new Vector(); |
| list.addAll(listenerList); |
| for (Iterator i = list.iterator(); i.hasNext(); ) |
| { |
| CMDocumentCacheListener listener = (CMDocumentCacheListener)i.next(); |
| listener.cacheCleared(this); |
| } |
| } |
| |
| public List getCMDocuments() |
| { |
| List list = new ArrayList(); |
| for (Iterator i = hashtable.values().iterator(); i.hasNext(); ) |
| { |
| Entry entry = (Entry)i.next(); |
| list.add(entry.cmDocument); |
| } |
| return list; |
| } |
| } |