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/*******************************************************************************
* Copyright (c) 2002, 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
* 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;
}
}
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