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PC World Komputer 1995 November
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browser
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documentmanager.java
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1995-08-11
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/*
* @(#)DocumentManager.java 1.22 95/03/14 Jonathan Payne
*
* Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software
* and its documentation for NON-COMMERCIAL purposes and without
* fee is hereby granted provided that this copyright notice
* appears in all copies. Please refer to the file "copyright.html"
* for further important copyright and licensing information.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
* THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
*/
package browser;
import java.util.*;
import net.www.html.URL;
import net.www.html.PostURL;
/**
* Class DocumentManager manages multiple html documents. It
* maintains a list of visited documents, and fetches ones which are
* not currently known. Instances of DocumentManager are created
* by WRWindow to manage the documents of that window. Documents are
* fetched in the background, and multiple documents may be fetched at
* the same time.<p>
* This class was never completed.
*
* @version 1.22, 14 Mar 1995
* @author Jonathan Payne
*/
public
class DocumentManager {
/** Document cache, indexed by URL. */
static Hashtable documentCache = new Hashtable();
/** Window we're managing documents for. */
WRWindow wrWindow;
DocumentManager(WRWindow w) {
wrWindow = w;
}
static public void unCacheDocument(URL url) {
documentCache.remove(url);
}
static public void cacheDocument(DocumentInfo info) {
URL url = info.url;
if (url.canCache() && info.canCache() && info.doc != null) {
documentCache.put(url, info.doc);
}
}
DocumentInfo newDocument(URL url) {
DocumentRef docRef = null;
DocumentInfo info;
if (url.canCache())
docRef = (DocumentRef) documentCache.get(url);
return new DocumentInfo(docRef, url);
}
}