Examples of org.apache.commons.collections.ReferenceMap$Entry

org.apache.commons.collections.ReferenceMap
sun.com/j2se/1.4/docs/api/java/util/WeakHashMap.html"> WeakHashMap. However, you can also specify hard keys and weak values, or any other combination. The default constructor uses hard keys and soft values, providing a memory-sensitive cache.
The algorithms used are basically the same as those in {@link java.util.HashMap}. In particular, you can specify a load factor and capacity to suit your needs. All optional {@link Map} operations are supported.
However, this {@link Map} implementation does notallow null elements. Attempting to add a null key or or a null value to the map will raise a NullPointerException.
As usual, this implementation is not synchronized. You can use {@link java.util.Collections#synchronizedMap} to provide synchronized access to a ReferenceMap. @see java.lang.ref.Reference @deprecated Moved to map subpackage. Due to be removed in v4.0. @since Commons Collections 2.1 @version $Revision: 1.22 $ $Date: 2004/02/18 01:15:42 $ @author Paul Jack

  }


  @Override
  protected void doDelete(HttpServletRequest req, HttpServletResponse resp)
      throws ServletException, IOException {
    Entry e = entry(req);
    S3Object remove = map.remove(e);
    if (remove == null) {
      resp.sendError(404, "Not found " + e);
    } else {
      resp.sendError(HttpURLConnection.HTTP_NO_CONTENT, "Deleted");

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    }


  }


  private Entry entry(HttpServletRequest req) {
    return new Entry(key(uri(req)));
  }

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        log("doGet " + uri);
    if ("/".equals(uri.getPath())) {
      list(req, resp);
    } else {
      String key = uri.getPath().substring(1);
      Entry e = new Entry(key);
      S3Object obj = map.get(e);
        if (debug)
          log("map.get(" + key + ") = " + obj);
      if (obj == null) {
        resp.sendError(404, "Not here: " + e);

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    if (maxKeysStr != null)
      maxKeys = Integer.parseInt(maxKeysStr);
    Writer w = new Writer();
    SortedMap<Entry, S3Object> submap = new TreeMap<Entry, S3Object>(map);
    if (prefix != null)
      submap = submap.tailMap(new Entry(prefix));
    int keyCount = 0;
    boolean truncated = false;
    String nextMarker = null;
    for (Entry e : submap.keySet()) {
      if (++keyCount > maxKeys) {

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    log("doPut " + uri);
    if ("/".equals(uri.getPath())) {
      log("create bucket");
      bucket = true;
    } else {
      Entry e = new Entry(key(uri));
      e.setLastModified(new Date());
      e.setSize(req.getContentLength());
      e.setOwner(new Owner("id", "name"));
      ByteArrayOutputStream os = new ByteArrayOutputStream();
      ServletInputStream is = req.getInputStream();
      byte b[] = new byte[128];
      while (true) {
        int len = is.read(b);

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    try
    {
      Object cacheKey = getGrammarPoolCacheKey();
      
      // we're using thread local caches to avoid thread safety problems
      ReferenceMap cacheMap = (ReferenceMap) GRAMMAR_POOL_CACHE.get();
      if (cacheMap == null)
      {
        cacheMap = new ReferenceMap(ReferenceMap.WEAK, ReferenceMap.SOFT);
        GRAMMAR_POOL_CACHE.set(cacheMap);
      }
      
      Object grammarPool = cacheMap.get(cacheKey);
      if (grammarPool == null)
      {
        if (log.isDebugEnabled())
        {
          log.debug("Instantiating grammar pool of type " + poolClassName
              + " for cache key " + cacheKey);
        }


        grammarPool = ClassUtils.instantiateClass(poolClassName, Object.class);
        cacheMap.put(cacheKey, grammarPool);
      }
      
      parser.setProperty(XERCES_PARSER_PROPERTY_GRAMMAR_POOL, grammarPool);
    }
    catch (Exception e)

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  {
    Object key = classCacheKey();
    Map contextMap = (Map) classCache.get(key);
    if (contextMap == null)
    {
      contextMap = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.SOFT);
      classCache.put(key, contextMap);
    }
    contextMap.put(className, loadedClass);
  }

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   * 
   * @param itf a interface or class that should be implemented by all classes cached by this object
   */
  public JRSingletonCache(Class itf)
  {
    cache = new ReferenceMap(ReferenceMap.WEAK, ReferenceMap.SOFT);
    this.itf = itf;
  }

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  {
    Object contextKey = getContextKey();
    Map contextCache = (Map) cache.get(contextKey);
    if (contextCache == null)
    {
      contextCache = new ReferenceMap();
      cache.put(contextKey, contextCache);
    }
    return contextCache;
  }

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   *            cache.
   */
  protected JRAbstractLRUVirtualizer(int maxSize)
  {
    this.pagedIn = new Cache(maxSize);
    this.pagedOut = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.WEAK);
    this.lastObject = null;


    this.lastObjectMap = new ReferenceMap(ReferenceMap.WEAK, ReferenceMap.WEAK);
    this.lastObjectSet = new ReferenceMap(ReferenceMap.WEAK, ReferenceMap.HARD);
  }

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