-/*******************************************************************************\r
- * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
- * in Industry THTH ry.\r
- * All rights reserved. This program and the accompanying materials\r
- * are made available under the terms of the Eclipse Public License v1.0\r
- * which accompanies this distribution, and is available at\r
- * http://www.eclipse.org/legal/epl-v10.html\r
- *\r
- * Contributors:\r
- * VTT Technical Research Centre of Finland - initial API and implementation\r
- *******************************************************************************/\r
-/*\r
- *\r
- * @author Toni Kalajainen\r
- */\r
-package org.simantics.utils.datastructures.cache;\r
-\r
-import java.util.HashMap;\r
-import java.util.Map;\r
-import java.util.Set;\r
-\r
-import org.simantics.utils.datastructures.disposable.AbstractDisposable;\r
-\r
-/**\r
- * CachedProvider provides values and stores the results in a cache.\r
- * Cached values must be explicitly released with clear, retain or remove.\r
- * Values are held with strong references.\r
- *\r
- * @param <K> the key\r
- * @param <V> the value\r
- */\r
-public class CachedMapProvider<K, V> extends AbstractDisposable implements IMapProvider<K, V> {\r
-\r
- private Map<K, V> cache;\r
- \r
- private final IMapProvider<K, V> provider;\r
- \r
- /**\r
- * Constructs new strong cache\r
- * \r
- * @param provider provider of values\r
- */\r
- public CachedMapProvider(IMapProvider<K, V> provider)\r
- {\r
- assert(provider!=null);\r
- this.provider = provider;\r
- this.cache = new HashMap<K, V>();\r
- } \r
-\r
- /**\r
- * Constructs new strong cache\r
- * \r
- * @param provider provider of values\r
- * @param cacheMap the map to use\r
- */\r
- public CachedMapProvider(IMapProvider<K, V> provider, Map<K, V> cacheMap)\r
- {\r
- assert(provider!=null);\r
- this.provider = provider;\r
- this.cache = cacheMap;\r
- } \r
- \r
- @Override\r
- public synchronized V get(K key) {\r
- assertNotDisposed();\r
- V value = cache.get(key);\r
- if (value!=null) return value;\r
- value = provider.get(key);\r
- assert(value!=null);\r
- cache.put(key, value); \r
- return value;\r
- }\r
- \r
- public synchronized void clear()\r
- {\r
- cache.clear();\r
- }\r
- \r
- public synchronized void retain(Set<K> keys)\r
- {\r
- cache.keySet().retainAll(keys);\r
- }\r
-\r
- public synchronized void remove(Set<K> keys)\r
- {\r
- cache.keySet().removeAll(keys);\r
- }\r
- \r
- public synchronized void load(Set<K> keys)\r
- {\r
- for (K key : keys)\r
- get(key);\r
- }\r
- \r
- public synchronized void addAll(CachedMapProvider<K, V> anotherCache)\r
- {\r
- assertNotDisposed();\r
- cache.putAll(anotherCache.cache);\r
- } \r
- \r
- public IMapProvider<K, V> getProvider() {\r
- return provider;\r
- }\r
- \r
- public synchronized Map<K, V> getAll()\r
- {\r
- assertNotDisposed();\r
- return new HashMap<K, V>(cache);\r
- }\r
-\r
- @Override\r
- protected void doDispose() {\r
- clear();\r
- }\r
- \r
-}\r
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * 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:
+ * VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+/*
+ *
+ * @author Toni Kalajainen
+ */
+package org.simantics.utils.datastructures.cache;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+import org.simantics.utils.datastructures.disposable.AbstractDisposable;
+
+/**
+ * CachedProvider provides values and stores the results in a cache.
+ * Cached values must be explicitly released with clear, retain or remove.
+ * Values are held with strong references.
+ *
+ * @param <K> the key
+ * @param <V> the value
+ */
+public class CachedMapProvider<K, V> extends AbstractDisposable implements IMapProvider<K, V> {
+
+ private Map<K, V> cache;
+
+ private final IMapProvider<K, V> provider;
+
+ /**
+ * Constructs new strong cache
+ *
+ * @param provider provider of values
+ */
+ public CachedMapProvider(IMapProvider<K, V> provider)
+ {
+ assert(provider!=null);
+ this.provider = provider;
+ this.cache = new HashMap<K, V>();
+ }
+
+ /**
+ * Constructs new strong cache
+ *
+ * @param provider provider of values
+ * @param cacheMap the map to use
+ */
+ public CachedMapProvider(IMapProvider<K, V> provider, Map<K, V> cacheMap)
+ {
+ assert(provider!=null);
+ this.provider = provider;
+ this.cache = cacheMap;
+ }
+
+ @Override
+ public synchronized V get(K key) {
+ assertNotDisposed();
+ V value = cache.get(key);
+ if (value!=null) return value;
+ value = provider.get(key);
+ assert(value!=null);
+ cache.put(key, value);
+ return value;
+ }
+
+ public synchronized void clear()
+ {
+ cache.clear();
+ }
+
+ public synchronized void retain(Set<K> keys)
+ {
+ cache.keySet().retainAll(keys);
+ }
+
+ public synchronized void remove(Set<K> keys)
+ {
+ cache.keySet().removeAll(keys);
+ }
+
+ public synchronized void load(Set<K> keys)
+ {
+ for (K key : keys)
+ get(key);
+ }
+
+ public synchronized void addAll(CachedMapProvider<K, V> anotherCache)
+ {
+ assertNotDisposed();
+ cache.putAll(anotherCache.cache);
+ }
+
+ public IMapProvider<K, V> getProvider() {
+ return provider;
+ }
+
+ public synchronized Map<K, V> getAll()
+ {
+ assertNotDisposed();
+ return new HashMap<K, V>(cache);
+ }
+
+ @Override
+ protected void doDispose() {
+ clear();
+ }
+
+}
Code Review / simantics / platform.git / blobdiff