diff dwtx/jface/viewers/deferred/IntHashMap.d @ 10:b6c35faf97c8

Viewers
author Frank Benoit <benoit@tionex.de>
date Mon, 31 Mar 2008 00:47:19 +0200
parents
children 04b47443bb01
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/viewers/deferred/IntHashMap.d	Mon Mar 31 00:47:19 2008 +0200
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+/*******************************************************************************
+ * Copyright (c) 2004, 2006 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
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.jface.viewers.deferred.IntHashMap;
+
+import tango.util.collection.HashMap;
+
+/**
+ * Represents a map of objects onto ints. This is intended for future optimization:
+ * using int primitives would allow for an implementation that doesn't require
+ * additional object allocations for Integers. However, the current implementation
+ * simply delegates to the Java HashMap class.
+ *
+ * @since 3.1
+ */
+/* package */ class IntHashMap {
+    private HashMap!(Object,int) map;
+
+    /**
+     * @param size
+     * @param loadFactor
+     */
+    public this(int size, float loadFactor) {
+        map = new HashMap!(Object,int);
+//         (size, loadFactor);
+    }
+
+    /**
+     *
+     */
+    public this() {
+        map = new HashMap!(Object,int);
+    }
+
+    /**
+     * @param key
+     */
+    public void remove(Object key) {
+        map.removeKey(key);
+    }
+
+    /**
+     * @param key
+     * @param value
+     */
+    public void put(Object key, int value) {
+        map.add(key, value);
+    }
+
+    /**
+     * @param key
+     * @return the int value at the given key
+     */
+    public int get(Object key) {
+        return get(key, 0);
+    }
+
+    /**
+     * @param key
+     * @param defaultValue
+     * @return the int value at the given key, or the default value if this map does not contain the given key
+     */
+    public int get(Object key, int defaultValue) {
+        if( map.containsKey( key )){
+            return map.get(key);
+        }
+        return defaultValue;
+    }
+
+    /**
+     * @param key
+     * @return <code>true</code> if this map contains the given key, <code>false</code> otherwise
+     */
+    public bool containsKey(Object key) {
+        return map.containsKey(key);
+    }
+
+    /**
+     * @return the number of key/value pairs
+     */
+    public int size() {
+        return map.size();
+    }
+}