Changeset 2946 in josm for trunk/src/org/openstreetmap/josm/tools/MultiMap.java

Timestamp:

06.02.2010 17:37:52 (2 years ago)

Author:

bastiK

Message:

autocompletion: Always add the preset keys/values to the autocompletion list.
Does not apply to the Properties dialog, because it has a seperate implementation of the autocompletion feature.

File:

• trunk/src/org/openstreetmap/josm/tools/MultiMap.java (modified) (1 diff)

trunk/src/org/openstreetmap/josm/tools/MultiMap.java

@@ -2 +2 @@
 package org.openstreetmap.josm.tools;
 
-import java.util.ArrayList;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.HashMap;
 
 /**
- * Maps keys to a list of values. Partial implementation. Extend if you need more!
+ * Maps keys to ordered sets of values.
  */
-public class MultiMap<A, B> extends HashMap<A, List<B>> {
-    public void add(A key, B value) {
-        List<B> vals = get(key);
+public class MultiMap<A, B> extends HashMap<A, LinkedHashSet<B>> {
+    /**
+     * Map a key to a value. Can be called multiple times with the same key, but different value.
+     */
+    public void put(A key, B value) {
+        LinkedHashSet<B> vals = get(key);
         if (vals == null) {
-            vals = new ArrayList<B>();
+            vals = new LinkedHashSet<B>();
             put(key, vals);
         }
         vals.add(value);
     }
+    
+    /**
+     * Put a key that maps to nothing.
+     */
+    public void putVoid(A key) {
+        if (containsKey(key))
+            return;
+        put(key, new LinkedHashSet<B>());
+    }
+
+    /**
+     * Returns a list of values for the given key
+     * or an empty list, if it maps to nothing.
+     */
+    public LinkedHashSet<B> getValues(A key) {
+        if (!containsKey(key))
+            return new LinkedHashSet<B>();
+        return get(key);
+    }
 }