Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.utils.datastructures / src / org / simantics / utils / datastructures / CollectionAdapter.java

diff --git a/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/CollectionAdapter.java b/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/CollectionAdapter.java
new file mode 100644 (file)
index 0000000..8fadea4
--- /dev/null
+++ b/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/CollectionAdapter.java
@@ -0,0 +1,111 @@
+/*******************************************************************************\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
+package org.simantics.utils.datastructures;\r
+\r
+import java.util.Collection;\r
+import java.util.Iterator;\r
+\r
+public class CollectionAdapter<Domain, Range, C extends Collection<Domain>> \r
+implements Collection<Range> {\r
+\r
+    protected Converter<Domain, Range> converter;\r
+    protected C                        collection;  \r
+      \r
+    public CollectionAdapter(Converter<Domain, Range> converter, C collection) {\r
+        this.converter = converter;\r
+        this.collection = collection;\r
+    }\r
+    @Override\r
+    public boolean add(Range e) {\r
+        return collection.add(converter.convertFrom(e));\r
+    }\r
+    @SuppressWarnings("unchecked")\r
+    @Override\r
+    public boolean addAll(Collection<? extends Range> c) {\r
+        return collection.addAll(new CollectionAdapter<Range, Domain, Collection<Range>>(inverseConverter(converter), (Collection<Range>)c));\r
+    }\r
+    @Override\r
+    public void clear() {\r
+        collection.clear();\r
+    }\r
+    @SuppressWarnings("unchecked")\r
+    @Override\r
+    public boolean contains(Object o) {\r
+        return collection.contains(converter.convertFrom((Range)o));\r
+    }\r
+    @Override\r
+    public boolean containsAll(Collection<?> c) {\r
+        for(Object o : c)\r
+            if(!contains(o))\r
+                return false;\r
+        return true;\r
+    }\r
+    @Override\r
+    public boolean isEmpty() {\r
+        return collection.isEmpty();\r
+    }\r
+    @Override\r
+    public Iterator<Range> iterator() {\r
+        return new IteratorAdapter<Domain, Range, Iterator<Domain>>(converter, collection.iterator());                \r
+    }\r
+    @SuppressWarnings("unchecked")\r
+    @Override\r
+    public boolean remove(Object o) {\r
+        return collection.remove(converter.convertFrom((Range)o));\r
+    }\r
+    @Override\r
+    public boolean removeAll(Collection<?> c) {\r
+        boolean removed = false;\r
+        for(Object o : c)\r
+            removed |= remove(o);\r
+        return removed;\r
+    }\r
+    @SuppressWarnings("unchecked")\r
+    @Override\r
+    public boolean retainAll(Collection<?> c) {\r
+        // FIXME\r
+        return collection.retainAll(new CollectionAdapter<Range, Domain, Collection<Range>>(inverseConverter(converter), (Collection<Range>)c));\r
+    }\r
+    @Override\r
+    public int size() {\r
+        return collection.size();\r
+    }\r
+    @Override\r
+    public Object[] toArray() {\r
+        Object[] ret = new Object[collection.size()];\r
+        int i=0;\r
+        for(Domain d : collection)\r
+            ret[i++] = converter.convertTo(d);\r
+        return ret;\r
+    }\r
+    @Override\r
+    public <T> T[] toArray(T[] a) {\r
+        throw new UnsupportedOperationException();\r
+    }\r
+    \r
+    public static <D,R> Converter<R,D> inverseConverter(final Converter<D,R> converter) {\r
+        return new Converter<R,D>() {\r
+\r
+            @Override\r
+            public R convertFrom(D rangeElement) {\r
+                return converter.convertTo(rangeElement);\r
+            }\r
+\r
+            @Override\r
+            public D convertTo(R domainElement) {\r
+                return converter.convertFrom(domainElement);\r
+            }\r
+            \r
+        };\r
+    }\r
+    \r
+}\r