X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.utils.datastructures%2Fsrc%2Forg%2Fsimantics%2Futils%2Fdatastructures%2FCollectionAdapter.java;fp=bundles%2Forg.simantics.utils.datastructures%2Fsrc%2Forg%2Fsimantics%2Futils%2Fdatastructures%2FCollectionAdapter.java;h=8fadea4336c0fd24b54a2c41261855df259fce24;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

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