Migrated source code from Simantics SVN

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

diff --git a/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/Union.java b/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/Union.java
new file mode 100644 (file)
index 0000000..2a01e7a
--- /dev/null
+++ b/bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/Union.java
@@ -0,0 +1,94 @@
+/*******************************************************************************\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.ArrayList;\r
+import java.util.Collection;\r
+import java.util.Iterator;\r
+import java.util.List;\r
+import java.util.NoSuchElementException;\r
+\r
+public class Union<T> extends ImmutableCollection<T> {\r
+    \r
+    private List<Collection<T>> parts;\r
+    \r
+    public Union(int partCount) {\r
+        parts = new ArrayList<Collection<T>>(partCount);\r
+    }\r
+    \r
+    public void add(Collection<T> part) {\r
+        parts.add(part);\r
+    }\r
+\r
+    @Override\r
+    public boolean contains(Object o) {\r
+        for(Collection<T> part : parts)\r
+            if(part.contains(o))\r
+                return true;\r
+        return false;\r
+    }\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
+\r
+    @Override\r
+    public boolean isEmpty() {\r
+        for(Collection<T> part : parts)\r
+            if(part.isEmpty())\r
+                return true;\r
+        return false;\r
+    }\r
+\r
+    @Override\r
+    public Iterator<T> iterator() {\r
+        \r
+        return new ImmutableIterator<T>() {\r
+\r
+            Iterator<Collection<T>> partIterator = parts.iterator();\r
+            Iterator<T> iterator = null;\r
+            \r
+            @Override\r
+            public boolean hasNext() {\r
+                while(iterator == null || !iterator.hasNext()) {\r
+                    if(!partIterator.hasNext())\r
+                        return false;\r
+                    iterator = partIterator.next().iterator();\r
+                }\r
+                return true;\r
+            }\r
+\r
+            @Override\r
+            public T next() {\r
+                if(hasNext()) \r
+                    return iterator.next();\r
+                else\r
+                    throw new NoSuchElementException();\r
+            }\r
+            \r
+        };\r
+        \r
+    }\r
+\r
+    @Override\r
+    public int size() {\r
+        int count = 0;\r
+        for(Collection<T> part : parts)\r
+            count += part.size();\r
+        return count;\r
+    }\r
+\r
+}\r