Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.diagram / src / org / simantics / diagram / content / TerminalMap.java

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/content/TerminalMap.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/content/TerminalMap.java
new file mode 100644 (file)
index 0000000..d1164ae
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/content/TerminalMap.java
@@ -0,0 +1,53 @@
+/*******************************************************************************\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.diagram.content;\r
+\r
+import java.util.HashMap;\r
+import java.util.Map;\r
+\r
+import org.simantics.db.Resource;\r
+\r
+/**\r
+ * terminal <-> connection point\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class TerminalMap {\r
+\r
+    public static final TerminalMap EMPTY = new TerminalMap(0) {\r
+        public void put(Resource terminal, Resource connectionPoint) {\r
+            throw new UnsupportedOperationException("immutable TerminalMap");\r
+        }\r
+    };\r
+\r
+    private final Map<Resource, Resource> leftToRight;\r
+    private final Map<Resource, Resource> rightToLeft;\r
+\r
+    public TerminalMap(int initialCapacity) {\r
+        leftToRight = new HashMap<Resource, Resource>(initialCapacity);\r
+        rightToLeft = new HashMap<Resource, Resource>(initialCapacity);\r
+    }\r
+\r
+    public Resource getConnectionPoint(Resource terminal) {\r
+        return leftToRight.get(terminal);\r
+    }\r
+\r
+    public Resource getTerminal(Resource connectionPoint) {\r
+        return rightToLeft.get(connectionPoint);\r
+    }\r
+\r
+    public void put(Resource terminal, Resource connectionPoint) {\r
+        leftToRight.put(terminal, connectionPoint);\r
+        rightToLeft.put(connectionPoint, terminal);\r
+    }\r
+\r
+}\r