Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.g2d / src / org / simantics / g2d / element / handler / impl / TerminalDataImpl.java

diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/TerminalDataImpl.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/TerminalDataImpl.java
new file mode 100644 (file)
index 0000000..218c138
--- /dev/null
+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/TerminalDataImpl.java
@@ -0,0 +1,81 @@
+/*******************************************************************************\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.g2d.element.handler.impl;\r
+\r
+import org.simantics.g2d.diagram.handler.Topology.Terminal;\r
+import org.simantics.g2d.element.IElement;\r
+import org.simantics.g2d.element.handler.TerminalData;\r
+import org.simantics.utils.datastructures.hints.HintContext;\r
+import org.simantics.utils.datastructures.hints.IHintContext;\r
+import org.simantics.utils.datastructures.hints.IHintContext.Key;\r
+import org.simantics.utils.datastructures.hints.IHintContext.KeyOf;\r
+\r
+/**\r
+ * A straight-forward implementation of the {@link TerminalData} element handler\r
+ * interface. It uses an element's hint context to store a separate HintContext\r
+ * for terminals.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class TerminalDataImpl implements TerminalData {\r
+\r
+    private static final long serialVersionUID = -2131030904280472077L;\r
+\r
+    public static final TerminalDataImpl INSTANCE = new TerminalDataImpl();\r
+\r
+    static class TerminalKey extends KeyOf {\r
+        private final Terminal terminal;\r
+        public TerminalKey(Terminal terminal) {\r
+            super(IHintContext.class);\r
+            if (terminal == null)\r
+                throw new NullPointerException("null terminal");\r
+            this.terminal = terminal;\r
+        }\r
+        @Override\r
+        public int hashCode() {\r
+            return terminal.hashCode();\r
+        }\r
+        @Override\r
+        public boolean equals(Object obj) {\r
+            if (this == obj)\r
+                return true;\r
+            if (!(obj instanceof TerminalKey))\r
+                return false;\r
+            TerminalKey other = (TerminalKey) obj;\r
+            return terminal.equals(other.terminal);\r
+        }\r
+        @Override\r
+        public String toString() {\r
+            return "TERMINAL_DATA(" + terminal + ")";\r
+        }\r
+    }\r
+\r
+    @Override\r
+    public <T> T getHint(IElement e, Terminal t, Key key) {\r
+        IHintContext context = e.getHint(new TerminalKey(t));\r
+        if (context == null)\r
+            return null;\r
+        return context.getHint(key);\r
+    }\r
+\r
+    @Override\r
+    public void setHint(IElement e, Terminal t, Key key, Object value) {\r
+        Key terminalKey = new TerminalKey(t);\r
+        IHintContext context = e.getHint(terminalKey);\r
+        if (context == null) {\r
+            context = new HintContext();\r
+            e.setHint(terminalKey, context);\r
+        }\r
+        context.setHint(key, value);\r
+    }\r
+\r
+}\r