Migrated source code from Simantics SVN

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

diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/element/impl/MutatedElement.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/impl/MutatedElement.java
new file mode 100644 (file)
index 0000000..57ecf93
--- /dev/null
+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/impl/MutatedElement.java
@@ -0,0 +1,140 @@
+package org.simantics.g2d.element.impl;\r
+\r
+import java.util.Map;\r
+\r
+import org.simantics.g2d.diagram.IDiagram;\r
+import org.simantics.g2d.element.ElementClass;\r
+import org.simantics.g2d.element.IElement;\r
+import org.simantics.g2d.element.handler.ElementAdapter;\r
+import org.simantics.g2d.element.handler.LifeCycle;\r
+import org.simantics.utils.datastructures.hints.HintContext;\r
+import org.simantics.utils.datastructures.hints.HintStack;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class MutatedElement extends HintStack implements IElement {\r
+\r
+    IDiagram     diagram;\r
+    IElement     orig;\r
+    ElementClass origClass;\r
+    HintContext  mutations;\r
+\r
+    public MutatedElement(IElement orig) {\r
+        if (orig == null)\r
+            throw new IllegalArgumentException("null arg");\r
+        this.orig = orig;\r
+        this.origClass = orig.getElementClass();\r
+        this.addHintContext(orig, 0);\r
+    }\r
+\r
+    @Override\r
+    public void addedToDiagram(IDiagram ctx) {\r
+        this.diagram = ctx;\r
+    }\r
+\r
+    @Override\r
+    public IDiagram getDiagram() {\r
+        assert diagram != null;\r
+        return diagram;\r
+    }\r
+\r
+    @Override\r
+    public IDiagram peekDiagram() {\r
+        return diagram;\r
+    }\r
+\r
+    @Override\r
+    public ElementClass getElementClass() {\r
+        return origClass;\r
+    }\r
+\r
+    @Override\r
+    public synchronized void clearWithoutNotification() {\r
+        if (mutations != null)\r
+            mutations.clearWithoutNotification();\r
+    }\r
+\r
+    @Override\r
+    public synchronized <E> E removeHint(Key key) {\r
+        if (key == null)\r
+            throw new IllegalArgumentException("key is null");\r
+        if (mutations == null)\r
+            return null;\r
+        E result = mutations.removeHint(key);\r
+        if (mutations.size() == 0) {\r
+            removeHintContext(mutations);\r
+            mutations = null;\r
+        }\r
+        return result;\r
+    }\r
+\r
+    @Override\r
+    public synchronized void setHint(Key key, Object value) {\r
+        if (key == null)\r
+            throw new IllegalArgumentException("key is null");\r
+        if (value == null)\r
+            throw new IllegalArgumentException("value is null");\r
+        if (!key.isValueAccepted(value))\r
+            throw new RuntimeException("Value \"" + value + "\" is not accepted with key " + key.getClass().getName());\r
+        if (mutations == null) {\r
+            mutations = new HintContext();\r
+            addHintContext(mutations, 10);\r
+        }\r
+        mutations.setHint(key, value);\r
+    }\r
+\r
+    @Override\r
+    public synchronized void setHints(Map<Key, Object> hints) {\r
+        if (mutations == null) {\r
+            mutations = new HintContext();\r
+            addHintContext(mutations, 10);\r
+        }\r
+        mutations.setHints(hints);\r
+    }\r
+\r
+    @Override\r
+    public void destroy() {\r
+        for (LifeCycle lc : getElementClass().getItemsByClass(LifeCycle.class))\r
+            lc.onElementDestroyed(this);\r
+        dispose();\r
+    }\r
+\r
+    @Override\r
+    public void dispose() {\r
+        if (mutations != null)\r
+            this.removeHintContext(mutations);\r
+        this.removeHintContext(orig);\r
+        orig = null;\r
+        origClass = null;\r
+        mutations = null;\r
+    }\r
+\r
+    @SuppressWarnings({ "rawtypes", "unchecked" })\r
+    public Object getAdapter(Class adapter) {\r
+        for (ElementAdapter ea : getElementClass().getItemsByClass(ElementAdapter.class)) {\r
+            Object result = ea.adapt(this, adapter);\r
+            if (result != null)\r
+                return result;\r
+        }\r
+        return null;\r
+    }\r
+\r
+    @Override\r
+    public int hashCode() {\r
+        return orig != null ? orig.hashCode() : 0;\r
+    }\r
+\r
+    @Override\r
+    public boolean equals(Object obj) {\r
+        if (this == obj)\r
+            return true;\r
+        return orig == null ? false : orig.equals(obj);\r
+    }\r
+\r
+    @Override\r
+    public String toString() {\r
+        return "MutatedElement[" + orig + " " + origClass + "]";\r
+    }\r
+\r
+}\r