Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.g2d / src / org / simantics / g2d / element / handler / PropertyHandler.java.keep

diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/PropertyHandler.java.keep b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/PropertyHandler.java.keep
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+/*******************************************************************************\r
+ * Copyright (c) 2007- VTT Technical Research Centre of Finland.\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;\r
+\r
+import java.util.Collection;\r
+\r
+import org.simantics.g2d.element.IElement;\r
+import org.simantics.utils.datastructures.valueinterface.ValueAccess;\r
+\r
+/**\r
+ * Handlers public element properties\r
+ * \r
+ * @See {@link PropertyHandlerImpl} default implementation\r
+ * @author Toni Kalajainen\r
+ */\r
+public interface PropertyHandler extends ElementHandler {\r
+\r
+       /**\r
+        * Enumerates property keys\r
+        * @param collection adds property keys\r
+        */\r
+       void enumerateProperties(Collection<String> collection);\r
+       \r
+       /**\r
+        * Attach/deattach (=null) value access to this property handler.\r
+        * Though each propertyhandler can be attached only one value access,\r
+        * there can be parallel property handlers. \r
+        *   \r
+        * @param e\r
+        * @param access value access or null (to deattach)\r
+        */\r
+       void setValueSource(IElement e, ValueAccess<String> access);\r
+       \r
+       Object getValue(IElement e, String key);\r
+       \r
+}\r