+/*******************************************************************************\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.browsing.ui.common.modifiers;\r
+\r
+import java.util.ArrayList;\r
+import java.util.List;\r
+\r
+import org.simantics.browsing.ui.content.Labeler.EnumerationModifier;\r
+\r
+/**\r
+ * A trivial EnumerationModifier base implementation\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public abstract class AbstractEnumerationModifier<T> implements EnumerationModifier {\r
+\r
+ private final Enumeration<T> enumeration;\r
+ private final EnumeratedValue<T> value;\r
+ private final List<String> values;\r
+\r
+ public AbstractEnumerationModifier(Enumeration<T> enumeration, EnumeratedValue<T> value) {\r
+ assert enumeration != null;\r
+ assert enumeration.size() > 0;\r
+\r
+ this.enumeration = enumeration;\r
+ this.value = value;\r
+\r
+ this.values = new ArrayList<String>(enumeration.size());\r
+ for (EnumeratedValue<T> v : enumeration.values())\r
+ values.add(v.getName());\r
+ }\r
+\r
+ @Override\r
+ public final List<String> getValues() {\r
+ return values;\r
+ }\r
+\r
+ @Override\r
+ public final String getValue() {\r
+ if (value != null)\r
+ return value.getName();\r
+ return enumeration.values().get(0).getName();\r
+ }\r
+\r
+ @Override\r
+ public final String isValid(String label) {\r
+ if (!values.contains(label))\r
+ return "Value '" + label + "' is not among the enumerated values " + values;\r
+ return null;\r
+ }\r
+\r
+ @Override\r
+ public final void modify(String label) {\r
+ int index = values.indexOf(label);\r
+ if (index == -1)\r
+ throw new IllegalArgumentException("Cannot modify enumeration with value '" + label + "', not among the enumerated values " + values);\r
+ modifyWithValue(value, enumeration.values().get(index));\r
+ }\r
+\r
+ protected void modifyWithValue(EnumeratedValue<T> oldEnumValue, EnumeratedValue<T> enumValue) {\r
+ T oldObject = oldEnumValue != null ? oldEnumValue.getObject() : null;\r
+ T newObject = enumValue != null ? enumValue.getObject() : null;\r
+ modifyWithObject(oldObject, newObject);\r
+ }\r
+\r
+ /**\r
+ * At least implement this if you don't override\r
+ * {@link #modifyWithValue(EnumeratedValue, EnumeratedValue)}.\r
+ * \r
+ * @param oldEnumObject\r
+ * @param enumObject\r
+ */\r
+ protected void modifyWithObject(T oldEnumObject, T enumObject) {\r
+ }\r
+\r
+};\r