1 files changed, 73 insertions, 0 deletions
diff --git a/propertysheet/src/org/eclipse/wb/internal/core/model/property/editor/PropertyDescriptorEditorProvider.java b/propertysheet/src/org/eclipse/wb/internal/core/model/property/editor/PropertyDescriptorEditorProvider.java
new file mode 100644
index 0000000..a60b698
--- /dev/null
+++ b/propertysheet/src/org/eclipse/wb/internal/core/model/property/editor/PropertyDescriptorEditorProvider.java
@@ -0,0 +1,73 @@
+/*******************************************************************************
+ * Copyright (c) 2011 Google, Inc.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Google, Inc. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.wb.internal.core.model.property.editor;
+
+import java.beans.PropertyDescriptor;
+
+/**
+ * {@link PropertyEditorProvider} that creates editors based on {@link PropertyDescriptor}
+ * attributes, such as "enumerationValues".
+ * 
+ * @author scheglov_ke
+ * @coverage core.model.property.editor
+ */
+public final class PropertyDescriptorEditorProvider extends PropertyEditorProvider {
+  ////////////////////////////////////////////////////////////////////////////
+  //
+  // PropertyEditorProvider
+  //
+  ////////////////////////////////////////////////////////////////////////////
+  @Override
+  public PropertyEditor getEditorForPropertyDescriptor(PropertyDescriptor descriptor)
+      throws Exception {
+    {
+      Object attributeValue = descriptor.getValue("enumerationValues");
+      if (isEnumerationProperty(descriptor)) {
+        return new EnumerationValuesPropertyEditor(attributeValue);
+      }
+    }
+    return null;
+  }
+
+  ////////////////////////////////////////////////////////////////////////////
+  //
+  // Utils
+  //
+  ////////////////////////////////////////////////////////////////////////////
+  /**
+   * @return <code>true</code> if given {@link PropertyDescriptor} has attribute "enumerationValues"
+   *         with valid value structure.
+   */
+  private static boolean isEnumerationProperty(PropertyDescriptor descriptor) {
+    Object attributeValue = descriptor.getValue("enumerationValues");
+    // should be Object[]
+    if (!(attributeValue instanceof Object[])) {
+      return false;
+    }
+    Object[] enumElements = (Object[]) attributeValue;
+    // should be multiple 3
+    if (enumElements.length % 3 != 0) {
+      return false;
+    }
+    // elements should be sequence of [String,Object,String]
+    for (int i = 0; i < enumElements.length; i++) {
+      Object element = enumElements[i];
+      if (i % 3 == 0 && !(element instanceof String)) {
+        return false;
+      }
+      if (i % 3 == 2 && !(element instanceof String)) {
+        return false;
+      }
+    }
+    // OK
+    return true;
+  }
+}