/*******************************************************************************
 * Mission Control Technologies, Copyright (c) 2009-2012, United States Government
 * as represented by the Administrator of the National Aeronautics and Space 
 * Administration. All rights reserved.
 *
 * The MCT platform is licensed under the Apache License, Version 2.0 (the 
 * "License"); you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at 
 * http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 
 * License for the specific language governing permissions and limitations under 
 * the License.
 *
 * MCT includes source code licensed under additional open source licenses. See 
 * the MCT Open Source Licenses file included with this distribution or the About 
 * MCT Licenses dialog available at runtime from the MCT Help menu for additional 
 * information. 
 *******************************************************************************/
package gov.nasa.arc.mct.scenario.policy;

import gov.nasa.arc.mct.components.AbstractComponent;
import gov.nasa.arc.mct.policy.ExecutionResult;
import gov.nasa.arc.mct.policy.Policy;
import gov.nasa.arc.mct.policy.PolicyContext;
import gov.nasa.arc.mct.scenario.component.RepositoryCapability;

/**
 * Policy preventing drag-drop linking of objects between 
 * repositories.
 * 
 * Any repository-bound object must exist in exactly one repository, 
 * so a Link when dropping into a repository must be disallowed.
 */
public class RepositoryLinkPolicy implements Policy {

	@Override
	public ExecutionResult execute(PolicyContext context) {
		AbstractComponent parentComponent = context.getProperty(
				PolicyContext.PropertyName.TARGET_COMPONENT.getName(), AbstractComponent.class);

		return new ExecutionResult(context, 
				parentComponent == null || 
				parentComponent.getCapability(RepositoryCapability.class) == null || 
				!"Copy Linked".equals(context.getProperty("DRAG_DROP_ACTION_TYPE", String.class)), 
				"Cannot remove objects from repository (can only delete)");
	}
}

@@ -1499,16 +1499,94 @@
 ility;%0A%0A
+import java.util.Collection;%0Aimport java.util.HashSet;%0Aimport java.util.Set;%0A%0A
 /**%0A * P
@@ -2067,17 +2067,153 @@
 class);%0A
+%09%09Collection%3C?%3E childComponents = context.getProperty(%0A%09%09%09%09PolicyContext.PropertyName.SOURCE_COMPONENTS.getName(), Collection.class);%0A%09%09
 %0A
-
 %09%09return
@@ -2438,73 +2438,616 @@
 ss))
-, %0A%09%09%09%09%22Cannot remove objects from repository (can only delete)%22)
+ %7C%7C %0A%09%09%09%09alreadyContains(parentComponent, (Collection%3C?%3E) childComponents), %0A%09%09%09%09%22Cannot remove objects from repository (can only delete)%22);%0A%09%7D%0A%09%0A%09private boolean alreadyContains(AbstractComponent parentComponent, Collection%3C?%3E childComponents) %7B%0A%09%09Set%3CString%3E contained = new HashSet%3CString%3E();%0A%09%09for (AbstractComponent child : parentComponent.getComponents()) %7B%0A%09%09%09contained.add(child.getComponentId());%0A%09%09%7D%0A%09%09for (Object o : childComponents) %7B%0A%09%09%09if (o instanceof AbstractComponent) %7B%0A%09%09%09%09if (!contained.contains(((AbstractComponent) o).getComponentId())) %7B%0A%09%09%09%09%09return false;%0A%09%09%09%09%7D%0A%09%09%09%7D%0A%09%09%7D%0A%09%09return true
 ;%0A%09%7D

Allow reordering within repositories