1 files changed, 77 insertions, 0 deletions
diff --git a/plugins/cdo/bundles/org.eclipse.papyrus.cdo.core/src/org/eclipse/papyrus/cdo/internal/core/CompositeResourceSetDisposalApprover.java b/plugins/cdo/bundles/org.eclipse.papyrus.cdo.core/src/org/eclipse/papyrus/cdo/internal/core/CompositeResourceSetDisposalApprover.java
new file mode 100755
index 00000000..5bbe480b
--- /dev/null
+++ b/plugins/cdo/bundles/org.eclipse.papyrus.cdo.core/src/org/eclipse/papyrus/cdo/internal/core/CompositeResourceSetDisposalApprover.java
@@ -0,0 +1,77 @@
+/*****************************************************************************
+ * Copyright (c) 2013, 2017 CEA LIST and others.
+ *
+ * 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:
+ *   CEA LIST - Initial API and implementation
+ *   Eike Stepper (CEA) - bug 466520
+ *****************************************************************************/
+package org.eclipse.papyrus.cdo.internal.core;
+
+import java.util.Collection;
+import java.util.List;
+
+import org.eclipse.emf.cdo.explorer.checkouts.CDOCheckout;
+import org.eclipse.emf.ecore.resource.ResourceSet;
+import org.eclipse.papyrus.cdo.core.IResourceSetDisposalApprover;
+
+import com.google.common.collect.Lists;
+
+/**
+ * This is the CompositeResourceSetDisposalApprover type. Enjoy.
+ */
+class CompositeResourceSetDisposalApprover
+		implements IResourceSetDisposalApprover {
+
+	private final List<IResourceSetDisposalApprover> approvers = Lists
+			.newArrayListWithExpectedSize(1);
+
+	CompositeResourceSetDisposalApprover() {
+		super();
+	}
+
+	@Override
+	public DisposeAction disposalRequested(CDOCheckout checkout,
+			Collection<ResourceSet> resourceSets) {
+
+		DisposeAction result = DisposeAction.CLOSE;
+
+		if (!resourceSets.isEmpty() && !approvers.isEmpty()) {
+			for (IResourceSetDisposalApprover next : approvers) {
+				DisposeAction action = wrapNull(next
+						.disposalRequested(checkout, resourceSets));
+
+				result = result.compareTo(action) > 0
+						? action
+						: result;
+
+				if (result == DisposeAction.NONE) {
+					// no need to consult anyone else
+					break;
+				}
+			}
+		}
+
+		return result;
+	}
+
+	private DisposeAction wrapNull(DisposeAction action) {
+		return (action == null)
+				? DisposeAction.NONE
+				: action;
+	}
+
+	void addApprover(IResourceSetDisposalApprover approver) {
+		if (!approvers.contains(approver)) {
+			approvers.add(approver);
+		}
+	}
+
+	void removeApprover(IResourceSetDisposalApprover approver) {
+		approvers.remove(approver);
+	}
+}