1 files changed, 69 insertions, 0 deletions

diff --git a/uml/org.eclipse.papyrus.diagram.common/src/org/eclipse/papyrus/diagram/common/commands/RequiredPortLinkHelper.java b/uml/org.eclipse.papyrus.diagram.common/src/org/eclipse/papyrus/diagram/common/commands/RequiredPortLinkHelper.java
new file mode 100644
index 00000000000..bed24a4c3e1
--- /dev/null
+++ b/uml/org.eclipse.papyrus.diagram.common/src/org/eclipse/papyrus/diagram/common/commands/RequiredPortLinkHelper.java
@@ -0,0 +1,69 @@
+/*******************************************************************************
+ * Copyright (c) 2008 Conselleria de Infraestructuras y Transporte,
+ * Generalitat de la Comunitat Valenciana .
+ * 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: Francisco Javier Cano Muñoz (Prodevelop) - initial API implementation
+ *
+ ******************************************************************************/
+package org.eclipse.papyrus.diagram.common.commands;
+
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.edit.domain.AdapterFactoryEditingDomain;
+import org.eclipse.uml2.uml.Classifier;
+import org.eclipse.uml2.uml.Interface;
+import org.eclipse.uml2.uml.Port;
+import org.eclipse.uml2.uml.Type;
+
+public class RequiredPortLinkHelper {
+
+	private final AdapterFactoryEditingDomain myEditingDomain;
+
+	private final EObject mySource;
+
+	private final EObject myTarget;
+
+	public RequiredPortLinkHelper(AdapterFactoryEditingDomain editingDomain, EObject source, EObject target) {
+		myEditingDomain = editingDomain;
+		mySource = source;
+		myTarget = target;
+	}
+
+	public void create() {
+		if (getSource() == null || getTarget() == null || getSource().getType() == null) {
+			return;
+		}
+		Type type = getSource().getType();
+		if (type instanceof Classifier && !(type instanceof Interface)) {
+			Classifier classifier = (Classifier) type;
+			classifier.createUsage(getTarget());
+		}
+	}
+
+	public boolean canCreate() {
+		if (getSource() == null) {
+			return true; // link creation is in progress; source is not defined yet
+		}
+		Type type = getSource().getType();
+		if (type == null) {
+			return false;
+		}
+		if (false == type instanceof Classifier || (type instanceof Interface)) {
+			return false;
+		}
+		boolean isReadOnly = myEditingDomain.isReadOnly(type.eResource());
+		return !isReadOnly;
+	}
+
+	private Port getSource() {
+		return (Port) mySource;
+	}
+
+	private Interface getTarget() {
+		return (Interface) myTarget;
+	}
+
+}