From 0871526d83896d74260d5cc63e7c5b4770c274c2 Mon Sep 17 00:00:00 2001
From: Daniel Ratiu <ratiu@fortiss.org>
Date: Tue, 13 Sep 2011 09:24:49 +0000
Subject: [PATCH] new utility method refs 163
---
.../tooling/kernel/utils/EcoreUtils.java | 75 +++++++++++++++++++
1 file changed, 75 insertions(+)
create mode 100644 org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/utils/EcoreUtils.java
diff --git a/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/utils/EcoreUtils.java b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/utils/EcoreUtils.java
new file mode 100644
index 000000000..e949cb199
--- /dev/null
+++ b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/utils/EcoreUtils.java
@@ -0,0 +1,75 @@
+/*--------------------------------------------------------------------------+
+$Id: codetemplates.xml 1 2011-01-01 00:00:01Z hoelzl $
+| |
+| Copyright 2011 ForTISS GmbH |
+| |
+| 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. |
++--------------------------------------------------------------------------*/
+package org.fortiss.tooling.kernel.utils;
+
+import org.eclipse.emf.common.util.BasicEList;
+import org.eclipse.emf.common.util.ECollections;
+import org.eclipse.emf.common.util.EList;
+
+/**
+ * Utility methods for dealing with .ecore models. These methods should be used
+ * to define EMF operations that make the models easier to use.
+ *
+ * @author ratiu
+ * @author $Author: hoelzl $
+ * @version $Rev: 18709 $
+ * @ConQAT.Rating RED Hash:
+ */
+public class EcoreUtils {
+
+ /**
+ * Converts an EList of a given type into an EList of one of its subtypes.
+ * Utility method to avoid unnecessary casts.
+ *
+ * @param targetClass
+ * - the class representing the subtype
+ * @param sourceList
+ * - the source list containing objects of type S, a supertype of
+ * T
+ * @return a target EList containing elements of type targetClazz
+ */
+ @SuppressWarnings("unchecked")
+ public static <S, T extends S> EList<T> convertList(Class<T> targetClass,
+ EList<S> sourceList) {
+ return (EList<T>) (EList<?>) sourceList;
+ }
+
+ /**
+ * From a given EList with source objects of type S create another
+ * unmodifiable EList with objects of type T, whereby T is a sub-type of S.
+ * The resulting EList is unmodifiable thereby it represents only a view
+ * over the source list.
+ *
+ * @param targetClass
+ * - a class representing type T
+ * @param sourceList
+ * - an EList with objects of type S
+ * @return an unmodifiable EList of objects of type T
+ */
+ @SuppressWarnings("unchecked")
+ public static <S, T extends S> EList<T> pickInstanceOf(
+ Class<T> targetClass, EList<S> sourceList) {
+ if (sourceList == null)
+ return null;
+ EList<T> result = new BasicEList<T>();
+ for (S sourceElement : sourceList)
+ if (targetClass.isAssignableFrom(sourceElement.getClass()))
+ result.add((T) sourceElement);
+ return ECollections.unmodifiableEList(result);
+ }
+}
--
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