--- /dev/null
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * 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 signature.compare.model;
+
+import java.util.Set;
+
+import signature.model.IParameterizedType;
+
+/**
+ * {@code IParameterizedTypeDelta} models the delta between two
+ * {@link IParameterizedType} instances.
+ */
+public interface IParameterizedTypeDelta extends
+ ITypeReferenceDelta<IParameterizedType> {
+
+ /**
+ * Returns a raw type delta or {@code null} if no delta is available.
+ *
+ * @return a raw type delta, maybe {@code null}
+ */
+ ITypeReferenceDelta<?> getRawTypeDelta();
+
+ /**
+ * Returns a owner type delta or {@code null} if no delta is available.
+ *
+ * @return a owner type delta, maybe {@code null}
+ */
+ ITypeReferenceDelta<?> getOwnerTypeDelta();
+
+ /**
+ * Returns a set of argument type deltas or {@code null} if no deltas are
+ * available.
+ *
+ * @return a set of argument type deltas, maybe {@code null}
+ */
+ Set<ITypeReferenceDelta<?>> getArgumentTypeDeltas();
+}