--- /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 signature.model.IParameter;
+
+/**
+ * {@code IParameterDelta} models the delta between two {@link IParameter}
+ * instances.
+ */
+public interface IParameterDelta extends IDelta<IParameter>,
+ IAnnotatableElementDelta {
+
+ /**
+ * Returns a parameter type delta or {@code null} if no delta is available.
+ *
+ * @return a parameter type delta, maybe {@code null}
+ */
+ public ITypeReferenceDelta<?> getTypeDelta();
+}