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[gb-231r1-is01/GB_2.3_IS01.git] / cts / tools / signature-tools / src / signature / compare / model / IApiDelta.java

diff --git a/cts/tools/signature-tools/src/signature/compare/model/IApiDelta.java b/cts/tools/signature-tools/src/signature/compare/model/IApiDelta.java
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+++ b/cts/tools/signature-tools/src/signature/compare/model/IApiDelta.java
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+/*
+ * 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.IApi;
+
+/**
+ * {@code IApiDelta} models the delta between two {@link IApi} instances.
+ */
+public interface IApiDelta extends IDelta<IApi> {
+
+    /**
+     * Returns a set of package deltas or {@code null} if no deltas are
+     * available.
+     * 
+     * @return a set of package deltas, maybe {@code null}
+     */
+    Set<IPackageDelta> getPackageDeltas();
+}