Add inheritance support for parcelable dataclasses

We don't want to recommend this, but some legacy framework classes use
inheritance, and it's easy enough to support

Fixes: 142081378
Test: . frameworks/base/tests/Codegen/runTest.sh
Change-Id: Ifb7f34abf1dfb871ac01b9a9a38dfee144e5f49a

1 files changed, 126 insertions, 0 deletions

diff --git a/tests/Codegen/src/com/android/codegentest/HierrarchicalDataClassChild.java b/tests/Codegen/src/com/android/codegentest/HierrarchicalDataClassChild.java
new file mode 100644
index 000000000000..27a6933d25e8
--- /dev/null
+++ b/tests/Codegen/src/com/android/codegentest/HierrarchicalDataClassChild.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2019 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 com.android.codegentest;
+
+import android.annotation.NonNull;
+import android.os.Parcelable;
+
+import com.android.internal.util.DataClass;
+
+/**
+ * An example of data classes that extend one another.
+ *
+ * Note that some features like constructor generation might not work well due to lack of
+ * information about the superclass when generating code for subclass.
+ *
+ * It is recommended to avoid inheritance in favor of composition for new data classes,
+ * particularly parcelable ones.
+ *
+ * However for legacy classes or where inheritance is desired for allocation efficiency,
+ * you can either use a technique from this example, opting for mutability/setters, or just write
+ * constructors by hand.
+ *
+ * @see HierrarchicalDataClassBase
+ */
+@DataClass(
+        genParcelable = true,
+        genConstructor = false,
+        genSetters = true)
+public class HierrarchicalDataClassChild extends HierrarchicalDataClassBase {
+
+    private @NonNull String mChildData;
+
+
+
+    // Code below generated by codegen v1.0.5.
+    //
+    // DO NOT MODIFY!
+    // CHECKSTYLE:OFF Generated code
+    //
+    // To regenerate run:
+    // $ codegen $ANDROID_BUILD_TOP/frameworks/base/tests/Codegen/src/com/android/codegentest/HierrarchicalDataClassChild.java
+
+
+    @DataClass.Generated.Member
+    public @NonNull String getChildData() {
+        return mChildData;
+    }
+
+    @DataClass.Generated.Member
+    public HierrarchicalDataClassChild setChildData(@NonNull String value) {
+        mChildData = value;
+        com.android.internal.util.AnnotationValidations.validate(
+                NonNull.class, null, mChildData);
+        return this;
+    }
+
+    @Override
+    @DataClass.Generated.Member
+    public void writeToParcel(android.os.Parcel dest, int flags) {
+        // You can override field parcelling by defining methods like:
+        // void parcelFieldName(Parcel dest, int flags) { ... }
+
+        super.writeToParcel(dest, flags);
+
+        dest.writeString(mChildData);
+    }
+
+    @Override
+    @DataClass.Generated.Member
+    public int describeContents() { return 0; }
+
+    /** @hide */
+    @SuppressWarnings({"unchecked", "RedundantCast"})
+    @DataClass.Generated.Member
+    protected HierrarchicalDataClassChild(android.os.Parcel in) {
+        // You can override field unparcelling by defining methods like:
+        // static FieldType unparcelFieldName(Parcel in) { ... }
+
+        super(in);
+
+        String childData = in.readString();
+
+        this.mChildData = childData;
+        com.android.internal.util.AnnotationValidations.validate(
+                NonNull.class, null, mChildData);
+
+        // onConstructed(); // You can define this method to get a callback
+    }
+
+    @DataClass.Generated.Member
+    public static final @NonNull Parcelable.Creator<HierrarchicalDataClassChild> CREATOR
+            = new Parcelable.Creator<HierrarchicalDataClassChild>() {
+        @Override
+        public HierrarchicalDataClassChild[] newArray(int size) {
+            return new HierrarchicalDataClassChild[size];
+        }
+
+        @Override
+        public HierrarchicalDataClassChild createFromParcel(android.os.Parcel in) {
+            return new HierrarchicalDataClassChild(in);
+        }
+    };
+
+    @DataClass.Generated(
+            time = 1570231101208L,
+            codegenVersion = "1.0.5",
+            sourceFile = "frameworks/base/tests/Codegen/src/com/android/codegentest/HierrarchicalDataClassChild.java",
+            inputSignatures = "private @android.annotation.NonNull java.lang.String mChildData\nclass HierrarchicalDataClassChild extends com.android.codegentest.HierrarchicalDataClassBase implements []\n@com.android.internal.util.DataClass(genParcelable=true, genConstructor=false, genSetters=true)")
+    @Deprecated
+    private void __metadata() {}
+
+}