An attempt to make it work when AutoParcel && AutoGson comes with Generic field that also annotated with AutoParcel

Inner.java

package com.github.piasy.model.entities;

import android.support.annotation.NonNull;
import auto.parcel.AutoParcel;
import com.github.piasy.common.utils.model.AutoGson;

/**
 * Created by Piasy{github.com/Piasy} on 15/8/21.
 */
@AutoParcel
@AutoGson(autoClass = AutoParcel_Inner.class)
public abstract class Inner {
    @NonNull
    public static Builder builder() {
        return new AutoParcel_Inner.Builder();
    }

    @NonNull
    public abstract String name();

    public abstract int age();

    @AutoParcel.Builder
    public static abstract class Builder {
        @NonNull
        public abstract Builder name(@NonNull String name);

        @NonNull
        public abstract Builder age(int age);

        @NonNull
        public abstract Inner bulid();
    }
}

NestedAutoParcelAutoGsonTest.java

package com.github.piasy.model.entities;

import com.github.piasy.common.utils.model.AutoGenTypeAdapterFactory;
import com.google.common.reflect.TypeToken;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import java.lang.reflect.Type;
import junit.framework.Assert;
import org.junit.Before;
import org.junit.Test;

/**
 * Created by Piasy{github.com/Piasy} on 15/8/21.
 */
public class NestedAutoParcelAutoGsonTest {

    private Gson mGson;

    @Before
    public void setUp() {
        mGson = new GsonBuilder().registerTypeAdapterFactory(new AutoGenTypeAdapterFactory())
                .setPrettyPrinting()
                .create();
    }

    @Test
    public void testNestedAutoParcelAutoGsonTest() {
        String mock = "{\"name\":\"Piasy\",\"age\":10,\"inner\":{\"name\":\"PiaSys\",\"age\":2}}";

        Outer outer = mGson.fromJson(mock, Outer.class);
        Assert.assertEquals("Piasy", outer.name());
        Assert.assertEquals(10, outer.age());
        Assert.assertEquals("PiaSys", outer.inner().name());
        Assert.assertEquals(2, outer.inner().age());
    }

    @Test
    public void testNestedListInner() {
        String mock =
                "{\"name\":\"Piasy\",\"age\":10,\"inners\":[{\"name\":\"PiaSys\",\"age\":2}]}";

        OuterWithListInner outerWithListInner = mGson.fromJson(mock, OuterWithListInner.class);
        Assert.assertEquals("Piasy", outerWithListInner.name());
        Assert.assertEquals(10, outerWithListInner.age());
        Assert.assertEquals(1, outerWithListInner.inners().size());
        Inner inner = outerWithListInner.inners().get(0);
        Assert.assertEquals("PiaSys", inner.name());
        Assert.assertEquals(2, inner.age());
    }

    @Test
    public void testNestedGenericList() {
        String mock =
                "{\"name\":\"Piasy\",\"age\":10,\"inners\":[{\"name\":\"PiaSys\",\"age\":2}]}";

        Type type = new TypeToken<OuterWithGenericList<Inner>>() {
        }.getType();
        OuterWithGenericList<Inner> outerWithGenericList = mGson.fromJson(mock, type);
        Assert.assertEquals("Piasy", outerWithGenericList.name());
        Assert.assertEquals(10, outerWithGenericList.age());
        Assert.assertEquals(1, outerWithGenericList.inners().size());
        // inners' type will be LinkedTreeMap
        /*Inner inner = outerWithGenericList.inners().get(0);
        Assert.assertEquals("PiaSys", inner.name());
        Assert.assertEquals(2, inner.age());*/

        // with generated real type, the deserialize will be correct
        Type generatedType = new TypeToken<AutoParcel_OuterWithGenericList<AutoParcel_Inner>>() {
        }.getType();
        AutoParcel_OuterWithGenericList<AutoParcel_Inner> outerWithGenericList2 =
                mGson.fromJson(mock, generatedType);
        Assert.assertEquals("Piasy", outerWithGenericList.name());
        Assert.assertEquals(10, outerWithGenericList.age());
        Assert.assertEquals(1, outerWithGenericList.inners().size());
        AutoParcel_Inner inner2 = outerWithGenericList2.inners().get(0);
        Assert.assertEquals("PiaSys", inner2.name());
        Assert.assertEquals(2, inner2.age());
    }
}

Outer.java

package com.github.piasy.model.entities;

import android.support.annotation.NonNull;
import auto.parcel.AutoParcel;
import com.github.piasy.common.utils.model.AutoGson;

/**
 * Created by Piasy{github.com/Piasy} on 15/8/21.
 */
@AutoParcel
@AutoGson(autoClass = AutoParcel_Outer.class)
public abstract class Outer {
    @NonNull
    public static Builder builder() {
        return new AutoParcel_Outer.Builder();
    }

    @NonNull
    public abstract String name();

    public abstract int age();

    @NonNull
    public abstract Inner inner();

    @AutoParcel.Builder
    public static abstract class Builder {
        @NonNull
        public abstract Builder name(@NonNull String name);

        @NonNull
        public abstract Builder age(int age);

        @NonNull
        public abstract Builder inner(@NonNull Inner inner);

        @NonNull
        public abstract Outer bulid();
    }
}

OuterWithGenericList.java

package com.github.piasy.model.entities;

import android.support.annotation.NonNull;
import auto.parcel.AutoParcel;
import com.github.piasy.common.utils.model.AutoGson;
import java.util.List;

/**
 * Created by Piasy{github.com/Piasy} on 15/8/21.
 */
@AutoParcel
// Loss Parameter type info here, of course AutoGenTypeAdapterFactory will not work.
// To amend this, gson has a empty anonymous TypeToken class instance to capture
// its parameter type info, but annotation attribute must be constant, could not use
// TypeToken here.
// Maybe could use some other technique to achieve this purpose
// (ref: http://stackoverflow.com/a/14139700/3077508), but this kind of usage could be avoided, just
// use OuterWithListInner class, avoiding use generic for Outer class.
@AutoGson(autoClass = AutoParcel_OuterWithGenericList.class)
public abstract class OuterWithGenericList<T> {

    @NonNull
    public static <D> Builder<D> builder() {
        return new AutoParcel_OuterWithGenericList.Builder<>();
    }

    @NonNull
    public abstract String name();

    public abstract int age();

    @NonNull
    public abstract List<T> inners();

    @AutoParcel.Builder
    public static abstract class Builder<T> {
        @NonNull
        public abstract Builder<T> name(@NonNull String name);

        @NonNull
        public abstract Builder<T> age(int age);

        @NonNull
        public abstract Builder<T> inners(@NonNull List<T> inners);

        @NonNull
        public abstract OuterWithGenericList<T> bulid();
    }
}

OuterWithListInner.java

package com.github.piasy.model.entities;

import android.support.annotation.NonNull;
import auto.parcel.AutoParcel;
import com.github.piasy.common.utils.model.AutoGson;
import java.util.List;

/**
 * Created by Piasy{github.com/Piasy} on 15/8/21.
 */
@AutoParcel
@AutoGson(autoClass = AutoParcel_OuterWithListInner.class)
public abstract class OuterWithListInner {
    @NonNull
    public static Builder builder() {
        return new AutoParcel_OuterWithListInner.Builder();
    }

    @NonNull
    public abstract String name();

    public abstract int age();

    @NonNull
    public abstract List<Inner> inners();

    @AutoParcel.Builder
    public static abstract class Builder {
        @NonNull
        public abstract Builder name(@NonNull String name);

        @NonNull
        public abstract Builder age(int age);

        @NonNull
        public abstract Builder inners(@NonNull List<Inner> inners);

        @NonNull
        public abstract OuterWithListInner bulid();
    }
}