StackOverflow Question 21641022: How do I parse class hierarchies with gson?Link: http://stackoverflow.com/questions/21641022

so21641022

package com.copolii.example.so21641022.model.util;

import com.copolii.example.so21641022.model.a.TypeA_A;
import com.copolii.example.so21641022.model.a.TypeA_B;
import com.copolii.example.so21641022.model.b.TypeB_A;
import com.copolii.example.so21641022.model.b.TypeB_B;
import com.copolii.example.so21641022.model.base.AbstractSuperType;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import junit.framework.TestCase;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

@RunWith(JUnit4.class)
public class CustomTypeAdapterFactoryTest extends TestCase {

    private static Gson gson;

    static {
        gson = new GsonBuilder()
                .registerTypeAdapterFactory(new CustomTypeAdapterFactory())
                .create();
    }

    @Test
    public void typeAA() {
        final AbstractSuperType object = gson.fromJson("{\"ct\":1391877149,\"id\":\"abc123\", \"a\":{\"aa\":1 }}", AbstractSuperType.class);

        final TypeA_A aa = (TypeA_A) object;

        assertEquals(1391877149L, aa.getCreationTime());
        assertEquals("abc123", aa.getId());
        assertEquals(1, aa.getAA());
    }

    @Test
    public void typeAB() {
        final AbstractSuperType object = gson.fromJson("{\"ct\":1391877149,\"id\":\"abc123\", \"a\":{\"ab\":234.2345, \"ab1\":\"Hello\"}}", AbstractSuperType.class);

        final TypeA_B ab = (TypeA_B) object;

        assertEquals(1391877149L, ab.getCreationTime());
        assertEquals("abc123", ab.getId());
        assertEquals(234.2345, ab.getAB());
        assertEquals("Hello", ab.getAB1());
    }

    @Test
    public void typeBA() {
        final AbstractSuperType object = gson.fromJson("{\"ct\":1391877149,\"id\":\"abc123\", \"b\":{\"ba\":\"Jello\"}}", AbstractSuperType.class);

        final TypeB_A ba = (TypeB_A) object;

        assertEquals(1391877149L, ba.getCreationTime());
        assertEquals("abc123", ba.getId());
        assertEquals("Jello", ba.getBA());
    }

    @Test
    public void typeBB() {
        final AbstractSuperType object = gson.fromJson("{\"ct\":1391877149,\"id\":\"abc123\", \"b\":{\"bb\":\"Jello\",\"bb1\":\"Mello\"}}", AbstractSuperType.class);

        final TypeB_B bb = (TypeB_B) object;

        assertEquals(1391877149L, bb.getCreationTime());
        assertEquals("abc123", bb.getId());
        assertEquals("Jello", bb.getBB());
        assertEquals("Mello", bb.getBB1());

    }
}