hal/src/zutil/test/JSONSerializerTest.java

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package zutil.test;

import static org.junit.Assert.assertEquals;

import java.io.*;
import java.util.Arrays;

import org.junit.Test;

import zutil.io.StringOutputStream;
import zutil.parser.json.JSONObjectInputStream;
import zutil.parser.json.JSONObjectOutputStream;

public class JSONSerializerTest{

	@Test
	public void testJavaLegacySerialize() throws InterruptedException, IOException, ClassNotFoundException{
		TestClass sourceObj = new TestClass().init();
		
		ByteArrayOutputStream bout = new ByteArrayOutputStream();
		ObjectOutputStream out = new ObjectOutputStream(bout);
		out.writeObject(sourceObj);
		out.flush();
		out.close();
		byte[] data = bout.toByteArray();
		
		ByteArrayInputStream bin = new ByteArrayInputStream(data);
		ObjectInputStream in = new ObjectInputStream(bin);
		TestClass targetObj = (TestClass) in.readObject();
		in.close();
		
		assertEquals( sourceObj, targetObj );
	}
	
    @Test
    public void testOutputSerializerWithPrimitives() throws InterruptedException, IOException, ClassNotFoundException{
        TestClass sourceObj = new TestClass().init();

        String data = writeObjectToJson(sourceObj);
        data = data.replace("\"", "'");

        assertEquals(
                "{'str': 'abcd', '@class': 'zutil.test.JSONSerializerTest$TestClass', 'obj1': {'@class': 'zutil.test.JSONSerializerTest$TestObj', 'value': 42, '@object_id': 2}, 'obj2': {'@class': 'zutil.test.JSONSerializerTest$TestObj', 'value': 42, '@object_id': 3}, 'decimal': 1.1, '@object_id': 1}",
                data);
    }
	
	@Test
	public void testInputSerializerWithPrimitives() throws InterruptedException, IOException, ClassNotFoundException{
		TestClass sourceObj = new TestClass().init();
		
		TestClass targetObj = sendReceiveObject(sourceObj);
		
		assertEquals( sourceObj, targetObj );
	}
	
    @Test
    public void testOutputSerializerWithClones() throws InterruptedException, IOException, ClassNotFoundException{
    	TestClassObjClone sourceObj = new TestClassObjClone().init();

        String data = writeObjectToJson(sourceObj);
        data = data.replace("\"", "'");

        assertEquals(
                "{'@class': 'zutil.test.JSONSerializerTest$TestClassObjClone', 'obj1': {'@class': 'zutil.test.JSONSerializerTest$TestObj', 'value': 42, '@object_id': 2}, 'obj2': {'@object_id': 2}, '@object_id': 1}",
                data);
    }
	
	@Test
	public void testInputSerializerWithClones() throws InterruptedException, IOException, ClassNotFoundException{
		TestClassObjClone sourceObj = new TestClassObjClone().init();
		
		TestClassObjClone targetObj = sendReceiveObject(sourceObj);
		
		assertEquals( sourceObj, targetObj );
	}

    @Test
    public void testOutputSerializerWithArrays() throws InterruptedException, IOException, ClassNotFoundException{
        TestClassArray sourceObj = new TestClassArray().init();

        String data = writeObjectToJson(sourceObj);
        data = data.replace("\"", "'");

        assertEquals(
                "{'@class': 'zutil.test.JSONSerializerTest$TestClassArray', 'array': [1, 2, 3, 4], '@object_id': 1}",
                data);
    }

    @Test
    public void testInputSerializerWithArrays() throws InterruptedException, IOException, ClassNotFoundException{
        TestClassArray sourceObj = new TestClassArray().init();

        TestClassArray targetObj = sendReceiveObject(sourceObj);

        assertEquals( sourceObj, targetObj );
    }
	
	
	

	/******************* Utility Functions ************************************/
	
	private static <T> T sendReceiveObject(T sourceObj) throws IOException{ 
		return readObjectFromJson(
				writeObjectToJson(sourceObj));
	}
	
	@SuppressWarnings("unchecked")
	private static <T> T readObjectFromJson(String json) throws IOException{
		StringReader bin = new StringReader(json);
		JSONObjectInputStream in = new JSONObjectInputStream(bin);
		T targetObj = (T) in.readObject();
		in.close();
		
		return targetObj;
	}
	
	private static <T> String writeObjectToJson(T sourceObj) throws IOException{
		StringOutputStream bout = new StringOutputStream();
		JSONObjectOutputStream out = new JSONObjectOutputStream(bout);
		
		out.writeObject(sourceObj);
		out.flush();
		out.close();
		
		String data = bout.toString();
        System.out.println(data);
        
        return data;
	}
	
	/******************** Test Classes ************************************/
	
	public static class TestClass implements Serializable{
		private static final long serialVersionUID = 1L;
		String str;
		double decimal;
		TestObj obj1;
		TestObj obj2;
		
		public TestClass init(){
			this.str = "abcd";
			this.decimal = 1.1;
			this.obj1 = new TestObj().init();
			this.obj2 = new TestObj().init();
			return this;
		}
		
		public boolean equals(Object obj){
			return obj instanceof TestClass && 
					this.str.equals(((TestClass)obj).str) &&
					this.decimal == ((TestClass)obj).decimal &&
					this.obj1.equals(((TestClass)obj).obj1) &&
					this.obj2.equals(((TestClass)obj).obj2);
		}
	}
	
	public static class TestClassObjClone{
		TestObj obj1;
		TestObj obj2;
		
		public TestClassObjClone init(){
			this.obj1 = this.obj2 = new TestObj().init();
			return this;
		}
		
		public boolean equals(Object obj){
			return obj instanceof TestClassObjClone && 
					this.obj1.equals(((TestClassObjClone)obj).obj1) &&
					this.obj1 == this.obj2 &&
					((TestClassObjClone)obj).obj1 == ((TestClassObjClone)obj).obj2;
		}
	}
	
	public static class TestObj implements Serializable{
		private static final long serialVersionUID = 1L;
		int value;
		
		public TestObj init(){
			this.value = 42;
			return this;
		}
		
		public boolean equals(Object obj){
			return obj instanceof TestObj &&
                    this.value == ((TestObj)obj).value;
		}
	}

    public static class TestClassArray{
        private int[] array;

        public TestClassArray init(){
            array = new int[]{1,2,3,4};
            return this;
        }

        public boolean equals(Object obj){
            return obj instanceof TestClassArray &&
                    Arrays.equals(this.array ,((TestClassArray)obj).array);
        }
    }
}