gson MutableJsonReader example

json_mutable_reader_test.java

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/*
sample_code_java0
File: json_mutable_reader_test.java
Created on: Oct 10, 2020 12:04:38 PM
    @author https://github.com/911992
 
History:
    initial version: 0.1(20201010)
*/

package json_mutable_test;

import com.google.gson.stream.MutableJsonReader;
import java.io.StringReader;
import junit.framework.TestCase;


/**
 * 
 * @author https://github.com/911992
 */
public class json_mutable_reader_test extends TestCase{
    
    
    public void testMutability() throws Exception{
        MutableJsonReader _shared_reader = new MutableJsonReader();
        final String _a = "happy";
        final String _b = "opensource";
        
        String _val = "911";
        String _json=String.format("{\"%s\":\"%s\",\"%s\":\"%s\"}", _a,_val,_b,_val);
        StringReader _str_reader = new StringReader(_json);
        _shared_reader.reset(_str_reader);
        String _a_name,_b_name;
        String _a_val,_b_val;
        _shared_reader.beginObject();
        _a_name = _shared_reader.nextName();
        assertEquals(_a_name, _a);
        _a_val = _shared_reader.nextString();
        assertEquals(_a_val, _val);
        _b_name = _shared_reader.nextName();
        assertEquals(_b_name, _b);
        _b_val = _shared_reader.nextString();
        assertEquals(_b_val, _val);
        _shared_reader.endObject();
        _shared_reader.close();
        System.out.printf("Run 0:\n");
        System.out.printf("json to read: %s\n",_json);
        System.out.printf("%s:%s(%s) , %s:%s(%s)\n",_a,_a_val,_val,_b,_b_val,_val);
        System.out.printf("Pass:%s\n",Boolean.toString((_a_val.equals(_val))&&(_b_val.equals(_val))));
        System.out.println("");
        
        _val ="992";
        _json=String.format("{\"%s\":\"%s\",\"%s\":\"%s\"}", _a,_val,_b,_val);
        _str_reader = new StringReader(_json);
        _shared_reader.reset(_str_reader);
        _shared_reader.beginObject();
        _a_name = _shared_reader.nextName();
        assertEquals(_a_name, _a);
        _a_val = _shared_reader.nextString();
        assertEquals(_a_val, _val);
        _b_name = _shared_reader.nextName();
        assertEquals(_b_name, _b);
        _b_val = _shared_reader.nextString();
        assertEquals(_b_val, _val);
        _shared_reader.endObject();
        _shared_reader.close();
        System.out.printf("Run 1:\n");
        System.out.printf("json to read: %s\n",_json);
        System.out.printf("%s:%s(%s) , %s:%s(%s)\n",_a,_a_val,_val,_b,_b_val,_val);
        System.out.printf("Pass:%s\n",Boolean.toString((_a_val.equals(_val))&&(_b_val.equals(_val))));
        System.out.println("");
    }
    
    public static void main(String[] args) throws Throwable{
        new json_mutable_reader_test().testMutability();
    }
}