Thanks! A simple example to do that in the docs would be very useful.
This is what I did and it works exactly as I wanted it to. Code in redbelow,
shows the changes:
public class TestPerson {
public static void main(String[] args) throws IOException {
Person p1 = Person.newBuilder()
.setField1("52114768")
.setField2("54741573")
.setField3("36702831")
.setField4("1477556")
.setField5("44421078")
.setField6("48688590")
.setField7("21657641")
.setField8("51566604")
.setField9("19799113")
.setField10("31045088")
.setField11("51944937")
.setField12("18035997")
.setField13("47693781")
.setField14("44247784")
.setField15("61035138")
.setField16("62112467")
.setField17("44173609")
.setField18("45795251")
.setField19("38467797")
.setField20("18354530")
.build();
FileOutputStream fos = new FileOutputStream(args[0]);
fos.write(p1.toByteArray());
fos.close();
Person person = Person.parseFrom(new FileInputStream(args[0]));
System.out.println("Read into " + person.getClass().getName() + "
from " + args[0]);
System.out.println(person);
System.out.println("Bytes length " + person.getSerializedSize());
System.out.println();
PersonLite personLite = PersonLite.parseFrom(new
FileInputStream(args[0]));
System.out.println("Read into " + personLite.getClass().getName() +
" from " + args[0]);
System.out.println(personLite);
System.out.println("Bytes length " +
personLite.getSerializedSize());
System.out.println();
Builder personLiteBuilder2 = PersonLite.newBuilder().mergeFrom(new
FileInputStream(args[0]));
personLiteBuilder2.setUnknownFields(UnknownFieldSet.getDefaultInstance());
PersonLite personLite2 = personLiteBuilder2.build();
System.out.println("Read into " + personLite2.getClass().getName()
+ " from " + args[0]);
System.out.println(personLite2);
System.out.println("Bytes length " +
personLite2.getSerializedSize());
}
}
*Output:*
Read into com.javaforu.demo.protobuf.DemoProtos$Person from
D:\Dump\protobuf\in_out\person1.dat
field_1: "52114768"
field_2: "54741573"
field_3: "36702831"
field_4: "1477556"
field_5: "44421078"
field_6: "48688590"
field_7: "21657641"
field_8: "51566604"
field_9: "19799113"
field_10: "31045088"
field_11: "51944937"
field_12: "18035997"
field_13: "47693781"
field_14: "44247784"
field_15: "61035138"
field_16: "62112467"
field_17: "44173609"
field_18: "45795251"
field_19: "38467797"
field_20: "18354530"
Bytes length 204
Read into com.javaforu.demo.protobuf.DemoProtos$PersonLite from
D:\Dump\protobuf\in_out\person1.dat
field_1: "52114768"
field_5: "44421078"
field_10: "31045088"
field_15: "61035138"
field_20: "18354530"
2: "54741573"
3: "36702831"
4: "1477556"
6: "48688590"
7: "21657641"
8: "51566604"
9: "19799113"
11: "51944937"
12: "18035997"
13: "47693781"
14: "44247784"
16: "62112467"
17: "44173609"
18: "45795251"
19: "38467797"
Bytes length 204
Read into com.javaforu.demo.protobuf.DemoProtos$PersonLite from
D:\Dump\protobuf\in_out\person1.dat
field_1: "52114768"
field_5: "44421078"
field_10: "31045088"
field_15: "61035138"
field_20: "18354530"
Bytes length 51
Ashwin (http://www.ashwinjayaprakash.com)
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