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*/
/* @test
* @bug 4214888
* @clean CheckModifiers TestClass1 TestClass2
* @build CheckModifiers
* @run main CheckModifiers
* @summary Make sure that serialpersistentFields data member is used to
* represent tyhe serializable fields only if it has the modfiers
* static, final, private and the type is ObjectStreamField.
* No need to check for static, as ObjectStreamField class is not
* serializable.
*
*/
import java.io.*;
class TestClass1 implements Serializable {
// Missing the "final" modifier
private static ObjectStreamField[] serialPersistentFields = {
new ObjectStreamField("field1", Integer.class),
new ObjectStreamField("field2", Double.TYPE),
};
Integer field1;
double field2;
int field3;
String field4;
public TestClass1(Integer f1, double f2, int f3, String f4) {
field1 = f1;
field2 = f2;
field3 = f3;
field4 = f4;
}
private void readObject(ObjectInputStream ois)
throws IOException, ClassNotFoundException {
ObjectInputStream.GetField pfields = ois.readFields();
field1 = (Integer) pfields.get("field1", new Integer(100));
field2 = pfields.get("field2", 99.99);
/* These fields must be present in the stream */
try {
field3 = pfields.get("field3", 99);
System.out.println("Passes test 1a");
} catch(IllegalArgumentException e) {
throw new Error("data field: field3 not in the persistent stream");
}
try {
field4 = (String) pfields.get("field4", "Default string");
System.out.println("Passes test 1b");
} catch(IllegalArgumentException e) {
throw new Error("data field: field4 not in the persistent stream");
}
}
};
class TestClass2 implements Serializable {
// public instead of private
public static final ObjectStreamField[] serialPersistentFields = {
new ObjectStreamField("field1", Integer.class),
new ObjectStreamField("field2", Double.TYPE),
};
Integer field1;
double field2;
int field3;
String field4;
public TestClass2(Integer f1, double f2, int f3, String f4) {
field1 = f1;
field2 = f2;
field3 = f3;
field4 = f4;
}
private void readObject(ObjectInputStream ois)
throws IOException, ClassNotFoundException {
ObjectInputStream.GetField pfields = ois.readFields();
field1 = (Integer) pfields.get("field1", new Integer(100));
field2 = pfields.get("field2", 99.99);
/* These fields must be present in the stream */
try {
field3 = pfields.get("field3", 99);
System.out.println("Passes test 2a");
} catch(IllegalArgumentException e) {
throw new Error("data field: field3 not in the persistent stream");
}
try {
field4 = (String) pfields.get("field4", "Default string");
System.out.println("Passes test 2b");
} catch(IllegalArgumentException e) {
throw new Error("data field: field4 not in the persistent stream");
}
}
};
class TestClass3 implements Serializable{
// Not of type ObjectStreamField
private final String[] serialPersistentFields = {"Foo","Foobar"};;
Integer field1;
double field2;
int field3;
String field4;
public TestClass3(Integer f1, double f2, int f3, String f4) {
field1 = f1;
field2 = f2;
field3 = f3;
field4 = f4;
}
private void readObject(ObjectInputStream ois)
throws IOException, ClassNotFoundException {
ObjectInputStream.GetField pfields = ois.readFields();
field1 = (Integer) pfields.get("field1", new Integer(100));
field2 = pfields.get("field2", 99.99);
field3 = pfields.get("field3", 99);
field4 = (String) pfields.get("field4", "Default string");
try {
String[] tserialPersistentFields =
(String[])pfields.get("serialPersistentFields", null);
System.out.println("Passes test 3");
} catch(IllegalArgumentException e) {
throw new Error("non-static field: " +
"serialPersistentFields must be in the persistent stream");
}
}
};
class TestClass4 implements Serializable {
// Correct format
private static final ObjectStreamField[] serialPersistentFields = {
new ObjectStreamField("field1", Integer.class),
new ObjectStreamField("field2", Double.TYPE),
};
Integer field1;
double field2;
int field3;
String field4;
public TestClass4(Integer f1, double f2, int f3, String f4) {
field1 = f1;
field2 = f2;
field3 = f3;
field4 = f4;
}
private void readObject(ObjectInputStream ois)
throws IOException, ClassNotFoundException {
ObjectInputStream.GetField pfields = ois.readFields();
field1 = (Integer) pfields.get("field1", new Integer(100));
field2 = pfields.get("field2", 99.99);
try {
field3 = pfields.get("field3", 99);
throw new Error("data field: field3 in the persistent stream");
} catch(IllegalArgumentException e) {
System.out.println("Passes test 4a");
}
try {
field4 = (String) pfields.get("field4", "Default string");
throw new Error("data field: field4 in the persistent stream");
} catch(IllegalArgumentException e) {
System.out.println("Passes test 4b");
}
}
};
public class CheckModifiers {
public static void main(String[] args)
throws ClassNotFoundException, IOException{
TestClass1 tc1 = new TestClass1(new Integer(100), 25.56, 2000,
new String("Test modifiers of serialPersistentFields"));
TestClass2 tc2 = new TestClass2(new Integer(100), 25.56, 2000,
new String("Test modifiers of serialPersistentFields"));
TestClass3 tc3 = new TestClass3(new Integer(100), 25.56, 2000,
new String("Test Type of serialPersistentFields"));
TestClass4 tc4 = new TestClass4(new Integer(100), 25.56, 2000,
new String("Test modifiers of serialPersistentFields"));
FileOutputStream fos = new FileOutputStream("fields.ser");
try {
ObjectOutputStream oos = new ObjectOutputStream(fos);
System.out.println("Writing obj 1");
oos.writeObject(tc1);
System.out.println("Writing obj 2");
oos.writeObject(tc2);
System.out.println("Writing obj 3");
oos.writeObject(tc3);
System.out.println("Writing obj 4");
oos.writeObject(tc4);
oos.flush();
} finally {
fos.close();
}
FileInputStream fis = new FileInputStream("fields.ser");
try {
ObjectInputStream ois = new ObjectInputStream(fis);
System.out.println("Test modifiers for serialPeristentFields ");
System.out.println("---------------------------------------- ");
System.out.println("Declaration missing final modifier");
ois.readObject();
System.out.println();
System.out.println("Declaration with public instead of private access");
ois.readObject();
System.out.println();
System.out.println("Declaration with different type");
ois.readObject();
System.out.println();
System.out.println("Declaration as in specification");
ois.readObject();
} finally {
fis.close();
}
}
};