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23 
24 /*
25  * @test
26  * @bug 8009582
27  * @summary Method reference generic constructor gives: IllegalArgumentException: Invalid lambda deserialization
28  * @author  Robert Field
29  * @run main GenericMethodRefImplClass
30  */
31 
32 import java.io.*;
33 import java.util.*;
34 
35 public class GenericMethodRefImplClass {
36 
37     static int assertionCount = 0;
38 
assertTrue(boolean cond)39     static void assertTrue(boolean cond) {
40         assertionCount++;
41         if (!cond)
42             throw new AssertionError();
43     }
44 
main(String[] args)45     public static void main(String[] args) throws Exception {
46         try {
47             // Write lambdas out
48             ByteArrayOutputStream baos = new ByteArrayOutputStream();
49             ObjectOutput out = new ObjectOutputStream(baos);
50 
51             write(out, HashMap::new );
52             out.flush();
53             out.close();
54 
55             // Read them back
56             ByteArrayInputStream bais =
57                 new ByteArrayInputStream(baos.toByteArray());
58             ObjectInputStream in = new ObjectInputStream(bais);
59             readIt(in);
60             in.close();
61         } catch (IOException e) {
62             e.printStackTrace();
63             throw e;
64         }
65         assertTrue(assertionCount == 1);
66     }
67 
write(ObjectOutput out, GenericMethodRefImplClassLSI lamb)68     static void write(ObjectOutput out, GenericMethodRefImplClassLSI lamb) throws IOException {
69         out.writeObject(lamb);
70     }
71 
readIt(ObjectInputStream in)72     static void readIt(ObjectInputStream in)  throws IOException, ClassNotFoundException {
73         GenericMethodRefImplClassLSI ls = (GenericMethodRefImplClassLSI) in.readObject();
74         Map result = ls.convert();
75         assertTrue(result.getClass().getName().equals("java.util.HashMap"));
76     }
77 }
78 
79 interface GenericMethodRefImplClassLSI extends Serializable {
convert()80     Map convert();
81 }
82