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23 
24 /*
25 @test
26 @bug 8004970
27 @summary Lambda serialization
28 */
29 
30 import java.io.*;
31 
32 public class LambdaSerialization {
33 
34     static int assertionCount = 0;
35 
assertTrue(boolean cond)36     static void assertTrue(boolean cond) {
37         assertionCount++;
38         if (!cond)
39             throw new AssertionError();
40     }
41 
main(String[] args)42     public static void main(String[] args) throws Exception {
43         try {
44             // Write lambdas out
45             ByteArrayOutputStream baos = new ByteArrayOutputStream();
46             ObjectOutput out = new ObjectOutputStream(baos);
47 
48             write(out, z -> "[" + z + "]" );
49             write(out, z -> z + z );
50             write(out, z -> "blah" );
51             out.flush();
52             out.close();
53 
54             // Read them back
55             ByteArrayInputStream bais =
56                 new ByteArrayInputStream(baos.toByteArray());
57             ObjectInputStream in = new ObjectInputStream(bais);
58             readAssert(in, "[X]");
59             readAssert(in, "XX");
60             readAssert(in, "blah");
61             in.close();
62         } catch (IOException e) {
63             e.printStackTrace();
64             throw e;
65         }
66         assertTrue(assertionCount == 3);
67     }
68 
write(ObjectOutput out, LSI lamb)69     static void write(ObjectOutput out, LSI lamb) throws IOException {
70         out.writeObject(lamb);
71     }
72 
readAssert(ObjectInputStream in, String expected)73     static void readAssert(ObjectInputStream in, String expected)  throws IOException, ClassNotFoundException {
74         LSI ls = (LSI) in.readObject();
75         String result = ls.convert("X");
76         System.out.printf("Result: %s\n", result);
77         assertTrue(result.equals(expected));
78     }
79 }
80 
81 interface LSI extends Serializable {
convert(String x)82     String convert(String x);
83 }
84