jdk8-mips64-public/langtools: test/tools/javac/lambda/funcInterfaces/LambdaTest2

test/tools/javac/lambda/funcInterfaces/LambdaTest2_SAM2.java@c09b7234cded (annotated)

test/tools/javac/lambda/funcInterfaces/LambdaTest2_SAM2.java

Tue, 14 May 2013 11:11:09 -0700

author: rfield
date: Tue, 14 May 2013 11:11:09 -0700
changeset 1752: c09b7234cded
parent 0: 959103a6100f
permissions: -rw-r--r--

8012556: Implement lambda methods on interfaces as static
8006140: Javac NPE compiling Lambda expression on initialization expression of static field in interface
Summary: Lambdas occurring in static contexts or those not needing instance information should be generated into static methods. This has long been the case for classes. However, as a work-around to the lack of support for statics on interfaces, interface lambda methods have been generated into default methods. For lambdas in interface static contexts (fields and static methods) this causes an NPE in javac because there is no 'this'. MethodHandles now support static methods on interfaces. This changeset allows lambda methods to be generated as static interface methods. An existing bug in Hotspot (8013875) is exposed in a test when the "-esa" flag is used. This test and another test that already exposed this bug have been marked with @ignore.
Reviewed-by: mcimadamore

 /*
  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 /**
  * @test
  * @bug 8003280
  * @summary Add lambda tests
  *   This test is for identifying SAM types #4, see Helper.java for SAM types
  * @compile LambdaTest2_SAM2.java Helper.java
  * @run main LambdaTest2_SAM2
  */
 import java.util.Collection;
 import java.util.List;
 import java.util.ArrayList;
 import java.util.concurrent.TimeoutException;
 import java.io.*;
 import java.sql.SQLException;
 import java.sql.SQLTransientException;
 public class LambdaTest2_SAM2 {
     private static List<String> strs = new ArrayList<String>();
     public static void main(String[] args) {
         strs.add("copy");
         strs.add("paste");
         strs.add("delete");
         strs.add("rename");
         LambdaTest2_SAM2 test = new LambdaTest2_SAM2();
         //type #4 a):
         test.methodAB((List list) -> 100);
         //type #4 b):
         test.methodFGHI((String s) -> new Integer(22));
         //type #4 b):
         test.methodJK((String s) -> new ArrayList<Number>());
         test.methodJK((String s) -> new ArrayList());
         //type #4 b):
         test.methodJL((String s) -> new ArrayList<Number>());
         test.methodJL((String s) -> new ArrayList());
         //type #4 b):
         test.methodJKL((String s) -> new ArrayList<Number>());
         test.methodJKL((String s) -> new ArrayList());
         //type #4 b):
         test.methodJKLM((String s) -> new ArrayList<Number>());
         test.methodJKLM((String s) -> new ArrayList());
         // tyep #4 c):
         test.methodNO((File f) -> {
                 String temp = null;
                 StringBuffer sb = new StringBuffer();
                 try
                 {
                     BufferedReader br = new BufferedReader(new FileReader(f));
                     while((temp=br.readLine()) != null)
                         sb.append(temp).append("\n");
                 }
                 catch(FileNotFoundException fne){throw fne;}
                 catch(IOException e){e.printStackTrace();}
                 return sb.toString();
         });
         // tyep #4 c):
         test.methodNOP((File f) -> {
                 String temp = null;
                 StringBuffer sb = new StringBuffer();
                 try
                 {
                     BufferedReader br = new BufferedReader(new FileReader(f));
                     while((temp=br.readLine()) != null)
                         sb.append(temp).append("\n");
                 }
                 catch(IOException e){e.printStackTrace();}
                 return sb.toString();
         });
         // type #4 c):
         test.methodBooDoo((String s) -> s.length());
         //type #4 d):
         test.methodQR((Iterable i) -> new ArrayList<String>());
         test.methodQR((Iterable i) -> new ArrayList());
         //type #4 d):
         test.methodUV((List<String> list) -> {
                 test.exceptionMethod1();
                 test.exceptionMethod2();
                 return new ArrayList<String>();
         });
         test.methodUV((List<String> list) -> {
                 test.exceptionMethod1();
                 test.exceptionMethod2();
                 return new ArrayList();
         });
         //type #4 d):
         test.methodUVW((List list) -> {
                 test.exceptionMethod1();
                 test.exceptionMethod2();
                 return new ArrayList<String>();
         });
         test.methodUVW((List list) -> {
                 test.exceptionMethod1();
                 test.exceptionMethod2();
                 return new ArrayList();
         });
     }
     private void exceptionMethod1() throws EOFException{
     }
     private void exceptionMethod2() throws SQLTransientException{
     }
     //type #4 a): SAM type ([List], int, {})
     void methodAB (AB ab) {
         System.out.println("methodAB(): SAM type interface AB object instantiated: " + ab);
         System.out.println(ab.getOldest(strs));
     }
     //type #4 b): SAM type ([String], Integer, {})
     void methodFGHI(FGHI f) {
         System.out.println("methodFGHI(): SAM type interface FGHI object instantiated: " + f);
         System.out.println(f.getValue("str"));
     }
     //type #4 b): SAM type ([String], List<Number>, {})
     void methodJK(JK jk) {
         System.out.println("methodJK(): SAM type interface JK object instantiated: " + jk);
         for(Number n : jk.getAll("in"))
             System.out.println(n);
     }
     //type #4 b): SAM type ([String], List<Number>, {})
     void methodJL(JL jl) {
         System.out.println("methodJL(): SAM type interface JL object instantiated: " + jl);
         for(Number n : ((J)jl).getAll("in")) //cast should be redundant - see 7062745
             System.out.println(n);
     }
     //type #4 b): SAM type ([String], List<Number>, {})
     void methodJKL(JKL jkl) { //commented - see 7062745
         System.out.println("methodJKL(): SAM type interface JKL object instantiated: " + jkl);
         for(Number n : ((J)jkl).getAll("in"))
             System.out.println(n);
     }
     //type #4 b): SAM type ([String], List<Number>, {})
     void methodJKLM(JKLM jklm) { //commented - see 7062745
         System.out.println("methodJKLM(): SAM type interface JKLM object instantiated: " + jklm);
         for(Number n : ((J)jklm).getAll("in"))
             System.out.println(n);
     }
     //type #4 c): SAM type ([File], String, {FileNotFoundException})
     void methodNO(NO no) {
         System.out.println("methodNO(): SAM type interface \"NO\" object instantiated: " + no);
         try {
             System.out.println("text=" + no.getText(new File("a.txt")));
             System.out.println("got here, no exception thrown");
         }
         catch(FileNotFoundException e){e.printStackTrace();}
     }
     //type #4 c): SAM type ([File]), String, {})
     void methodNOP(NOP nop) {
         System.out.println("methodNOP(): SAM type interface \"NOP\" object instantiated: " + nop);
         System.out.println("text=" + nop.getText(new File("a.txt")));
     }
     //type #4 c): SAM type ([String], int, {})
     void methodBooDoo(BooDoo bd) {
         System.out.println("methodBooDoo(): SAM type interface BooDoo object instantiated: " + bd);
         System.out.println("result=" + bd.getAge("lambda"));
     }
     //type #4 d): SAM type ([Iterable], Iterable<String>, {})
     void methodQR(QR qr) {
         System.out.println("methodQR(): SAM type interface QR object instantiated: " + qr);
         System.out.println("Iterable returned: " + qr.m(new SQLException()));
     }
     //type #4 d): SAM type ([List<String>], List<String>/List, {EOFException, SQLTransientException})
     void methodUV(UV uv) {
         System.out.println("methodUV(): SAM type interface UV object instantiated: " + uv);
         try{
             System.out.println("result returned: " + uv.foo(strs));
         }catch(EOFException e){
             System.out.println(e.getMessage());
         }catch(SQLTransientException ex){
             System.out.println(ex.getMessage());
         }
     }
     //type #4 d): SAM type ([List], List<String>/List, {EOFException, SQLTransientException})
     void methodUVW(UVW uvw) {
         System.out.println("methodUVW(): SAM type interface UVW object instantiated: " + uvw);
         try{
             System.out.println("passing List<String>: " + uvw.foo(strs));
             System.out.println("passing List: " + uvw.foo(new ArrayList()));
         }catch(EOFException e){
             System.out.println(e.getMessage());
         }catch(SQLTransientException ex){
             System.out.println(ex.getMessage());
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

test/tools/javac/lambda/funcInterfaces/LambdaTest2_SAM2.java@c09b7234cded (annotated)

test/tools/javac/lambda/funcInterfaces/LambdaTest2_SAM2.java