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1 /* |
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 /* |
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25 * @test |
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26 * @bug 8003280 |
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27 * @summary Add lambda tests |
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28 * SAM types and method type inference |
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29 * @author Brian Goetz |
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30 * @author Maurizio Cimadamore |
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31 * @run main LambdaConv03 |
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32 */ |
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33 |
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34 public class LambdaConv03 { |
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35 |
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36 static int assertionCount = 0; |
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37 |
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38 static void assertTrue(boolean cond) { |
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39 assertionCount++; |
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40 if (!cond) |
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41 throw new AssertionError(); |
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42 } |
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43 |
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44 interface TU<T, U> { |
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45 public T foo(U u); |
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46 } |
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47 |
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48 public static <T, U> T exec(TU<T, U> lambda, U x) { |
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49 return lambda.foo(x); |
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50 } |
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51 |
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52 static { |
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53 //Covariant returns: |
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54 int i1 = exec((Integer x) -> { return x; }, 3); |
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55 assertTrue(3 == i1); |
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56 //Method resolution with boxing: |
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57 int i2 = exec((Integer x) -> { return x; }, 3); |
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58 assertTrue(3 == i2); |
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59 //Runtime exception transparency: |
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60 try { |
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61 exec((Object x) -> { return x.hashCode(); }, null); |
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62 } |
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63 catch (RuntimeException e) { |
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64 assertTrue(true); |
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65 } |
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66 } |
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67 |
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68 { |
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69 //Covariant returns: |
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70 int i1 = exec((Integer x) -> { return x; }, 3); |
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71 assertTrue(3 == i1); |
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72 //Method resolution with boxing: |
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73 int i2 = exec((Integer x) -> { return x; }, 3); |
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74 assertTrue(3 == i2); |
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75 //Runtime exception transparency: |
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76 try { |
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77 exec((Object x) -> { return x.hashCode(); }, null); |
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78 } |
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79 catch (RuntimeException e) { |
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80 assertTrue(true); |
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81 } |
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82 } |
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83 |
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84 public static void test1() { |
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85 //Covariant returns: |
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86 int i1 = exec((Integer x) -> { return x; }, 3); |
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87 assertTrue(3 == i1); |
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88 //Method resolution with boxing: |
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89 int i2 = exec((Integer x) -> { return x; }, 3); |
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90 assertTrue(3 == i2); |
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91 //Runtime exception transparency: |
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92 try { |
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93 exec((Object x) -> { return x.hashCode(); }, null); |
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94 } |
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95 catch (RuntimeException e) { |
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96 assertTrue(true); |
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97 } |
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98 } |
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99 |
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100 public void test2() { |
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101 //Covariant returns: |
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102 int i1 = exec((Integer x) -> { return x; }, 3); |
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103 assertTrue(3 == i1); |
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104 //Method resolution with boxing: |
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105 int i2 = exec((Integer x) -> { return x; }, 3); |
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106 assertTrue(3 == i2); |
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107 //Runtime exception transparency: |
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108 try { |
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109 exec((Object x) -> { return x.hashCode(); }, null); |
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110 } |
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111 catch (RuntimeException e) { |
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112 assertTrue(true); |
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113 } |
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114 } |
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115 |
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116 public static void main(String[] args) { |
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117 test1(); |
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118 new LambdaConv03().test2(); |
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119 assertTrue(assertionCount == 12); |
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120 } |
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121 } |