1 /*
2 * Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
68 * <blockquote><pre>
69 * @SafeVarargs // Not actually safe!
70 * static void m(List<String>... stringLists) {
71 * Object[] array = stringLists;
72 * List<Integer> tmpList = Arrays.asList(42);
73 * array[0] = tmpList; // Semantically invalid, but compiles without warnings
74 * String s = stringLists[0].get(0); // Oh no, ClassCastException at runtime!
75 * }
76 * </pre></blockquote>
77 *
78 * leads to a {@code ClassCastException} at runtime.
79 *
80 * <p>Future versions of the platform may mandate compiler errors for
81 * such unsafe operations.
82 *
83 * </ul>
84 *
85 * @since 1.7
86 * @jls 4.7 Reifiable Types
87 * @jls 8.4.1 Formal Parameters
88 */
89 @Documented
90 @Retention(RetentionPolicy.RUNTIME)
91 @Target({ElementType.CONSTRUCTOR, ElementType.METHOD})
92 public @interface SafeVarargs {}
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1 /*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
68 * <blockquote><pre>
69 * @SafeVarargs // Not actually safe!
70 * static void m(List<String>... stringLists) {
71 * Object[] array = stringLists;
72 * List<Integer> tmpList = Arrays.asList(42);
73 * array[0] = tmpList; // Semantically invalid, but compiles without warnings
74 * String s = stringLists[0].get(0); // Oh no, ClassCastException at runtime!
75 * }
76 * </pre></blockquote>
77 *
78 * leads to a {@code ClassCastException} at runtime.
79 *
80 * <p>Future versions of the platform may mandate compiler errors for
81 * such unsafe operations.
82 *
83 * </ul>
84 *
85 * @since 1.7
86 * @jls 4.7 Reifiable Types
87 * @jls 8.4.1 Formal Parameters
88 * @jls 9.6.3.7 @SafeVarargs
89 */
90 @Documented
91 @Retention(RetentionPolicy.RUNTIME)
92 @Target({ElementType.CONSTRUCTOR, ElementType.METHOD})
93 public @interface SafeVarargs {}
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