Mercurial > jdk8-mips64-public > langtools / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/test/tools/javac/lambda/lambdaExecution/TPredicate.java	Wed Apr 27 01:34:52 2016 +0800
     1.3 @@ -0,0 +1,64 @@
     1.4 +/*
     1.5 + * Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.  Oracle designates this
    1.11 + * particular file as subject to the "Classpath" exception as provided
    1.12 + * by Oracle in the LICENSE file that accompanied this code.
    1.13 + *
    1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.16 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.17 + * version 2 for more details (a copy is included in the LICENSE file that
    1.18 + * accompanied this code).
    1.19 + *
    1.20 + * You should have received a copy of the GNU General Public License version
    1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.23 + *
    1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    1.25 + * or visit www.oracle.com if you need additional information or have any
    1.26 + * questions.
    1.27 + */
    1.28 +
    1.29 +/**
    1.30 + * Determines if the input object matches some criteria.
    1.31 + *
    1.32 + * <p>All predicate implementations are expected to:
    1.33 + * <ul>
    1.34 + *  <li>Provide stable results such that for any {@code t} the result of two
    1.35 + * {@code eval} operations are always equivalent. ie.<pre>
    1.36 + * boolean one = predicate.test(a);
    1.37 + * boolean two = predicate.test(a);
    1.38 + *
    1.39 + * assert one == two;
    1.40 + * </pre></li>
    1.41 + * <li>Equivalent input objects should map to equivalent output objects. ie.<pre>
    1.42 + * assert a.equals(b);  // a and b are equivalent
    1.43 + *
    1.44 + * boolean x = predicate.test(a);
    1.45 + * boolean y = predicate.test(ab;
    1.46 + *
    1.47 + * assert x == y; // their test results should be the same.
    1.48 + * </pre></li>
    1.49 + * <li>The predicate should not modify the input object in any way that would
    1.50 + * change the evaluation.</li>
    1.51 + * <li>When used for aggregate operations upon many elements predicates
    1.52 + * should not assume that the {@code test} operation will be called upon
    1.53 + * elements in any specific order.</li>
    1.54 + * </ul>
    1.55 + *
    1.56 + * @param <T> the type of input objects provided to {@code test}.
    1.57 + */
    1.58 +public interface TPredicate<T> {
    1.59 +
    1.60 +    /**
    1.61 +     * Return {@code true} if the input object matches some criteria.
    1.62 +     *
    1.63 +     * @param t the input object.
    1.64 +     * @return {@code true} if the input object matched some criteria.
    1.65 +     */
    1.66 +     boolean test(T t);
    1.67 +}