/*

 * Copyright (c) 2015, 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.

 */

import jdk.test.lib.Pair;

import java.lang.reflect.Executable;

import java.util.ArrayList;

import java.util.List;

import java.util.concurrent.Callable;

import java.util.function.Predicate;

import java.util.stream.Collectors;

/**

 * This is a helper class that provides tests with methods

 */

public class PoolHelper extends MethodHolder {

    private static final List<Pair<Executable, Callable<?>>> METHODS;

    /**

     * Filters only those methods who belong to Klass or its internal class

     * Internal and named as "method" or is a constructor

     */

    public static final Predicate<Executable> METHOD_FILTER = executable -> {

        String methodName = executable.getName();

        String className = executable.getDeclaringClass().getName();

        return className.matches(".*(Klass)(\\$Internal)?") &&

                (methodName.equals("method") ||

                        methodName.equals(className)); // if method is <init>

    };

    static {

        METHODS = new ArrayList<>();

        List<MethodHolder> holders = new ArrayList<>();

        for (MethodHolder holder : holders) {

            METHODS.addAll(holder.getAllMethods());

        }

    }

    /**

     * Gets all methods from the pool using specified filter

     *

     * @param filter method filter

     * @return pairs of Executable and appropriate Callable

     */

    public List<Pair<Executable, Callable<?>>> getAllMethods(

            Predicate<Executable> filter) {

        return getAllMethods().stream()

                .filter(pair -> filter.test(pair.first))

                .collect(Collectors.toList());

    }

    /**

     * Gets all methods from the pool

     *

     * @return pairs of Executable and appropriate Callable

     */

    @Override

    public List<Pair<Executable, Callable<?>>> getAllMethods() {

        return METHODS;

    }

}