/*

 * 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 */

package com.sun.beans.introspect;

import java.lang.reflect.Method;

import java.lang.reflect.Modifier;

import java.lang.reflect.Type;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;

final class MethodInfo {

    final Method method;

    final Class<?> type;

    MethodInfo(Method method, Class<?> type) {

        this.method = method;

        this.type = type;

    }

    MethodInfo(Method method, Type type) {

        this.method = method;

        this.type = resolve(method, type);

    }

    boolean isThrow(Class<?> exception) {

        for (Class<?> type : this.method.getExceptionTypes()) {

            if (type == exception) {

                return true;

            }

        }

        return false;

    }

    static Class<?> resolve(Method method, Type type) {

        return TypeResolver.erase(TypeResolver.resolveInClass(method.getDeclaringClass(), type));

    }

    static List<Method> get(Class<?> type) {

        List<Method> list = null;

        if (type != null) {

            boolean inaccessible = !Modifier.isPublic(type.getModifiers());

            for (Method method : type.getMethods()) {

                if (method.getDeclaringClass().equals(type)) {

                    if (inaccessible) {

                        try {

                            method = MethodFinder.findAccessibleMethod(method);

                            if (!method.getDeclaringClass().isInterface()) {

                                method = null; // ignore methods from superclasses

                            }

                        } catch (NoSuchMethodException exception) {

                            // commented out because of 6976577

                            // method = null; // ignore inaccessible methods

                        }

                    }

                    if (method != null) {

                        if (list == null) {

                            list = new ArrayList<>();

                        }

                        list.add(method);

                    }

                }

            }

        }

        if (list != null) {

            list.sort(MethodOrder.instance);

            return Collections.unmodifiableList(list);

        }

        return Collections.emptyList();

    }

    /**

     * A comparator that defines a total order so that methods have the same

     * name and identical signatures appear next to each others. The methods are

     * sorted in such a way that methods which override each other will sit next

     * to each other, with the overridden method last - e.g. is Integer getFoo()

     * placed before Object getFoo().

     **/

    private static final class MethodOrder implements Comparator<Method> {

        /*

         * Code particularly was copied from com.sun.jmx.mbeanserver.MethodOrder

         */

        @Override

        public int compare(final Method a, final Method b) {

            int cmp = a.getName().compareTo(b.getName());

            if (cmp != 0) {

                return cmp;

            }

            final Class<?>[] aparams = a.getParameterTypes();

            final Class<?>[] bparams = b.getParameterTypes();

            if (aparams.length != bparams.length) {

                return aparams.length - bparams.length;

            }

            for (int i = 0; i < aparams.length; ++i) {

                final Class<?> aparam = aparams[i];

                final Class<?> bparam = bparams[i];

                if (aparam == bparam) {

                    continue;

                }

                cmp = aparam.getName().compareTo(bparam.getName());

                if (cmp != 0) {

                    return cmp;

                }

            }

            final Class<?> aret = a.getReturnType();

            final Class<?> bret = b.getReturnType();

            if (aret == bret) {

                return 0;

            }

            // Super type comes last: Integer, Number, Object

            if (aret.isAssignableFrom(bret)) {

                return 1;

            }

        }

        static final MethodOrder instance = new MethodOrder();

    }

}