/*

 * Copyright (c) 2010, 2013, 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.  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.

 */

/*

 * This file is available under and governed by the GNU General Public

 * License version 2 only, as published by the Free Software Foundation.

 * However, the following notice accompanied the original version of this

 * file, and Oracle licenses the original version of this file under the BSD

 * license:

 */

/*

   Copyright 2009-2013 Attila Szegedi

*/

package jdk.dynalink.beans;

import java.lang.invoke.MethodHandle;

import java.lang.invoke.MethodHandles;

import java.lang.invoke.MethodType;

import java.util.HashMap;

import java.util.Map;

class StaticClassIntrospector extends FacetIntrospector {

    StaticClassIntrospector(final Class<?> clazz) {

        super(clazz, false);

    }

    @Override

    Map<String, MethodHandle> getInnerClassGetters() {

        final Map<String, MethodHandle> map = new HashMap<>();

        for(final Class<?> innerClass: membersLookup.getInnerClasses()) {

            map.put(innerClass.getSimpleName(), editMethodHandle(MethodHandles.constant(StaticClass.class,

                    StaticClass.forClass(innerClass))));

        }

        return map;

    }

    @Override

    MethodHandle editMethodHandle(final MethodHandle mh) {

        return editStaticMethodHandle(mh);

    }

    static MethodHandle editStaticMethodHandle(final MethodHandle mh) {

        return dropReceiver(mh, Object.class);

    }

    static MethodHandle editConstructorMethodHandle(final MethodHandle cmh) {

        return dropReceiver(cmh, StaticClass.class);

    }

    private static MethodHandle dropReceiver(final MethodHandle mh, final Class<?> receiverClass) {

        MethodHandle newHandle = MethodHandles.dropArguments(mh, 0, receiverClass);

        // NOTE: this is a workaround for the fact that dropArguments doesn't preserve vararg collector state.

        if(mh.isVarargsCollector() && !newHandle.isVarargsCollector()) {

            final MethodType type = mh.type();

            newHandle = newHandle.asVarargsCollector(type.parameterType(type.parameterCount() - 1));

        }

        return newHandle;

    }

}