/*
 * Copyright (c) 2014, 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.
 */
package com.oracle.graal.compiler.common.remote;

import java.lang.reflect.*;
import java.util.*;
import java.util.stream.*;

class Invocation {
    final Method method;
    final Object receiver;
    final Object[] args;

    public Invocation(Method method, Object receiver, Object[] args) {
        this.method = method;
        this.receiver = receiver;
        this.args = args;
    }

    @Override
    public String toString() {
        String res = receiver.getClass().getSimpleName() + "@" + System.identityHashCode(receiver) + "." + method.getName();
        if (args == null) {
            return res + "()";
        }
        return res + "(" + Arrays.asList(args).stream().map(o -> String.valueOf(o)).collect(Collectors.joining(", ")) + ")";
    }

    public Object invoke() {
        try {
            if (args == null) {
                return method.invoke(receiver);
            } else {
                return method.invoke(receiver, args);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof Invocation) {
            Invocation that = (Invocation) obj;
            assert that.receiver == receiver;
            return that.method.equals(this.method) && Arrays.equals(that.args, this.args);

        }
        return false;
    }

    @Override
    public int hashCode() {
        if (args == null) {
            return method.hashCode();
        }
        return method.hashCode() ^ args.length;
    }
}