/*
 * The MIT License (MIT)
 *
 * Copyright 2017 Alexander Orlov <alexander.orlov@loxal.net>. All rights reserved.
 * Copyright (c) [2016] [ <ether.camp> ]
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */

package org.ethereum.vm.program.listener

import org.ethereum.vm.DataWord
import java.util.*


class CompositeProgramListener : ProgramListener {

    private val listeners = ArrayList<ProgramListener>()

    override fun onMemoryExtend(delta: Int) {
        for (listener in listeners) {
            listener.onMemoryExtend(delta)
        }
    }

    override fun onMemoryWrite(address: Int, data: ByteArray, size: Int) {
        for (listener in listeners) {
            listener.onMemoryWrite(address, data, size)
        }
    }

    override fun onStackPop() {
        for (listener in listeners) {
            listener.onStackPop()
        }
    }

    override fun onStackPush(value: DataWord) {
        for (listener in listeners) {
            listener.onStackPush(value)
        }
    }

    override fun onStackSwap(from: Int, to: Int) {
        for (listener in listeners) {
            listener.onStackSwap(from, to)
        }
    }

    override fun onStoragePut(key: DataWord, value: DataWord) {
        for (listener in listeners) {
            listener.onStoragePut(key, value)
        }
    }

    override fun onStorageClear() {
        for (listener in listeners) {
            listener.onStorageClear()
        }
    }

    fun addListener(listener: ProgramListener) {
        listeners.add(listener)
    }

    val isEmpty: Boolean
        get() = listeners.isEmpty()
}
