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Core Hazelcast Module
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/*
 * Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hazelcast.map.impl.client;

import com.hazelcast.client.impl.client.AllPartitionsClientRequest;
import com.hazelcast.map.impl.MapPortableHook;
import com.hazelcast.map.impl.MapService;
import com.hazelcast.map.impl.operation.IsEmptyOperationFactory;
import com.hazelcast.nio.serialization.PortableReader;
import com.hazelcast.nio.serialization.PortableWriter;
import com.hazelcast.security.permission.ActionConstants;
import com.hazelcast.security.permission.MapPermission;
import com.hazelcast.spi.OperationFactory;

import java.io.IOException;
import java.security.Permission;
import java.util.Map;

public class MapIsEmptyRequest extends AllPartitionsClientRequest {

    private String name;

    public MapIsEmptyRequest() {
    }

    public MapIsEmptyRequest(String name) {
        this.name = name;
    }

    public String getServiceName() {
        return MapService.SERVICE_NAME;
    }

    @Override
    public int getFactoryId() {
        return MapPortableHook.F_ID;
    }

    public int getClassId() {
        return MapPortableHook.IS_EMPTY;
    }

    public void write(PortableWriter writer) throws IOException {
        writer.writeUTF("n", name);
    }

    public void read(PortableReader reader) throws IOException {
        name = reader.readUTF("n");
    }

    @Override
    protected OperationFactory createOperationFactory() {
        return new IsEmptyOperationFactory(name);
    }

    @Override
    protected Object reduce(Map map) {
        MapService mapService = getService();
        for (Object result : map.values()) {
            boolean isEmpty = (Boolean) mapService.getMapServiceContext().toObject(result);
            if (!isEmpty) {
                return false;
            }
        }
        return true;
    }

    public Permission getRequiredPermission() {
        return new MapPermission(name, ActionConstants.ACTION_READ);
    }

    @Override
    public String getDistributedObjectName() {
        return name;
    }

    @Override
    public String getMethodName() {
        return "isEmpty";
    }

}