com.sm.replica.ParaList.java Source code

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Here is the source code for com.sm.replica.ParaList.java

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/*
 *
 *
 * Copyright 2012-2015 Viant.
 *
 * 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.sm.replica;

import com.sm.store.StoreParas;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.io.Serializable;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;

import static com.sm.store.StoreParas.putInt;
import static com.sm.store.StoreParas.toStoreParas;

public class ParaList implements Serializable {
    private static final Log logger = LogFactory.getLog(ParaList.class);

    private int size;
    private List<StoreParas> lists;

    public ParaList(List<StoreParas> lists) {
        if (lists == null)
            throw new RuntimeException("lists can not be null");
        this.lists = lists;
        this.size = lists.size();

    }

    public int getSize() {
        return size;
    }

    public List<StoreParas> getLists() {
        return lists;
    }

    public void setLists(List<StoreParas> lists) {
        this.lists = lists;
        this.size = lists.size();
    }

    public byte[] toBytes() {
        // int len + byte[]
        int total = 4 * (size + 1);
        byte[][] bytes = new byte[size][];
        for (int i = 0; i < size; i++) {
            bytes[i] = lists.get(i).toBytes();
            total += bytes[i].length;
        }
        byte[] toReturn = new byte[total];
        int pos = 0;
        System.arraycopy(putInt(size), 0, toReturn, 0, 4);
        pos += 4;
        for (int i = 0; i < size; i++) {
            System.arraycopy(putInt(bytes[i].length), 0, toReturn, pos, 4);
            pos += 4;
            System.arraycopy(bytes[i], 0, toReturn, pos, bytes[i].length);
            pos += bytes[i].length;
        }
        return toReturn;
    }

    public static ParaList toParaList(byte[] bytes) {
        ByteBuffer buf = ByteBuffer.wrap(bytes);
        int size = buf.getInt();
        ArrayList<StoreParas> list = new ArrayList<StoreParas>(size);
        for (int i = 0; i < size; i++) {
            // length of StoreParas
            int s = buf.getInt();
            byte[] ds = new byte[s];
            buf.get(ds);
            list.add(toStoreParas(ds));

        }
        return new ParaList(list);

    }
}