/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.tuscany.nosqldatastore.hbase;

import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.client.*;
import org.apache.tuscany.nosqldatastore.Group;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class HBaseGroup implements Group {

    private HTable table;
    private String cf;

    HBaseGroup(HTable table, String cf){
        this.table = table;
        this.cf = cf;
    }

    public void addEntry(String key, Object value) {
        Put put = new Put(key.getBytes());
        put.add(cf.getBytes(),key.getBytes(),((String)value).getBytes());    
        try {
            table.put(put);
            table.flushCommits();
        } catch (IOException e) {
            System.out.println("Error: Adding the entry for the Key "+key);
            e.printStackTrace();
        }

    }

    public void updateEntry(String key, Object value) {
        addEntry(key,value);
    }

    public void deleteEntry(String key) {
        Delete delete = new Delete(key.getBytes());
        delete.deleteColumn(cf.getBytes(), key.getBytes());     
        try {
            table.delete(delete);
            table.flushCommits();
        } catch (IOException e) {
            System.out.println("Error: Deleting the entry for the Key "+key);
            e.printStackTrace();
        }
    }

    public Object getValue(String key) {
        Result result = null;
        Get get = new Get(key.getBytes());
        try {
            result = table.get(get);
        } catch (IOException e) {
            System.out.println("Error: Retrieving the value or the Key "+key);
            e.printStackTrace();
        }
        return new String(result.getValue(cf.getBytes(),key.getBytes()));
    }
}