ReadController.java

/*
 * Copyright 2014 Alexey Plotnik
 *
 * 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 org.stem.db;

import org.stem.domain.ExtendedBlobDescriptor;

import java.io.IOException;

public class ReadController extends IOController {

    public ReadController(MountPoint mp) {
        super(mp);
    }

    public byte[] read(Integer fatFileIndex, Integer offset, Integer length) {
        try {
            return getFatFile(fatFileIndex)
                    .readBlob(offset, length);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public ExtendedBlobDescriptor delete(Integer fatFileIndex, Integer offset) {
        try {
            return getFatFile(fatFileIndex)
                    .deleteBlob(offset);

        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}