org.apache.reef.io.checkpoint.fs.FSCheckpointID.java Source code

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Here is the source code for org.apache.reef.io.checkpoint.fs.FSCheckpointID.java

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/**
 * 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.reef.io.checkpoint.fs;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.reef.io.checkpoint.CheckpointID;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

/**
 * A FileSystem based checkpoint ID contains reference to the Path
 * where the checkpoint has been saved.
 */
public class FSCheckpointID implements CheckpointID {

    private Path path;

    public FSCheckpointID() {
    }

    public FSCheckpointID(Path path) {
        this.path = path;
    }

    public Path getPath() {
        return path;
    }

    @Override
    public String toString() {
        return path.toString();
    }

    @Override
    public void write(DataOutput out) throws IOException {
        Text.writeString(out, path.toString());
    }

    @Override
    public void readFields(DataInput in) throws IOException {
        this.path = new Path(Text.readString(in));
    }

    @Override
    public boolean equals(Object other) {
        return other instanceof FSCheckpointID && path.equals(((FSCheckpointID) other).path);
    }

    @Override
    public int hashCode() {
        return path.hashCode();
    }

}