cc.solr.lucene.store.hdfs.HdfsMetaBlock.java Source code

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Here is the source code for cc.solr.lucene.store.hdfs.HdfsMetaBlock.java

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package cc.solr.lucene.store.hdfs;

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

import org.apache.hadoop.io.Writable;

class HdfsMetaBlock implements Writable {
    long logicalPosition;
    long realPosition;
    long length;

    @Override
    public void readFields(DataInput in) throws IOException {
        logicalPosition = in.readLong();
        realPosition = in.readLong();
        length = in.readLong();
    }

    @Override
    public void write(DataOutput out) throws IOException {
        out.writeLong(logicalPosition);
        out.writeLong(realPosition);
        out.writeLong(length);
    }

    boolean containsDataAt(long logicalPos) {
        if (logicalPos >= logicalPosition && logicalPos < logicalPosition + length) {
            return true;
        }
        return false;
    }

    long getRealPosition(long logicalPos) {
        long offset = logicalPos - logicalPosition;
        long pos = realPosition + offset;
        return pos;
    }

    @Override
    public String toString() {
        return "HdfsMetaBlock [length=" + length + ", logicalPosition=" + logicalPosition + ", realPosition="
                + realPosition + "]";
    }
}