com.dasasian.chok.lucene.QueryWritable.java Source code

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Here is the source code for com.dasasian.chok.lucene.QueryWritable.java

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/**
 * Copyright (C) 2014 Dasasian (damith@dasasian.com)
 *
 * 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.dasasian.chok.lucene;

import org.apache.hadoop.io.Writable;
import org.apache.lucene.search.Query;

import java.io.*;

public class QueryWritable implements Writable {

    private Query _query;

    public QueryWritable() {
        // for serialization
    }

    public QueryWritable(Query query) {
        _query = query;

    }

    @Override
    public void readFields(DataInput input) throws IOException {
        int readInt = input.readInt();
        byte[] bs = new byte[readInt];
        input.readFully(bs);
        ObjectInputStream objectStream = new ObjectInputStream(new ByteArrayInputStream(bs));
        try {
            _query = (Query) objectStream.readObject();
        } catch (ClassNotFoundException e) {
            throw new IOException("Unable to deseriaize lucene query", e);
        }

    }

    @Override
    public void write(DataOutput output) throws IOException {
        ByteArrayOutputStream byteArrayStream = new ByteArrayOutputStream();
        ObjectOutputStream objectStream = new ObjectOutputStream(byteArrayStream);
        objectStream.writeObject(_query);
        objectStream.close();
        byte[] byteArray = byteArrayStream.toByteArray();
        output.writeInt(byteArray.length);
        output.write(byteArray);
    }

    public Query getQuery() {
        return _query;
    }

    @Override
    public boolean equals(Object obj) {
        if (getClass() != obj.getClass()) {
            return false;
        }
        Query other = ((QueryWritable) obj).getQuery();
        return _query.equals(other);
    }

    @Override
    public String toString() {
        return _query != null ? _query.toString() : "null";
    }

}