hivemall.utils.hadoop.Text3.java Source code

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Here is the source code for hivemall.utils.hadoop.Text3.java

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/*
 * Hivemall: Hive scalable Machine Learning Library
 *
 * Copyright (C) 2015 Makoto YUI
 *
 * 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 hivemall.utils.hadoop;

import javax.annotation.Nonnull;

import org.apache.hadoop.hive.ql.udf.generic.UDTFCollector;
import org.apache.hadoop.io.Text;

/**
 * {@link Text} passed to {@link UDTFCollector#collect(Object)}. It releases a given byte array
 * after copying the byte array.
 */
public final class Text3 extends Text {

    @Nonnull
    private/* final */byte[] buf;
    private final int len;

    public Text3(@Nonnull byte[] b) {
        this(b, b.length);
    }

    public Text3(@Nonnull byte[] b, int len) {
        super();
        this.buf = b;
        this.len = len;
    }

    @Override
    public byte[] getBytes() {
        if (buf == null) {
            throw new IllegalStateException("Text2#getBytes() SHOULD NOT be called twice");
        }
        byte[] b = buf;
        this.buf = null;
        return b;
    }

    @Override
    public int getLength() {
        return len;
    }

}