/tags/release-0.0.0-rc0/hive/external/ql/src/java/org/apache/hadoop/hive/ql/exec/BinaryRecordReader.java
Java | 64 lines | 33 code | 9 blank | 22 comment | 3 complexity | b9070fcb60d50e83f671838c0e17f9ba MD5 | raw file
Possible License(s): Apache-2.0, BSD-3-Clause, JSON, CPL-1.0
- /**
- * 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.hadoop.hive.ql.exec;
- import java.io.IOException;
- import java.io.InputStream;
- import java.util.Properties;
- import org.apache.hadoop.conf.Configuration;
- import org.apache.hadoop.io.BytesWritable;
- import org.apache.hadoop.io.Writable;
- /**
- * Read from a binary stream and treat each 1000 bytes (configurable via
- * hive.binary.record.max.length) as a record. The last record before the
- * end of stream can have less than 1000 bytes.
- */
- public class BinaryRecordReader implements RecordReader {
- private InputStream in;
- private BytesWritable bytes;
- private int maxRecordLength;
- public void initialize(InputStream in, Configuration conf, Properties tbl) throws IOException {
- this.in = in;
- maxRecordLength = conf.getInt("hive.binary.record.max.length", 1000);
- }
- public Writable createRow() throws IOException {
- bytes = new BytesWritable();
- bytes.setCapacity(maxRecordLength);
- return bytes;
- }
- public int next(Writable row) throws IOException {
- int recordLength = in.read(bytes.get(), 0, maxRecordLength);
- if (recordLength >= 0) {
- bytes.setSize(recordLength);
- }
- return recordLength;
- }
- public void close() throws IOException {
- if (in != null) {
- in.close();
- }
- }
- }