org.apache.hadoop.hive.ql.exec.TextRecordReader Maven / Gradle / Ivy
/**
* 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.Text;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.mapred.LineRecordReader.LineReader;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.ql.metadata.HiveUtils;
/**
* TextRecordReader.
*
*/
public class TextRecordReader implements RecordReader {
private LineReader lineReader;
private InputStream in;
private Text row;
private Configuration conf;
public void initialize(InputStream in, Configuration conf, Properties tbl)
throws IOException {
lineReader = new LineReader(in, conf);
this.in = in;
this.conf = conf;
}
public Writable createRow() throws IOException {
row = new Text();
return row;
}
public int next(Writable row) throws IOException {
if (lineReader == null) {
return -1;
}
int bytesConsumed = lineReader.readLine((Text) row);
if (HiveConf.getBoolVar(conf, HiveConf.ConfVars.HIVESCRIPTESCAPE)) {
return HiveUtils.unescapeText((Text) row);
}
return bytesConsumed;
}
public void close() throws IOException {
if (in != null) {
in.close();
}
}
}