org.apache.hadoop.hive.serde2.lazy.LazyHiveChar 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.serde2.lazy;
import java.nio.charset.CharacterCodingException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.hive.serde2.io.HiveCharWritable;
import org.apache.hadoop.hive.serde2.lazy.objectinspector.primitive.LazyHiveCharObjectInspector;
import org.apache.hadoop.hive.serde2.typeinfo.CharTypeInfo;
import org.apache.hadoop.io.Text;
/**
* LazyObject for storing a value of HiveChar.
*
*/
public class LazyHiveChar extends
LazyPrimitive {
private static final Logger LOG = LoggerFactory.getLogger(LazyHiveChar.class);
protected int maxLength = -1;
public LazyHiveChar(LazyHiveCharObjectInspector oi) {
super(oi);
maxLength = ((CharTypeInfo)oi.getTypeInfo()).getLength();
data = new HiveCharWritable();
}
public LazyHiveChar(LazyHiveChar copy) {
super(copy);
this.maxLength = copy.maxLength;
data = new HiveCharWritable(copy.data);
}
public void setValue(LazyHiveChar copy) {
data.set(copy.data, maxLength);
}
@Override
public void init(ByteArrayRef bytes, int start, int length) {
if (oi.isEscaped()) {
Text textData = data.getTextValue();
// This is doing a lot of copying here, this could be improved by enforcing length
// at the same time as escaping rather than as separate steps.
LazyUtils.copyAndEscapeStringDataToText(bytes.getData(), start, length,
oi.getEscapeChar(),textData);
data.set(textData.toString(), maxLength);
isNull = false;
} else {
String byteData = null;
try {
byteData = Text.decode(bytes.getData(), start, length);
data.set(byteData, maxLength);
isNull = false;
} catch (CharacterCodingException e) {
isNull = true;
LOG.debug("Data not in the HiveChar data type range so converted to null.", e);
}
}
}
}