/**
* 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.objectinspector;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hive.serde2.lazy.LazyArray;
import org.apache.hadoop.hive.serde2.objectinspector.ListObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.io.Text;
/**
* LazyListObjectInspector works on array data that is stored in LazyArray.
*
* Always use the ObjectInspectorFactory to create new ObjectInspector objects,
* instead of directly creating an instance of this class.
*/
public class LazyListObjectInspector implements ListObjectInspector {
public static final Log LOG = LogFactory.getLog(LazyListObjectInspector.class
.getName());
ObjectInspector listElementObjectInspector;
byte separator;
Text nullSequence;
boolean escaped;
byte escapeChar;
/**
* Call ObjectInspectorFactory.getLazySimpleListObjectInspector instead.
*/
protected LazyListObjectInspector(ObjectInspector listElementObjectInspector,
byte separator, Text nullSequence, boolean escaped, byte escapeChar) {
this.listElementObjectInspector = listElementObjectInspector;
this.separator = separator;
this.nullSequence = nullSequence;
this.escaped = escaped;
this.escapeChar = escapeChar;
}
@Override
public final Category getCategory() {
return Category.LIST;
}
// without data
@Override
public ObjectInspector getListElementObjectInspector() {
return listElementObjectInspector;
}
// with data
@Override
public Object getListElement(Object data, int index) {
if (data == null) {
return null;
}
LazyArray array = (LazyArray) data;
return array.getListElementObject(index);
}
@Override
public int getListLength(Object data) {
if (data == null) {
return -1;
}
LazyArray array = (LazyArray) data;
return array.getListLength();
}
@Override
public List<?> getList(Object data) {
if (data == null) {
return null;
}
LazyArray array = (LazyArray) data;
return array.getList();
}
@Override
public String getTypeName() {
return org.apache.hadoop.hive.serde.Constants.LIST_TYPE_NAME + "<"
+ listElementObjectInspector.getTypeName() + ">";
}
/**
* Returns the separator for delimiting items in this array. Called by
* LazyArray.init(...).
*/
public byte getSeparator() {
return separator;
}
/**
* Returns the NullSequence for this array. Called by LazyArray.init(...).
*/
public Text getNullSequence() {
return nullSequence;
}
public boolean isEscaped() {
return escaped;
}
public byte getEscapeChar() {
return escapeChar;
}
}