// Copyright (c) 2013, Facebook, Inc. All rights reserved.
/**
* 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 com.facebook.hive.orc.lazy;
import java.io.IOException;
import java.util.List;
import org.apache.hadoop.hive.serde2.objectinspector.ListObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.typeinfo.ListTypeInfo;
import com.facebook.hive.orc.OrcProto;
public class OrcLazyListObjectInspector implements ListObjectInspector {
private final ObjectInspector child;
public OrcLazyListObjectInspector(ListTypeInfo info) {
child = OrcLazyObjectInspectorUtils.createWritableObjectInspector(info.getListElementTypeInfo());
}
public OrcLazyListObjectInspector(int columnId, List<OrcProto.Type> types) {
OrcProto.Type type = types.get(columnId);
child = OrcLazyObjectInspectorUtils.createWritableObjectInspector(type.getSubtypes(0), types);
}
@Override
public List<?> getList(Object data) {
if (data == null) {
return null;
}
try {
return (List<?>) ((OrcLazyList) data).materialize();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Override
public Object getListElement(Object data, int index) {
List<?> list = getList(data);
if (list == null || index < 0 || index >= list.size()) {
return null;
}
return list.get(index);
}
@Override
public ObjectInspector getListElementObjectInspector() {
return child;
}
@Override
public int getListLength(Object data) {
if (data == null) {
return -1;
}
return getList(data).size();
}
@Override
public Category getCategory() {
return Category.LIST;
}
@Override
public String getTypeName() {
return "array<" + child.getTypeName() + ">";
}
@Override
public boolean equals(Object o) {
if (o == null || o.getClass() != getClass()) {
return false;
} else if (o == this) {
return true;
} else {
ObjectInspector other = ((OrcLazyListObjectInspector) o).child;
return other.equals(child);
}
}
}