// 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.ArrayList;
import java.util.List;
import com.facebook.hive.orc.OrcProto;
import com.facebook.hive.orc.OrcStruct;
import com.facebook.hive.orc.OrcStruct.Field;
import org.apache.hadoop.hive.serde2.objectinspector.StructField;
import org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspector;
import org.apache.hadoop.hive.serde2.typeinfo.StructTypeInfo;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
public class OrcLazyStructObjectInspector extends StructObjectInspector {
protected final List<StructField> fields;
protected OrcLazyStructObjectInspector() {
this.fields = new ArrayList<StructField>();
}
public OrcLazyStructObjectInspector(StructTypeInfo info) {
ArrayList<String> fieldNames = info.getAllStructFieldNames();
ArrayList<TypeInfo> fieldTypes = info.getAllStructFieldTypeInfos();
fields = new ArrayList<StructField>(fieldNames.size());
for(int i=0; i < fieldNames.size(); ++i) {
fields.add(new Field(fieldNames.get(i),
OrcLazyObjectInspectorUtils.createWritableObjectInspector(fieldTypes.get(i)), i));
}
}
public OrcLazyStructObjectInspector(int columnId, List<OrcProto.Type> types) {
OrcProto.Type type = types.get(columnId);
int fieldCount = type.getSubtypesCount();
fields = new ArrayList<StructField>(fieldCount);
for(int i=0; i < fieldCount; ++i) {
int fieldType = type.getSubtypes(i);
fields.add(new Field(type.getFieldNames(i),
OrcLazyObjectInspectorUtils.createWritableObjectInspector(fieldType, types), i));
}
}
@Override
public List<? extends StructField> getAllStructFieldRefs() {
return fields;
}
@Override
public Object getStructFieldData(Object data, StructField fieldRef) {
if (data == null) {
return null;
}
int offset = ((Field) fieldRef).getOffset();
OrcStruct struct;
try {
struct = (OrcStruct) ((OrcLazyStruct) data).materialize();
} catch (IOException e) {
throw new RuntimeException(e);
}
if (offset >= struct.getNumFields()) {
return null;
}
return struct.getFieldValue(offset);
}
@Override
public StructField getStructFieldRef(String fieldName) {
for(StructField field: fields) {
if (field.getFieldName().equals(fieldName)) {
return field;
}
}
return null;
}
@Override
public List<Object> getStructFieldsDataAsList(Object data) {
if (data == null) {
return null;
}
OrcStruct struct;
try {
struct = (OrcStruct) ((OrcLazyStruct) data).materialize();
} catch (IOException e) {
throw new RuntimeException(e);
}
List<Object> result = new ArrayList<Object>(struct.getNumFields());
for (int i = 0; i < struct.getNumFields(); i++) {
result.add(struct.getFieldValue(i));
}
return result;
}
@Override
public Category getCategory() {
return Category.STRUCT;
}
@Override
public String getTypeName() {
StringBuilder buffer = new StringBuilder();
buffer.append("struct<");
for(int i=0; i < fields.size(); ++i) {
StructField field = fields.get(i);
if (i != 0) {
buffer.append(",");
}
buffer.append(field.getFieldName());
buffer.append(":");
buffer.append(field.getFieldObjectInspector().getTypeName());
}
buffer.append(">");
return buffer.toString();
}
@Override
public boolean equals(Object o) {
if (o == null || o.getClass() != getClass()) {
return false;
} else if (o == this) {
return true;
} else {
List<StructField> other = ((OrcLazyStructObjectInspector) o).fields;
if (other.size() != fields.size()) {
return false;
}
for(int i = 0; i < fields.size(); ++i) {
StructField left = other.get(i);
StructField right = fields.get(i);
if (!(left.getFieldName().equals(right.getFieldName()) &&
left.getFieldObjectInspector().equals
(right.getFieldObjectInspector()))) {
return false;
}
}
return true;
}
}
}