// 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 java.util.Map;
import com.facebook.hive.orc.InStream;
import com.facebook.hive.orc.OrcProto;
import com.facebook.hive.orc.OrcStruct;
import com.facebook.hive.orc.StreamName;
import com.facebook.hive.orc.OrcProto.RowIndex;
public class OrcLazyRow extends OrcLazyStruct {
private OrcLazyObject[] fields;
private final List<String> fieldNames;
public OrcLazyRow(OrcLazyObject[] fields, List<String> fieldNames) {
super(null);
this.fields = fields;
this.fieldNames = fieldNames;
}
@Override
public void next() {
super.next();
for (OrcLazyObject field : fields) {
if (field != null) {
field.next();
}
}
}
@Override
public void startStripe(Map<StreamName, InStream> streams, List<OrcProto.ColumnEncoding> encodings,
RowIndex[] indexes, long rowBaseInStripe) throws IOException {
for (OrcLazyObject field : fields) {
if (field != null) {
field.startStripe(streams, encodings, indexes, rowBaseInStripe);
}
}
}
@Override
public Object materialize(long row, Object previous) throws IOException {
OrcStruct previousRow;
if (previous != null) {
previousRow = (OrcStruct) previous;
previousRow.setFieldNames(fieldNames);
} else {
previousRow = new OrcStruct(fieldNames);
}
for (int i = 0; i < fields.length; i++) {
previousRow.setFieldValue(i, fields[i]);
}
return previousRow;
}
@Override
public void seekToRow(long rowNumber) throws IOException {
for (OrcLazyObject field : fields) {
if (field != null) {
field.seekToRow(rowNumber);
}
}
}
public int getNumFields() {
return fields.length;
}
public OrcLazyObject getFieldValue(int index) {
if (index >= fields.length) {
return null;
}
return fields[index];
}
public void reset(OrcLazyRow other) throws IOException {
this.fields = other.getRawFields();
seekToRow(0);
}
public OrcLazyObject[] getRawFields() {
return fields;
}
@Override
public void close() throws IOException {
for (OrcLazyObject field : fields) {
if (field != null) {
field.close();
}
}
}
}