parquet.example.data.GroupWriter Maven / Gradle / Ivy
/**
* Copyright 2012 Twitter, Inc.
*
* Licensed 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 parquet.example.data;
import parquet.io.api.RecordConsumer;
import parquet.schema.GroupType;
import parquet.schema.Type;
public class GroupWriter {
private final RecordConsumer recordConsumer;
private final GroupType schema;
public GroupWriter(RecordConsumer recordConsumer, GroupType schema) {
this.recordConsumer = recordConsumer;
this.schema = schema;
}
public void write(Group group) {
recordConsumer.startMessage();
writeGroup(group, schema);
recordConsumer.endMessage();
}
private void writeGroup(Group group, GroupType type) {
int fieldCount = type.getFieldCount();
for (int field = 0; field < fieldCount; ++field) {
int valueCount = group.getFieldRepetitionCount(field);
if (valueCount > 0) {
Type fieldType = type.getType(field);
String fieldName = fieldType.getName();
recordConsumer.startField(fieldName, field);
for (int index = 0; index < valueCount; ++index) {
if (fieldType.isPrimitive()) {
group.writeValue(field, index, recordConsumer);
} else {
recordConsumer.startGroup();
writeGroup(group.getGroup(field, index), fieldType.asGroupType());
recordConsumer.endGroup();
}
}
recordConsumer.endField(fieldName, field);
}
}
}
}