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/*
* Copyright (2020-present) The Delta Lake Project Authors.
*
* 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 io.delta.hive;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapred.FileSplit;
/**
* A special {@link FileSplit} that holds the corresponding partition information of the file.
*
* This file is written in Java because we need to call two different constructors of
* {@link FileSplit} but Scala doesn't support it.
*/
public class DeltaInputSplit extends FileSplit {
private PartitionColumnInfo[] partitionColumns;
protected DeltaInputSplit() {
super();
partitionColumns = new PartitionColumnInfo[0];
}
public DeltaInputSplit(Path file, long start, long length, String[] hosts,
PartitionColumnInfo[] partitionColumns) {
super(file, start, length, hosts);
this.partitionColumns = partitionColumns;
}
public DeltaInputSplit(Path file, long start, long length, String[] hosts,
String[] inMemoryHosts, PartitionColumnInfo[] partitionColumns) {
super(file, start, length, hosts, inMemoryHosts);
this.partitionColumns = partitionColumns;
}
public PartitionColumnInfo[] getPartitionColumns() {
return partitionColumns;
}
public void write(DataOutput out) throws IOException {
super.write(out);
out.writeInt(partitionColumns.length);
for (PartitionColumnInfo partitionColumn : partitionColumns) {
partitionColumn.write(out);
}
}
public void readFields(DataInput in) throws IOException {
super.readFields(in);
int size = in.readInt();
partitionColumns = new PartitionColumnInfo[size];
for (int i = 0; i < size; i++) {
PartitionColumnInfo partitionColumn = new PartitionColumnInfo();
partitionColumn.readFields(in);
partitionColumns[i] = partitionColumn;
}
}
}