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A module that is everything required to understands Druid Segments
/*
* 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 org.apache.druid.frame.key;
import java.util.Comparator;
import java.util.List;
/**
* Comparator for {@link RowKey} instances.
*
* Delegates the comparing to a {@link ByteRowKeyComparator}.
*/
public class RowKeyComparator implements Comparator
{
private final ByteRowKeyComparator byteRowKeyComparatorDelegate;
private RowKeyComparator(final ByteRowKeyComparator byteRowKeyComparatorDelegate)
{
this.byteRowKeyComparatorDelegate = byteRowKeyComparatorDelegate;
}
public static RowKeyComparator create(final List keyColumns)
{
return new RowKeyComparator(ByteRowKeyComparator.create(keyColumns));
}
@Override
public int compare(final RowKey key1, final RowKey key2)
{
return byteRowKeyComparatorDelegate.compare(key1.array(), key2.array());
}
@Override
public boolean equals(Object o)
{
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
RowKeyComparator that = (RowKeyComparator) o;
return byteRowKeyComparatorDelegate.equals(that.byteRowKeyComparatorDelegate);
}
@Override
public int hashCode()
{
return byteRowKeyComparatorDelegate.hashCode();
}
@Override
public String toString()
{
return "RowKeyComparator{" +
"byteRowKeyComparatorDelegate=" + byteRowKeyComparatorDelegate +
'}';
}
}