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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.grouping.request;
/**
* This class represents a bucket in a {@link PredefinedFunction}. The generic T is the data type of the range values
* 'from' and 'to'. The range is inclusive-from and exclusive-to. All supported data types are represented as subclasses
* of this.
*
* @author Simon Thoresen Hult
*/
public class BucketValue extends GroupingExpression implements Comparable<BucketValue> {
private final ConstantValue<?> from;
private final ConstantValue<?> to;
private final ConstantValueComparator comparator = new ConstantValueComparator();
protected BucketValue(ConstantValue<?> inclusiveFrom, ConstantValue<?> exclusiveTo) {
super("bucket[" + asImage(inclusiveFrom) + ", " + asImage(exclusiveTo) + ">");
if (comparator.compare(exclusiveTo, inclusiveFrom) < 0) {
throw new IllegalArgumentException("Bucket to-value can not be less than from-value.");
}
from = inclusiveFrom;
to = exclusiveTo;
}
/**
* Returns the inclusive-from value of this bucket.
*
* @return The from-value.
*/
public ConstantValue<?> getFrom() {
return from;
}
/**
* Returns the exclusive-to value of this bucket.
*
* @return The to-value.
*/
public ConstantValue<?> getTo() {
return to;
}
@Override
public int compareTo(BucketValue rhs) {
if (comparator.compare(to, rhs.from) <= 0) {
return -1;
}
if (comparator.compare(from, rhs.to) >= 0) {
return 1;
}
return 0;
}
}
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