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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.predicate.index;
import java.util.stream.Stream;
/**
* Represents a collapsed leaf node in the fixed tree range representation.
*
* @author Magnar Nedland
* @author bjorncs
*/
public class IntervalWithBounds {
private int[] intervalBoundsArray;
private int arrayIndex;
public IntervalWithBounds() {
setIntervalArray(null, 0);
}
public IntervalWithBounds(int interval, int bounds) {
setIntervalArray(new int[] {interval, bounds}, 0);
}
public void setIntervalArray(int[] intervalBoundsArray, int arrayIndex) {
this.intervalBoundsArray = intervalBoundsArray;
this.arrayIndex = arrayIndex;
}
public boolean hasValue() { return arrayIndex < intervalBoundsArray.length - 1; }
public void nextValue() { arrayIndex += 2; }
public Stream<Integer> stream() { return Stream.of(getInterval(), getBounds()); }
/**
* 16 MSB represents interval begin, 16 LSB represents interval end.
*/
public int getInterval() {
return intervalBoundsArray[arrayIndex];
}
/*
* 2 MSB determines mode for remaining 30 bits.
* 10 => Greater or equal
* 01 => Less than
* 00 => 16 LSB > X >= 16 MSB
*/
public int getBounds() {
return intervalBoundsArray[arrayIndex + 1];
}
/**
* Checks if a value is contained within the specified bounds.
* @param value Value to check against
* @return true if value is contained within the specified bounds
*/
public boolean contains(int value) {
int bounds = getBounds();
if ((bounds & 0x80000000) != 0) {
return value >= (bounds & 0x3fffffff);
} else if ((bounds & 0x40000000) != 0) {
return value < (bounds & 0x3fffffff);
} else {
return (value >= (bounds >> 16)) && (value < (bounds & 0xffff));
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
IntervalWithBounds that = (IntervalWithBounds) o;
return getInterval() == that.getInterval() && getBounds() == that.getBounds();
}
@Override
public int hashCode() {
return 31 * getInterval() + getBounds();
}
@Override
public String toString() {
return "IntervalWithBounds{" +
"interval=" + getInterval() +
", bounds=" + getBounds() +
'}';
}
}
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