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/*
* 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 com.facebook.presto.jdbc.internal.spi;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonCreator;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonIgnore;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonProperty;
import java.util.Objects;
/**
* A Range of values across the continuous space defined by the types of the Markers
*/
public final class Range
{
private final Marker low;
private final Marker high;
@JsonCreator
public Range(
@JsonProperty("low") Marker low,
@JsonProperty("high") Marker high)
{
Objects.requireNonNull(low, "value is null");
Objects.requireNonNull(high, "value is null");
if (!low.getType().equals(high.getType())) {
throw new IllegalArgumentException(String.format("Marker types do not match: %s vs %s", low.getType(), high.getType()));
}
if (low.isUpperUnbounded()) {
throw new IllegalArgumentException("low cannot be upper unbounded");
}
if (high.isLowerUnbounded()) {
throw new IllegalArgumentException("high cannot be lower unbounded");
}
if (low.compareTo(high) > 0) {
throw new IllegalArgumentException("low must be less than or equal to high");
}
this.low = low;
this.high = high;
}
public static Range all(Class type)
{
return new Range(Marker.lowerUnbounded(type), Marker.upperUnbounded(type));
}
public static Range greaterThan(Comparable low)
{
return new Range(Marker.above(low), Marker.upperUnbounded(low.getClass()));
}
public static Range greaterThanOrEqual(Comparable low)
{
return new Range(Marker.exactly(low), Marker.upperUnbounded(low.getClass()));
}
public static Range lessThan(Comparable high)
{
return new Range(Marker.lowerUnbounded(high.getClass()), Marker.below(high));
}
public static Range lessThanOrEqual(Comparable high)
{
return new Range(Marker.lowerUnbounded(high.getClass()), Marker.exactly(high));
}
public static Range equal(Comparable value)
{
return new Range(Marker.exactly(value), Marker.exactly(value));
}
public static Range range(Comparable low, boolean lowInclusive, Comparable high, boolean highInclusive)
{
Marker lowMarker = lowInclusive ? Marker.exactly(low) : Marker.above(low);
Marker highMarker = highInclusive ? Marker.exactly(high) : Marker.below(high);
return new Range(lowMarker, highMarker);
}
@JsonIgnore
public Class getType()
{
return low.getType();
}
@JsonProperty
public Marker getLow()
{
return low;
}
@JsonProperty
public Marker getHigh()
{
return high;
}
@JsonIgnore
public boolean isSingleValue()
{
return !low.isLowerUnbounded() &&
!high.isUpperUnbounded() &&
low.getBound() == Marker.Bound.EXACTLY &&
high.getBound() == Marker.Bound.EXACTLY &&
low.getValue().equals(high.getValue());
}
@JsonIgnore
public Comparable getSingleValue()
{
if (!isSingleValue()) {
throw new IllegalStateException("Range does not have just a single value");
}
return low.getValue();
}
@JsonIgnore
public boolean isAll()
{
return low.isLowerUnbounded() && high.isUpperUnbounded();
}
public boolean includes(Marker marker)
{
Objects.requireNonNull(marker, "marker is null");
checkTypeCompatibility(marker);
return low.compareTo(marker) <= 0 && high.compareTo(marker) >= 0;
}
public boolean contains(Range other)
{
checkTypeCompatibility(other);
return this.getLow().compareTo(other.getLow()) <= 0 &&
this.getHigh().compareTo(other.getHigh()) >= 0;
}
public Range span(Range other)
{
checkTypeCompatibility(other);
Marker lowMarker = Marker.min(low, other.getLow());
Marker highMarker = Marker.max(high, other.getHigh());
return new Range(lowMarker, highMarker);
}
public boolean overlaps(Range other)
{
checkTypeCompatibility(other);
return this.getLow().compareTo(other.getHigh()) <= 0 &&
other.getLow().compareTo(this.getHigh()) <= 0;
}
public Range intersect(Range other)
{
checkTypeCompatibility(other);
if (!this.overlaps(other)) {
throw new IllegalArgumentException("Cannot intersect non-overlapping ranges");
}
Marker lowMarker = Marker.max(low, other.getLow());
Marker highMarker = Marker.min(high, other.getHigh());
return new Range(lowMarker, highMarker);
}
private void checkTypeCompatibility(Range range)
{
if (!getType().equals(range.getType())) {
throw new IllegalArgumentException(String.format("Mismatched Range types: %s vs %s", getType(), range.getType()));
}
}
private void checkTypeCompatibility(Marker marker)
{
if (!getType().equals(marker.getType())) {
throw new IllegalArgumentException(String.format("Marker of %s does not match Range of %s", marker.getType(), getType()));
}
}
@Override
public int hashCode()
{
return Objects.hash(low, high);
}
@Override
public boolean equals(Object obj)
{
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
final Range other = (Range) obj;
return Objects.equals(this.low, other.low) &&
Objects.equals(this.high, other.high);
}
@Override
public String toString()
{
final StringBuilder sb = new StringBuilder();
if (isSingleValue()) {
sb.append('[').append(low.getValue()).append(']');
}
else {
sb.append((low.getBound() == Marker.Bound.EXACTLY) ? '[' : '(');
sb.append(low.isLowerUnbounded() ? "" : low.getValue());
sb.append(", ");
sb.append(high.isUpperUnbounded() ? "" : high.getValue());
sb.append((high.getBound() == Marker.Bound.EXACTLY) ? ']' : ')');
}
return sb.toString();
}
}
