CavalliumDBEngine/src/main/java/it/cavallium/dbengine/database/LLRange.java

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2021-01-30 00:24:55 +01:00
package it.cavallium.dbengine.database;
import java.util.Arrays;
import java.util.StringJoiner;
public class LLRange {
private static final LLRange RANGE_ALL = new LLRange(null, null);
private final byte[] min;
private final byte[] max;
private LLRange(byte[] min, byte[] max) {
this.min = min;
this.max = max;
}
public static LLRange all() {
return RANGE_ALL;
}
public static LLRange from(byte[] min) {
return new LLRange(min, null);
}
public static LLRange to(byte[] max) {
return new LLRange(null, max);
}
public static LLRange single(byte[] single) {
return new LLRange(single, single);
}
public static LLRange of(byte[] min, byte[] max) {
return new LLRange(min, max);
}
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public boolean isAll() {
return min == null && max == null;
}
public boolean isSingle() {
if (min == null || max == null) return false;
return Arrays.equals(min, max);
}
public boolean hasMin() {
return min != null;
}
public byte[] getMin() {
assert min != null;
return min;
}
public boolean hasMax() {
return max != null;
}
public byte[] getMax() {
assert max != null;
return max;
}
public byte[] getSingle() {
assert isSingle();
return min;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
LLRange llRange = (LLRange) o;
return Arrays.equals(min, llRange.min) && Arrays.equals(max, llRange.max);
}
@Override
public int hashCode() {
int result = Arrays.hashCode(min);
result = 31 * result + Arrays.hashCode(max);
return result;
}
@Override
public String toString() {
return new StringJoiner(", ", LLRange.class.getSimpleName() + "[", "]")
.add("min=" + Arrays.toString(min))
.add("max=" + Arrays.toString(max))
.toString();
}
}