jet.LongProgression Maven / Gradle / Ivy
/*
* Copyright 2010-2013 JetBrains s.r.o.
*
* 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 jet;
import org.jetbrains.jet.rt.annotation.AssertInvisibleInResolver;
@AssertInvisibleInResolver
public class LongProgression implements Progression {
private final long start;
private final long end;
private final long increment;
public LongProgression(long start, long end, long increment) {
if (increment == 0) {
throw new IllegalArgumentException("Increment must be non-zero: " + increment);
}
this.start = start;
this.end = end;
this.increment = increment;
}
@Override
public Long getStart() {
return start;
}
@Override
public Long getEnd() {
return end;
}
@Override
public Long getIncrement() {
return increment;
}
@Override
public LongIterator iterator() {
return new LongProgressionIterator(start, end, increment);
}
@Override
public String toString() {
if (increment > 0) {
return start + ".." + end + " step " + increment;
}
else {
return start + " downTo " + end + " step " + -increment;
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
LongProgression longs = (LongProgression) o;
if (end != longs.end) return false;
if (increment != longs.increment) return false;
if (start != longs.start) return false;
return true;
}
@Override
public int hashCode() {
int result = (int) (start ^ (start >>> 32));
result = 31 * result + (int) (end ^ (end >>> 32));
result = 31 * result + (int) (increment ^ (increment >>> 32));
return result;
}
}