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Copy pathIxRepeatPredicate.java
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67 lines (52 loc) · 1.79 KB
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/*
* Copyright 2011-2016 David Karnok
*
* 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 ix;
import java.util.Iterator;
final class IxRepeatPredicate<T> extends Ix<T> {
final T value;
final long count;
final IxBooleanSupplier stopPredicate;
IxRepeatPredicate(T value, long count, IxBooleanSupplier stopPredicate) {
this.value = value;
this.stopPredicate = stopPredicate;
this.count = count;
}
@Override
public Iterator<T> iterator() {
return new RepeatPredicateIterator<T>(value, count, stopPredicate);
}
static final class RepeatPredicateIterator<T> extends IxBaseIterator<T> {
final T valueToRepeat;
long count;
final IxBooleanSupplier stopPredicate;
RepeatPredicateIterator(T value, long count, IxBooleanSupplier stopPredicate) {
this.valueToRepeat = value;
this.stopPredicate = stopPredicate;
this.count = count;
}
@Override
protected boolean moveNext() {
long c = count--;
if (c != 0L && !stopPredicate.getAsBoolean()) {
value = valueToRepeat;
hasValue = true;
return true;
}
done = true;
return false;
}
}
}