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A lightweight alternative to Java 8 sequential Stream
/*
* Copyright 2015 Daniel Skogquist Åborg
*
* 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 org.d2ab.iterator.doubles;
import java.util.NoSuchElementException;
import java.util.function.DoublePredicate;
public class ExclusiveTerminalDoubleIterator extends UnaryDoubleIterator {
private final DoublePredicate terminal;
private double next;
private boolean hasNext;
public ExclusiveTerminalDoubleIterator(double terminal) {
this(d -> d == terminal);
}
public ExclusiveTerminalDoubleIterator(DoublePredicate terminal) {
this.terminal = terminal;
}
@Override
public double nextDouble() {
if (!hasNext())
throw new NoSuchElementException();
hasNext = false;
return next;
}
@Override
public boolean hasNext() {
if (!hasNext && iterator.hasNext()) {
next = iterator.next();
hasNext = true;
}
return hasNext && !terminal.test(next);
}
}