org.wildfly.common.iteration.LimitedCodePointIterator Maven / Gradle / Ivy
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* Copyright 2017 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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.wildfly.common.iteration;
import java.util.NoSuchElementException;
/**
*/
final class LimitedCodePointIterator extends CodePointIterator {
private final CodePointIterator iter;
private final long size;
private long offset;
LimitedCodePointIterator(final CodePointIterator iter, final long size) {
this.iter = iter;
this.size = size;
offset = 0;
}
public boolean hasNext() {
return offset < size && iter.hasNext();
}
public boolean hasPrevious() {
return offset > 0;
}
public int next() {
if (! hasNext()) {
throw new NoSuchElementException();
}
offset++;
return iter.next();
}
public int peekNext() throws NoSuchElementException {
if (! hasNext()) {
throw new NoSuchElementException();
}
return iter.peekNext();
}
public int previous() {
if (! hasPrevious()) {
throw new NoSuchElementException();
}
offset--;
return iter.previous();
}
public int peekPrevious() throws NoSuchElementException {
if (! hasPrevious()) {
throw new NoSuchElementException();
}
return iter.peekPrevious();
}
public long getIndex() {
return offset;
}
}