net.sandius.rembulan.util.ArrayByteIterator Maven / Gradle / Ivy
/*
* Copyright 2016 Miroslav Janíček
*
* 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 net.sandius.rembulan.util;
import java.util.NoSuchElementException;
import java.util.Objects;
/**
* A byte iterator over byte arrays.
*/
public class ArrayByteIterator implements ByteIterator {
private final byte[] bytes;
private int idx;
/**
* Constructs a new byte iterator of the array {@code bytes}.
*
* @param bytes the byte iterator to iterate over, must not be {@code null}
*
* @throws NullPointerException if {@code bytes} is {@code null}
*/
public ArrayByteIterator(byte[] bytes) {
this.bytes = Objects.requireNonNull(bytes);
}
@Override
public byte nextByte() {
if (idx < bytes.length) {
return bytes[idx++];
}
else {
throw new NoSuchElementException();
}
}
@Override
public boolean hasNext() {
return idx < bytes.length;
}
@Override
public Byte next() {
return Byte.valueOf(nextByte());
}
@Override
public void remove() {
throw new UnsupportedOperationException("read-only iterator");
}
}