org.wildfly.common.iteration.ByteIteratorInputStream Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* 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.io.IOException;
import java.io.InputStream;
/**
*/
final class ByteIteratorInputStream extends InputStream {
private final ByteIterator iter;
ByteIteratorInputStream(final ByteIterator iter) {
this.iter = iter;
}
public int read() throws IOException {
return iter.hasNext() ? iter.next() : - 1;
}
public int read(final byte[] b, final int off, final int len) throws IOException {
if (len == 0) return 0;
if (! iter.hasNext()) return - 1;
return iter.drain(b, off, len);
}
}