001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.collections.primitives.adapters.io;
018
019import java.io.InputStream;
020
021import org.apache.commons.collections.primitives.ByteIterator;
022
023/**
024 * Adapts an {@link ByteIterator} to the {@link InputStream} interface.
025 * 
026 * @version $Revision: 480462 $ $Date: 2006-11-29 03:15:00 -0500 (Wed, 29 Nov 2006) $
027 * @author Rodney Waldhoff
028 */
029public class ByteIteratorInputStream extends InputStream {
030
031    public ByteIteratorInputStream(ByteIterator in) {
032        this.iterator= in;
033    }
034
035    public int read() {
036        if(iterator.hasNext()) {
037            return (0xFF & iterator.next());
038        } else {
039            return -1;
040        }
041    }
042
043    public static InputStream adapt(ByteIterator in) {
044        return null == in ? null : new ByteIteratorInputStream(in);
045    }
046    
047    private ByteIterator iterator = null;
048
049}