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     */
017    package org.apache.commons.collections.primitives.adapters.io;
018    
019    import java.io.InputStream;
020    
021    import 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 09:15:00 +0100 (Wed, 29 Nov 2006) $
027     * @author Rodney Waldhoff
028     */
029    public 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    }