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.camel.converter;
018    
019    import java.io.BufferedInputStream;
020    import java.io.File;
021    import java.io.FileInputStream;
022    import java.io.IOException;
023    import java.io.InputStream;
024    import java.nio.ByteBuffer;
025    
026    import org.apache.camel.Converter;
027    
028    /**
029     * Some core java.nio based
030     * <a href="http://activemq.apache.org/camel/type-converter.html">Type Converters</a>
031     *
032     * @version $Revision: 36321 $
033     */
034    @Converter
035    public final class NIOConverter {
036    
037        /**
038         * Utility classes should not have a public constructor.
039         */
040        private NIOConverter() {
041        }
042    
043        @Converter
044        public static byte[] toByteArray(ByteBuffer buffer) {
045            return buffer.array();
046        }
047    
048        @Converter
049        public static String toString(ByteBuffer buffer) {
050            return IOConverter.toString(buffer.array());
051        }
052    
053        @Converter
054        public static ByteBuffer toByteBuffer(byte[] data) {
055            return ByteBuffer.wrap(data);
056        }
057    
058        @Converter
059        public static ByteBuffer toByteBuffer(File file) throws IOException {
060            byte[] buf = new byte[(int)file.length()];
061            InputStream in = new BufferedInputStream(new FileInputStream(file));
062            in.read(buf);
063            return ByteBuffer.wrap(buf);
064        }
065    
066        @Converter
067        public static ByteBuffer toByteBuffer(String value) {
068            ByteBuffer buf = ByteBuffer.allocate(value.length());
069            byte[] bytes = value.getBytes();
070            buf.put(bytes);
071            return buf;
072        }
073        @Converter
074        public static ByteBuffer toByteBuffer(Short value) {
075            ByteBuffer buf = ByteBuffer.allocate(2);
076            buf.putShort(value);
077            return buf;
078        }
079        @Converter
080        public static ByteBuffer toByteBuffer(Integer value) {
081            ByteBuffer buf = ByteBuffer.allocate(4);
082            buf.putInt(value);
083            return buf;
084        }
085        @Converter
086        public static ByteBuffer toByteBuffer(Long value) {
087            ByteBuffer buf = ByteBuffer.allocate(8);
088            buf.putLong(value);
089            return buf;
090        }
091        @Converter
092        public static ByteBuffer toByteBuffer(Float value) {
093            ByteBuffer buf = ByteBuffer.allocate(4);
094            buf.putFloat(value);
095            return buf;
096        }
097        @Converter
098        public static ByteBuffer toByteBuffer(Double value) {
099            ByteBuffer buf = ByteBuffer.allocate(8);
100            buf.putDouble(value);
101            return buf;
102        }
103    
104        @Converter
105        public static InputStream toInputStream(ByteBuffer bufferbuffer) {
106            return IOConverter.toInputStream(toByteArray(bufferbuffer));
107        }
108    }