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 import org.apache.commons.logging.Log;
028 import org.apache.commons.logging.LogFactory;
029
030 /**
031 * Some core java.nio based
032 * <a href="http://activemq.apache.org/camel/type-converter.html">Type Converters</a>
033 *
034 * @version $Revision: 668062 $
035 */
036 @Converter
037 public final class NIOConverter {
038 private static final transient Log LOG = LogFactory.getLog(NIOConverter.class);
039
040 /**
041 * Utility classes should not have a public constructor.
042 */
043 private NIOConverter() {
044 }
045
046 @Converter
047 public static byte[] toByteArray(ByteBuffer buffer) {
048 return buffer.array();
049 }
050
051 @Converter
052 public static String toString(ByteBuffer buffer) {
053 return IOConverter.toString(buffer.array());
054 }
055
056 @Converter
057 public static ByteBuffer toByteBuffer(byte[] data) {
058 return ByteBuffer.wrap(data);
059 }
060
061 @Converter
062 public static ByteBuffer toByteBuffer(File file) throws IOException {
063 InputStream in = null;
064 try {
065 byte[] buf = new byte[(int)file.length()];
066 in = new BufferedInputStream(new FileInputStream(file));
067 int sizeLeft = (int)file.length();
068 int offset = 0;
069 while (sizeLeft > 0) {
070 int readSize = in.read(buf, offset, sizeLeft);
071 sizeLeft -= readSize;
072 offset += readSize;
073 }
074 return ByteBuffer.wrap(buf);
075 } finally {
076 try {
077 if (in != null) {
078 in.close();
079 }
080 } catch (IOException e) {
081 LOG.warn("Failed to close file stream: " + file.getPath(), e);
082 }
083 }
084 }
085
086 @Converter
087 public static ByteBuffer toByteBuffer(String value) {
088 ByteBuffer buf = ByteBuffer.allocate(value.length());
089 byte[] bytes = value.getBytes();
090 buf.put(bytes);
091 return buf;
092 }
093 @Converter
094 public static ByteBuffer toByteBuffer(Short value) {
095 ByteBuffer buf = ByteBuffer.allocate(2);
096 buf.putShort(value);
097 return buf;
098 }
099 @Converter
100 public static ByteBuffer toByteBuffer(Integer value) {
101 ByteBuffer buf = ByteBuffer.allocate(4);
102 buf.putInt(value);
103 return buf;
104 }
105 @Converter
106 public static ByteBuffer toByteBuffer(Long value) {
107 ByteBuffer buf = ByteBuffer.allocate(8);
108 buf.putLong(value);
109 return buf;
110 }
111 @Converter
112 public static ByteBuffer toByteBuffer(Float value) {
113 ByteBuffer buf = ByteBuffer.allocate(4);
114 buf.putFloat(value);
115 return buf;
116 }
117 @Converter
118 public static ByteBuffer toByteBuffer(Double value) {
119 ByteBuffer buf = ByteBuffer.allocate(8);
120 buf.putDouble(value);
121 return buf;
122 }
123
124 @Converter
125 public static InputStream toInputStream(ByteBuffer bufferbuffer) {
126 return IOConverter.toInputStream(toByteArray(bufferbuffer));
127 }
128 }