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.io.UnsupportedEncodingException;
025 import java.nio.ByteBuffer;
026
027 import org.apache.camel.Converter;
028 import org.apache.camel.Exchange;
029 import org.apache.commons.logging.Log;
030 import org.apache.commons.logging.LogFactory;
031
032 /**
033 * Some core java.nio based
034 * <a href="http://camel.apache.org/type-converter.html">Type Converters</a>
035 *
036 * @version $Revision: 747062 $
037 */
038 @Converter
039 public final class NIOConverter {
040 private static final transient Log LOG = LogFactory.getLog(NIOConverter.class);
041
042 /**
043 * Utility classes should not have a public constructor.
044 */
045 private NIOConverter() {
046 }
047
048 @Converter
049 public static byte[] toByteArray(ByteBuffer buffer) {
050 return buffer.array();
051 }
052
053 @Converter
054 public static String toString(ByteBuffer buffer, Exchange exchange) {
055 return IOConverter.toString(buffer.array(), exchange);
056 }
057
058 @Converter
059 public static ByteBuffer toByteBuffer(byte[] data) {
060 return ByteBuffer.wrap(data);
061 }
062
063 @Converter
064 public static ByteBuffer toByteBuffer(File file) throws IOException {
065 InputStream in = null;
066 try {
067 byte[] buf = new byte[(int)file.length()];
068 in = new BufferedInputStream(new FileInputStream(file));
069 int sizeLeft = (int)file.length();
070 int offset = 0;
071 while (sizeLeft > 0) {
072 int readSize = in.read(buf, offset, sizeLeft);
073 sizeLeft -= readSize;
074 offset += readSize;
075 }
076 return ByteBuffer.wrap(buf);
077 } finally {
078 try {
079 if (in != null) {
080 in.close();
081 }
082 } catch (IOException e) {
083 LOG.warn("Failed to close file stream: " + file.getPath(), e);
084 }
085 }
086 }
087
088 @Converter
089 public static ByteBuffer toByteBuffer(String value, Exchange exchange) {
090 ByteBuffer buf = ByteBuffer.allocate(value.length());
091 byte[] bytes = null;
092 if (exchange != null) {
093 String charsetName = exchange.getProperty(Exchange.CHARSET_NAME, String.class);
094 if (charsetName != null) {
095 try {
096 bytes = value.getBytes(charsetName);
097 } catch (UnsupportedEncodingException e) {
098 LOG.warn("Cannot convert the byte to String with the charset " + charsetName, e);
099 }
100 }
101 }
102 if (bytes == null) {
103 bytes = value.getBytes();
104 }
105 buf.put(bytes);
106 return buf;
107 }
108 @Converter
109 public static ByteBuffer toByteBuffer(Short value) {
110 ByteBuffer buf = ByteBuffer.allocate(2);
111 buf.putShort(value);
112 return buf;
113 }
114 @Converter
115 public static ByteBuffer toByteBuffer(Integer value) {
116 ByteBuffer buf = ByteBuffer.allocate(4);
117 buf.putInt(value);
118 return buf;
119 }
120 @Converter
121 public static ByteBuffer toByteBuffer(Long value) {
122 ByteBuffer buf = ByteBuffer.allocate(8);
123 buf.putLong(value);
124 return buf;
125 }
126 @Converter
127 public static ByteBuffer toByteBuffer(Float value) {
128 ByteBuffer buf = ByteBuffer.allocate(4);
129 buf.putFloat(value);
130 return buf;
131 }
132 @Converter
133 public static ByteBuffer toByteBuffer(Double value) {
134 ByteBuffer buf = ByteBuffer.allocate(8);
135 buf.putDouble(value);
136 return buf;
137 }
138
139 @Converter
140 public static InputStream toInputStream(ByteBuffer bufferbuffer) {
141 return IOConverter.toInputStream(toByteArray(bufferbuffer));
142 }
143 }