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.File;
020 import java.io.FileInputStream;
021 import java.io.IOException;
022 import java.io.InputStream;
023 import java.io.UnsupportedEncodingException;
024 import java.nio.ByteBuffer;
025
026 import org.apache.camel.Converter;
027 import org.apache.camel.Exchange;
028 import org.apache.camel.util.IOHelper;
029 import org.slf4j.Logger;
030 import org.slf4j.LoggerFactory;
031
032 /**
033 * Some core java.nio based
034 * <a href="http://camel.apache.org/type-converter.html">Type Converters</a>
035 *
036 * @version
037 */
038 @Converter
039 public final class NIOConverter {
040 private static final Logger LOG = LoggerFactory.getLogger(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 byte[] bArray = new byte[buffer.limit()];
051 buffer.get(bArray);
052 return bArray;
053 }
054
055 @Converter
056 public static String toString(ByteBuffer buffer, Exchange exchange) throws IOException {
057 return IOConverter.toString(toByteArray(buffer), exchange);
058 }
059
060 @Converter
061 public static ByteBuffer toByteBuffer(byte[] data) {
062 return ByteBuffer.wrap(data);
063 }
064
065 @Converter
066 public static ByteBuffer toByteBuffer(File file) throws IOException {
067 InputStream in = null;
068 try {
069 byte[] buf = new byte[(int)file.length()];
070 in = IOHelper.buffered(new FileInputStream(file));
071 int sizeLeft = (int)file.length();
072 int offset = 0;
073 while (sizeLeft > 0) {
074 int readSize = in.read(buf, offset, sizeLeft);
075 sizeLeft -= readSize;
076 offset += readSize;
077 }
078 return ByteBuffer.wrap(buf);
079 } finally {
080 IOHelper.close(in, "Failed to close file stream: " + file.getPath(), LOG);
081 }
082 }
083
084 @Converter
085 public static ByteBuffer toByteBuffer(String value, Exchange exchange) {
086 ByteBuffer buf = ByteBuffer.allocate(value.length());
087 byte[] bytes = null;
088 if (exchange != null) {
089 String charsetName = exchange.getProperty(Exchange.CHARSET_NAME, String.class);
090 if (charsetName != null) {
091 try {
092 bytes = value.getBytes(charsetName);
093 } catch (UnsupportedEncodingException e) {
094 LOG.warn("Cannot convert the byte to String with the charset " + charsetName, e);
095 }
096 }
097 }
098 if (bytes == null) {
099 bytes = value.getBytes();
100 }
101 buf.put(bytes);
102 buf.flip();
103 return buf;
104 }
105
106 @Converter
107 public static ByteBuffer toByteBuffer(Short value) {
108 ByteBuffer buf = ByteBuffer.allocate(2);
109 buf.putShort(value);
110 buf.flip();
111 return buf;
112 }
113
114 @Converter
115 public static ByteBuffer toByteBuffer(Integer value) {
116 ByteBuffer buf = ByteBuffer.allocate(4);
117 buf.putInt(value);
118 buf.flip();
119 return buf;
120 }
121
122 @Converter
123 public static ByteBuffer toByteBuffer(Long value) {
124 ByteBuffer buf = ByteBuffer.allocate(8);
125 buf.putLong(value);
126 buf.flip();
127 return buf;
128 }
129
130 @Converter
131 public static ByteBuffer toByteBuffer(Float value) {
132 ByteBuffer buf = ByteBuffer.allocate(4);
133 buf.putFloat(value);
134 buf.flip();
135 return buf;
136 }
137
138 @Converter
139 public static ByteBuffer toByteBuffer(Double value) {
140 ByteBuffer buf = ByteBuffer.allocate(8);
141 buf.putDouble(value);
142 buf.flip();
143 return buf;
144 }
145
146 @Converter
147 public static InputStream toInputStream(ByteBuffer bufferbuffer) {
148 return IOConverter.toInputStream(toByteArray(bufferbuffer));
149 }
150 }