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 transient 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 return buffer.array();
051 }
052
053 @Converter
054 public static String toString(ByteBuffer buffer, Exchange exchange) throws IOException {
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 = IOHelper.buffered(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 IOHelper.close(in, "Failed to close file stream: " + file.getPath(), LOG);
079 }
080 }
081
082 @Converter
083 public static ByteBuffer toByteBuffer(String value, Exchange exchange) {
084 ByteBuffer buf = ByteBuffer.allocate(value.length());
085 byte[] bytes = null;
086 if (exchange != null) {
087 String charsetName = exchange.getProperty(Exchange.CHARSET_NAME, String.class);
088 if (charsetName != null) {
089 try {
090 bytes = value.getBytes(charsetName);
091 } catch (UnsupportedEncodingException e) {
092 LOG.warn("Cannot convert the byte to String with the charset " + charsetName, e);
093 }
094 }
095 }
096 if (bytes == null) {
097 bytes = value.getBytes();
098 }
099 buf.put(bytes);
100 return buf;
101 }
102
103 @Converter
104 public static ByteBuffer toByteBuffer(Short value) {
105 ByteBuffer buf = ByteBuffer.allocate(2);
106 buf.putShort(value);
107 return buf;
108 }
109
110 @Converter
111 public static ByteBuffer toByteBuffer(Integer value) {
112 ByteBuffer buf = ByteBuffer.allocate(4);
113 buf.putInt(value);
114 return buf;
115 }
116
117 @Converter
118 public static ByteBuffer toByteBuffer(Long value) {
119 ByteBuffer buf = ByteBuffer.allocate(8);
120 buf.putLong(value);
121 return buf;
122 }
123
124 @Converter
125 public static ByteBuffer toByteBuffer(Float value) {
126 ByteBuffer buf = ByteBuffer.allocate(4);
127 buf.putFloat(value);
128 return buf;
129 }
130
131 @Converter
132 public static ByteBuffer toByteBuffer(Double value) {
133 ByteBuffer buf = ByteBuffer.allocate(8);
134 buf.putDouble(value);
135 return buf;
136 }
137
138 @Converter
139 public static InputStream toInputStream(ByteBuffer bufferbuffer) {
140 return IOConverter.toInputStream(toByteArray(bufferbuffer));
141 }
142 }