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 org.apache.camel.Converter; 020 import org.apache.commons.logging.Log; 021 import org.apache.commons.logging.LogFactory; 022 023 import java.io.*; 024 import java.net.URL; 025 026 /** 027 * Some core java.io based <a 028 * href="http://activemq.apache.org/camel/type-converter.html">Type Converters</a> 029 * 030 * @version $Revision: 564167 $ 031 */ 032 @Converter 033 public class IOConverter { 034 private static final transient Log LOG = LogFactory.getLog(IOConverter.class); 035 036 /** 037 * Utility classes should not have a public constructor. 038 */ 039 private IOConverter() { 040 } 041 042 @Converter 043 public static InputStream toInputStream(URL url) throws IOException { 044 return url.openStream(); 045 } 046 047 @Converter 048 public static InputStream toInputStream(File file) throws FileNotFoundException { 049 return new BufferedInputStream(new FileInputStream(file)); 050 } 051 052 @Converter 053 public static BufferedReader toReader(File file) throws FileNotFoundException { 054 return new BufferedReader(new FileReader(file)); 055 } 056 057 @Converter 058 public static File toFile(String name) throws FileNotFoundException { 059 return new File(name); 060 } 061 062 @Converter 063 public static OutputStream toOutputStream(File file) throws FileNotFoundException { 064 return new BufferedOutputStream(new FileOutputStream(file)); 065 } 066 067 @Converter 068 public static BufferedWriter toWriter(File file) throws IOException { 069 return new BufferedWriter(new FileWriter(file)); 070 } 071 072 @Converter 073 public static Reader toReader(InputStream in) throws FileNotFoundException { 074 return new InputStreamReader(in); 075 } 076 077 @Converter 078 public static Writer toWriter(OutputStream out) throws FileNotFoundException { 079 return new OutputStreamWriter(out); 080 } 081 082 @Converter 083 public static StringReader toReader(String text) { 084 // TODO could we automatically find this? 085 return new StringReader(text); 086 } 087 088 @Converter 089 public static InputStream toInputStream(String text) { 090 return toInputStream(text.getBytes()); 091 } 092 093 @Converter 094 public static byte[] toByteArray(String text) { 095 // TODO could we automatically find this? 096 return text.getBytes(); 097 } 098 099 @Converter 100 public static String toString(byte[] data) { 101 return new String(data); 102 } 103 104 @Converter 105 public static String toString(File file) throws IOException { 106 return toString(toReader(file)); 107 } 108 109 @Converter 110 public static String toString(URL url) throws IOException { 111 return toString(toInputStream(url)); 112 } 113 114 @Converter 115 public static String toString(Reader reader) throws IOException { 116 if (reader instanceof BufferedReader) { 117 return toString((BufferedReader)reader); 118 } else { 119 return toString(new BufferedReader(reader)); 120 } 121 } 122 123 @Converter 124 public static String toString(BufferedReader reader) throws IOException { 125 if (reader == null) { 126 return null; 127 } 128 try { 129 StringBuilder builder = new StringBuilder(); 130 boolean first = true; 131 while (true) { 132 String line = reader.readLine(); 133 if (line == null) { 134 return builder.toString(); 135 } 136 if (first) { 137 first = false; 138 } else { 139 builder.append("\n"); 140 } 141 builder.append(line); 142 } 143 } finally { 144 try { 145 reader.close(); 146 } catch (IOException e) { 147 LOG.warn("Failed to close stream: " + e, e); 148 } 149 } 150 } 151 152 @Converter 153 public static String toString(InputStream in) throws IOException { 154 return toString(toReader(in)); 155 } 156 157 @Converter 158 public static InputStream toInputStream(byte[] data) { 159 return new ByteArrayInputStream(data); 160 } 161 162 }