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1
24 package org.riotfamily.common.io;
25
26 import java.io.File  ;
27 import java.io.IOException ;
28 import java.io.InputStream ;
29 import java.io.OutputStream ;
30 import java.io.Reader ;
31 import java.io.Writer ;
32
33 import org.apache.commons.logging.Log;
34 import org.apache.commons.logging.LogFactory;
35 import org.springframework.util.FileCopyUtils;
36
37 public class IOUtils {
38
39 public static final int BUFFER_SIZE = 4096;
40
41 private static Log log = LogFactory.getLog(IOUtils.class);
42
43 public static int copy(InputStream in, OutputStream out)
44 throws IOException {
45
46 try {
47 int byteCount = 0;
48 byte[] buffer = new byte[BUFFER_SIZE];
49 int bytesRead = -1;
50 while ((bytesRead = in.read(buffer)) != -1) {
51 out.write(buffer, 0, bytesRead);
52 byteCount += bytesRead;
53 }
54 out.flush();
55 return byteCount;
56 }
57 finally {
58 closeStream(in);
59 }
60 }
61
62 public static int copy(Reader in, Writer out)
63 throws IOException {
64
65 try {
66 int byteCount = 0;
67 char[] buffer = new char[BUFFER_SIZE];
68 int bytesRead = -1;
69 while ((bytesRead = in.read(buffer)) != -1) {
70 out.write(buffer, 0, bytesRead);
71 byteCount += bytesRead;
72 }
73 out.flush();
74 return byteCount;
75 }
76 finally {
77 closeReader(in);
78 }
79 }
80
81 public static void closeStream(InputStream in) {
82 if (in != null) {
83 try {
84 in.close();
85 }
86 catch (IOException ex) {
87 }
88 }
89 }
90
91 public static void closeStream(OutputStream out) {
92 if (out != null) {
93 try {
94 out.close();
95 }
96 catch (IOException ex) {
97 }
98 }
99 }
100
101 public static void closeReader(Reader reader) {
102 if (reader != null) {
103 try {
104 reader.close();
105 }
106 catch (IOException ex) {
107 }
108 }
109 }
110
111 public static void closeWriter(Writer writer) {
112 if (writer != null) {
113 try {
114 writer.close();
115 }
116 catch (IOException ex) {
117 }
118 }
119 }
120
121 public static void move(File source, File dest) {
122 if (!source.renameTo(dest)) {
123 try {
124 log.info("Unable to move file " + source);
125 FileCopyUtils.copy(source, dest);
126 }
127 catch (IOException e) {
128 log.warn("Copy failed.", e);
129 }
130 delete(source);
131 }
132 }
133
134 public static void delete(File file) {
135 if (file != null && file.exists()) {
136 boolean deleted = file.delete();
137 if (!deleted) {
138 file.deleteOnExit();
139 }
140 }
141 }
142 }
143 |
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