Mercurial Hosting > luan
annotate src/goodjava/io/IoUtils.java @ 1625:57c8baadb357
handle UnsupportedClassVersionError
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Sun, 05 Sep 2021 12:32:27 -0600 |
| parents | 736ec76bbf42 |
| children | 08177ced7fa0 |
| rev | line source |
|---|---|
| 1473 | 1 package goodjava.io; |
| 2 | |
| 3 import java.io.File; | |
| 1493 | 4 import java.io.InputStream; |
| 5 import java.io.OutputStream; | |
| 1509 | 6 import java.io.Reader; |
| 7 import java.io.InputStreamReader; | |
| 8 import java.io.Writer; | |
| 9 import java.io.StringWriter; | |
| 1473 | 10 import java.io.IOException; |
| 11 import java.nio.file.Files; | |
| 1548 | 12 import java.nio.file.attribute.FileTime; |
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13 import java.security.Security; |
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14 import javax.net.ssl.SSLSocketFactory; |
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15 import javax.net.ssl.SSLServerSocketFactory; |
| 1509 | 16 import goodjava.logging.Logger; |
| 17 import goodjava.logging.LoggerFactory; | |
| 1473 | 18 |
| 19 | |
| 20 public final class IoUtils { | |
| 1509 | 21 private static final Logger logger = LoggerFactory.getLogger(IoUtils.class); |
| 22 | |
| 1473 | 23 private IoUtils() {} // never |
| 24 | |
| 25 public static void move( File from, File to ) throws IOException { | |
| 26 Files.move( from.toPath(), to.toPath() ); | |
| 27 } | |
| 28 | |
| 29 public static void delete(File file) throws IOException { | |
| 30 Files.deleteIfExists( file.toPath() ); | |
| 31 } | |
| 1475 | 32 |
| 1501 | 33 public static void mkdirs(File file) throws IOException { |
| 34 Files.createDirectories( file.toPath() ); | |
| 35 } | |
| 36 | |
| 1475 | 37 public static boolean isSymbolicLink(File file) { |
| 38 return Files.isSymbolicLink(file.toPath()); | |
| 39 } | |
| 40 | |
| 41 public static void deleteRecursively(File file) throws IOException { | |
| 42 if( file.isDirectory() && !isSymbolicLink(file) ) { | |
| 43 for( File f : file.listFiles() ) { | |
| 44 deleteRecursively(f); | |
| 45 } | |
| 46 } | |
| 47 delete(file); | |
| 48 } | |
| 49 | |
| 1497 | 50 public static void link(File existing,File link) throws IOException { |
| 51 Files.createLink( link.toPath(), existing.toPath() ); | |
| 52 } | |
| 53 | |
| 54 public static void symlink(File existing,File link) throws IOException { | |
| 55 Files.createSymbolicLink( link.toPath(), existing.toPath() ); | |
| 1488 | 56 } |
| 57 | |
| 1548 | 58 public static long getCreationTime(File f) throws IOException { |
| 59 return ((FileTime)Files.getAttribute(f.toPath(),"creationTime")).toMillis(); | |
| 60 } | |
| 61 | |
| 1494 | 62 public static void copyAll(InputStream in,OutputStream out) |
| 1493 | 63 throws IOException |
| 64 { | |
| 65 byte[] a = new byte[8192]; | |
| 66 int n; | |
| 67 while( (n=in.read(a)) != -1 ) { | |
| 68 out.write(a,0,n); | |
| 69 } | |
| 1499 | 70 in.close(); |
| 1493 | 71 } |
| 72 | |
| 1509 | 73 public static void copyAll(Reader in,Writer out) |
| 74 throws IOException | |
| 75 { | |
| 76 char[] a = new char[8192]; | |
| 77 int n; | |
| 78 while( (n=in.read(a)) != -1 ) { | |
| 79 out.write(a,0,n); | |
| 80 } | |
| 81 in.close(); | |
| 82 } | |
| 83 | |
| 84 public static String readAll(Reader in) | |
| 85 throws IOException | |
| 86 { | |
| 87 StringWriter sw = new StringWriter(); | |
| 88 copyAll(in,sw); | |
| 89 return sw.toString(); | |
| 90 } | |
| 91 | |
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92 public static long checksum(InputStream in) throws IOException { |
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93 long cs = 0; |
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94 int c; |
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95 while( (c=in.read()) != -1 ) { |
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96 cs = 31 * cs + c; |
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97 } |
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98 in.close(); |
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99 return cs; |
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100 } |
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101 |
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102 |
| 1509 | 103 |
| 104 public static class ProcException extends IOException { | |
| 105 private ProcException(String msg) { | |
| 106 super(msg); | |
| 107 } | |
| 108 } | |
| 109 | |
| 110 public static void waitFor(Process proc) | |
| 111 throws IOException, ProcException | |
| 112 { | |
| 113 try { | |
| 114 proc.waitFor(); | |
| 115 } catch(InterruptedException e) { | |
| 116 throw new RuntimeException(e); | |
| 117 } | |
| 118 int exitVal = proc.exitValue(); | |
| 119 if( exitVal != 0 ) { | |
| 120 StringWriter sw = new StringWriter(); | |
| 1547 | 121 try { |
| 122 copyAll( new InputStreamReader(proc.getInputStream()), sw ); | |
| 123 } catch(IOException e) {} | |
| 1509 | 124 copyAll( new InputStreamReader(proc.getErrorStream()), sw ); |
| 125 String error = sw.toString(); | |
| 126 throw new ProcException(error); | |
| 127 } | |
| 128 } | |
| 129 | |
| 130 | |
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131 static { |
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132 // undo restrictions of modern scum |
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133 Security.setProperty("jdk.tls.disabledAlgorithms","SSLv3, RC4, DES, MD5withRSA, DH keySize < 1024, EC keySize < 224, 3DES_EDE_CBC"); |
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134 } |
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135 |
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136 public static SSLSocketFactory getSSLSocketFactory() { |
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137 return (SSLSocketFactory)SSLSocketFactory.getDefault(); |
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138 } |
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139 |
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d80395468b4e
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parents:
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140 public static SSLServerSocketFactory getSSLServerSocketFactory() { |
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d80395468b4e
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parents:
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141 return (SSLServerSocketFactory)SSLServerSocketFactory.getDefault(); |
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d80395468b4e
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parents:
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142 } |
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143 |
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144 } |