annotate src/goodjava/io/IoUtils.java @ 1821:d28f5ed56454

fix stringify empty list
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 09 Jul 2024 07:17:41 -0600
parents 745f756e719b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 package goodjava.io;
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2
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3 import java.io.File;
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4 import java.io.InputStream;
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5 import java.io.OutputStream;
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6 import java.io.Reader;
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7 import java.io.InputStreamReader;
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8 import java.io.Writer;
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9 import java.io.StringWriter;
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10 import java.io.IOException;
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11 import java.net.InetAddress;
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12 import java.net.Inet4Address;
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13 import java.net.NetworkInterface;
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14 import java.nio.file.Files;
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15 import java.nio.file.attribute.FileTime;
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16 import java.security.Security;
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17 import java.util.Set;
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18 import java.util.HashSet;
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19 import java.util.Enumeration;
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20 import javax.net.ssl.SSLSocketFactory;
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21 import javax.net.ssl.SSLServerSocketFactory;
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22 import goodjava.logging.Logger;
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23 import goodjava.logging.LoggerFactory;
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24
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25
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26 public final class IoUtils {
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27 private static final Logger logger = LoggerFactory.getLogger(IoUtils.class);
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28
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29 private IoUtils() {} // never
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30
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31 public static void move( File from, File to ) throws IOException {
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32 Files.move( from.toPath(), to.toPath() );
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33 }
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34
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35 public static void copy( File from, File to ) throws IOException {
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36 Files.copy( from.toPath(), to.toPath() );
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37 }
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38
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39 public static void delete(File file) throws IOException {
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40 Files.deleteIfExists( file.toPath() );
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41 }
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42
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43 public static void mkdirs(File file) throws IOException {
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44 Files.createDirectories( file.toPath() );
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45 }
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46
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47 public static boolean isSymbolicLink(File file) {
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48 return Files.isSymbolicLink(file.toPath());
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49 }
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50
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51 public static void copyRecursively( File from, File to ) throws IOException {
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52 copy(from,to);
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53 if( from.isDirectory() && !isSymbolicLink(from) ) {
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54 for( File f : from.listFiles() ) {
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55 copyRecursively( f, new File(to,f.getName()) );
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56 }
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57 }
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58 }
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59
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60 public static void deleteRecursively(File file) throws IOException {
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61 if( file.isDirectory() && !isSymbolicLink(file) ) {
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62 for( File f : file.listFiles() ) {
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63 deleteRecursively(f);
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64 }
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65 }
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66 delete(file);
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67 }
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68
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69 public static void link(File existing,File link) throws IOException {
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70 Files.createLink( link.toPath(), existing.toPath() );
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71 }
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72
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73 public static void symlink(File existing,File link) throws IOException {
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74 Files.createSymbolicLink( link.toPath(), existing.toPath() );
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75 }
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76
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77 public static long getCreationTime(File f) throws IOException {
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78 return ((FileTime)Files.getAttribute(f.toPath(),"creationTime")).toMillis();
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79 }
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80
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81 public static void copyAll(InputStream in,OutputStream out)
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82 throws IOException
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83 {
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84 byte[] a = new byte[8192];
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85 int n;
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86 while( (n=in.read(a)) != -1 ) {
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87 out.write(a,0,n);
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88 }
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89 in.close();
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90 }
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91
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92 public static void copyAll(Reader in,Writer out)
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93 throws IOException
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94 {
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95 char[] a = new char[8192];
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96 int n;
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97 while( (n=in.read(a)) != -1 ) {
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98 out.write(a,0,n);
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99 }
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100 in.close();
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101 }
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102
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103 public static String readAll(Reader in)
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104 throws IOException
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105 {
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106 StringWriter sw = new StringWriter();
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107 copyAll(in,sw);
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108 return sw.toString();
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109 }
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110
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111 public static long checksum(InputStream in) throws IOException {
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112 long cs = 0;
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113 int c;
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114 while( (c=in.read()) != -1 ) {
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115 cs = 31 * cs + c;
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116 }
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117 in.close();
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118 return cs;
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119 }
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120
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121 public static Set<InetAddress> getInetAddresses() throws IOException {
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122 Set<InetAddress> set = new HashSet<InetAddress>();
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123 for( Enumeration<NetworkInterface> e1 = NetworkInterface.getNetworkInterfaces(); e1.hasMoreElements(); ) {
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124 NetworkInterface ni = e1.nextElement();
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125 for( Enumeration<InetAddress> e2 = ni.getInetAddresses(); e2.hasMoreElements(); ) {
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126 InetAddress ia = e2.nextElement();
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127 set.add(ia);
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128 }
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129 }
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130 return set;
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131 }
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132
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133
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134 public static class ProcException extends IOException {
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135 private ProcException(String msg) {
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136 super(msg);
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137 }
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138 }
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139
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140 public static void waitFor(Process proc)
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141 throws IOException, ProcException
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142 {
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143 try {
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144 proc.waitFor();
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145 } catch(InterruptedException e) {
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146 throw new RuntimeException(e);
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147 }
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148 int exitVal = proc.exitValue();
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149 if( exitVal != 0 ) {
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150 StringWriter sw = new StringWriter();
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151 try {
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152 copyAll( new InputStreamReader(proc.getInputStream()), sw );
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153 } catch(IOException e) {}
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154 copyAll( new InputStreamReader(proc.getErrorStream()), sw );
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155 String error = sw.toString();
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156 throw new ProcException(error);
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157 }
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158 }
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159
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160
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161 static {
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162 // undo restrictions of modern scum
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163 Security.setProperty("jdk.tls.disabledAlgorithms","SSLv3, RC4, DES, MD5withRSA, DH keySize < 1024, EC keySize < 224, 3DES_EDE_CBC");
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164 }
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165
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166 public static SSLSocketFactory getSSLSocketFactory() {
d80395468b4e ssl security in code
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167 return (SSLSocketFactory)SSLSocketFactory.getDefault();
d80395468b4e ssl security in code
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168 }
d80395468b4e ssl security in code
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169
d80395468b4e ssl security in code
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170 public static SSLServerSocketFactory getSSLServerSocketFactory() {
d80395468b4e ssl security in code
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171 return (SSLServerSocketFactory)SSLServerSocketFactory.getDefault();
d80395468b4e ssl security in code
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172 }
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173
1508
86c5e7000ecf lucene.backup checksum
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174 }