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annotate core/src/luan/modules/Utils.java @ 251:705d14f4d8ee

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start web testing git-svn-id: https://luan-java.googlecode.com/svn/trunk@252 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Sun, 19 Oct 2014 03:38:47 +0000
parents 97d175772fed
children 4dfa86dbca45
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rev   line source
167
4c0131c2b650 merge luan/lib into modules
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1 package luan.modules;
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2
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3 import java.io.Reader;
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4 import java.io.IOException;
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5 import java.io.ByteArrayOutputStream;
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6 import java.io.InputStream;
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7 import java.io.OutputStream;
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8 import java.io.File;
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9 import java.net.URL;
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10 import java.net.MalformedURLException;
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11 import luan.LuanState;
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12 import luan.LuanException;
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13 import luan.LuanTable;
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14
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15
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16 public final class Utils {
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17 private Utils() {} // never
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1ff1c32417eb more IoLib work and added init.luan
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19 static final int bufSize = 8192;
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251
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21 private static void checkNotNull(LuanState luan,Object v,String expected) throws LuanException {
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22 if( v == null )
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23 throw luan.exception("bad argument #1 ("+expected+" expected, got nil)");
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24 }
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25
251
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26 public static void checkNotNull(LuanState luan,String s) throws LuanException {
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27 checkNotNull(luan,s,"string");
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28 }
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29
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30 public static void checkNotNull(LuanState luan,LuanTable t) throws LuanException {
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31 checkNotNull(luan,t,"table");
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32 }
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33
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34 public static void checkNotNull(LuanState luan,Number n) throws LuanException {
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35 checkNotNull(luan,n,"number");
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36 }
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37
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38 public static String readAll(Reader in)
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39 throws IOException
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40 {
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41 char[] a = new char[bufSize];
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42 StringBuilder buf = new StringBuilder();
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43 int n;
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44 while( (n=in.read(a)) != -1 ) {
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45 buf.append(a,0,n);
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46 }
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47 return buf.toString();
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48 }
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49
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50 public static void copyAll(InputStream in,OutputStream out)
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51 throws IOException
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52 {
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53 byte[] a = new byte[bufSize];
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54 int n;
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55 while( (n=in.read(a)) != -1 ) {
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56 out.write(a,0,n);
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57 }
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58 }
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59
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60 public static byte[] readAll(InputStream in)
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61 throws IOException
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62 {
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63 ByteArrayOutputStream out = new ByteArrayOutputStream();
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64 copyAll(in,out);
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65 return out.toByteArray();
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66 }
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67 /*
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68 public static boolean exists(File file) {
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69 try {
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70 return file.exists() && file.getName().equals(file.getCanonicalFile().getName());
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71 } catch(IOException e) {
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72 throw new RuntimeException(e);
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73 }
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74 }
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75 */
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76 public static File toFile(String path) {
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77 if( path.contains("//") )
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78 return null;
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79 File file = new File(path);
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80 return file.exists() ? file : null;
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81 }
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82
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83 public static URL toUrl(String path) {
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84 if( path.indexOf(':') == -1 )
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85 return null;
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86 if( path.startsWith("java:") ) {
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87 path = path.substring(5);
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88 if( path.contains("//") )
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89 return null;
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90 URL url;
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91 if( !path.contains("#") ) {
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92 url = ClassLoader.getSystemResource(path);
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93 } else {
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94 String[] a = path.split("#");
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95 url = ClassLoader.getSystemResource(a[0]);
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96 if( url==null ) {
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97 for( int i=1; i<a.length; i++ ) {
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98 url = ClassLoader.getSystemResource(a[0]+"/"+a[i]);
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99 if( url != null ) {
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100 try {
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101 url = new URL(url,".");
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102 } catch(MalformedURLException e) {
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103 throw new RuntimeException(e);
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104 }
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105 break;
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106 }
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107 }
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108 }
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109 }
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110 return url==null ? null : url;
143
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111 }
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112 try {
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113 return new URL(path);
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114 } catch(MalformedURLException e) {}
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115 return null;
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116 }
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117
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118 public static boolean exists(String path) {
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119 return toFile(path)!=null || toUrl(path)!=null;
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120 }
75
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121 }