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annotate core/src/luan/modules/Utils.java @ 582:31926755689e

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add Thread.synchronized
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 31 Jul 2015 06:20:17 -0600
parents 60c549d43988
children 6ea90dc10375
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rev   line source
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1 package luan.modules;
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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 import luan.LuanFunction;
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17 public final class Utils {
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18 private Utils() {} // never
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20 static final int bufSize = 8192;
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22 private static void checkNotNull(LuanState luan,Object v,String expected) throws LuanException {
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23 if( v == null )
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24 throw new LuanException(luan,"bad argument #1 ("+expected+" expected, got nil)");
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25 }
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27 public static void checkNotNull(LuanState luan,String s) throws LuanException {
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28 checkNotNull(luan,s,"string");
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29 }
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31 public static void checkNotNull(LuanState luan,byte[] b) throws LuanException {
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32 checkNotNull(luan,b,"binary");
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33 }
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35 public static void checkNotNull(LuanState luan,LuanTable t) throws LuanException {
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36 checkNotNull(luan,t,"table");
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37 }
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39 public static void checkNotNull(LuanState luan,Number n) throws LuanException {
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40 checkNotNull(luan,n,"number");
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41 }
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42
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43 public static void checkNotNull(LuanState luan,LuanFunction fn) throws LuanException {
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44 checkNotNull(luan,fn,"function");
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45 }
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46
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47 public static String readAll(Reader in)
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48 throws IOException
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49 {
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50 char[] a = new char[bufSize];
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51 StringBuilder buf = new StringBuilder();
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52 int n;
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53 while( (n=in.read(a)) != -1 ) {
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54 buf.append(a,0,n);
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55 }
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56 return buf.toString();
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57 }
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59 public static void copyAll(InputStream in,OutputStream out)
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60 throws IOException
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61 {
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62 byte[] a = new byte[bufSize];
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63 int n;
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64 while( (n=in.read(a)) != -1 ) {
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65 out.write(a,0,n);
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66 }
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67 }
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69 public static byte[] readAll(InputStream in)
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70 throws IOException
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71 {
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72 ByteArrayOutputStream out = new ByteArrayOutputStream();
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73 copyAll(in,out);
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74 return out.toByteArray();
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75 }
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76 /*
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77 public static boolean exists(File file) {
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78 try {
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79 return file.exists() && file.getName().equals(file.getCanonicalFile().getName());
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80 } catch(IOException e) {
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81 throw new RuntimeException(e);
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82 }
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83 }
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84 */
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85 /*
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86 private static File toFile(String path) {
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87 if( path.contains("//") )
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88 return null;
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89 File file = new File(path);
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90 return file.exists() ? file : null;
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91 }
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93 private static URL toUrl(String path) {
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94 if( path.indexOf(':') == -1 )
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95 return null;
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96 if( path.startsWith("classpath:") ) {
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97 path = path.substring(10);
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98 if( path.contains("//") )
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99 return null;
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100 URL url;
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101 if( !path.contains("#") ) {
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102 url = ClassLoader.getSystemResource(path);
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103 } else {
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104 String[] a = path.split("#");
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105 url = ClassLoader.getSystemResource(a[0]);
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106 if( url==null ) {
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107 for( int i=1; i<a.length; i++ ) {
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108 url = ClassLoader.getSystemResource(a[0]+"/"+a[i]);
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109 if( url != null ) {
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110 try {
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111 url = new URL(url,".");
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112 } catch(MalformedURLException e) {
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113 throw new RuntimeException(e);
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114 }
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115 break;
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116 }
216
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117 }
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118 }
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119 }
203
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120 return url==null ? null : url;
143
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121 }
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122 try {
203
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123 return new URL(path);
143
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124 } catch(MalformedURLException e) {}
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125 return null;
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126 }
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127
260
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128 static boolean exists(String path) {
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129 return toFile(path)!=null || toUrl(path)!=null;
143
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130 }
260
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131 */
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132 }