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annotate src/luan/modules/Utils.java @ 1367:836e00bf7ce2

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add Lucene backup_to
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 18 Jun 2019 16:27:03 -0600
parents 1a68fc55a80c
children eb8b35dccd99
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167
4c0131c2b650 merge luan/lib into modules
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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.io.InputStreamReader;
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10 import java.net.URL;
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11 import java.net.MalformedURLException;
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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(Object v,String expected,int pos) throws LuanException {
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23 if( v == null )
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24 throw new LuanException("bad argument #"+pos+" ("+expected+" expected, got nil)");
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25 }
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26
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27 public static void checkNotNull(String s,int pos) throws LuanException {
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28 checkNotNull(s,"string",pos);
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29 }
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31 public static void checkNotNull(String s) throws LuanException {
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32 checkNotNull(s,1);
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33 }
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34
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35 public static void checkNotNull(byte[] b,int pos) throws LuanException {
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36 checkNotNull(b,"binary",pos);
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37 }
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39 public static void checkNotNull(byte[] b) throws LuanException {
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40 checkNotNull(b,1);
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41 }
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42
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43 public static void checkNotNull(LuanTable t,int pos) throws LuanException {
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44 checkNotNull(t,"table",pos);
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45 }
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47 public static void checkNotNull(LuanTable t) throws LuanException {
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48 checkNotNull(t,1);
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49 }
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51 public static void checkNotNull(Number n,int pos) throws LuanException {
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52 checkNotNull(n,"number",pos);
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53 }
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55 public static void checkNotNull(Number n) throws LuanException {
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56 checkNotNull(n,1);
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57 }
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58
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59 public static void checkNotNull(LuanFunction fn,int pos) throws LuanException {
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60 checkNotNull(fn,"function",pos);
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61 }
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63 public static void checkNotNull(LuanFunction fn) throws LuanException {
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64 checkNotNull(fn,1);
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65 }
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67 public static String readAll(Reader in)
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68 throws IOException
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69 {
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70 char[] a = new char[bufSize];
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71 StringBuilder buf = new StringBuilder();
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72 int n;
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73 while( (n=in.read(a)) != -1 ) {
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74 buf.append(a,0,n);
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75 }
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76 return buf.toString();
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77 }
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79 public static void copyAll(InputStream in,OutputStream out)
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80 throws IOException
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81 {
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82 byte[] a = new byte[bufSize];
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83 int n;
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84 while( (n=in.read(a)) != -1 ) {
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85 out.write(a,0,n);
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86 }
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87 }
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88
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89 public static byte[] readAll(InputStream in)
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90 throws IOException
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91 {
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92 ByteArrayOutputStream out = new ByteArrayOutputStream();
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93 copyAll(in,out);
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94 return out.toByteArray();
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95 }
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97 }