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annotate src/luan/lib/Utils.java @ 86:6db8f286fa6c

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_ENV is per module, not global git-svn-id: https://luan-java.googlecode.com/svn/trunk@87 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Wed, 27 Feb 2013 08:03:51 +0000
parents aa7538ae5fb6
children 6ca02b188dba
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1 package luan.lib;
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3 import java.io.File;
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4 import java.io.FileReader;
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5 import java.io.InputStreamReader;
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6 import java.io.Reader;
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7 import java.io.IOException;
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8 import java.net.URL;
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9 import luan.LuanState;
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10 import luan.LuanException;
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11 import luan.LuanElement;
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14 public final class Utils {
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15 private Utils() {} // never
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17 public static void checkNotNull(LuanState luan,Object v,String expected) throws LuanException {
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18 if( v == null )
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19 throw new LuanException(luan,LuanElement.JAVA,"bad argument #1 ("+expected+" expected, got nil)");
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20 }
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22 public static String readAll(Reader in)
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23 throws IOException
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24 {
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25 char[] a = new char[8192];
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26 StringBuilder buf = new StringBuilder();
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27 int n;
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28 while( (n=in.read(a)) != -1 ) {
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29 buf.append(a,0,n);
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30 }
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31 return buf.toString();
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32 }
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34 public static String read(File file)
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35 throws IOException
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36 {
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37 Reader in = new FileReader(file);
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38 String s = readAll(in);
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39 in.close();
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40 return s;
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41 }
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43 public static String read(URL url)
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44 throws IOException
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45 {
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46 Reader in = new InputStreamReader(url.openStream());
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47 String s = readAll(in);
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48 in.close();
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49 return s;
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50 }
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52 }