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annotate src/goodjava/webserver/Util.java @ 1625:57c8baadb357

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handle UnsupportedClassVersionError
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 05 Sep 2021 12:32:27 -0600
parents 27efb1fcbcb5
children
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rev   line source
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27efb1fcbcb5 move luan.lib to goodjava
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1 package goodjava.webserver;
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2
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3 import java.io.UnsupportedEncodingException;
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4 import java.net.URLEncoder;
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5 import java.util.Map;
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6 import java.util.List;
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7 import java.util.ArrayList;
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8
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9
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10 final class Util {
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11
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12 static String urlEncode(String s) {
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13 try {
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14 return URLEncoder.encode(s,"UTF-8");
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15 } catch(UnsupportedEncodingException e) {
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16 throw new RuntimeException(e);
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17 }
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18 }
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19
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20 static void add(Map<String,Object> map,String name,Object value) {
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21 Object current = map.get(name);
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22 if( current == null ) {
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23 map.put(name,value);
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24 } else if( current instanceof List ) {
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25 List list = (List)current;
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26 list.add(value);
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27 } else {
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28 List list = new ArrayList();
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29 list.add(current);
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30 list.add(value);
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31 map.put(name,list);
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32 }
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33 }
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34
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35 static String toString(byte[] a,String charset) throws UnsupportedEncodingException {
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36 if( charset != null )
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37 return new String(a,charset);
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38 char[] ac = new char[a.length];
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39 for( int i=0; i<a.length; i++ ) {
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40 ac[i] = (char)a[i];
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41 }
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42 return new String(ac);
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43 }
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44
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45 static byte[] toBytes(String s) {
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46 char[] ac = s.toCharArray();
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47 byte[] a = new byte[ac.length];
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48 for( int i=0; i<ac.length; i++ ) {
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49 a[i] = (byte)ac[i];
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50 }
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51 return a;
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52 }
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53
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54 private Util() {} // never
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55 }