Mercurial Hosting > luan
annotate src/luan/modules/parsers/LuanToString.java @ 1388:2024d23ddd64
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author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 03 Sep 2019 22:12:53 -0600 |
parents | db7d31f4089a |
children | 9103a61e64bc |
rev | line source |
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1189 | 1 package luan.modules.parsers; |
720 | 2 |
3 import java.util.List; | |
4 import java.util.Map; | |
1189 | 5 import luan.Luan; |
6 import luan.LuanTable; | |
7 import luan.LuanException; | |
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8 import luan.LuanRuntimeException; |
720 | 9 |
10 | |
1189 | 11 public final class LuanToString { |
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12 public boolean strict = false; |
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13 public boolean numberTypes = false; |
720 | 14 |
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15 public String toString(Object obj) throws LuanException { |
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16 StringBuilder sb = new StringBuilder(); |
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17 toString(obj,sb,0); |
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18 return sb.toString(); |
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19 } |
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20 |
1189 | 21 private void toString(Object obj,StringBuilder sb,int indented) throws LuanException { |
22 if( obj == null ) { | |
23 sb.append( "nil" ); | |
24 return; | |
25 } | |
26 if( obj instanceof Boolean ) { | |
27 sb.append( obj ); | |
28 return; | |
29 } | |
30 if( obj instanceof Number ) { | |
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31 toString((Number)obj,sb); |
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32 return; |
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33 } |
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34 if( obj instanceof String ) { |
1190 | 35 sb.append( '"' ); |
36 sb.append( Luan.stringEncode((String)obj) ); | |
37 sb.append( '"' ); | |
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38 return; |
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39 } |
1189 | 40 if( obj instanceof LuanTable ) { |
41 toString((LuanTable)obj,sb,indented); | |
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42 return; |
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43 } |
1189 | 44 if( strict ) |
45 throw new LuanException("can't handle type "+obj.getClass().getName()); | |
46 sb.append( '<' ); | |
47 sb.append( obj ); | |
48 sb.append( '>' ); | |
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49 } |
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50 |
1189 | 51 private void toString(LuanTable tbl,StringBuilder sb,int indented) throws LuanException { |
52 List list = tbl.asList(); | |
53 Map map = tbl.rawMap(); | |
54 sb.append( '{' ); | |
55 if( !list.isEmpty() ) { | |
56 indent(sb,indented+1); | |
57 for( Object obj : list ) { | |
58 toString(obj,sb,indented+1); | |
59 sb.append( ", " ); | |
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60 } |
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61 } |
1189 | 62 for( Object obj : map.entrySet() ) { |
63 Map.Entry entry = (Map.Entry)obj; | |
1116 | 64 indent(sb,indented+1); |
1189 | 65 toString(entry,sb,indented+1); |
66 } | |
67 if( !list.isEmpty() || !map.isEmpty() ) | |
1116 | 68 indent(sb,indented); |
1189 | 69 sb.append( '}' ); |
1115
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70 return; |
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71 } |
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72 |
1189 | 73 private void toString(Map.Entry entry,StringBuilder sb,int indented) throws LuanException { |
74 Object key = entry.getKey(); | |
75 if( key instanceof String && ((String)key).matches("[a-zA-Z_][a-zA-Z_0-9]*") ) { | |
76 sb.append( (String)key ); | |
77 } else { | |
78 sb.append( '[' ); | |
79 toString( key, sb, indented ); | |
80 sb.append( ']' ); | |
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81 } |
1189 | 82 sb.append( " = " ); |
83 toString( entry.getValue(), sb, indented ); | |
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84 } |
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85 |
1189 | 86 private void indent(StringBuilder sb,int indented) { |
87 sb.append( '\n' ); | |
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88 for( int i=0; i<indented; i++ ) { |
1189 | 89 sb.append( '\t' ); |
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90 } |
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91 } |
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92 |
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93 private void toString(Number n,StringBuilder sb) throws LuanException { |
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94 if( numberTypes ) { |
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95 sb.append( n.getClass().getSimpleName().toLowerCase() ); |
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96 sb.append( '(' ); |
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97 } |
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98 sb.append( Luan.toString(n) ); |
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99 if( numberTypes ) |
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100 sb.append( ')' ); |
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101 } |
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102 |
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103 public static void addNumberTypes(LuanTable env) { |
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104 try { |
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105 LuanTable module = (LuanTable)env.luan().require("luan:Number.luan"); |
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106 env.put( "double", module.fn("double") ); |
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107 env.put( "float", module.fn("float") ); |
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108 env.put( "integer", module.fn("integer") ); |
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109 env.put( "long", module.fn("long") ); |
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110 } catch(LuanException e) { |
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111 throw new LuanRuntimeException(e); |
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112 } |
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113 } |
720 | 114 } |