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1466
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1 package goodjava.xml;
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2
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3 import java.util.Map;
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4
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5
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6 public final class XmlElement {
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7 public final String name;
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8 public final Map<String,String> attributes;
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1790
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9 private Object content = null;
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10
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11 public XmlElement(String name,Map<String,String> attributes) {
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12 this.name = name;
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13 this.attributes = attributes;
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14 this.content = null;
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15 }
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16
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1790
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17 public Object getContent() {
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18 return content;
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19 }
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20
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21 public void removeContent() {
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22 content = null;
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23 }
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24
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25 public void setContent(String content) {
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26 if( content == null )
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27 throw new IllegalArgumentException("content can't be null");
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28 this.content = content;
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29 }
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30
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31 public void setContent(XmlElement[] content) {
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32 if( content == null )
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33 throw new IllegalArgumentException("content can't be null");
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34 if( content.length == 0 )
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35 throw new IllegalArgumentException("content can't be empty");
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36 this.content = content;
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37 }
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38
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39 @Override public String toString() {
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40 StringBuilder sb = new StringBuilder();
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41 toString(sb,0);
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42 return sb.toString();
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43 }
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44
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45 void toString(StringBuilder sb,int indented) {
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46 indent(sb,indented);
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47 sb.append( '<' );
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48 sb.append( name );
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49 for( Map.Entry<String,String> attribute : attributes.entrySet() ) {
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50 sb.append( ' ' );
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51 sb.append( attribute.getKey() );
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52 sb.append( "=\"" );
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53 sb.append( encode(attribute.getValue()) );
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54 sb.append( '"' );
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55 }
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56 if( content == null ) {
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57 sb.append( "/>\n" );
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58 } else if( content instanceof String ) {
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59 sb.append( '>' );
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60 String s = (String)content;
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61 sb.append( encode(s) );
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62 closeTag(sb,name);
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63 } else {
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64 sb.append( '>' );
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65 XmlElement[] elements = (XmlElement[])content;
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66 sb.append( '\n' );
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67 for( XmlElement element : elements ) {
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68 element.toString(sb,indented+1);
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69 }
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70 indent(sb,indented);
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71 closeTag(sb,name);
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72 }
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73 }
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74
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75 private static void closeTag(StringBuilder sb,String name) {
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76 sb.append( "</" );
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77 sb.append( name );
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78 sb.append( ">\n" );
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79 }
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80
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81 private static void indent(StringBuilder sb,int indented) {
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82 for( int i=0; i<indented; i++ ) {
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83 sb.append('\t');
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84 }
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85 }
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86
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87 public static String encode(String s) {
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88 final char[] a = s.toCharArray();
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89 StringBuilder buf = new StringBuilder();
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90 for( char c : a ) {
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91 switch(c) {
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92 case '&':
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93 buf.append("&");
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94 break;
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95 case '<':
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96 buf.append("<");
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97 break;
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98 case '>':
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99 buf.append(">");
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100 break;
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101 case '"':
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102 buf.append(""");
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103 break;
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104 case '\'':
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105 buf.append("'");
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106 break;
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107 case '\n':
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108 buf.append(" ");
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109 break;
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110 case '\r':
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111 buf.append(" ");
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112 break;
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113 default:
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114 buf.append(c);
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115 }
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116 }
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117 return buf.toString();
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118 }
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119
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120 }
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