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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 private XmlElement parent = null;
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11
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12 public XmlElement(String name,Map<String,String> attributes) {
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13 this.name = name;
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14 this.attributes = attributes;
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15 this.content = null;
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16 }
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17
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18 public XmlElement getParent() {
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19 return parent;
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20 }
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21
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22 public Object getContent() {
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23 return content;
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24 }
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25
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26 public void removeContent() {
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27 content = null;
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28 }
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29
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30 public void setContent(String content) {
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31 if( content == null )
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32 throw new IllegalArgumentException("content can't be null");
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33 this.content = content;
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34 }
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35
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36 public void setContent(XmlElement[] content) {
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37 if( content == null )
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38 throw new IllegalArgumentException("content can't be null");
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39 if( content.length == 0 )
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40 throw new IllegalArgumentException("content can't be empty");
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41 this.content = content;
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42 for( XmlElement el : content ) {
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43 el.parent = this;
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44 }
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45 }
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46
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47 @Override public String toString() {
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48 StringBuilder sb = new StringBuilder();
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49 toString(sb,0);
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50 return sb.toString();
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51 }
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52
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53 void toString(StringBuilder sb,int indented) {
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54 indent(sb,indented);
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55 sb.append( '<' );
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56 sb.append( name );
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57 for( Map.Entry<String,String> attribute : attributes.entrySet() ) {
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58 sb.append( ' ' );
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59 sb.append( attribute.getKey() );
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60 sb.append( "=\"" );
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61 sb.append( encodeAttr(attribute.getValue()) );
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62 sb.append( '"' );
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63 }
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64 if( content == null ) {
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65 sb.append( "/>\n" );
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66 } else if( content instanceof String ) {
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67 sb.append( '>' );
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68 String s = (String)content;
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69 sb.append( encode(s) );
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70 closeTag(sb,name);
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71 } else {
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72 sb.append( '>' );
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73 XmlElement[] elements = (XmlElement[])content;
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74 sb.append( '\n' );
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75 for( XmlElement element : elements ) {
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76 element.toString(sb,indented+1);
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77 }
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78 indent(sb,indented);
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79 closeTag(sb,name);
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80 }
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81 }
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82
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83 private static void closeTag(StringBuilder sb,String name) {
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84 sb.append( "</" );
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85 sb.append( name );
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86 sb.append( ">\n" );
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87 }
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88
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89 private static void indent(StringBuilder sb,int indented) {
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90 for( int i=0; i<indented; i++ ) {
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91 sb.append('\t');
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92 }
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93 }
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94
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95 public static String encode(String s) {
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96 final char[] a = s.toCharArray();
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97 StringBuilder buf = new StringBuilder();
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98 for( char c : a ) {
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99 switch(c) {
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100 case '&':
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101 buf.append("&");
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102 break;
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103 case '<':
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104 buf.append("<");
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105 break;
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106 case '>':
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107 buf.append(">");
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108 break;
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109 case '"':
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110 buf.append(""");
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111 break;
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112 case '\'':
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113 buf.append("'");
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114 break;
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115 default:
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116 buf.append(c);
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117 }
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118 }
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119 return buf.toString();
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120 }
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121
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122 public static String encodeAttr(String s) {
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123 final char[] a = s.toCharArray();
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124 StringBuilder buf = new StringBuilder();
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125 for( char c : a ) {
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126 switch(c) {
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127 case '&':
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128 buf.append("&");
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129 break;
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130 case '<':
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131 buf.append("<");
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132 break;
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133 case '>':
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134 buf.append(">");
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135 break;
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136 case '"':
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137 buf.append(""");
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138 break;
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139 case '\'':
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140 buf.append("'");
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141 break;
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142 case '\n':
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143 buf.append(" ");
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144 break;
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145 case '\r':
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146 buf.append(" ");
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147 break;
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148 default:
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149 buf.append(c);
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150 }
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151 }
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152 return buf.toString();
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153 }
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154
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155 }
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