1 | /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for |
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2 | * full list of contributors). Published under the Clear BSD license. |
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3 | * See http://svn.openlayers.org/trunk/openlayers/license.txt for the |
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4 | * full text of the license. */ |
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5 | |
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6 | /** |
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7 | * @requires OpenLayers/Format/XML.js |
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8 | * |
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9 | * Class: OpenLayers.Format.WFSDescribeFeatureType |
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10 | * Read WFS DescribeFeatureType response |
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11 | * |
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12 | * Inherits from: |
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13 | * - <OpenLayers.Format.XML> |
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14 | */ |
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15 | OpenLayers.Format.WFSDescribeFeatureType = OpenLayers.Class( |
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16 | OpenLayers.Format.XML, { |
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17 | |
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18 | /** |
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19 | * Property: namespaces |
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20 | * {Object} Mapping of namespace aliases to namespace URIs. |
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21 | */ |
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22 | namespaces: { |
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23 | xsd: "http://www.w3.org/2001/XMLSchema" |
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24 | }, |
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25 | |
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26 | /** |
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27 | * Constructor: OpenLayers.Format.WFSDescribeFeatureType |
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28 | * Create a new parser for WFS DescribeFeatureType responses. |
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29 | * |
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30 | * Parameters: |
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31 | * options - {Object} An optional object whose properties will be set on |
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32 | * this instance. |
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33 | */ |
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34 | initialize: function(options) { |
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35 | OpenLayers.Format.XML.prototype.initialize.apply(this, [options]); |
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36 | }, |
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37 | |
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38 | /** |
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39 | * Property: readers |
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40 | * Contains public functions, grouped by namespace prefix, that will |
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41 | * be applied when a namespaced node is found matching the function |
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42 | * name. The function will be applied in the scope of this parser |
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43 | * with two arguments: the node being read and a context object passed |
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44 | * from the parent. |
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45 | */ |
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46 | readers: { |
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47 | "xsd": { |
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48 | "schema": function(node, obj) { |
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49 | var complexTypes = []; |
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50 | var customTypes = {}; |
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51 | var schema = { |
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52 | complexTypes: complexTypes, |
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53 | customTypes: customTypes |
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54 | }; |
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55 | |
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56 | this.readChildNodes(node, schema); |
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57 | |
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58 | var attributes = node.attributes; |
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59 | var attr, name; |
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60 | for(var i=0, len=attributes.length; i<len; ++i) { |
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61 | attr = attributes[i]; |
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62 | name = attr.name; |
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63 | if(name.indexOf("xmlns") == 0) { |
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64 | this.setNamespace(name.split(":")[1] || "", attr.value); |
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65 | } else { |
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66 | obj[name] = attr.value; |
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67 | } |
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68 | } |
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69 | obj.featureTypes = complexTypes; |
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70 | obj.targetPrefix = this.namespaceAlias[obj.targetNamespace]; |
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71 | |
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72 | // map complexTypes to names of customTypes |
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73 | var complexType, customType; |
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74 | for(var i=0, len=complexTypes.length; i<len; ++i) { |
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75 | complexType = complexTypes[i]; |
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76 | customType = customTypes[complexType.typeName]; |
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77 | if(customTypes[complexType.typeName]) { |
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78 | complexType.typeName = customType.name; |
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79 | } |
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80 | } |
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81 | }, |
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82 | "complexType": function(node, obj) { |
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83 | var complexType = { |
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84 | // this is a temporary typeName, it will be overwritten by |
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85 | // the schema reader with the metadata found in the |
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86 | // customTypes hash |
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87 | "typeName": node.getAttribute("name") |
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88 | }; |
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89 | this.readChildNodes(node, complexType); |
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90 | obj.complexTypes.push(complexType); |
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91 | }, |
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92 | "complexContent": function(node, obj) { |
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93 | this.readChildNodes(node, obj); |
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94 | }, |
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95 | "extension": function(node, obj) { |
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96 | this.readChildNodes(node, obj); |
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97 | }, |
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98 | "sequence": function(node, obj) { |
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99 | var sequence = { |
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100 | elements: [] |
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101 | }; |
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102 | this.readChildNodes(node, sequence); |
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103 | obj.properties = sequence.elements; |
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104 | }, |
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105 | "element": function(node, obj) { |
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106 | if(obj.elements) { |
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107 | var element = {}; |
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108 | var attributes = node.attributes; |
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109 | var attr; |
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110 | for(var i=0, len=attributes.length; i<len; ++i) { |
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111 | attr = attributes[i]; |
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112 | element[attr.name] = attr.value; |
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113 | } |
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114 | |
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115 | var type = element.type; |
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116 | if(!type) { |
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117 | type = {}; |
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118 | this.readChildNodes(node, type); |
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119 | element.restriction = type; |
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120 | element.type = type.base; |
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121 | } |
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122 | var fullType = type.base || type; |
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123 | element.localType = fullType.split(":").pop(); |
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124 | obj.elements.push(element); |
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125 | } |
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126 | |
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127 | if(obj.complexTypes) { |
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128 | var type = node.getAttribute("type"); |
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129 | var localType = type.split(":").pop(); |
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130 | obj.customTypes[localType] = { |
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131 | "name": node.getAttribute("name"), |
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132 | "type": type |
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133 | }; |
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134 | } |
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135 | }, |
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136 | "simpleType": function(node, obj) { |
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137 | this.readChildNodes(node, obj); |
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138 | }, |
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139 | "restriction": function(node, obj) { |
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140 | obj.base = node.getAttribute("base"); |
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141 | this.readRestriction(node, obj); |
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142 | } |
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143 | } |
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144 | }, |
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145 | |
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146 | /** |
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147 | * Method: readRestriction |
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148 | * Reads restriction defined in the child nodes of a restriction element |
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149 | * |
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150 | * Parameters: |
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151 | * node {DOMElement} - the node to parse |
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152 | * obj {Object} - the object that receives the read result |
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153 | */ |
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154 | readRestriction: function(node, obj) { |
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155 | var children = node.childNodes; |
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156 | var child, nodeName, value; |
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157 | for(var i=0, len=children.length; i<len; ++i) { |
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158 | child = children[i]; |
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159 | if(child.nodeType == 1) { |
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160 | nodeName = child.nodeName.split(":").pop(); |
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161 | value = child.getAttribute("value"); |
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162 | if(!obj[nodeName]) { |
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163 | obj[nodeName] = value; |
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164 | } else { |
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165 | if(typeof obj[nodeName] == "string") { |
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166 | obj[nodeName] = [obj[nodeName]]; |
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167 | } |
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168 | obj[nodeName].push(value); |
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169 | } |
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170 | } |
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171 | } |
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172 | }, |
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173 | |
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174 | /** |
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175 | * Method: read |
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176 | * |
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177 | * Parameters: |
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178 | * data - {DOMElement|String} A WFS DescribeFeatureType document. |
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179 | * |
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180 | * Returns: |
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181 | * {Object} An object representing the WFS DescribeFeatureType response. |
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182 | */ |
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183 | read: function(data) { |
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184 | if(typeof data == "string") { |
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185 | data = OpenLayers.Format.XML.prototype.read.apply(this, [data]); |
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186 | } |
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187 | if(data && data.nodeType == 9) { |
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188 | data = data.documentElement; |
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189 | } |
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190 | var schema = {}; |
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191 | this.readNode(data, schema); |
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192 | |
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193 | return schema; |
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194 | }, |
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195 | |
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196 | CLASS_NAME: "OpenLayers.Format.WFSDescribeFeatureType" |
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197 | |
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198 | }); |
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