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1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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2 * The contents of this file are subject to the Mozilla Public
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3 * License Version 1.1 (the "License"); you may not use this file
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4 * except in compliance with the License. You may obtain a copy of
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5 * the License at http://www.mozilla.org/MPL/
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6 *
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7 * Software distributed under the License is distributed on an "AS
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8 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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9 * implied. See the License for the specific language governing
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10 * rights and limitations under the License.
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11 *
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12 * The Original Code is rdfds
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13 *
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14 * The Initial Developer of the Original Code is Neil Deakin
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15 * Portions created by Neil Deakin are Copyright (C) 2002 Neil Deakin.
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16 * All Rights Reserved.
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17 *
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18 * Contributor(s):
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19 */
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20
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21 /* This is a library for easier access to RDF datasources and resources.
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22 * It contains four objects, RDFDataSource, RDFNode, RDFLiteral. and
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23 * RDFEnumerator.
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24 *
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25 * An RDF DataSource is a graph of nodes and literals. The constructor
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26 * for RDFDataSource takes one argument, a URI of an RDF file to use.
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27 * If the URI exists, the contents of the RDF file are loaded. If it
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28 * does not exist, resources can be added to it and then written using
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29 * this save method. If the URL argument is null, a blank datasource
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30 * is created.
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31 *
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32 * This library is designed for convenience not for efficiency.
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33 *
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34 * The API is documented at:
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35 * http://www.xulplanet.com/tutorials/xultu/rdfds/
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36 *
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37 * Example:
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38 *
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39 * var ds=new RDFDataSource("file:///main/mozilla/mimtest.rdf");
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40 * var node=ds.getNode("urn:xpimaker:packlist");
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41 * var child=ds.getNode("urn:xpimaker:packlist:appinfo");
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42 * child=node.addChild(child);
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43 * child.addTarget("http://www.xulplanet.com/rdf/xpimaker#appname","Find Files");
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44 * ds.save();
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45 *
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46 */
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47
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48 var RDFService = "@mozilla.org/rdf/rdf-service;1";
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49 RDFService = Components.classes[RDFService].getService();
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50 RDFService = RDFService.QueryInterface(Components.interfaces.nsIRDFService);
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51
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52 var RDFContainerUtilsService = "@mozilla.org/rdf/container-utils;1";
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53 RDFContainerUtilsService = Components.classes[RDFContainerUtilsService].getService();
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54 RDFContainerUtilsService = RDFContainerUtilsService.QueryInterface(Components.interfaces.nsIRDFContainerUtils);
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55
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56 /* RDFLoadObserver
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57 * this object is necessary to listen to RDF files being loaded. The Init
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58 * function should be called to initialize the callback when the RDF file is
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59 * loaded.
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60 */
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61 function RDFLoadObserver(){}
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62
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63 RDFLoadObserver.prototype =
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64 {
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65 callback: null,
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66 callbackDataSource: null,
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67
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68 Init: function(c,cDS){
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69 this.callback=c;
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70 this.callbackDataSource=cDS;
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71 },
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72
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73 QueryInterface: function(iid){
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74 if (iid.equals(Components.interfaces.nsIRDFXMLSinkObserver)) return this;
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75 else throw Components.results.NS_ERROR_NO_INTERFACE;
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76 },
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77
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78 onBeginLoad : function(sink){},
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79 onInterrupt : function(sink){},
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80 onResume : function(sink){},
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81 onError : function(sink,status,msg){},
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82
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83 onEndLoad : function(sink){
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84 if (this.callback!=null) this.callback(this.callbackDataSource);
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85 }
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86 };
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87
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88 function RDFDataSource(uri,callbackFn)
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89 {
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90 if (uri==null) this.datasource=null;
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91 else this.load(uri,callbackFn);
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92 }
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93
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94 RDFDataSource.prototype.load=
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95 function(uri,callbackFn)
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96 {
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97 if (uri.indexOf(":") == -1){
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98 var docurl=document.location.href;
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99 if (document.location.pathname == null) uri=docurl+"/"+uri;
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100 else uri=docurl.substring(0,docurl.lastIndexOf("/")+1)+uri;
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101 }
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102
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103 if (callbackFn == null){
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104 this.datasource=RDFService.GetDataSourceBlocking(uri);
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105 }
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106 else {
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107 this.datasource=RDFService.GetDataSource(uri);
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108 var ds;
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109 try {
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110 var ds=this.datasource.QueryInterface(Components.interfaces.nsIRDFRemoteDataSource);
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111 }
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112 catch (ex){
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113 callbackFn(this);
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114 return;
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115 }
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116 if (ds.loaded){
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117 callbackFn(this);
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118 return;
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119 }
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120
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121 var packObserver=new RDFLoadObserver();
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122 packObserver.Init(callbackFn,this);
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123
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124 var rawsource=this.datasource;
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125 rawsource=rawsource.QueryInterface(Components.interfaces.nsIRDFXMLSink);
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126 rawsource.addXMLSinkObserver(packObserver);
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127 }
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128 }
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129
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130 RDFDataSource.prototype.Init=
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131 function (dsource)
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132 {
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133 this.datasource=dsource;
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134 }
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135
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136 RDFDataSource.prototype.parseFromString=
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137 function (str,baseUri)
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138 {
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139 if (this.datasource==null) this.makeemptyds();
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140 var ios=Components.classes["@mozilla.org/network/io-service;1"]
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141 .getService(Components.interfaces.nsIIOService);
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142 baseUri=ios.newURI(baseUri,null,null);
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143 var xmlParser=Components.classes["@mozilla.org/rdf/xml-parser;1"]
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144 .createInstance(Components.interfaces.nsIRDFXMLParser);
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145 xmlParser.parseString(this.datasource,baseUri,str);
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146 }
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147
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148 RDFDataSource.prototype.serializeToString=
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149 function ()
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150 {
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151 var outputStream = {
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152 data: "",
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153 close : function(){},
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154 flush : function(){},
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155 write : function (buffer,count){
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156 this.data += buffer;
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157 return count;
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158 },
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159 writeFrom : function (stream,count){},
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160 isNonBlocking: false
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161 }
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162 this.serializeToStream(outputStream);
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163 return outputStream.data;
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164 }
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165
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166 RDFDataSource.prototype.serializeToStream=
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167 function (outputStream)
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168 {
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169 var ser=Components.classes["@mozilla.org/rdf/xml-serializer;1"]
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170 .createInstance(Components.interfaces.nsIRDFXMLSerializer);
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171 ser.init(this.datasource);
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172 ser.QueryInterface(Components.interfaces.nsIRDFXMLSource).Serialize(outputStream);
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173 }
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174
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175 RDFDataSource.prototype.makeemptyds=
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176 function (uri)
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177 {
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178 this.datasource=Components.classes["@mozilla.org/rdf/datasource;1?name=in-memory-datasource"]
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179 .createInstance(Components.interfaces.nsIRDFDataSource);
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180 }
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181
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182 RDFDataSource.prototype.getAllResources=
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183 function ()
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184 {
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185 if (this.datasource==null) return null;
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186 return new RDFEnumerator(this.datasource.GetAllResources(),this.datasource);
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187 }
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188
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189 RDFDataSource.prototype.getRawDataSource=
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190 function ()
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191 {
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192 if (this.datasource==null) this.makeemptyds();
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193 return this.datasource;
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194 }
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195
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196 RDFDataSource.prototype.getNode=
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197 function (uri)
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198 {
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199 if (this.datasource==null) this.makeemptyds();
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200 var node=new RDFNode(uri,this);
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201 return node;
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202 }
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203
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204 RDFDataSource.prototype.getAnonymousNode=
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205 function ()
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206 {
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207 if (this.datasource==null) this.makeemptyds();
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208
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209 var anon=RDFService.GetAnonymousResource();
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210 var node=new RDFNode();
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211 node.Init(anon,this.datasource);
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212 return node;
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213 }
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214
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215 RDFDataSource.prototype.getLiteral=
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216 function (uri)
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217 {
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218 if (this.datasource==null) this.makeemptyds();
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219
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220 return new RDFLiteral(uri,this);
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221 }
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222
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223 RDFDataSource.prototype.refresh=
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224 function (sync)
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225 {
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226 try {
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227 var ds=this.datasource.QueryInterface(Components.interfaces.nsIRDFRemoteDataSource);
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228 ds.Refresh(sync);
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229 return true;
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230 }
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231 catch (ex){
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232 return false;
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233 }
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234 }
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235
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236 RDFDataSource.prototype.save=
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237 function ()
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238 {
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239 try {
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240 var ds=this.datasource.QueryInterface(Components.interfaces.nsIRDFRemoteDataSource);
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241 ds.Flush();
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242 return true;
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243 }
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244 catch (ex){
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245 return false;
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246 }
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247 }
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248
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249 RDFDataSource.prototype.copyAllToDataSource=
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250 function (dsource2)
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251 {
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252 if (this.datasource==null) this.makeemptyds();
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253 if (dsource2.datasource==null) dsource2.makeemptyds();
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254
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255 var dsource1=this.datasource;
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256 dsource2=dsource2.datasource;
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257
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258 var sourcelist=dsource1.GetAllResources();
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259 while(sourcelist.hasMoreElements()){
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260 var source=sourcelist.getNext();
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261 var props=dsource1.ArcLabelsOut(source);
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262 while(props.hasMoreElements()){
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263 var prop=props.getNext();
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264 prop=prop.QueryInterface(Components.interfaces.nsIRDFResource);
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265 var target=dsource1.GetTarget(source,prop,true);
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266 if (target!=null) dsource2.Assert(source,prop,target,true);
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267 }
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268 }
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269 }
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270
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271 RDFDataSource.prototype.deleteRecursive=
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272 function (val)
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273 {
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274 var node;
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275 var dsource=this.datasource;
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276
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277 if (dsource==null) return;
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278
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279 if (typeof val == "string") node=RDFService.GetResource(val);
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280 else node=val.source;
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281
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282 this.deleteRecursiveH(dsource,node); // remove descendants
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283
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284 // remove the node itself
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285 var props=dsource.ArcLabelsIn(node);
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286 while(props.hasMoreElements()){
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287 var prop=props.getNext();
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288 var source=dsource.GetSource(prop,node,true);
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289 dsource.Unassert(source,prop,node);
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290 }
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291 }
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292
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293 RDFDataSource.prototype.deleteRecursiveH=
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294 function (dsource,node)
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295 {
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296 var props=dsource.ArcLabelsOut(node);
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297 while(props.hasMoreElements()){
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298 var prop=props.getNext();
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299 var target=dsource.GetTarget(node,prop,true);
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300 try {
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301 target=target.QueryInterface(Components.interfaces.nsIRDFResource);
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302 this.deleteRecursiveH(dsource,target);
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303 }
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304 catch (e){}
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305 dsource.Unassert(node,prop,target)
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306 }
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307 }
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308
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309 function RDFNode(uri,dsource)
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310 {
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311 if (uri==null) this.source=null;
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312 else this.source=RDFService.GetResource(uri);
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313
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314 if (dsource==null) this.datasource=null;
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315 else this.datasource=dsource.datasource;
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316
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317 this.container=null;
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318 }
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319
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320 RDFNode.prototype.Init=
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321 function (source,dsource)
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322 {
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323 this.source=source;
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324 this.datasource=dsource;
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325 this.container=null;
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326 }
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327
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328 RDFNode.prototype.getValue=
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329 function ()
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330 {
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331 return this.source.Value;
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332 }
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333
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334 RDFNode.prototype.rlify=
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335 function (val)
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336 {
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337 var res=null;
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338
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339 if (val!=null){
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340 try {
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341 val=val.QueryInterface(Components.interfaces.nsIRDFResource);
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342 res=new RDFNode();
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343 res.Init(val,this.datasource);
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344 }
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345 catch (ex){
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346 try {
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347 val=val.QueryInterface(Components.interfaces.nsIRDFLiteral);
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348 res=new RDFLiteral();
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349 res.Init(val,this.datasource);
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350 }
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351 catch (ex2){
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352 }
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353 }
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354 }
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355 return res;
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356 }
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357
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358 RDFNode.prototype.makeres=
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359 function (val)
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360 {
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361 if (typeof val == "string") return RDFService.GetResource(val);
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362 else return val.source;
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363 }
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364
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365 RDFNode.prototype.makelit=
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366 function (val)
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367 {
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368 if (typeof val == "string") return RDFService.GetLiteral(val);
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369 else return val.source;
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370 }
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371
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372 RDFNode.prototype.makecontain=
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373 function ()
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374 {
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375 if (this.container!=null) return true;
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376
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377 var RDFContainer = '@mozilla.org/rdf/container;1';
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378 RDFContainer = Components.classes[RDFContainer].createInstance();
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379 RDFContainer = RDFContainer.QueryInterface(Components.interfaces.nsIRDFContainer);
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380
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381 try {
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382 RDFContainer.Init(this.datasource,this.source);
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383 this.container=RDFContainer;
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384 return true;
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385 }
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386 catch (ex){
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387 return false;
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388 }
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389 }
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390
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391 RDFNode.prototype.addTarget=
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392 function (prop,target)
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393 {
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394 prop=this.makeres(prop);
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395 target=this.makelit(target);
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396 this.datasource.Assert(this.source,prop,target,true);
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397 }
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398
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399 RDFNode.prototype.addTargetOnce=
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400 function (prop,target)
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401 {
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402 prop=this.makeres(prop);
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403 target=this.makelit(target);
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404
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405 var oldtarget=this.datasource.GetTarget(this.source,prop,true);
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406 if (oldtarget!=null){
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407 this.datasource.Change(this.source,prop,oldtarget,target);
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408 }
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409 else {
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410 this.datasource.Assert(this.source,prop,target,true);
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411 }
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412 }
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413
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414 RDFNode.prototype.modifyTarget=
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415 function (prop,oldtarget,newtarget)
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416 {
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417 prop=this.makeres(prop);
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418 oldtarget=this.makelit(oldtarget);
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419 newtarget=this.makelit(newtarget);
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420 this.datasource.Change(this.source,prop,oldtarget,newtarget);
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421 }
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422
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423 RDFNode.prototype.modifySource=
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424 function (prop,oldsource,newsource)
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425 {
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426 prop=this.makeres(prop);
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427 oldsource=this.makeres(oldsource);
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428 newsource=this.makeres(newsource);
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429 this.datasource.Move(oldsource,newsource,prop,this.source);
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430 }
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431
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432 RDFNode.prototype.targetExists=
|
|
|
433 function (prop,target)
|
|
|
434 {
|
|
|
435 prop=this.makeres(prop);
|
|
|
436 target=this.makelit(target);
|
|
|
437 return this.datasource.HasAssertion(this.source,prop,target,true);
|
|
|
438 }
|
|
|
439
|
|
|
440 RDFNode.prototype.removeTarget=
|
|
|
441 function (prop,target)
|
|
|
442 {
|
|
|
443 prop=this.makeres(prop);
|
|
|
444 target=this.makelit(target);
|
|
|
445 this.datasource.Unassert(this.source,prop,target);
|
|
|
446 }
|
|
|
447
|
|
|
448 RDFNode.prototype.getProperties=
|
|
|
449 function ()
|
|
|
450 {
|
|
|
451 return new RDFEnumerator(this.datasource.ArcLabelsOut(this.source),this.datasource);
|
|
|
452 }
|
|
|
453
|
|
|
454 RDFNode.prototype.getInProperties=
|
|
|
455 function ()
|
|
|
456 {
|
|
|
457 return new RDFEnumerator(this.datasource.ArcLabelsIn(this.source),this.datasource);
|
|
|
458 }
|
|
|
459
|
|
|
460 RDFNode.prototype.propertyExists=
|
|
|
461 function (prop)
|
|
|
462 {
|
|
|
463 prop=this.makeres(prop);
|
|
|
464 return this.datasource.hasArcOut(this.source,prop);
|
|
|
465 }
|
|
|
466
|
|
|
467 RDFNode.prototype.inPropertyExists=
|
|
|
468 function (prop)
|
|
|
469 {
|
|
|
470 prop=this.makeres(prop);
|
|
|
471 return this.datasource.hasArcIn(this.source,prop);
|
|
|
472 }
|
|
|
473
|
|
|
474 RDFNode.prototype.getTarget=
|
|
|
475 function (prop)
|
|
|
476 {
|
|
|
477 prop=this.makeres(prop);
|
|
|
478 return this.rlify(this.datasource.GetTarget(this.source,prop,true));
|
|
|
479 }
|
|
|
480
|
|
|
481 RDFNode.prototype.getSource=
|
|
|
482 function (prop)
|
|
|
483 {
|
|
|
484 prop=this.makeres(prop);
|
|
|
485 var src=this.datasource.GetSource(prop,this.source,true);
|
|
|
486 if (src==null) return null;
|
|
|
487 var res=new RDFNode();
|
|
|
488 res.Init(src,this.datasource);
|
|
|
489 return res;
|
|
|
490 }
|
|
|
491
|
|
|
492 RDFNode.prototype.getTargets=
|
|
|
493 function (prop)
|
|
|
494 {
|
|
|
495 prop=this.makeres(prop);
|
|
|
496 return new RDFEnumerator(
|
|
|
497 this.datasource.GetTargets(this.source,prop,true),this.datasource);
|
|
|
498 }
|
|
|
499
|
|
|
500 RDFNode.prototype.getSources=
|
|
|
501 function (prop)
|
|
|
502 {
|
|
|
503 prop=this.makeres(prop);
|
|
|
504 return new RDFEnumerator(
|
|
|
505 this.datasource.GetSources(prop,this.source,true),this.datasource);
|
|
|
506 }
|
|
|
507
|
|
|
508 RDFNode.prototype.makeBag=
|
|
|
509 function ()
|
|
|
510 {
|
|
|
511 this.container=RDFContainerUtilsService.MakeBag(this.datasource,this.source);
|
|
|
512 }
|
|
|
513
|
|
|
514 RDFNode.prototype.makeSeq=
|
|
|
515 function ()
|
|
|
516 {
|
|
|
517 this.container=RDFContainerUtilsService.MakeSeq(this.datasource,this.source);
|
|
|
518 }
|
|
|
519
|
|
|
520 RDFNode.prototype.makeAlt=
|
|
|
521 function ()
|
|
|
522 {
|
|
|
523 this.container=RDFContainerUtilsService.MakeAlt(this.datasource,this.source);
|
|
|
524 }
|
|
|
525
|
|
|
526 RDFNode.prototype.isBag=
|
|
|
527 function ()
|
|
|
528 {
|
|
|
529 return RDFContainerUtilsService.isBag(this.datasource,this.source);
|
|
|
530 }
|
|
|
531
|
|
|
532 RDFNode.prototype.isSeq=
|
|
|
533 function ()
|
|
|
534 {
|
|
|
535 return RDFContainerUtilsService.isSeq(this.datasource,this.source);
|
|
|
536 }
|
|
|
537
|
|
|
538 RDFNode.prototype.isAlt=
|
|
|
539 function ()
|
|
|
540 {
|
|
|
541 return RDFContainerUtilsService.isAlt(dsource,this.source);
|
|
|
542 }
|
|
|
543
|
|
|
544 RDFNode.prototype.isContainer=
|
|
|
545 function ()
|
|
|
546 {
|
|
|
547 return RDFContainerUtilsService.IsContainer(this.datasource,this.source);
|
|
|
548 }
|
|
|
549
|
|
|
550 RDFNode.prototype.getChildCount=
|
|
|
551 function ()
|
|
|
552 {
|
|
|
553 if (this.makecontain()){
|
|
|
554 return this.container.GetCount();
|
|
|
555 }
|
|
|
556 return -1;
|
|
|
557 }
|
|
|
558
|
|
|
559 RDFNode.prototype.getChildren=
|
|
|
560 function ()
|
|
|
561 {
|
|
|
562 if (this.makecontain()){
|
|
|
563 return new RDFEnumerator(this.container.GetElements(),this.datasource);
|
|
|
564 }
|
|
|
565 else return null;
|
|
|
566 }
|
|
|
567
|
|
|
568 RDFNode.prototype.addChild=
|
|
|
569 function (child,exists)
|
|
|
570 {
|
|
|
571 if (this.makecontain()){
|
|
|
572 var childres=null;
|
|
|
573 if (typeof child == "string"){
|
|
|
574 childres=RDFService.GetResource(child);
|
|
|
575 child=new RDFNode();
|
|
|
576 child.Init(childres,this.datasource);
|
|
|
577 }
|
|
|
578 else childres=child.source;
|
|
|
579
|
|
|
580 if (!exists && this.container.IndexOf(childres)>=0) return child;
|
|
|
581
|
|
|
582 this.container.AppendElement(childres);
|
|
|
583 return child;
|
|
|
584 }
|
|
|
585 else return null;
|
|
|
586 }
|
|
|
587
|
|
|
588 RDFNode.prototype.addChildAt=
|
|
|
589 function (child,idx)
|
|
|
590 {
|
|
|
591 if (this.makecontain()){
|
|
|
592 var childres=null;
|
|
|
593 if (typeof child == "string"){
|
|
|
594 childres=RDFService.GetResource(child);
|
|
|
595 child=new RDFNode();
|
|
|
596 child.Init(childres,this.datasource);
|
|
|
597 }
|
|
|
598 else childres=child.source;
|
|
|
599 this.container.InsertElementAt(childres,idx,true);
|
|
|
600 return child;
|
|
|
601 }
|
|
|
602 else return null;
|
|
|
603 }
|
|
|
604
|
|
|
605 RDFNode.prototype.removeChild=
|
|
|
606 function (child)
|
|
|
607 {
|
|
|
608 if (this.makecontain()){
|
|
|
609 var childres=null;
|
|
|
610 if (typeof child == "string"){
|
|
|
611 childres=RDFService.GetResource(child);
|
|
|
612 child=new RDFNode();
|
|
|
613 child.Init(childres,this.datasource);
|
|
|
614 }
|
|
|
615 else childres=child.source;
|
|
|
616 this.container.RemoveElement(childres,true);
|
|
|
617 return child;
|
|
|
618 }
|
|
|
619 else return null;
|
|
|
620 }
|
|
|
621
|
|
|
622 RDFNode.prototype.removeChildAt=
|
|
|
623 function (idx)
|
|
|
624 {
|
|
|
625 if (this.makecontain()){
|
|
|
626 var childres=this.container.RemoveElementAt(idx,true);
|
|
|
627 return this.rlify(childres);
|
|
|
628 }
|
|
|
629 else return null;
|
|
|
630 }
|
|
|
631
|
|
|
632 RDFNode.prototype.getChildIndex=
|
|
|
633 function (child)
|
|
|
634 {
|
|
|
635 if (this.makecontain()){
|
|
|
636 return this.container.IndexOf(child.source);
|
|
|
637 }
|
|
|
638 else return -1;
|
|
|
639 }
|
|
|
640
|
|
|
641 RDFNode.prototype.type="Node";
|
|
|
642
|
|
|
643
|
|
|
644 function RDFLiteral(val,dsource)
|
|
|
645 {
|
|
|
646 if (val==null) this.source=null;
|
|
|
647 else this.source=RDFService.GetLiteral(val);
|
|
|
648
|
|
|
649 if (dsource==null) this.datasource=null;
|
|
|
650 else this.datasource=dsource.datasource;
|
|
|
651 }
|
|
|
652
|
|
|
653 RDFLiteral.prototype.Init=
|
|
|
654 function (source,dsource)
|
|
|
655 {
|
|
|
656 this.source=source;
|
|
|
657 this.datasource=dsource;
|
|
|
658 }
|
|
|
659
|
|
|
660 RDFLiteral.prototype.getValue=
|
|
|
661 function ()
|
|
|
662 {
|
|
|
663 return this.source.Value;
|
|
|
664 }
|
|
|
665
|
|
|
666 RDFLiteral.prototype.makeres=
|
|
|
667 function (val)
|
|
|
668 {
|
|
|
669 if (typeof val == "string") return RDFService.GetResource(val);
|
|
|
670 else return val.source;
|
|
|
671 }
|
|
|
672
|
|
|
673 RDFLiteral.prototype.makelit=
|
|
|
674 function (val)
|
|
|
675 {
|
|
|
676 if (typeof val == "string") return RDFService.GetLiteral(val);
|
|
|
677 else return val.source;
|
|
|
678 }
|
|
|
679
|
|
|
680 RDFLiteral.prototype.modifySource=
|
|
|
681 function (prop,oldsource,newsource)
|
|
|
682 {
|
|
|
683 prop=this.makeres(prop);
|
|
|
684 oldsource=this.makeres(oldsource);
|
|
|
685 newsource=this.makeres(newsource);
|
|
|
686 this.datasource.Move(oldsource,newsource,prop,this.source);
|
|
|
687 }
|
|
|
688
|
|
|
689 RDFLiteral.prototype.getInProperties=
|
|
|
690 function (prop)
|
|
|
691 {
|
|
|
692 return new RDFEnumerator(this.datasource.ArcLabelsIn(this.source),this.datasource);
|
|
|
693 }
|
|
|
694
|
|
|
695 RDFLiteral.prototype.inPropertyExists=
|
|
|
696 function (prop)
|
|
|
697 {
|
|
|
698 prop=this.makeres(prop);
|
|
|
699 return this.datasource.hasArcIn(this.source,prop);
|
|
|
700 }
|
|
|
701
|
|
|
702 RDFLiteral.prototype.getSource=
|
|
|
703 function (prop)
|
|
|
704 {
|
|
|
705 prop=this.makeres(prop);
|
|
|
706 var src=this.datasource.GetSource(prop,this.source,true);
|
|
|
707 if (src==null) return null;
|
|
|
708 var res=new RDFNode();
|
|
|
709 res.Init(src,this.datasource);
|
|
|
710 return res;
|
|
|
711 }
|
|
|
712
|
|
|
713 RDFLiteral.prototype.getSources=
|
|
|
714 function (prop)
|
|
|
715 {
|
|
|
716 prop=this.makeres(prop);
|
|
|
717 return new RDFEnumerator(
|
|
|
718 this.datasource.GetSources(prop,this.source,true),this.datasource);
|
|
|
719 }
|
|
|
720
|
|
|
721 RDFLiteral.prototype.type="Literal";
|
|
|
722
|
|
|
723
|
|
|
724 function RDFEnumerator(enumeration,dsource)
|
|
|
725 {
|
|
|
726 this.enumeration=enumeration;
|
|
|
727 this.datasource=dsource;
|
|
|
728 }
|
|
|
729
|
|
|
730 RDFEnumerator.prototype.hasMoreElements=
|
|
|
731 function ()
|
|
|
732 {
|
|
|
733 return this.enumeration.hasMoreElements();
|
|
|
734 }
|
|
|
735
|
|
|
736 RDFEnumerator.prototype.getNext=
|
|
|
737 function ()
|
|
|
738 {
|
|
|
739 var res=null;
|
|
|
740 var val=this.enumeration.getNext();
|
|
|
741
|
|
|
742 if (val!=null){
|
|
|
743 try {
|
|
|
744 val=val.QueryInterface(Components.interfaces.nsIRDFResource);
|
|
|
745 res=new RDFNode();
|
|
|
746 res.Init(val,this.datasource);
|
|
|
747 }
|
|
|
748 catch (ex){
|
|
|
749 try {
|
|
|
750 val=val.QueryInterface(Components.interfaces.nsIRDFLiteral);
|
|
|
751 res=new RDFLiteral();
|
|
|
752 res.Init(val,this.datasource);
|
|
|
753 }
|
|
|
754 catch (ex2){
|
|
|
755 }
|
|
|
756 }
|
|
|
757 }
|
|
|
758 return res;
|
|
|
759 }
|
|
|
760
|
