js RDF Parser

作者: admin 分类: JavaScript 发布时间: 2014-12-02 18:38 ė2,174 浏览数 6没有评论

const PREFIX_NS_EM = "http://www.mozilla.org/2004/em-rdf#";
var xmlString = '<?xml version="1.0" encoding="utf-8"?><RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:em="http://www.mozilla.org/2004/em-rdf#"><Description about="urn:mozilla:install-manifest"><em:id>PortableTester@jetpack</em:id><em:version>initial</em:version><em:type>2</em:type><em:bootstrap>true</em:bootstrap><em:unpack>false</em:unpack><!--Firefox--><em:targetApplication><Description><em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id><em:minVersion>7.0</em:minVersion><em:maxVersion>27.0</em:maxVersion></Description></em:targetApplication><!--Front End MetaData--><em:name>PortableTester</em:name><em:description>Test addon that tries to figure out if Firefox is portable or not.</em:description><em:creator>Noitidart</em:creator><em:optionsURL>options url here</em:optionsURL></Description></RDF>';
var rdfParser = Cc['@mozilla.org/rdf/xml-parser;1'].createInstance(Ci.nsIRDFXMLParser);
var ds = Cc['@mozilla.org/rdf/datasource;1?name=in-memory-datasource'].createInstance(Ci.nsIRDFDataSource);

var emptyUri = Services.io.newURI('urn:none', null, null);
rdfParser.parseString(ds, emptyUri, xmlString);
var resources = ds.GetAllResources()
while (resources.hasMoreElements()) {
  let resource = resources.getNext().QueryInterface(Ci.nsIRDFResource);
  let arcs = ds.ArcLabelsOut(resource);
  while (arcs.hasMoreElements()) {
    let arc = arcs.getNext().QueryInterface(Ci.nsIRDFResource);
    let prop = arc.ValueUTF8.substring(PREFIX_NS_EM.length)
    let targets = ds.GetTargets(resource, arc, true);
    while (targets.hasMoreElements()) {
      let target = targets.getNext();
      if (target instanceof Ci.nsIRDFResource) {
        console.log(prop, "Resource node, recurse");
      }
      else if (target instanceof Ci.nsIRDFLiteral) {
        console.log(prop, target.Value); //are non ASCII characters encoded?
      }
      else if (target instanceof Ci.nsIRDFInt) {
        console.log(prop, target.Value);
      }
    }
  }
}

const PREFIX_NS_EM = "http://www.mozilla.org/2004/em-rdf#";

var xmlString = '<?xml version="1.0" encoding="utf-8"?><RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:em="http://www.mozilla.org/2004/em-rdf#"><Description about="urn:mozilla:install-manifest"><em:id>PortableTester@jetpack</em:id><em:version>initial</em:version><em:type>2</em:type><em:bootstrap>true</em:bootstrap><em:unpack>false</em:unpack><em:targetApplication><Description><em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id><em:minVersion>7.0</em:minVersion><em:maxVersion>27.0</em:maxVersion></Description></em:targetApplication><em:name>PortableTester</em:name><em:description>Test addon that tries to figure out if Firefox is portable or not.</em:description><em:creator>Noitidart</em:creator><em:optionsURL>options url here</em:optionsURL></Description></RDF>';

var rdfParser = Cc['@mozilla.org/rdf/xml-parser;1'].createInstance(Ci.nsIRDFXMLParser);

var ds = Cc['@mozilla.org/rdf/datasource;1?name=in-memory-datasource'].createInstance(Ci.nsIRDFDataSource);

var emptyUri = Services.io.newURI('urn:none', null, null);

rdfParser.parseString(ds, emptyUri, xmlString);

var resources = ds.GetAllResources()

while (resources.hasMoreElements()) {

let resource = resources.getNext().QueryInterface(Ci.nsIRDFResource);

let arcs = ds.ArcLabelsOut(resource);

while (arcs.hasMoreElements()) {

let arc = arcs.getNext().QueryInterface(Ci.nsIRDFResource);

let prop = arc.ValueUTF8.substring(PREFIX_NS_EM.length)

let targets = ds.GetTargets(resource, arc, true);

while (targets.hasMoreElements()) {

let target = targets.getNext();

if (target instanceof Ci.nsIRDFResource) {

console.log(prop, "Resource node, recurse");

}

else if (target instanceof Ci.nsIRDFLiteral) {

console.log(prop, target.Value); //are non ASCII characters encoded?

}

else if (target instanceof Ci.nsIRDFInt) {

console.log(prop, target.Value);

}

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