--- /dev/null
+package org.simantics.xml.sax.base;\r
+\r
+import java.io.BufferedInputStream;\r
+import java.io.File;\r
+import java.io.FileInputStream;\r
+import java.io.Serializable;\r
+import java.util.ArrayDeque;\r
+import java.util.ArrayList;\r
+import java.util.Deque;\r
+import java.util.HashMap;\r
+import java.util.List;\r
+import java.util.Map;\r
+\r
+import javax.xml.parsers.SAXParser;\r
+import javax.xml.parsers.SAXParserFactory;\r
+\r
+import org.eclipse.core.runtime.IStatus;\r
+import org.eclipse.core.runtime.Status;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.message.ILogger;\r
+import org.xml.sax.Attributes;\r
+import org.xml.sax.InputSource;\r
+import org.xml.sax.SAXException;\r
+import org.xml.sax.XMLReader;\r
+import org.xml.sax.helpers.DefaultHandler;\r
+\r
+public class XMLParser extends DefaultHandler implements Serializable {\r
+\r
+ private static final long serialVersionUID = 7360740940824360338L;\r
+ private static final boolean debug = false;\r
+ private ILogger logger;\r
+ private Resource root;\r
+ private Deque<Element> current = new ArrayDeque<Element>();\r
+ private Map<String, XMLElementParser> parsers = new HashMap<String, XMLElementParser>();\r
+ private WriteGraph graph;\r
+ \r
+ private Map<Class<? extends XMLElementParser>, XMLElementParser> namedParsers = new HashMap<Class<? extends XMLElementParser>, XMLElementParser>();\r
+ \r
+ public XMLParser(WriteGraph graph) {\r
+ this.graph = graph;\r
+ }\r
+ \r
+ public void add(XMLElementParser parser) {\r
+ if (parser.getElementId() != null)\r
+ parsers.put(parser.getElementId(), parser);\r
+ namedParsers.put(parser.getClass(), parser);\r
+ }\r
+ \r
+ \r
+ private List<Element> idReferenceElements = new ArrayList<Element>();\r
+ private void loadElement(Deque<Element> parents, Element element) throws SAXException{\r
+ XMLElementParser parser = null;\r
+ Element parent = null;\r
+ if (parents.size() > 0) {\r
+ parent = parents.peek();\r
+ if (parent.getParser() instanceof XMLElementNamedChildParser) {\r
+ // use parent's named child parser if it is supported\r
+ Class<? extends XMLElementParser> parserClass = ((XMLElementNamedChildParser)parent.getParser()).getParser(parsers,parent,element);\r
+ if (parserClass != null) {\r
+ parser = namedParsers.get(parserClass);\r
+ if (parser == null) {\r
+ try {\r
+ parser = parserClass.newInstance();\r
+ namedParsers.put(parserClass, parser);\r
+ } catch (IllegalAccessException | InstantiationException e) {\r
+ String err = "Element parsers must have accessible default constructor";\r
+ logger.log(new Status(IStatus.ERROR, PLUGIN_ID, err));\r
+ throw new SAXException(err, e);\r
+ }\r
+ }\r
+ } \r
+// if (parser == null && ((XMLElementNamedChildParser)parent.getParser()).useGlobalRules())\r
+// parser = parsers.get(element.qName);\r
+ } else {\r
+ // otherwise use globally configured element parser\r
+ parser = parsers.get(element.qName);\r
+ }\r
+ } else {\r
+ // use globally configured element parser\r
+ parser = parsers.get(element.qName);\r
+ }\r
+ \r
+ if (parser != null) {\r
+ try {\r
+ \r
+ element.setData(parser.create(graph, element));\r
+ if (parser instanceof IDReferenceParser)\r
+ idReferenceElements.add(element);\r
+ element.setParser(parser);\r
+ } catch (DatabaseException e) {\r
+ throw new SAXException(e);\r
+ }\r
+ } else {\r
+ if (parent == null && parents.size() > 0)\r
+ parent = parents.peek();\r
+ String err = "Unknown element " + element.qName + ", parent " + (parent != null ? parent.getQName() : "None");\r
+ logger.log(new Status(IStatus.ERROR, PLUGIN_ID, err));\r
+ if (debug) System.err.println(err);\r
+ }\r
+ }\r
+ \r
+ private Map<String, Element> idMap = new HashMap<String, Element>();\r
+ \r
+ private void handleElement(Deque<Element> parents, Element element) throws SAXException{\r
+ XMLElementParser parser = element.getParser();\r
+ if (parser != null) {\r
+ try {\r
+ parser.configure(graph, parents, element);\r
+ if (parents.size() > 0) {\r
+ Element parent = parents.peek();\r
+ if (parent.getParser() != null) {\r
+ if (!parent.getParser().connectChild(graph, parent, element))\r
+ if (!parser.connectParent(graph, parent, element)) {\r
+ String err = "Did not connect element " + element.qName + ", parent " + (parent != null ? parent.getQName() : "None");\r
+ logger.log(new Status(IStatus.ERROR, PLUGIN_ID, err));\r
+ if (debug) System.err.println(err);\r
+ }\r
+ } else {\r
+ String err = "Did not connect element " + element.qName + ", parent " + (parent != null ? parent.getQName() : "None") + " was not imported";\r
+ logger.log(new Status(IStatus.ERROR, PLUGIN_ID, err));\r
+ if (debug) System.err.println(err);\r
+ }\r
+ }\r
+ String id = parser.getID();\r
+ if (id != null) {\r
+ Element existing = idMap.put(id, element);\r
+ if (existing != null) {\r
+ // report error + use id priorities to select the kept element.\r
+ boolean useExt = existing.parser.idPriority() > element.parser.idPriority();\r
+ if (useExt)\r
+ idMap.put(id, existing);\r
+ String err = "Duplicate XML element id: " + id + " for " + element.getQName() + " and " + existing.getQName() + ", using " + (useExt ? existing.getQName() : element.getQName());\r
+ logger.log(new Status(IStatus.ERROR, PLUGIN_ID, err));\r
+ if (debug) System.err.println(err);\r
+ }\r
+ }\r
+ } catch (DatabaseException e) {\r
+ throw new SAXException(e);\r
+ }\r
+ } else {\r
+ Element parent = parents.peek();\r
+ if (parent != null) { \r
+ parser = parent.getParser();\r
+ if (parser != null && parser instanceof UnrecognizedElementParser) {\r
+ try {\r
+ ((UnrecognizedElementParser)parser).configureChild(graph, parents, parent, element);\r
+ } catch (DatabaseException e) {\r
+ throw new SAXException(e);\r
+ }\r
+ }\r
+ }\r
+ }\r
+ }\r
+ \r
+ private void handleCharacters(Element element, String string) throws SAXException{\r
+ XMLElementParser parser = element.getParser();\r
+ if (parser != null) {\r
+ try {\r
+ parser.configure(graph, element, string);\r
+ } catch (DatabaseException e) {\r
+ logger.log(new Status(IStatus.ERROR, PLUGIN_ID, e.getMessage()));\r
+ throw new SAXException(e);\r
+ }\r
+ }\r
+ }\r
+ \r
+ private static String PLUGIN_ID = "org.simantics.xml.sax.base";\r
+ \r
+ public void done() throws SAXException{\r
+ try {\r
+ for (Element e : idReferenceElements) {\r
+ IDReferenceParser parser = (IDReferenceParser)parsers.get(e.qName);\r
+ if (!parser.connectReferences(graph, e, idMap)) {\r
+ String err ="Could not resolve ID references for " + e.getQName() + " " + e.getUri();\r
+ logger.log(new Status(IStatus.ERROR, PLUGIN_ID, err));\r
+ if (debug) System.err.println(err);\r
+ }\r
+ }\r
+ } catch (DatabaseException e) {\r
+ throw new SAXException(e);\r
+ }\r
+ }\r
+ \r
+ public Resource getRoot() {\r
+ return root;\r
+ }\r
+ \r
+ @Override\r
+ public void startElement(String uri, String localName, String name, Attributes attributes) throws SAXException {\r
+ Element e = new Element(uri,localName,name,attributes);\r
+ \r
+ loadElement(current,e);\r
+ current.push(e);\r
+ }\r
+ \r
+ @Override\r
+ public void endElement(String uri, String localName, String name)\r
+ throws SAXException {\r
+ Element e = null;\r
+ if (!current.isEmpty()) {\r
+ e = current.pop();\r
+ }\r
+ if (e != null) {\r
+ handleElement(current,e);\r
+ }\r
+ if (current.isEmpty()) {\r
+ root = e.getData();\r
+ }\r
+ }\r
+ \r
+ @Override\r
+ public void characters(char[] ch, int start, int length)\r
+ throws SAXException {\r
+ \r
+ if (!current.isEmpty()) {\r
+ String s = new String(ch,start,length);\r
+ Element e = current.peek();\r
+ handleCharacters(e, s);\r
+ }\r
+ \r
+ }\r
+ \r
+ public void parse(File file, ILogger logger) throws Exception {\r
+ this.logger = logger;\r
+ SAXParserFactory spf = SAXParserFactory.newInstance();\r
+ SAXParser saxParser = spf.newSAXParser();\r
+ \r
+ XMLReader reader = saxParser.getXMLReader();\r
+ reader.setContentHandler(this);\r
+ reader.parse(new InputSource(new BufferedInputStream(new FileInputStream(file))));\r
+ done();\r
+ }\r
+ \r
+ \r
+}
\ No newline at end of file
Code Review / simantics / interop.git / blobdiff