org.simantics.xml.sax.base/src/org/simantics/xml/sax/base/XMLElementNamedChildWriterBase.java

   1 package org.simantics.xml.sax.base;\r
   2 \r
   3 import java.util.HashMap;\r
   4 import java.util.HashSet;\r
   5 import java.util.Map;\r
   6 import java.util.Set;\r
   7 \r
   8 import javax.xml.stream.XMLStreamException;\r
   9 import javax.xml.stream.XMLStreamWriter;\r
  10 \r
  11 import org.simantics.db.ReadGraph;\r
  12 import org.simantics.db.Resource;\r
  13 import org.simantics.db.exception.DatabaseException;\r
  14 \r
  15 public abstract class XMLElementNamedChildWriterBase implements XMLElementNamedChildWriter{\r
  16 \r
  17         private Map<Resource,Class<? extends XMLElementWriter>> typeWriters = new HashMap<Resource, Class<? extends XMLElementWriter>>();\r
  18         private Map<Resource,Class<? extends XMLElementWriter>> relationWriters = new HashMap<Resource, Class<? extends XMLElementWriter>>();\r
  19         private Set<Class<? extends XMLElementWriter>> writers = new HashSet<Class<? extends XMLElementWriter>>();\r
  20         \r
  21         \r
  22         public XMLElementNamedChildWriterBase() {\r
  23         \r
  24         }\r
  25         \r
  26         public XMLElementNamedChildWriterBase(ReadGraph graph) {\r
  27                 \r
  28         }\r
  29         \r
  30         @Override\r
  31         public Resource getType(ReadGraph graph) throws DatabaseException {\r
  32                 return null;\r
  33         }\r
  34         \r
  35         @Override\r
  36         public void start(ReadGraph graph, WriterElement instance, XMLStreamWriter writer) throws XMLStreamException {\r
  37                 writer.writeStartElement(getElementId());\r
  38         }\r
  39         \r
  40         @Override\r
  41         public void characters(ReadGraph graph, WriterElement instance, XMLStreamWriter writer)\r
  42                         throws XMLStreamException, DatabaseException {\r
  43                 \r
  44         }\r
  45         \r
  46         @Override\r
  47         public void end(ReadGraph graph, WriterElement instance, XMLStreamWriter writer) throws XMLStreamException {\r
  48                 writer.writeEndElement();\r
  49         }\r
  50         \r
  51         @Override\r
  52         public void children(ReadGraph graph, WriterElement instance, Set<Resource> sorted)\r
  53                         throws XMLStreamException, DatabaseException {\r
  54         \r
  55         }\r
  56         \r
  57         @Override\r
  58         public Class<? extends XMLElementWriter> getWriter(ReadGraph graph, Map<Resource, XMLElementWriter> writers, WriterElement child) throws DatabaseException{\r
  59                 Resource type = graph.getSingleType(child.instance);\r
  60                 Class<? extends XMLElementWriter> writerClass =  typeWriters.get(type);\r
  61                 if (writerClass != null)\r
  62                         return writerClass;\r
  63                 if (child.statement != null) {\r
  64                         writerClass = relationWriters.get(child.statement.getPredicate());\r
  65                         if (writerClass != null)\r
  66                                 return writerClass;\r
  67                 }\r
  68                 XMLElementWriter writer = writers.get(type);\r
  69                 if (writer == null)\r
  70                         return null;\r
  71                 writerClass = writer.getClass();\r
  72                 if (this.writers.contains(writerClass))\r
  73                         return writerClass;\r
  74                 for (Class<?> c : this.writers)\r
  75                         if (c.isAssignableFrom(writerClass))\r
  76                                 return writerClass;\r
  77                 return null;\r
  78         }\r
  79         \r
  80         public void addTypeWriter(Resource type, Class<? extends XMLElementWriter> writer) {\r
  81                 typeWriters.put(type, writer);\r
  82         }\r
  83         \r
  84         public void addRelationWriter(Resource relation, Class<? extends XMLElementWriter> writer) {\r
  85                 relationWriters.put(relation, writer);\r
  86         }\r
  87         \r
  88         public void addWriter(Class<? extends XMLElementWriter> writer) {\r
  89                 writers.add(writer);\r
  90         }\r
  91 }\r