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