bundles/org.simantics.document.linking.ui/src/org/simantics/document/linking/report/evaluator/If.java

   1 package org.simantics.document.linking.report.evaluator;
   2
   3 import java.util.Collections;
   4 import java.util.List;
   5 import java.util.Map;
   6
   7 import org.eclipse.jface.resource.ImageDescriptor;
   8 import org.simantics.db.ReadGraph;
   9 import org.simantics.db.exception.DatabaseException;
  10 import org.simantics.db.layer0.variable.Variable;
  11 import org.simantics.document.linking.Activator;
  12 import org.simantics.document.linking.ontology.DocumentLink;
  13 import org.simantics.document.linking.report.DocumentLine;
  14 import org.simantics.objmap.graph.annotations.OrderedSetType;
  15
  16 /**
  17  * Checks that the first size does not return null or "false".
  18  * Depending on results evaluates the second child or the third (if it exists).
  19  *
  20  * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
  21  *
  22  */
  23 @OrderedSetType(DocumentLink.URIs.EvaluatorTree_If)
  24 public class If extends EvaluatorNode{
  25
  26         @Override
  27         public String getValue(ReadGraph graph, Variable variable, Map<Object, Object> context) throws DatabaseException {
  28                 if (children.size() > 3)
  29                         throw new DatabaseException("If node has more than 3 children.");
  30
  31                 String ifVal = children.get(0).getValue(graph, variable, context);
  32                 if (ifVal != null && ifVal.length() > 0 && !Boolean.FALSE.toString().equals(ifVal)) {
  33                         return children.get(1).getValue(graph, variable, context);
  34                 } else if (children.size() == 3) {
  35                         return children.get(2).getValue(graph, variable, context);
  36                 }
  37                 return null;
  38         }
  39
  40         @Override
  41         public List<DocumentLine> getLines(ReadGraph graph,     Variable variable, Map<Object, Object> context) throws DatabaseException {
  42                 if (children.size() > 3)
  43                         throw new DatabaseException("If node has more than 3 children.");
  44                 String ifVal = children.get(0).getValue(graph, variable, context);
  45                 if (ifVal != null && ifVal.length() > 0 && !Boolean.FALSE.toString().equals(ifVal)) {
  46                         return children.get(1).getLines(graph, variable, context);
  47                 } else if (children.size() == 3) {
  48                         return children.get(2).getLines(graph, variable, context);
  49                 }
  50                 return Collections.emptyList();
  51         }
  52
  53
  54         @Override
  55         public String toString() {
  56                 return "if";
  57         }
  58
  59         @Override
  60         public List<Class<? extends EvaluatorItem>> getPossibleChildren(boolean add) {
  61                 if (add && children.size() == 3)
  62                         return Collections.emptyList();
  63                 return super.getPossibleChildren(add);
  64         }
  65
  66         @Override
  67         public EvaluatorItem copy() {
  68                 If node = new If();
  69                 copyChildren(node);
  70                 return node;
  71
  72         }
  73
  74         @Override
  75         public ImageDescriptor getImage() {
  76                 return Activator.imageDescriptorFromPlugin("com.famfamfam.silk", "icons/help.png");
  77         }
  78
  79         @Override
  80         public boolean acceptChild(EvaluatorItem item) {
  81                 return children.size() < 3;
  82         }
  83
  84         @Override
  85         public boolean acceptChild(int index, EvaluatorItem item) {
  86                 return children.size() < 3;
  87         }
  88
  89 }