bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/SCLValueAccessor.java

   1 package org.simantics.db.layer0.variable;
   2
   3 import org.simantics.databoard.binding.Binding;
   4 import org.simantics.databoard.type.Datatype;
   5 import org.simantics.db.ReadGraph;
   6 import org.simantics.db.WriteGraph;
   7 import org.simantics.db.exception.DatabaseException;
   8 import org.simantics.scl.runtime.SCLContext;
   9 import org.simantics.scl.runtime.function.Function1;
  10 import org.simantics.scl.runtime.function.Function2;
  11 import org.simantics.scl.runtime.function.Function3;
  12
  13 public class SCLValueAccessor implements ValueAccessor {
  14
  15         private final Function1<Variable,Object> getValue1;
  16         private final Function2<Variable,Binding,Object> getValue2;
  17         private final Function2<Variable,Object,Object> setValue2;
  18         private final Function3<Variable,Object,Binding,Object> setValue3;
  19         private final Function1<Variable,Datatype> getDatatype;
  20
  21         public SCLValueAccessor(Function1<Variable, Object> getValue1, Function2<Variable, Binding, Object> getValue2,
  22                         Function2<Variable, Object, Object> setValue2, Function3<Variable, Object, Binding, Object> setValue3,
  23                         Function1<Variable, Datatype> getDatatype) {
  24                 this.getValue1 = getValue1;
  25                 this.getValue2 = getValue2;
  26                 this.setValue2 = setValue2;
  27                 this.setValue3 = setValue3;
  28                 this.getDatatype = getDatatype;
  29         }
  30
  31         @Override
  32         public Object getValue(ReadGraph graph, Variable context) throws DatabaseException {
  33         SCLContext sclContext = SCLContext.getCurrent();
  34         Object oldGraph = sclContext.put("graph", graph);
  35         try {
  36             return getValue1.apply(context);
  37         } catch (Throwable t) {
  38             throw new DatabaseException(t);
  39         } finally {
  40             sclContext.put("graph", oldGraph);
  41         }
  42         }
  43
  44         @Override
  45         public Object getValue(ReadGraph graph, Variable context, Binding binding) throws DatabaseException {
  46         SCLContext sclContext = SCLContext.getCurrent();
  47         Object oldGraph = sclContext.put("graph", graph);
  48         try {
  49             return getValue2.apply(context, binding);
  50         } catch (Throwable t) {
  51             throw new DatabaseException(t);
  52         } finally {
  53             sclContext.put("graph", oldGraph);
  54         }
  55         }
  56
  57         @Override
  58         public void setValue(WriteGraph graph, Variable context, Object value) throws DatabaseException {
  59         SCLContext sclContext = SCLContext.getCurrent();
  60         Object oldGraph = sclContext.put("graph", graph);
  61         try {
  62             setValue2.apply(context, value);
  63         } catch (Throwable t) {
  64             throw new DatabaseException(t);
  65         } finally {
  66             sclContext.put("graph", oldGraph);
  67         }
  68         }
  69
  70         @Override
  71         public void setValue(WriteGraph graph, Variable context, Object value, Binding binding) throws DatabaseException {
  72         SCLContext sclContext = SCLContext.getCurrent();
  73         Object oldGraph = sclContext.put("graph", graph);
  74         try {
  75             setValue3.apply(context, value, binding);
  76         } catch (Throwable t) {
  77             throw new DatabaseException(t);
  78         } finally {
  79             sclContext.put("graph", oldGraph);
  80         }
  81         }
  82
  83         @Override
  84         public Datatype getDatatype(ReadGraph graph, Variable context) throws DatabaseException {
  85         SCLContext sclContext = SCLContext.getCurrent();
  86         Object oldGraph = sclContext.put("graph", graph);
  87         try {
  88             return getDatatype.apply(context);
  89         } catch (Throwable t) {
  90             throw new DatabaseException(t);
  91         } finally {
  92             sclContext.put("graph", oldGraph);
  93         }
  94         }
  95
  96 }