bundles/org.simantics.structural2/src/org/simantics/structural2/scl/AbstractCompileStructuralValueRequest.java

   1 package org.simantics.structural2.scl;
   2
   3 import java.util.Collections;
   4 import java.util.Map;
   5
   6 import org.simantics.databoard.Bindings;
   7 import org.simantics.db.ReadGraph;
   8 import org.simantics.db.Resource;
   9 import org.simantics.db.common.procedure.adapter.TransientCacheListener;
  10 import org.simantics.db.common.request.ResourceRead2;
  11 import org.simantics.db.exception.DatabaseException;
  12 import org.simantics.db.layer0.scl.AbstractExpressionCompilationContext;
  13 import org.simantics.db.layer0.scl.AbstractExpressionCompilationRequest;
  14 import org.simantics.db.layer0.util.RuntimeEnvironmentRequest;
  15 import org.simantics.db.layer0.util.RuntimeEnvironmentRequest2;
  16 import org.simantics.db.layer0.variable.Variable;
  17 import org.simantics.layer0.Layer0;
  18 import org.simantics.scl.compiler.elaboration.expressions.EApply;
  19 import org.simantics.scl.compiler.elaboration.expressions.EConstant;
  20 import org.simantics.scl.compiler.elaboration.expressions.EVariable;
  21 import org.simantics.scl.compiler.elaboration.expressions.Expression;
  22 import org.simantics.scl.compiler.elaboration.modules.SCLValue;
  23 import org.simantics.scl.compiler.environment.Environment;
  24 import org.simantics.scl.compiler.environment.Environments;
  25 import org.simantics.scl.compiler.runtime.RuntimeEnvironment;
  26 import org.simantics.scl.compiler.top.SCLExpressionCompilationException;
  27 import org.simantics.scl.compiler.types.Type;
  28 import org.simantics.structural2.scl.AbstractCompileStructuralValueRequest.CompilationContext;
  29
  30 /**
  31  * Compiles an SCL expression that is attached to a literal
  32  * whose parent is a component that is a part of a component type.
  33  *
  34  * @author Antti Villberg
  35  */
  36 abstract public class AbstractCompileStructuralValueRequest extends AbstractExpressionCompilationRequest<CompilationContext, Variable> {
  37
  38     protected final Resource relation;
  39
  40     public static class CompilationContext extends AbstractExpressionCompilationContext {
  41         public final Map<String, ComponentTypeProperty> propertyMap;
  42
  43         public CompilationContext(RuntimeEnvironment runtimeEnvironment,
  44                 Map<String, ComponentTypeProperty> propertyMap) {
  45             super(runtimeEnvironment);
  46             this.propertyMap = propertyMap;
  47         }
  48     }
  49
  50     public AbstractCompileStructuralValueRequest(Resource relation) {
  51         this.relation = relation;
  52     }
  53
  54     @Override
  55     abstract protected String getExpressionText(ReadGraph graph) throws DatabaseException;
  56     abstract protected Resource getIndexRoot(ReadGraph graph) throws DatabaseException;
  57     abstract protected Resource getComponentType(ReadGraph graph) throws DatabaseException;
  58
  59     @Override
  60     protected Type getExpectedType(ReadGraph graph, CompilationContext context)
  61             throws DatabaseException {
  62         Layer0 L0 = Layer0.getInstance(graph);
  63         String valueType = graph.getPossibleRelatedValue(relation, L0.RequiresValueType, Bindings.STRING);
  64         if(valueType != null) {
  65             try {
  66                 return Environments.getType(context.runtimeEnvironment.getEnvironment(), valueType);
  67             } catch (SCLExpressionCompilationException e) {
  68                 e.printStackTrace();
  69             }
  70         }
  71         return super.getExpectedType(graph, context);
  72     }
  73
  74
  75
  76     @Override
  77     protected CompilationContext getCompilationContext(ReadGraph graph)
  78             throws DatabaseException {
  79         Resource indexRoot = getIndexRoot(graph);
  80         Resource componentType = getComponentType(graph);
  81         if(componentType == null) {
  82             RuntimeEnvironment runtimeEnvironment = graph.syncRequest(new RuntimeEnvironmentRequest(indexRoot));
  83             return new CompilationContext(runtimeEnvironment, Collections.<String,ComponentTypeProperty>emptyMap());
  84         } else {
  85                 return graph.syncRequest(new ResourceRead2<CompilationContext>(componentType, indexRoot) {
  86                     @Override
  87                     public CompilationContext perform(ReadGraph graph)
  88                             throws DatabaseException {
  89                         RuntimeEnvironment runtimeEnvironment = graph.syncRequest(new RuntimeEnvironmentRequest2(resource, resource2));
  90                         Map<String, ComponentTypeProperty> propertyMap =
  91                                 graph.syncRequest(new ReadComponentTypeInterfaceRequest(resource, runtimeEnvironment.getEnvironment()),
  92                                         TransientCacheListener.<Map<String, ComponentTypeProperty>>instance());
  93                         return new CompilationContext(runtimeEnvironment, propertyMap);
  94                     }
  95                 });
  96         }
  97     }
  98
  99     @Override
 100     protected Type getContextVariableType() {
 101         return VARIABLE;
 102     }
 103
 104     protected static Expression accessInputVariable(Environment environment,
 105             org.simantics.scl.compiler.elaboration.expressions.Variable contextVariable) {
 106         SCLValue variableParentFunction = environment.getValue(VARIABLE_PARENT);
 107         return new EApply(new EConstant(variableParentFunction),
 108                 new EApply(new EConstant(variableParentFunction),
 109                         new EVariable(contextVariable)));
 110     }
 111
 112     @Override
 113     protected Expression getVariableAccessExpression(
 114             ReadGraph graph,
 115             CompilationContext context,
 116             org.simantics.scl.compiler.elaboration.expressions.Variable contextVariable,
 117             String name) throws DatabaseException {
 118         ComponentTypeProperty property = context.propertyMap.get(name);
 119         if(property != null) {
 120             Environment environment = context.runtimeEnvironment.getEnvironment();
 121             return getPropertyFlexible(environment,
 122                     accessInputVariable(environment, contextVariable),
 123                     name,
 124                     property.type);
 125         }
 126         else if(name.equals("input")) {
 127             Environment environment = context.runtimeEnvironment.getEnvironment();
 128             return accessInputVariable(environment, contextVariable);
 129         }
 130         else if(name.equals("self"))
 131             return new EVariable(contextVariable);
 132         else
 133             return null;
 134     }
 135
 136 }