X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.modeling%2Fsrc%2Forg%2Fsimantics%2Fmodeling%2Fscl%2Fontologymodule%2FGraphRelation.java;fp=bundles%2Forg.simantics.modeling%2Fsrc%2Forg%2Fsimantics%2Fmodeling%2Fscl%2Fontologymodule%2FGraphRelation.java;h=5a4598ce3bc98773a050954fdaac31a20cf11a57;hb=6320ecb3f75e3a29ed620ca5425ca22ef88a5496;hp=0000000000000000000000000000000000000000;hpb=6d789e04560b01a1845d39f7e951230bb74d6470;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.modeling/src/org/simantics/modeling/scl/ontologymodule/GraphRelation.java b/bundles/org.simantics.modeling/src/org/simantics/modeling/scl/ontologymodule/GraphRelation.java
new file mode 100644
index 000000000..5a4598ce3
--- /dev/null
+++ b/bundles/org.simantics.modeling/src/org/simantics/modeling/scl/ontologymodule/GraphRelation.java
@@ -0,0 +1,196 @@
+package org.simantics.modeling.scl.ontologymodule;
+
+import org.simantics.db.Resource;
+import org.simantics.scl.compiler.common.names.Name;
+import org.simantics.scl.compiler.compilation.CompilationContext;
+import org.simantics.scl.compiler.elaboration.chr.plan.PlanContext;
+import org.simantics.scl.compiler.elaboration.expressions.EApply;
+import org.simantics.scl.compiler.elaboration.expressions.EExternalConstant;
+import org.simantics.scl.compiler.elaboration.expressions.EVariable;
+import org.simantics.scl.compiler.elaboration.expressions.Expression;
+import org.simantics.scl.compiler.elaboration.expressions.Variable;
+import org.simantics.scl.compiler.elaboration.query.compilation.EnforcingContext;
+import org.simantics.scl.compiler.elaboration.query.compilation.QueryCompilationContext;
+import org.simantics.scl.compiler.elaboration.relations.SCLRelation;
+import org.simantics.scl.compiler.errors.Locations;
+import org.simantics.scl.compiler.internal.codegen.writer.CodeWriter;
+import org.simantics.scl.compiler.types.TVar;
+import org.simantics.scl.compiler.types.Type;
+import org.simantics.scl.compiler.types.Types;
+
+public class GraphRelation implements SCLRelation {
+
+    Resource relation;
+    double relationSelectivity;
+    Resource inverseRelation;
+    double inverseRelationSelectivity;
+    
+    public GraphRelation(Resource relation, double relationSelectivity,
+            Resource inverseRelation, double inverseRelationSelectivity) {
+        this.relation = relation;
+        this.relationSelectivity = relationSelectivity;
+        this.inverseRelation = inverseRelation;
+        this.inverseRelationSelectivity = inverseRelationSelectivity;
+    }
+
+    @Override
+    public TVar[] getTypeVariables() {
+        return TVar.EMPTY_ARRAY;
+    }
+    
+    private static final Type[] PARAMETER_TYPES = new Type[] { Types.RESOURCE, Types.RESOURCE };
+    
+    @Override
+    public Type[] getParameterTypes() {
+        return PARAMETER_TYPES;
+    }
+
+    @Override
+    public double getSelectivity(int boundVariables) {
+        switch(boundVariables) {
+        case FF: return Double.POSITIVE_INFINITY;
+        case BF: return relationSelectivity;
+        case FB: return inverseRelation == null ? Double.POSITIVE_INFINITY : inverseRelationSelectivity;
+        case BB: return 0.1;
+        default: throw new IllegalArgumentException();
+        }
+    }
+    
+    @Override
+    public int getRequiredVariablesMask() {
+        return inverseRelation == null ? BF : FF;
+    }
+    
+    private static final Name GET_OBJECTS = Name.create("Simantics/DB", "#");
+    private static final Name HAS_STATEMENT = Name.create("Simantics/DB", "existsStatement3");
+    
+    @Override
+    public void generate(long location, QueryCompilationContext context,
+            Type[] typeParameters, Variable[] parameters, int boundVariables) {
+        switch(boundVariables) {
+        case BF: 
+            context.iterateList(parameters[1], new EApply(
+                    Locations.NO_LOCATION,
+                    Types.READ_GRAPH,
+                    context.getCompilationContext().getConstant(GET_OBJECTS),
+                    new EVariable(parameters[0]),
+                    new EExternalConstant(relation, Types.RESOURCE)
+                    ));
+            break;
+        case FB:
+            if(inverseRelation == null)
+                throw new IllegalArgumentException();
+            context.iterateList(parameters[0], new EApply(
+                    Locations.NO_LOCATION,
+                    Types.READ_GRAPH,
+                    context.getCompilationContext().getConstant(GET_OBJECTS),
+                    new EVariable(parameters[1]),
+                    new EExternalConstant(inverseRelation, Types.RESOURCE)
+                    ));
+            break;
+        case BB:
+            context.condition(
+                    inverseRelation == null || relationSelectivity <= inverseRelationSelectivity
+                    ? new EApply(
+                            Locations.NO_LOCATION,
+                            Types.READ_GRAPH,
+                            context.getCompilationContext().getConstant(HAS_STATEMENT),
+                            new Expression[] {
+                                new EVariable(parameters[0]),
+                                new EExternalConstant(relation, Types.RESOURCE),
+                                new EVariable(parameters[1])
+                            }
+                            )
+                    : new EApply(
+                            Locations.NO_LOCATION,
+                            Types.READ_GRAPH,
+                            context.getCompilationContext().getConstant(HAS_STATEMENT),
+                            new Expression[] {
+                                new EVariable(parameters[1]),
+                                new EExternalConstant(inverseRelation, Types.RESOURCE),
+                                new EVariable(parameters[0])
+                            }
+                            ));
+            break;
+        default: throw new IllegalArgumentException();
+        }
+    }
+
+    private static final Name CLAIM = Name.create("Simantics/DB", "claim");
+    
+    @Override
+    public Expression generateEnforce(long location, EnforcingContext context,
+            Type[] typeParameters, Variable[] parameters) {
+        return new EApply(
+                Locations.NO_LOCATION,
+                Types.WRITE_GRAPH,
+                context.getCompilationContext().getConstant(CLAIM),
+                new EVariable(parameters[0]),
+                new EExternalConstant(relation, Types.RESOURCE),
+                new EVariable(parameters[1])
+                );
+    }
+
+    @Override
+    public int getPhase() {
+        return 0;
+    }
+
+    @Override
+    public void generateIterate(PlanContext context, CodeWriter w, long location, int boundMask, Variable[] variables,
+            Expression[] expressions, Expression[] typeConstraintEvidenceParameters) {
+        CompilationContext compilationContext = context.context;
+        switch(boundMask) {
+        case BF:
+            context.iterateList(location, w, variables[1],
+                    w.apply(location,
+                            compilationContext.environment.getValue(GET_OBJECTS).getValue(),
+                            expressions[0].toVal(compilationContext, w),
+                            w.getModuleWriter().getExternalConstant(relation, Types.RESOURCE)));
+            break;
+        case FB:
+            if(inverseRelation == null)
+                throw new IllegalArgumentException();
+            context.iterateList(location, w, variables[0],
+                    w.apply(location,
+                            compilationContext.environment.getValue(GET_OBJECTS).getValue(),
+                            expressions[1].toVal(compilationContext, w),
+                            w.getModuleWriter().getExternalConstant(inverseRelation, Types.RESOURCE)));
+            break;
+        case BB:
+            context.check(location, w, 
+                    inverseRelation == null || relationSelectivity <= inverseRelationSelectivity
+                    ? w.apply(location, compilationContext.environment.getValue(HAS_STATEMENT).getValue(), 
+                            expressions[0].toVal(compilationContext, w),
+                            w.getModuleWriter().getExternalConstant(relation, Types.RESOURCE),
+                            expressions[1].toVal(compilationContext, w))
+                    : w.apply(location, compilationContext.environment.getValue(HAS_STATEMENT).getValue(), 
+                            expressions[1].toVal(compilationContext, w),
+                            w.getModuleWriter().getExternalConstant(inverseRelation, Types.RESOURCE),
+                            expressions[0].toVal(compilationContext, w)));
+            break;
+        default: throw new IllegalArgumentException();
+        }
+    }
+
+    @Override
+    public void generateEnforce(PlanContext context, CodeWriter w, long location, Expression[] parameters,
+            Expression[] typeConstraintEvidenceParameters) {
+        CompilationContext compilationContext = context.context;
+        w.apply(location,
+                compilationContext.environment.getValue(CLAIM).getValue(),
+                parameters[0].toVal(compilationContext, w),
+                w.getModuleWriter().getExternalConstant(relation, Types.RESOURCE),
+                parameters[1].toVal(compilationContext, w));
+    }
+    
+    @Override
+    public Type getEnforceEffect() {
+        return Types.WRITE_GRAPH;
+    }
+
+    @Override
+    public Type getQueryEffect() {
+        return Types.READ_GRAPH;
+    }
+}