bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/chr/CHRQuery.java

   1 package org.simantics.scl.compiler.elaboration.chr;
   2
   3 import org.simantics.scl.compiler.elaboration.chr.plan.PostCommitOp;
   4 import org.simantics.scl.compiler.elaboration.chr.plan.PreCommitOp;
   5 import org.simantics.scl.compiler.elaboration.chr.planning.QueryPlanningContext;
   6 import org.simantics.scl.compiler.elaboration.chr.relations.CHRConstraint;
   7 import org.simantics.scl.compiler.elaboration.contexts.SimplificationContext;
   8 import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
   9 import org.simantics.scl.compiler.elaboration.contexts.TypingContext;
  10 import org.simantics.scl.compiler.elaboration.expressions.Expression;
  11 import org.simantics.scl.compiler.elaboration.expressions.Variable;
  12 import org.simantics.scl.compiler.elaboration.expressions.printing.ExpressionToStringVisitor;
  13 import org.simantics.scl.compiler.errors.Locations;
  14 import org.simantics.scl.compiler.internal.parsing.Symbol;
  15 import org.simantics.scl.compiler.types.Type;
  16
  17 import gnu.trove.map.hash.TObjectIntHashMap;
  18 import gnu.trove.set.hash.THashSet;
  19 import gnu.trove.set.hash.TIntHashSet;
  20
  21 public class CHRQuery extends Symbol {
  22     public CHRLiteral[] literals;
  23
  24     public CHRQuery(CHRLiteral[] literals) {
  25         this.literals = literals;
  26     }
  27
  28     public void resolve(TranslationContext context) {
  29         for(CHRLiteral literal : literals)
  30             literal.resolve(context);
  31     }
  32
  33     public void checkType(TypingContext context) {
  34         for(CHRLiteral literal : literals)
  35             literal.checkType(context);
  36     }
  37
  38     public void collectVars(TObjectIntHashMap<Variable> allVars, TIntHashSet vars) {
  39         for(CHRLiteral literal : literals)
  40             literal.collectVars(allVars, vars);
  41     }
  42
  43     public void setLocationDeep(long loc) {
  44         if(location == Locations.NO_LOCATION) {
  45             this.location = loc;
  46             for(CHRLiteral literal : literals)
  47                 literal.setLocationDeep(loc);
  48         }
  49     }
  50
  51     public boolean createQueryPlan(QueryPlanningContext context, Expression inputFact, int activeLiteralId, CHRConstraint initConstraint) {
  52         for(int i=0;i<literals.length;++i) {
  53             CHRLiteral literal = literals[i];
  54             if(i == activeLiteralId)
  55                 context.activate(literal, inputFact, i);
  56             else
  57                 context.add(literal, i);
  58         }
  59         if(activeLiteralId == -1 && inputFact != null) {
  60             context.addInitFact(initConstraint, inputFact);
  61         }
  62         return context.createQueryPlan();
  63     }
  64
  65     public void simplify(SimplificationContext context) {
  66         for(CHRLiteral literal : literals)
  67             literal.simplify(context);
  68     }
  69
  70     public void createEnforcePlan(QueryPlanningContext context, int priority) {
  71         context.addPlanOp(new PreCommitOp(location));
  72         for(CHRLiteral literal : literals)
  73             context.claim(context, literal);
  74         context.addPlanOp(new PostCommitOp(location, priority));
  75     }
  76
  77     public String toString() {
  78         StringBuilder b = new StringBuilder();
  79         ExpressionToStringVisitor visitor = new ExpressionToStringVisitor(b);
  80         visitor.visit(this);
  81         return b.toString();
  82     }
  83
  84     public void collectQueryEffects(THashSet<Type> effects) {
  85         for(CHRLiteral literal : literals)
  86             literal.collectQueryEffects(effects);
  87     }
  88
  89     public void collectEnforceEffects(THashSet<Type> effects) {
  90         for(CHRLiteral literal : literals)
  91             literal.collectEnforceEffects(effects);
  92     }
  93 }