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.chr.relations.SpecialCHRRelation;
   8 import org.simantics.scl.compiler.elaboration.contexts.SimplificationContext;
   9 import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
  10 import org.simantics.scl.compiler.elaboration.contexts.TypingContext;
  11 import org.simantics.scl.compiler.elaboration.expressions.Expression;
  12 import org.simantics.scl.compiler.elaboration.expressions.Variable;
  13 import org.simantics.scl.compiler.elaboration.expressions.printing.ExpressionToStringVisitor;
  14 import org.simantics.scl.compiler.errors.Locations;
  15 import org.simantics.scl.compiler.internal.parsing.Symbol;
  16 import org.simantics.scl.compiler.types.Type;
  17
  18 import gnu.trove.map.hash.TObjectIntHashMap;
  19 import gnu.trove.set.hash.THashSet;
  20 import gnu.trove.set.hash.TIntHashSet;
  21
  22 public class CHRQuery extends Symbol {
  23     public CHRLiteral[] literals;
  24
  25     public CHRQuery(CHRLiteral[] literals) {
  26         this.literals = literals;
  27     }
  28
  29     public void resolve(TranslationContext context) {
  30         for(CHRLiteral literal : literals)
  31             literal.resolve(context);
  32     }
  33
  34     public void checkType(TypingContext context) {
  35         for(CHRLiteral literal : literals)
  36             literal.checkType(context);
  37     }
  38
  39     public void collectVars(TObjectIntHashMap<Variable> allVars, TIntHashSet vars) {
  40         for(CHRLiteral literal : literals)
  41             literal.collectVars(allVars, vars);
  42     }
  43
  44     public void collectFreeVariables(THashSet<Variable> vars) {
  45         for(CHRLiteral literal : literals)
  46             literal.collectFreeVariables(vars);
  47         for(CHRLiteral literal : literals)
  48             if(literal.relation == SpecialCHRRelation.ASSIGN)
  49                 literal.parameters[0].removeFreeVariables(vars);
  50     }
  51
  52     public void setLocationDeep(long loc) {
  53         if(location == Locations.NO_LOCATION) {
  54             this.location = loc;
  55             for(CHRLiteral literal : literals)
  56                 literal.setLocationDeep(loc);
  57         }
  58     }
  59
  60     public boolean createQueryPlan(QueryPlanningContext context, Expression inputFact, int activeLiteralId, CHRConstraint initConstraint) {
  61         for(int i=0;i<literals.length;++i) {
  62             CHRLiteral literal = literals[i];
  63             if(i == activeLiteralId)
  64                 context.activate(literal, inputFact, i);
  65             else
  66                 context.add(literal, i);
  67         }
  68         if(activeLiteralId == -1 && inputFact != null) {
  69             context.addInitFact(initConstraint, inputFact);
  70         }
  71         return context.createQueryPlan();
  72     }
  73
  74     public void simplify(SimplificationContext context) {
  75         for(CHRLiteral literal : literals)
  76             literal.simplify(context);
  77     }
  78
  79     public void createEnforcePlan(QueryPlanningContext context, int priority) {
  80         context.addPlanOp(new PreCommitOp(location));
  81         for(CHRLiteral literal : literals)
  82             context.claim(context, literal);
  83         context.addPlanOp(new PostCommitOp(location, priority));
  84     }
  85
  86     public String toString() {
  87         StringBuilder b = new StringBuilder();
  88         ExpressionToStringVisitor visitor = new ExpressionToStringVisitor(b);
  89         visitor.visit(this);
  90         return b.toString();
  91     }
  92
  93     public void collectQueryEffects(THashSet<Type> effects) {
  94         for(CHRLiteral literal : literals)
  95             literal.collectQueryEffects(effects);
  96     }
  97
  98     public void collectEnforceEffects(THashSet<Type> effects) {
  99         for(CHRLiteral literal : literals)
 100             literal.collectEnforceEffects(effects);
 101     }
 102 }