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acg QVTR startsWith RelationalTransformation {

  attribute EObject::location = self.__xmiID__;
		
  attribute EObject::_debug = true;

  --*****************************************************************************************
  
  function EObject::pattern() =
    if self isa Pattern then self
    else
      let container = self.eContainer() in
        if container.oclIsUndefined() then OclUndefined
        else container.pattern()
        endif
    endif
    ;
    
  function EObject::relation() =
    if self isa Relation then self
    else
      let container = self.eContainer() in
        if container.oclIsUndefined() then OclUndefined
        else container.relation()
        endif
    endif
    ;
    
  function EObject::domain() =
    if self isa Domain then self
    else
      let container = self.eContainer() in
        if container.oclIsUndefined() then OclUndefined
        else container.domain()
        endif
    endif
    ;
    
  function EObject::context_provider() =   
    let container = self.eContainer() in
    if container isa Predicate then self
    else
      if container isa TemplateExp or container isa PropertyTemplateItem or container isa Function or container isa RelationDomainAssignment then container
      else
        if container.oclIsUndefined() then OclUndefined
        else container.context_provider()
        endif
      endif
    endif
    ;

  ObjectTemplateExp mode class {
    push self.bindsTo.eType.name
    push self.pattern().eContainer().typedModel.name+'MM'
    findme
  }

  CollectionTemplateExp mode class {
    push 'OclParametrizedType'
	push '#native'
	new
	dup
	push self.referedCollectionType.name
	call 'J.setName(S):V'
	dup
	push 'OclSimpleType'
	push '#native'
	new
	dup
	push 'OclAny'
	call 'J.setName(S):V'
	call 'J.setElementType(J):V'
  }
  
  asm RelationalTransformation name self.name {
    
    field 'relationCalls' : 'Nmap;'
    field 'relationResults' : 'Nmap;'
    
    operation context 'A' name 'main' {
      param 'enforce' : 'S'
            
      getasm
      push 'Map'
      push '#native'
      new
      foreach (r in self.rule->select(r | r.isTopLevel)) {
        push r.name
        pushf
        call 'NMap;.including(SJ):Nmap;'
      }
      set 'relationCalls'
      
      getasm
      push 'Map'
      push '#native'
      new
      set 'relationResults'
      
      load 'enforce'
      push 'true'
      call 'J.=(J):B'
      variable self named 'enforce' {
      
        pusht      
        foreach (r in self.rule->select(r | r.isTopLevel)) {
          getasm
          load self
          call 'A.'+r.name+'(B):B'
          call 'B.and(B):B'
        }
        
      }
      push 'Transformation result is'
      call 'J.debug(S):J'
    }
    
    foreach (r in self.rule) {
      analyze r
    }
    
    foreach (o in self.eOperations) {
      analyze o
    }
  }
  
  function Relation::source_patterns() =
    if self.when.oclIsUndefined() then
      Sequence{}
    else
      Sequence{self.when}
    endif.union(
      self.domain.asSequence().excluding(self.direction_domain())
        ->select(d | not d.pattern.oclIsUndefined())
        ->collect(d | d.pattern)
    )
    ;
    
  function Relation::target_patterns() =
    self.direction_domain().pattern.asSequence().including(
      if self.where.oclIsUndefined() then
        Sequence{}
      else
        Sequence{self.where}
      endif
    )
    ;
    
  Function {
    operation context 'A' name self.name {
      foreach (p in self.eParameters) {
        param p.name : 'J'
      }
      analyze self mode pre_binding
      variable self named 'context' {
        analyze self.queryExpression
      }
    }
  }
  
  Function mode pre_binding {
    push 'Map'
    push '#native'
    new
    foreach (p in self.eParameters) {
      push p.name
      load p.name
      call 'NMap;.including(SJ):NMap;'
    }
  }
  
  Relation {
    operation context 'A' name self.name {
      param 'enforce' : 'B'
      
      if (not self.isTopLevel) {
        foreach (d in self.domain) {
          param d.rootVariable.name : 'J'
        }
        
        if (self._debug) {
          push ''
          foreach (d in self.domain.asSequence()) {
            load d.rootVariable.name
            call 'J.toString():S'
            call 'S.concat(S):S'
            if ( d <> self.domain.asSequence().last() ) {
              push ', '
              call 'S.concat(S):S'
            }
          }
          push self.name + ' called with arguments'
          call 'J.debug(S):J'
          pop
        }
      }
      
      if (self.isTopLevel) {
        getasm
        get 'relationCalls'
        push self.name
        call 'NMap;.get(S):J'
        if skip_execution
      
        getasm
        getasm
        get 'relationCalls'
        push self.name
        pusht
        call 'NMap;.including(SJ):NMap;'
        set 'relationCalls'
      }
      
      pusht
      variable self named self.name+'_result'{
        analyze self mode pre_binding							--NMap
        foreach (sp in self.source_patterns()) {
          analyze sp											--ENMap
          iterate												--NMap
            [
              dup												--NMap,NMap
              foreach(tp in self.target_patterns()) {
                analyze tp										--NMap,ENMap
                dup												--NMap,ENMap,ENMap
                call 'J.isEmpty():B'							--NMap,ENMap,B
                if warn_or_enforce								--NMap,ENMap
                iterate											--NMap,NMap
                  [
                    analyze self mode register
                    goto end_target
                  ]
                enditerate
              }
              warn_or_enforce:									--NMap,ENMap
                pop												--NMap
                variable self.direction_domain().pattern named 'target_context' {
                  foreach (rda in self.direction_domain().defaultAssignment){
                    load self.direction_domain().pattern
                    variable rda named 'defaultAssignmentContext' {
                      load rda
                      push rda.variable.name
                      analyze rda.valueExp
                      if (self._debug){	--S,J
                        swap			--J,S
                        dup_x1			--S,J,S
                        push ' default value '
                        call 'S.concat(S):S'
                        call 'J.debug(S):J'
                      }
                      call 'NMap;.including(SJ):NMap;'
                      store self.direction_domain().pattern
                    }
                  }
                  analyze self.direction_domain().pattern.templateExpression mode warn_or_enforce
               	}
               	end_target:
            ]
          enditerate          
        }
        if (self.isTopLevel) {
          getasm
          getasm
          get 'relationResults'
          push self.name
          load self
          call 'NMap;.including(SJ):NMap;'
          set 'relationResults'
          skip_execution:
            getasm
            get 'relationResults'
            push self.name
            call 'NMap;.get(S):J'
            goto end
        }
        load self
        if (self._debug) {
          push '-----------'+self.name + ' result'
          call 'J.debug(S):J'
        }
        end:
      }
    }
  }
  
  ObjectTemplateExp mode warn_or_enforce {				--
    load 'enforce'
    if enforce
      load self.pattern()
      push 'Missing an instance of '+self.referredClass.name + ' compliant with'
      call 'J.debug(S):J'
      pop
      goto end
    enforce:											
      analyze self mode force_bind_element
      load self.pattern()
      analyze self.relation() mode register
      
      if (not self.relation().where.oclIsUndefined()) {
        pusht												--B
        foreach (p in self.relation().where.predicate) {
          load self.pattern()								--B,NMap
          variable p.conditionExpression named 'context' {	--B
            analyze p.conditionExpression mode post_unify	--B,B
            call 'B.and(B):B'								--B
            load p.conditionExpression						--B,NMap
            store self.pattern()							--B
          }
        }
        if update
          load self.pattern()
          push 'failed enforcement of '+ self.bindsTo.name
          call 'J.debug(S):J'
          pop
          goto end
        update:
        analyze self mode update							--
      } else {
        analyze self mode update							--
      }
    end:
  }
  
  ObjectTemplateExp mode update {
    foreach (pti in self.part) {
      analyze pti mode update
    }
  }
  
  PropertyTemplateItem mode update {
    analyze self.objContainer
    load self.pattern()
    variable self named 'context' {
      analyze self.value
    }
    if (self._debug){		--J1,J2
      swap					--J2,J1
      dup_x1				--J1,J2,J1
      call 'J.toString():S' --J1,J2,S
      push '.'+self.referredProperty.name+' set to'
      call 'S.concat(S):S'
      call 'J.debug(S):J'
    }
    
	set self.referredProperty.name
	if (self.value isa TemplateExp) {
	  analyze self.value mode update
	}
  }
  
  CollectionTemplateExp mode update {
    load self.pattern()
    push self.bindsTo.name
	push self.referredCollectionType.name
    push '#native'
    new
    foreach (m in self.member) {
      analyze m
      call 'CJ.including(J):CJ'
    }
    load self.pattern()
    push self.rest.name
    call 'NMap;.get(S):J'
    call 'CJ.union(CJ):CJ'
    call 'NMap;.including(SJ):NMap;'
    store self.pattern()
  }
  
  TemplateExp {
    load self.pattern()		--only called by update mode ?
	push self.bindsTo.name
	call 'NMap;.get(S):J'
  }
  
  function Relation::objectTemplateExp() =
    self.domain
      ->collect(d | d.pattern)
      ->collect(p | p.templateExpression).flatten()
      ->select(t | t isa ObjectTemplateExp)
      ->collect(ote | ote.objectTemplateExp()).flatten()
  ;
  
  function ObjectTemplateExp::objectTemplateExp() =
    Sequence{self}.union(self.part->select(pti | pti.value isa ObjectTemplateExp)->collect(pti | pti.value.objectTemplateExp()).flatten())
  ;
  
  Relation mode register {  						--NMap
    variable self.direction_domain() named self.name+'_register_context' {
      push 'T'+self.name
      push 'Traceability'
      new
      push 'Trace created for '+self.name
      call 'J.debug(S):J'
      foreach (ote in self.objectTemplateExp()) {	--J
        dup											--J,J
        load self.direction_domain()				--J,J,NMap
        push ote.bindsTo.name						--J,J,NMap,S
        call 'NMap;.get(S):J'						--J,J,J
        set ote.bindsTo.name						--J
--        if (self._debug){
--          dup										--J,J
--          get ote.bindsTo.name						--J,J
--          push 'T'+self.name+'.'+ote.bindsTo.name+' set to'
--          call 'J.debug(S):J'
--          pop
--        }        
      }
      pop
    }
  }
  
  CollectionTemplateExp mode get_target_candidates {
    load self.pattern()							--NMap
    push self.bindsTo.name						--NMap,S
    call 'NMap;.get(S):J'						--J
    call 'J.oclIsUndefined()'					--B
    call 'B.not():B'							--B
    if found									--
      load self.pattern()						--NMap
      push self.bindsTo.name					--NMap,S
      push self.referredCollectionType.name		--NMap,S,S
      push '#native'							--NMap,S,S,S
      new										--NMap,S,CJ
      call 'NMap;.including(SJ):NMap;'			--NMap
      store self.pattern()						--
    found:										--
  }
  
  ObjectTemplateExp mode force_bind_element {
      load self.pattern()														--NMap
      push self.bindsTo.name													--NMap,S
      call 'NMap;.get(S):J'														--J
      if (self._debug) {
        push 'pre binding for ' + self.bindsTo.name
        call 'J.debug(S):J'
      }
      call 'J.oclIsUndefined()'													--B
      call 'B.not():B'															--B
      
      if found																	--
        if (self.parts_cover_key()){
          push 'OclUndefined'
          push '#native'
          new																	--J
          variable self.bindsTo named self.bindsTo.name + 'key_match' {
            analyze self mode class				
            push self.domain().typedModel.name
            call 'MMOF!Classifier;.allInstancesFrom(S):QJ'						--QJ
            if (self._debug) {
              push self.referredClass.name+ ' instances candidates for update'
              call 'J.debug(S):S'
            }
            iterate																--J
              variable self named self.bindsTo.name +'current_inspected' {		--
                analyze self mode bind_key										--B
                call 'B.not():B'												
                if skip_elt
                  load self
                  store self.bindsTo
                skip_elt:
              }
            enditerate
            load self.bindsTo
            if (self._debug) {
              push 'element conforming to key found for '+self.bindsTo.name
              call 'J.debug(S):J'
            }
            call 'J.oclIsUndefined():B'
            if create
              if (self._debug){
                load self.bindsTo
            	push 'element selected by key'
            	call 'J.debug(S):J'
            	pop
              }
              load self.pattern()
              push self.bindsTo.name
              load self.bindsTo
              call 'NMap;.including(SJ):NMap;'
              store self.pattern()
              goto found
          }
        }
        create:
          load self.pattern()
          push self.bindsTo.name
          
          push self.referredClass.name
          push self.pattern().eContainer().typedModel.name+'MM'
          new
          if (self.parts_cover_key()){
            foreach (pti in self.key_part()) {
              if (pti.isContainerOf(self)){
                dup
                load self.pattern()
                push pti.objContainer.bindsTo.name
                call 'NMap;.get(S):J'
                swap
                if (self._debug){		--J1,J2
                  swap					--J2,J1
                  dup_x1				--J1,J2,J1
                  call 'J.toString():S' --J1,J2,S
                  push '.'+pti.referredProperty.name+' key container property set to'
                  call 'S.concat(S):S'
                  call 'J.debug(S):J'
                }
                set pti.referredProperty.name  --pti.referredProperty.eOpposite.name  
              } else {
                dup
                load self.pattern()
                variable pti named 'context' {
                  analyze pti.value
                }
--                if (self._debug){		--J1,J2
--                  swap					--J2,J1
--                  dup_x1				--J1,J2,J1
--                  call 'J.toString():S' --J1,J2,S
--                  push '.'+pti.referredProperty.name+' key property set to'
--                  call 'S.concat(S):S'
--                  call 'J.debug(S):J'
--                }
                set pti.referredProperty.name
              }
            }
          }
          if (self._debug){
            push self.referredClass.name+' created'
            call 'J.debug(S):J'
          }
--          analyze self mode class
--          push self.domain().name
--          call 'MMOF!Classifier;.newInstanceIn(S):J'
          call 'NMap;.including(SJ):NMap;'
          store self.pattern()
      found:								--
      load self.pattern()
      foreach (pti in self.part->select(pti | pti.value isa TemplateExp)) {
        analyze pti.value mode force_bind_element		--NMap
      }
  }
   
  ObjectTemplateExp mode bind_key {  		
    pusht									--B
    foreach (pti in self.key_part()) {
      if (pti.isContainerOf(self)) {
        load self.pattern()					--B,NMap
        push pti.objContainer.bindsTo.name	--B,NMap,S
        call 'NMap;.get(S):J'				--B,J
        get pti.referredProperty.name		--B,J
        load self							--B,J,J
        if (pti.referredProperty.many) {
          call 'CJ.includes(J):B'
        } else {
          call 'J.=(J):B'
        }									--B,B
        call 'B.and(B):B'					--B
      } else {
        load self							--B,J
        get pti.referredProperty.name		--B,J
        load self.pattern()
        variable pti named 'context' {
          analyze pti.value					--B,J,J
        }
        call 'J.=(J):B'						--B,B
        call 'B.and(B):B'					--B
      }
    }
  }
  
  function ObjectTemplateExp::parts_cover_key() =
    self.matching_keys().size() > 0
  ;
  
  function ObjectTemplateExp::matching_keys() =
    self.keys_on_type()
    ->select(k | 
    			k.part.asSet().intersection(
    			  self.part->collect(p | p.referredProperty).union(self.containerPropertySingleton())
    			).size() = k.part.size()
    )
  ; 
  
  function ObjectTemplateExp::containerPropertySingleton() =
    if self.eContainer() isa PropertyTemplateItem then
      if not self.eContainer().referredProperty.eOpposite.oclIsUndefined() then
        Sequence{self.eContainer().referredProperty.eOpposite}
      else
         Sequence{}
      endif
    else
      Sequence{}
    endif
    ;
  
  function ObjectTemplateExp::keys_on_type() =
    self.relation().transformation.ownedKey->select(k |k.identifies.isSuperTypeOf(self.referredClass))
  ;
  
  function PropertyTemplateItem::isContainerOf(ote) =
    self.value = ote
  ;
  
  function ObjectTemplateExp::key_part() =
    self.part->select(pti | self.matching_keys().first().part.includes(pti.referredProperty))
    .union(
      if self.eContainer() isa PropertyTemplateItem then
        if self.eContainer().referredProperty.eOpposite.oclIsUndefined() then
          Sequence{}
        else
          Sequence{self.eContainer()}->select(p | self.matching_keys().first().part.includes(p.referredProperty.eOpposite) )
        endif
      else
        Sequence{}
      endif
    )
  ;
  
  Relation mode pre_binding {
    push 'Map'
    push '#native'
    new
    if (not self.isTopLevel) {
      foreach (d in self.domain) {
        push d.rootVariable.name
        load d.rootVariable.name
        call 'NMap;.including(SJ):NMap;'
      }
    }
  }
  
  Pattern {								--NMap
    push 'Set'
    push '#native'
    new									--NMap,EJ
    swap								--EJ,NMap
    call 'EJ.including(J):EJ'			--EJ
    variable self named 'contexts' {	--
      foreach (exp in self.predicate->collect(p | p.conditionExpression)) {
         analyze exp mode match
      }
      load self
    }
    if (self._debug) {
      push ''
      push self.__xmiID__+' pattern bindings'
      call 'J.debug(S):J'
      pop
      dup
      iterate
        push '       '
        call 'J.debug(S):J'
        pop
      enditerate
    }
  }

  DomainPattern {												--NMap   
    variable self named 'context' {								--
      push 'Set'
      push '#native'
      new														--EJ
      load self													--EJ,NMap
      push self.templateExpression.bindsTo.name					--EJ,NMap,S
      call 'NMap;.get(S):J'										--EJ,J
      call 'J.oclIsUndefined():B'								--EJ,B
      call 'B.not():B'											--EJ,B
      if skip_search											--EJ
        analyze self.templateExpression mode class				--EJ,J
        push self.eContainer().typedModel.name					--EJ,J,S
        call 'MMOF!Classifier;.allInstancesFrom(S):EJ'			--EJ,EJ
        iterate													--EJ,J
          variable self.templateExpression named 'object' {		--EJ
            load self											--EJ,NMap
            push self.templateExpression.bindsTo.name			--EJ,NMap,S
            load self.templateExpression						--EJ,NMap,S,J
            call 'NMap;.including(SJ):NMap;'					--EJ,NMap
            call 'EJ.including(J):EJ'							--EJ
          }
        enditerate
        goto end
      skip_search:												--EJ
        load self												--EJ,NMap
        call 'EJ.including(J):EJ'								--EJ
      end:
    }
    variable self named 'contexts' {							--
      analyze self.templateExpression mode match
      load self
    }
    if (self._debug) {
      push ''
      push self.__xmiID__+' pattern bindings'
      call 'J.debug(S):J'
      pop
      dup
      iterate
        push '       '
        call 'J.debug(S):J'
        pop
      enditerate
    }
  }
  
  --*****************************************************************************************

  RelationCallExp mode match | self.referredRelation.isTopLevel {
    getasm
    get 'relationCalls'
    push self.referredRelation.name
    call 'NMap;.get(S):J'
    if skip_call
      getasm
      load 'enforce'
      call 'A.'+self.referredRelation.name+'(B):'
      pop
    skip_call:
    push 'Set'
    push '#native'
    new																				--ENMap
    load self.pattern()																--ENMap,ENMap
    iterate																			--ENMap,NMap
      variable self named 'context' {												--ENMap
        push 'T'+self.referredRelation.name
        push 'Traceability'
        findme
        push 'traces'
        call 'MMOF!Classifier;.allInstancesFrom(S):EJ'								--ENMap,EJ
        iterate																		--ENMap,J
          analyze self mode unify													--ENMap,B
          call 'B.not():B'															--ENMap,B
          if skip_add																--ENMap
            load self																--ENMap,NMap
            call 'EJ.including(J):EJ'												--ENMap
          skip_add:																	--ENMap
        enditerate
      }
    enditerate
    store self.pattern()															--
  }
  
  RelationCallExp mode match {
    push 'Set'
    push '#native'
    new
    load self.pattern()
    iterate
      variable self named 'context' {
        analyze self  --no need to call unify since in a non top level relation call, all arguments have to be bound
        call 'B.not():B'
        if skip_add
          load self
          call 'EJ.including(J):EJ'
        skip_add:
      }
    enditerate
    store self.pattern()
  }

  function RelationCallExp::getRootVariableCorrespondingTo(a) = 
    self.referredRelation.domain.asSequence().at(
      self.argument.indexOf(a)
    ).rootVariable
  ;

  RelationCallExp mode unify | self.referredRelation.isTopLevel {  					--J
    pusht																			--J,B
    swap																			--B,J
    foreach (a in self.argument) {
      dup_x1																		--J,B,J
      get self.getRootVariableCorrespondingTo(a).name								--J,B,J
      analyze a mode unify															--J,B,B
      if (self._debug) {
        load self
        push 'new context'
        call 'J.debug(S):J'
        pop
      }
      call 'B.and(B):B'																--J,B
      swap																			--B,J
    }
    pop																				--B
  }

  RelationCallExp mode unify {
    analyze self
  }
  
  RelationCallExp mode post_unify {
    analyze self
  }

  RelationCallExp {
    getasm
    load 'enforce'
    foreach (a in self.argument) {
      analyze a
    }
    call 'A.'+self.referredRelation.name+'(B'+self.argument->collect(a | 'J').prepend('').sum()+'):B'
  }
  
  VariableExp {
    load self.context_provider()							--NMap
    push self.referredVariable.name							--NMap,S
    call 'NMap;.get(S):J'									--J
  }
  
  VariableExp mode unify {  								--J
    variable self named self.referredVariable.name {
      analyze self
      dup													--J,J
      call 'J.oclIsUndefined():B'							--J,B
      if bind												--J
        load self											--J,J
        call 'J.=(J):B'										--B
        goto end
      bind:													--J
        pop													--
        load self.context_provider()						--NMap
        push self.referredVariable.name						--NMap,S
        load self											--NMap,S,J
        call 'NMap;.including(SJ):NMap;'					--NMap
        store self.context_provider()						--
        pusht												--B
      end:
    }
  }
  
  VariableExp mode post_unify {  								--J
    variable self named self.referredVariable.name {
      analyze self
      dup													--J,J
      call 'J.oclIsUndefined():B'							--J,B
      if bind												--J
        load self											--J,J
        call 'J.=(J):B'										--B
        goto end
      bind:													--J
        pop													--
        load self.context_provider()						--NMap
        push self.referredVariable.name						--NMap,S
        load self											--NMap,S,J
        call 'NMap;.including(SJ):NMap;'					--NMap
        store self.context_provider()						--
        pusht												--B
      end:
    }
  }

  OCLExpression mode match {
    push 'Set'
    push '#native'
    new
    load self.pattern()
    iterate
      variable self named 'context' {
        pusht
        analyze self mode unify
        call 'B.not():B'
        if skip
          load self
          call 'EJ.including(J):B'
        skip:
      }
    enditerate
  }
  
  StringLiteralExp {
    push self.stringSymbol
  }
  
  OCLExpression mode unify {								--J
    analyze self											--J,J
    call 'J.=(J):B'											--B
  }
  
  OCLExpression mode post_unify {								--J
    analyze self											--J,J
    call 'J.=(J):B'											--B
  }
  
  function OperationCallExp::conformsToRestriction()=
    if self.referredOperation.name = '=' then
      self.argument.first() isa VariableExp
    else
      false
    endif
  ;
  
  function OperationCallExp::conformsToRestrictionInverted()=
    if self.referredOperation.name = '=' then
      self.source isa VariableExp and not (self.argument.first() isa VariableExp)
    else
      false
    endif
  ;
  
  OperationCallExp mode match | self.conformsToRestriction() or self.conformsToRestrictionInverted() {
    push 'Set'
    push '#native'
    new															--ENMap
    load self.pattern()											--ENMap,ENMap
    iterate														--ENMap,NMap
      variable self named 'context' {							--ENMap
        analyze self mode unify									--ENMap,B
        call 'B.not():B'										--ENMap,B
        if skip_add												--ENMap
          load self												--ENMap,NMap
          call 'EJ.including(J):EJ'								--ENMap
        skip_add:
      }
    enditerate
  }
  
  OperationCallExp {
    if (self.source.oclIsUndefined()) {
      getasm
    } else {
      analyze self.source  
    }
    foreach (a in self.argument) {
      analyze a
    }
    call 'J.'+self.referredOperation.name+'('+self.argument->collect(a | 'J').prepend('').sum()+'):J'
  }
  
  OperationCallExp mode unify | self.conformsToRestriction() { 
    analyze self.source										--J
    analyze self.argument.first() mode unify				--B
  }
  
  OperationCallExp mode post_unify | self.conformsToRestriction() { 
    analyze self.source										--J
    analyze self.argument.first() mode post_unify			--B
  }
  
  OperationCallExp mode unify | self.conformsToRestrictionInverted() { 
    analyze self.argument.first()							--J
    analyze self.source mode unify							--B
  }
  
  OperationCallExp mode post_unify | self.conformsToRestrictionInverted() { 
    analyze self.argument.first()							--J
    analyze self.source mode post_unify							--B
  }
  
  OperationCallExp mode unify {		--J
    analyze self
    call 'J.=(J):B'
  }
  
  OperationCallExp mode post_unify {		--J
    analyze self
    call 'J.=(J):B'
  }
  
  OperationCallExp mode match {
    push 'Set'
    push '#native'
    new															--ENMap
    load self.pattern()											--ENMap,ENMap
    iterate														--ENMap,NMap
      variable self named 'context' {							--ENMap
        analyze self
        call 'B.not():B'										--ENMap,B
        if skip_add												--ENMap
          load self												--ENMap,NMap
          call 'EJ.including(J):EJ'								--ENMap
        skip_add:
      }
    enditerate
  }
  
  ObjectTemplateExp mode match {  
    push 'Set'
    push '#native'
    new															--ENMap
    load self.pattern()											--ENMap,ENMap
    iterate														--ENMap,NMap
      variable self named 'context' {							--ENMap
        load self												--ENMap,NMap
        push self.bindsTo.name									--ENMap,NMap,S
        call 'NMap;.get(S):J'									--ENMap,J
        variable self.bindsTo named 'object' {					--ENMap
          load self.bindsTo										--ENMap,J
          call 'J.oclIsUndefined():B'							--ENMap,B
          call 'B.not():B'										--ENMap,B
          load self.bindsTo										--ENMap,B,J
          analyze self mode class								--ENMap,B,J,J
          call 'J.oclIsKindOf(J):B'								--ENMap,B,B
          call 'B.and(B):B'										--ENMap,B
          call 'B.not():B'										--ENMap,B
          if skip_inclusion										--ENMap
            load self											--ENMap,NMap
            call 'EJ.including(J):EJ'							--ENMap
          skip_inclusion:          
        }
      }																			
    enditerate																	
    store self.pattern()										--
    
    foreach (p in self.part) {
      analyze p mode match
    }
  }
  
  --Special case multiple bindings can be added at once
  PropertyTemplateItem mode match | self.value isa ObjectTemplateExp and self.referredProperty.many {
    push 'Set'
    push '#native'
    new																			--ENMap    
    load self.pattern()															--ENMap,ENMap
    iterate																		--ENMap,NMap
      variable self named 'context' {											--ENMap
        load self																--ENMap,NMap
        push self.objContainer.bindsTo.name										--ENMap,NMap,S
        call 'NMap;.get(S):J'													--ENMap,J
        get self.referredProperty.name											--ENMap,CJ
        load self																--ENMap,CJ,NMap
        push self.value.bindsTo.name											--ENMap,CJ,NMap,S
        call 'NMap;.get(S):J'													--ENMap,CJ,J
        dup																		--ENMap,CJ,J,J
        call 'J.oclIsUndefined():B'												--ENMap,CJ,J,B
        if add_candidates														--ENMap,CJ,J
          call 'CJ.includes(J):B'												--ENMap,B
          call 'B.not():B'														--ENMap,B
          if skip_add															--ENMap
            load self															--ENMap,NMap
            call 'EJ.including(J):EJ'											--ENMap
          skip_add:																--ENMap
          goto end_context
        add_candidates:															--ENMap,CJ,J
          pop																	--ENMap,CJ
          iterate																--ENMap,J
            variable self.value.bindsTo named 'object' {						--ENMap
              load self															--ENMap,NMap
              push self.value.bindsTo.name										--ENMap,NMap,S
              load self.value.bindsTo											--ENMap,NMap,S,J
              call 'NMap;.including(SJ):NMap;'									--ENMap,NMap
              call 'EJ.including(J):EJ'											--ENMap
            }
          enditerate
        end_context:
      }																			--ENMap
    enditerate
    store self.pattern()	
    
    analyze self.value mode match 				
  }
  
  PropertyTemplateItem mode match {
    push 'Set'
    push '#native'
    new																			--ENMap    
    load self.pattern()															--ENMap,ENMap
    iterate																		--ENMap,NMap
      variable self named 'context' {											--ENMap
        load self																--ENMap,NMap
        push self.objContainer.bindsTo.name										--ENMap,NMap,S
        call 'NMap;.get(S):J'													--ENMap,J
        get self.referredProperty.name											--ENMap,J
        if (self.value isa CollectionTemplateExp and not self.referredProperty.many) {
          call 'J.as'+self.value.referredCollectionType.name+'():CJ'			--ENMap,CJ
        }
        analyze self.value mode unify											--ENMap,B
        call 'B.not():B'														--ENMap,B
        if skip_add																--ENMap
          load self																--ENMap,NMap
          call 'EJ.including(J):EJ'												--ENMap
        skip_add:
      }
    enditerate
    store self.pattern()
    
    if (self.value isa TemplateExp) {
      analyze self.value mode match
    }
  }
  
  ObjectTemplateExp mode unify {											--J
    load self.context_provider()											--J,NMap
    push self.bindsTo.name													--J,NMap,S
    call 'NMap;.get(S):J'													--J,J
    dup																		--J,J,J
    call 'J.oclIsUndefined():B'												--J,J,B
    if bind																	--J,J
      call 'J.=(J):B'														--B
      call 'B.not():B'														--B
      goto end
    bind:																	--J,J
      pop																	--J
      variable self named 'object' {										--
        load self.context_provider()										--NMap
        push self.bindsTo.name												--NMap,S
        load self															--NMap,S,J
        call 'NMap;.including(SJ):NMap;'										--NMap
        store self.context_provider()
        pusht																--B
      }
    end:
  }
    
  function EStructuralFeature::hasSequenceType() =
    self.many and self.ordered and not self.unique
  ;
  
  function CollectionTemplateExp::mustCheckUnicity() =
    if self.eContainer() isa PropertyTemplateItem then
      self.eContainer().referredProperty.hasSequenceType() and not self.referredCollectionType isa "Sequence"
    else
      false
    endif
  ;
    
  CollectionTemplateExp mode unify {										--CJ
    variable self named 'object' {											--
      load self.context_provider()											--NMap
      push self.bindsTo.name												--NMap,S
      call 'NMap;.get(S):J'													--CJ
      dup																	--CJ,CJ
      call 'J.oclIsUndefined():B'											--CJ,B
      if bind																--CJ
        if (self.mustCheckUnicity()) {
          load self															--CJ,CJ
          call 'CJ.size():I'												--CJ,I
          load self															--CJ,I,CJ
          call 'CJ.asSet():I'												--CJ,I,EJ
          call 'CJ.size():I'												--CJ,I,I
          call 'J.=(J):J'													--CJ,B
          if same_size														--CJ
            pushf															--B
            goto end
          same_size:														--CJ
        }
        load self															--CJ,CJ
        call 'J.as'+self.referredCollectionType.name+'():CJ'				--CJ,CJ
        call 'CJ.=(CJ):B'													--B
        goto end
      bind:																	--CJ
        pop																	--
        load self.context_provider()										--NMap
        push self.bindsTo.name												--NMap,S
        load self															--NMap,S,CJ
        call 'NMap;.including(SJ):NMap;'										--NMap
        store self.context_provider()										--
        pusht																--B
      end:																	--B
    }
  }

--***************************************************************************
--*  8.3 The Expressions Package from OCL formal/06-05-01					*
--***************************************************************************

TypeExp {
	push self.referredType.name
	if (self.referredType.package.name='ecore') { --TODO find more general solution
		push '%EMF'
	} else {
		push self.referredType.package.name
	}
	findme
}

IfExp {
	analyze self.condition
	if thn
	analyze self.elseExpression
	goto end
	thn:
	analyze self.thenExpression
	end:
	
}


PropertyCallExp { --TODO move check to operation
	analyze self.source
	get self.referredProperty.name
}

OperationCallExp | if not(self.source.oclIsUndefined()) then
		self.source.eType isa CollectionType and self.eType isa PrimitiveType and self.eType.name = 'Integer' 
		else false endif {
	analyze self.source
	analyze self.argument
	pushi 0 --TODO?
	call self.eType.encodeType() +'.including(J):'+ self.eType.encodeType()
	call self.referredOperation.encodeType()
}

--***************************************************************************
--*  8.3.5 Literal Expressions from OCL formal/06-05-01						*
--***************************************************************************
BooleanLiteralExp | self.booleanSymbol {
	pusht
}

BooleanLiteralExp {
	pushf
}

IntegerLiteralExp {
	pushi self.integerSymbol
}

RealLiteralExp {
	pushd self.realSymbol
}
	
StringLiteralExp {
	push self.stringSymbol
}

NullLiteralExp {
	push 'OclUndefined'
	push '#native'
	new
}

CollectionLiteralExp {
  push self.kind.toString()
  push '#native'
  new
  foreach (part in self.part) {
    analyze part
    if (part isa CollectionItem) {
      call 'CJ.including(J):CJ' --FIXME
    } else { 
      if (part isa CollectionItem) {
        call 'CJ.union(CJ):CJ'--FIXME
      } else {
        report error 'CollectionLiteralExp can only contain CollectionItem or CollectionRange'
      }
    }
  }
}

CollectionItem {
	analyze self.item
}

CollectionRange { --TODO
	push 'Sequence'
	push '#native'
	new
	analyze self.last
	analyze self.first
	
	call 'QJ.including(J):QJ'--FIXME
}

--***************************************************************************
--*  11.9 Mapping Rules for Predefined Iterator Expressions
--*  from OCL formal/06-05-01
--***************************************************************************

IterateExp | self.name = 'iterate' {
	if (self.result isa CollectionType) {
		push self.eType.getTypeName()
		push '#native'
		new	
	} else {
		push 'OclUndefined'
		push '#native'
		new
	}
	variable self.result named self.result.name {
		analyze self.result mode initit
		analyze self.source
		foreach (i in self.iterator) {
			if (i<>self.iterator.last()) {
				dup
			}
		}
		foreach (i in self.iterator) {
			push 'OclUndefined'
			push '#native'
			new
			variable i named i.name {[
				foreach (j in self.iterator) {
					iterate
					store j --we cant use variable here, so we store explicitly
					[
						analyze self.body mode withResult
						analyze self.result mode storeit
					]
				}
			]}
			enditerate
		}
	}
}

IteratorExp | self.name = 'collect' or self.name = 'collectNested' {
	if (self.iterator.size() <> 1) {
		report error 'Iterator expression '+ self.name +' must have at most one iterator'
	}
	let colType = self.eType.getTypeName() {
		if (colType='Set') {
			push 'Bag'
		} else {
			push colType
		} 
	}
	push '#native'
	new
	analyze self.source
	let i = self.iterator.first() {
		iterate
			variable i named i.name {
				analyze self.body mode withResult
				call 'CJ.including(J):CJ'
			}
		enditerate
	}
}

IteratorExp | self.name = 'select' {
	if (self.iterator.size() <> 1) {
		report error 'Iterator expression '+ self.name +' must have at most one iterator'
	}
	push self.eType.getTypeName()
	push '#native'
	new
	analyze self.source
	let i = self.iterator.first() {
		iterate
			variable i named i.name {
				analyze self.body mode withResult
				if skip
					load i
					call self.eType.encodeType() +'.including(J):'+ self.eType.encodeType()
				skip:
			}
		enditerate
	}
}
	
IteratorExp | self.name = 'reject' and self.source.eType isa SetType {
	if (self.iterator.size() <> 1) {
		report error 'Iterator expression '+ self.name +' must have at most one iterator'
	}
	push self.eType.getTypeName()
	push '#native'
	new
	analyze self.source
	let i = self.iterator.first() {
		iterate
			variable i named i.name {
				analyze self.body mode withResult
				call 'B.not():B'
				if skip
					load i
					call self.eType.encodeType() +'.including(J):'+ self.eType.encodeType()
				skip:
			}
		enditerate
	}
}

IteratorExp | self.name = 'exists' {
	pushf
	analyze self.source
	foreach (i in self.iterator) {
		if (i<>self.iterator.last()) {
			dup
		}
	}
	foreach (i in self.iterator) {
		push 'OclUndefined'
		push '#native'
		new
		variable i named i.name {[
			
			foreach (j in self.iterator) {
				iterate
				store j --we cant use ACG's variable construct here, so we store explicitly
				[
					dup
					if found2 --TODO: optimize for other loops?
						analyze self.body mode withResult
						call 'B.or(B):B'
					found2: --shortcut the iteration
				]
			}
		]}
		enditerate
	}
}

--TODO iterate IteratorExp
IteratorExp | self.name = 'forAll' {
	pushf
	analyze self.source
	foreach (i in self.iterator) {
		if (i<>self.iterator.last()) {
			dup
		}
	}
	foreach (i in self.iterator) {
		push 'OclUndefined'
		push '#native'
		new
		variable i named i.name {[
			
			foreach (j in self.iterator) {
				iterate
				store j --we cant use ACG's variable construct here, so we store explicitly
				[
					dup
					if foundfalse
						call 'B.not():B'
						analyze self.body mode withResult
						call 'B.xor(B):B'
					foundfalse:
				]
			}
		]}
		enditerate
	}
}	

IteratorExp | self.name = 'isUnique' { --TODO test
	if (self.iterator.size() <> 1) {
		report error 'Iterator expression '+ self.name +' must have at most one iterator'
	}
	pusht
	variable self named 'result' {
		push 'Set'
		push '#native'
		new
		analyze self.source
		let i = self.iterator.first() {
			iterate --SE
				variable i named i.name { --TODO: optimize by shortcutting loop body
					dup --SS
					analyze self.body mode withResult --SSR
					dup_x1 --SRSR
					call 'EJ.includes(J):B'	--SRB
					if found
						call 'EJ.include(J):EJ'
						goto next
					found:
						pop
						pushf
						store self
					next:
				}
			enditerate
		}
		pop
		load self
	}
}

IteratorExp | self.name = 'any' { --TODO test
	if (self.iterator.size() <> 1) {
		report error 'Iterator expression '+ self.name +' must have at most one iterator'
	}
	pusht										--B
	analyze self.source 						--BS
	let i = self.iterator.first() {
			iterate 							--BE 
				swap							--EB
				dup_x1							--BEB
				if notfound						--BE
					pop							--B
					goto next
				notfound:
				variable i named i.name { 		--B
						analyze self.body mode withResult		--BB
						call 'B.and(B):B'		--B
				}
				next:						
			enditerate
			if none
				load i
				goto end
			none:
				push 'OclUndefined'
				push '#native'
				new
			end:
	}
}
	
IteratorExp | self.name = 'one' { --TODO test
	if (self.iterator.size() <> 1) {
		report error 'Iterator expression '+ self.name +' must have at most one iterator'
	}
	pushi 0
	analyze self.source						--IS
	let i = self.iterator.first() {
		iterate								--IE
			variable i named i.name {		--I
				analyze self.body mode withResult			--IB
				call 'B.not():B'			--IB
				if nfound					--I
					pushi 1
					call 'I.+(I):I'
				nfound:
			}
		enditerate
		pushi 1
		call 'I.=(I):B'
	}
}

IteratorExp | self.name = 'sortedBy' { --TODO test
	if (self.iterator.size() <> 1) {
		report error 'Iterator expression '+ self.name +' must have at most one iterator'
	}
	let colType = self.eType.getTypeName() {
		if (colType='Set' or 'OrderedSet') {
			push 'OrderedSet'
		} else { --Bag or Sequence
			push 'Sequence'
		} 
	}
	push '#native'
	new										--R
	analyze self.source						--RS
	let i = self.iterator.first() {
		iterate 							--RE
			dup								--REE
			variable self named 'val' {		--RE
			variable i named i.name {		--R
				pushi 0
				variable self.body named 'count' {
					analyze self.body mode withResult			--RV
					swap						--VR
					dup_x1						--RVR
					iterate						--RVE
						store i 				--RV
						dup						--RVV
						analyze self.body mode withResult		--RVVV
						call 'B.<(B):B'			--RVB
						if nocount				--RV
							load self.body
							pushi 1
							call 'I.+(I):I'
							store self.body
						nocount:
					enditerate					--RV
					pop							--R
					load self					--RE
					load self.body				--REI
					call 'CJ.insertAt(JI):CJ'	--R
				}
			}}
		enditerate
	}
}

}

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