コード例 #1
0
  private String createCodeForQuantifiedExpression(QuantifiedExpression quantExpr) {
    CodeList list = new CodeList();
    addImports("org.pcollections.PCollection");
    Declaration decl = (Declaration) quantExpr.getFirst_isQuantifiedDeclOf_omega().getThat();

    // Declarations and variable iteration loops
    int declaredVars = 0;
    String tabs = "";
    int simpleDecls = 0;
    // quantifier
    Quantifier quantifier = (Quantifier) quantExpr.getFirst_isQuantifierOf_omega().getThat();
    switch (quantifier.get_type()) {
      case FORALL:
        break;
      case EXISTS:
        break;
      case EXISTSONE:
        list.add(new CodeSnippet("boolean result = false;"));
        break;
    }
    scope.blockBegin();
    for (IsSimpleDeclOf_isSimpleDeclOf_omega simpleDeclInc :
        decl.getIsSimpleDeclOf_isSimpleDeclOf_omegaIncidences()) {
      SimpleDeclaration simpleDecl = (SimpleDeclaration) simpleDeclInc.getThat();
      Expression domain =
          (Expression) simpleDecl.getFirst_isTypeExprOfDeclaration_omega().getThat();
      CodeSnippet simpleDeclSnippet = new CodeSnippet();
      simpleDeclSnippet.setVariable("simpleDeclNum", Integer.toString(simpleDecls));
      simpleDeclSnippet.add(
          tabs
              + "PCollection domain_#simpleDeclNum# = (PCollection) "
              + createCodeForExpression(domain)
              + ";");
      list.add(simpleDeclSnippet);
      for (IsDeclaredVarOf_isDeclaredVarOf_omega declaredVarInc :
          simpleDecl.getIsDeclaredVarOf_isDeclaredVarOf_omegaIncidences()) {
        declaredVars++;
        Variable var = (Variable) declaredVarInc.getThat();
        CodeSnippet varIterationSnippet = new CodeSnippet();
        varIterationSnippet.setVariable("variableName", var.get_name());
        varIterationSnippet.setVariable("simpleDeclNum", Integer.toString(simpleDecls));
        varIterationSnippet.add(tabs + "for (Object #variableName# : domain_#simpleDeclNum#) {");
        tabs += "\t";
        scope.addVariable(var.get_name());
        list.add(varIterationSnippet);
      }
      simpleDecls++;
    }

    // condition
    if (decl.getFirst_isConstraintOf_omega() != null) {
      CodeSnippet constraintSnippet = new CodeSnippet();
      constraintSnippet.add(tabs + "boolean constraint = true;");
      for (IsConstraintOf_isConstraintOf_omega constraintInc :
          decl.getIsConstraintOf_isConstraintOf_omegaIncidences()) {
        Expression constrExpr = (Expression) constraintInc.getThat();
        constraintSnippet.add(
            tabs
                + "constraint = constraint && (Boolean) "
                + createCodeForExpression(constrExpr)
                + ";");
      }
      constraintSnippet.add(tabs + "if (constraint)");
      list.add(constraintSnippet);
    }

    // main expression
    Expression resultDefinition =
        (Expression) quantExpr.getFirst_isBoundExprOfQuantifiedExpr_omega().getThat();
    CodeSnippet iteratedExprSnip = new CodeSnippet();
    switch (quantifier.get_type()) {
      case FORALL:
        iteratedExprSnip.add(
            tabs
                + "if ( ! (Boolean) "
                + createCodeForExpression(resultDefinition)
                + ") return false;");
        break;
      case EXISTS:
        iteratedExprSnip.add(
            tabs
                + "if ( (Boolean) "
                + createCodeForExpression(resultDefinition)
                + ") return true;");
        break;
      case EXISTSONE:
        iteratedExprSnip.add(
            tabs + "if ( (Boolean) " + createCodeForExpression(resultDefinition) + ") {");
        iteratedExprSnip.add(tabs + "\tif (result) {");
        iteratedExprSnip.add(tabs + "\t\treturn false; //two elements exists");
        iteratedExprSnip.add(tabs + "\t} else {");
        iteratedExprSnip.add(tabs + "\t\tresult = true; //first element found");
        iteratedExprSnip.add(tabs + "\t}");
        iteratedExprSnip.add(tabs + "}");
    }

    list.add(iteratedExprSnip);
    // closing parantheses for interation loops
    for (int curLoop = 0; curLoop < declaredVars; curLoop++) {
      StringBuilder tabBuff = new StringBuilder();
      for (int i = 1; i < (declaredVars - curLoop); i++) {
        tabBuff.append("\t");
      }
      tabs = tabBuff.toString();
      list.add(new CodeSnippet(tabs + "}"));
    }
    switch (quantifier.get_type()) {
      case FORALL:
        list.add(new CodeSnippet("return true;"));
        break;
      case EXISTSONE:
        list.add(new CodeSnippet("return result;"));
        break;
      case EXISTS:
        list.add(new CodeSnippet("return false;"));
    }
    scope.blockEnd();
    String retVal = createMethod(list);
    return retVal;
  }
コード例 #2
0
  private String createCodeForComprehension(Comprehension compr) {
    addImports("de.uni_koblenz.jgralab.JGraLab");
    addImports("org.pcollections.PCollection");
    CodeList list = new CodeList();
    CodeSnippet initSnippet = new CodeSnippet();
    if (compr instanceof ListComprehension) {
      initSnippet.add("PCollection result = JGraLab.vector();");
    }
    if (compr instanceof SetComprehension) {
      initSnippet.add("PCollection result = JGraLab.set();");
    }
    if (compr instanceof MapComprehension) {
      addImports("org.pcollections.PMap");
      initSnippet.add("PMap result = JGraLab.map();");
    }
    list.add(initSnippet);

    Declaration decl = (Declaration) compr.getFirst_isCompDeclOf_omega().getThat();

    // Declarations and variable iteration loops
    int declaredVars = 0;
    String tabs = "";
    int simpleDecls = 0;
    scope.blockBegin();
    for (IsSimpleDeclOf_isSimpleDeclOf_omega simpleDeclInc :
        decl.getIsSimpleDeclOf_isSimpleDeclOf_omegaIncidences()) {
      SimpleDeclaration simpleDecl = (SimpleDeclaration) simpleDeclInc.getThat();
      Expression domain =
          (Expression) simpleDecl.getFirst_isTypeExprOfDeclaration_omega().getThat();
      CodeSnippet simpleDeclSnippet = new CodeSnippet();
      simpleDeclSnippet.setVariable("simpleDeclNum", Integer.toString(simpleDecls));
      simpleDeclSnippet.add(
          tabs
              + "PCollection domain_#simpleDeclNum# = (PCollection) "
              + createCodeForExpression(domain)
              + ";");
      list.add(simpleDeclSnippet);
      for (IsDeclaredVarOf_isDeclaredVarOf_omega declaredVarInc :
          simpleDecl.getIsDeclaredVarOf_isDeclaredVarOf_omegaIncidences()) {
        declaredVars++;
        Variable var = (Variable) declaredVarInc.getThat();
        CodeSnippet varIterationSnippet = new CodeSnippet();
        varIterationSnippet.setVariable("variableName", var.get_name());
        varIterationSnippet.setVariable("simpleDeclNum", Integer.toString(simpleDecls));
        varIterationSnippet.add(tabs + "for (Object #variableName# : domain_#simpleDeclNum#) {");
        tabs += "\t";
        scope.addVariable(var.get_name());
        list.add(varIterationSnippet);
      }
      simpleDecls++;
    }

    // condition
    if (decl.getFirst_isConstraintOf_omega() != null) {
      CodeSnippet constraintSnippet = new CodeSnippet();
      constraintSnippet.add(tabs + "boolean constraint = true;");
      for (IsConstraintOf_isConstraintOf_omega constraintInc :
          decl.getIsConstraintOf_isConstraintOf_omegaIncidences()) {
        Expression constrExpr = (Expression) constraintInc.getThat();
        constraintSnippet.add(
            tabs
                + "constraint = constraint && (Boolean) "
                + createCodeForExpression(constrExpr)
                + ";");
      }
      constraintSnippet.add(tabs + "if (constraint)");
      list.add(constraintSnippet);
    }

    // main expression
    CodeSnippet iteratedExprSnip = new CodeSnippet();
    if (compr instanceof MapComprehension) {
      Expression keyExpr =
          (Expression)
              ((MapComprehension) compr).getFirst_isKeyExprOfComprehension_omega().getThat();
      Expression valueExpr =
          (Expression)
              ((MapComprehension) compr).getFirst_isValueExprOfComprehension_omega().getThat();
      iteratedExprSnip.add(
          tabs
              + "result.put("
              + createCodeForExpression(keyExpr)
              + ","
              + createCodeForExpression(valueExpr)
              + ");");
    } else {
      Expression resultDefinition = (Expression) compr.getFirst_isCompResultDefOf_omega().getThat();
      iteratedExprSnip.add(
          tabs + "result = result.plus(" + createCodeForExpression(resultDefinition) + ");");
    }
    list.add(iteratedExprSnip);
    // closing parantheses for interation loops
    for (int curLoop = 0; curLoop < declaredVars; curLoop++) {
      StringBuilder tabBuff = new StringBuilder();
      for (int i = 1; i < (declaredVars - curLoop); i++) {
        tabBuff.append("\t");
      }
      tabs = tabBuff.toString();
      list.add(new CodeSnippet(tabs + "}"));
    }
    list.add(new CodeSnippet("return result;"));
    scope.blockEnd();
    String retVal = createMethod(list);
    return retVal;
  }