Examples of org.eclipse.persistence.jpa.jpql.parser.Expression

Package org.eclipse.persistence.jpa.jpql.parser

Examples of org.eclipse.persistence.jpa.jpql.parser.Expression

org.eclipse.persistence.jpa.jpql.parser.Expression
This is the root interface of the parsed tree representation of a JPQL query. The way a JPQL query is parsed is based on the {@link JPQLGrammar JPQL grammar} used.
Provisional API: This interface is part of an interim API that is still under development and expected to change significantly before reaching stability. It is available at this early stage to solicit feedback from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken (repeatedly) as the API evolves. @see JPQLGrammar @version 2.4.2 @since 2.3 @author Pascal Filion

   * {@inheritDoc}
   */
  @Override
  public void visit(LocateExpression expression) {


    Expression firstExpression  = expression.getFirstExpression();
    Expression secondExpression = expression.getSecondExpression();


    // The first two expressions should be a string
    if (firstExpression .isAncestor(inputParameter) ||
        secondExpression.isAncestor(inputParameter)) {


      this.type = String.class;
    }
    // It either returns an integer or the third argument is an integer
    else {

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   * {@inheritDoc}
   */
  @Override
  public void visit(RegexpExpression expression) {


    Expression patternValue = expression.getPatternValue();
    Expression stringExpression = expression.getStringExpression();


    if (patternValue.isAncestor(inputParameter)) {
      this.expression = expression.getStringExpression();
    }
    else if (stringExpression.isAncestor(inputParameter)) {
      this.expression = expression;
    }
  }

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    // - used as a "root" object in the top-level FROM clause
    // - defined in a UNION clause
    // - used in an IN expression
    // If the flag is false, then the SELECT clause is from a subquery
    if (!multipleSelectItemsAllowed) {
      Expression parent = expression.getParent();
      multipleSelectItemsAllowed = isOwnedByFromClause  (parent) ||
                                   isOwnedByUnionClause (parent) ||
                                   isOwnedByInExpression(parent);
    }

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          endPosition,
          RegexpExpression_MissingStringExpression
        );
      }
      else {
        Expression stringExpression = expression.getStringExpression();


        // Invalid string expression
        if (!isValid(stringExpression, StringExpressionBNF.ID)) {


          int startPosition = position(stringExpression);
          int endPosition   = startPosition + length(stringExpression);


          addProblem(
            expression,
            startPosition,
            endPosition,
            RegexpExpression_InvalidStringExpression
          );
        }
        // Validate string expression
        else {
          stringExpression.accept(this);
        }
      }


      // Missing pattern value
      if (!expression.hasPatternValue()) {


        int startPosition = position(expression) +
                            length(expression.getStringExpression()) +
                            (expression.hasSpaceAfterStringExpression() ? 1 : 0) +
                            6 /* REGEXP */ +
                            (expression.hasSpaceAfterIdentifier() ? 1 : 0);


        int endPosition = startPosition;


        addProblem(expression, startPosition, endPosition, RegexpExpression_MissingPatternValue);
      }
      else {
        Expression patternValue = expression.getStringExpression();


        // Invalid string expression
        if (!isValid(patternValue, PatternValueBNF.ID)) {


          int startPosition = position(expression) +
                              length(expression.getStringExpression()) +
                              (expression.hasSpaceAfterStringExpression() ? 1 : 0) +
                              6 /* REGEXP */ +
                              (expression.hasSpaceAfterIdentifier() ? 1 : 0);


          int endPosition = startPosition + length(patternValue);


          addProblem(
            expression,
            startPosition,
            endPosition,
            RegexpExpression_InvalidPatternValue
          );
        }
        // Validate pattern value
        else {
          patternValue.accept(this);
        }
      }
    }
  }

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    // - used as a "root" object in the top-level FROM clause
    // - defined in a UNION clause
    // - used in an IN expression
    // If the flag is false, then the SELECT clause is from a subquery
    if (!multipleSelectItemsAllowed) {
      Expression parent = expression.getParent();
      multipleSelectItemsAllowed = isOwnedByFromClause  (parent) ||
                                   isOwnedByUnionClause (parent) ||
                                   isOwnedByInExpression(parent);
    }

View Full Code Here

          endPosition,
          RegexpExpression_MissingStringExpression
        );
      }
      else {
        Expression stringExpression = expression.getStringExpression();


        // Invalid string expression
        if (!isValid(stringExpression, StringExpressionBNF.ID)) {


          int startPosition = position(stringExpression);
          int endPosition   = startPosition + length(stringExpression);


          addProblem(
            expression,
            startPosition,
            endPosition,
            RegexpExpression_InvalidStringExpression
          );
        }
        // Validate string expression
        else {
          stringExpression.accept(this);
        }
      }


      // Missing pattern value
      if (!expression.hasPatternValue()) {


        int startPosition = position(expression) +
                            length(expression.getStringExpression()) +
                            (expression.hasSpaceAfterStringExpression() ? 1 : 0) +
                            6 /* REGEXP */ +
                            (expression.hasSpaceAfterIdentifier() ? 1 : 0);


        int endPosition = startPosition;


        addProblem(expression, startPosition, endPosition, RegexpExpression_MissingPatternValue);
      }
      else {
        Expression patternValue = expression.getStringExpression();


        // Invalid string expression
        if (!isValid(patternValue, PatternValueBNF.ID)) {


          int startPosition = position(expression) +
                              length(expression.getStringExpression()) +
                              (expression.hasSpaceAfterStringExpression() ? 1 : 0) +
                              6 /* REGEXP */ +
                              (expression.hasSpaceAfterIdentifier() ? 1 : 0);


          int endPosition = startPosition + length(patternValue);


          addProblem(
            expression,
            startPosition,
            endPosition,
            RegexpExpression_InvalidPatternValue
          );
        }
        // Validate pattern value
        else {
          patternValue.accept(this);
        }
      }
    }
  }

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     * {@inheritDoc}
     */
    public boolean isClauseComplete(DeleteStatement expression) {


      DeleteClause deleteClause = expression.getDeleteClause();
      Expression declaration = deleteClause.getRangeVariableDeclaration();
      boolean complete = isValid(declaration, RangeVariableDeclarationBNF.ID);


      if (complete) {
        complete = isComplete(declaration);
      }

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     * {@inheritDoc}
     */
    public boolean isClauseComplete(DeleteStatement expression) {


      DeleteClause deleteClause = expression.getDeleteClause();
      Expression declaration = deleteClause.getRangeVariableDeclaration();
      boolean complete = isValid(declaration, RangeVariableDeclarationBNF.ID);


      if (complete) {
        complete = isComplete(declaration);
      }

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      int index = expression.childrenSize();


      // Find the index of the expression for which the tree is been visited
      while (--index >= 0) {
        Expression child = expression.getChild(index);


        if (child == this.expression) {
          break;
        }
      }


      // Check to see if an expression before the index is invalid
      while (--index >= 0) {
        Expression child = expression.getChild(index);
        followingInvalidExpression = isInvalidExpression(child);


        if (followingInvalidExpression) {
          index = -1;
        }

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      int index = expression.childrenSize();


      // Find the index of the expression for which the tree is been visited
      while (--index >= 0) {
        Expression child = expression.getChild(index);


        if (child == this.expression) {
          break;
        }
      }


      // Check to see if an expression before the index is invalid
      while (--index >= 0) {
        Expression child = expression.getChild(index);
        followingInvalidExpression = isInvalidExpression(child);


        if (followingInvalidExpression) {
          index = -1;
        }

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Related Classes of org.eclipse.persistence.jpa.jpql.parser.Expression

org.eclipse.persistence.internal.jpa.jpql.ParameterTypeVisitor

org.eclipse.persistence.internal.jpa.jpql.TypeResolver

org.eclipse.persistence.jpa.jpql.AbstractContentAssistVisitor

org.eclipse.persistence.jpa.jpql.AbstractContentAssistVisitor$AbstractConditionalClauseCollectionHelper

org.eclipse.persistence.jpa.jpql.AbstractContentAssistVisitor$AbstractConditionalClauseHelper

org.eclipse.persistence.jpa.jpql.AbstractContentAssistVisitor$AbstractFromClauseStatementHelper

org.eclipse.persistence.jpa.jpql.AbstractContentAssistVisitor$AbstractGroupByClauseStatementHelper

org.eclipse.persistence.jpa.jpql.AbstractContentAssistVisitor$AbstractHavingClauseStatementHelper

org.eclipse.persistence.jpa.jpql.AbstractContentAssistVisitor$AbstractSelectClauseStatementHelper

org.eclipse.persistence.jpa.jpql.AbstractContentAssistVisitor$AbstractWhereClauseSelectStatementHelper

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