Class CompoundExpression

All Implemented Interfaces:
Expression, QueryObject
Direct Known Subclasses:
Add, Concat, Divide, Multiply, Remainder, Subtract

public abstract class CompoundExpression extends AbstractExpression
Abstract base class for compound expression.
Since:
1.3
Version:
$Revision: 7121 $ $Date: 2006-04-25 16:09:10 -0600 (Tue, 25 Apr 2006) $
Author:
Udai Gupta, Ralf Joachim
  • Constructor Details

    • CompoundExpression

      public CompoundExpression()
  • Method Details

    • getOperator

      protected abstract String getOperator()
      Get operator of the compound expression.
      Returns:
      Operator of the compound expression.
    • addExpression

      public final void addExpression(Expression expression)
      Add expression to the end of the list.
      Parameters:
      expression - Expression to add to end of list.
    • getExpressions

      public final List<Expression> getExpressions()
      Get list of expressions.
      Returns:
      List of expressions.
    • toString

      public final StringBuilder toString(StringBuilder sb)
      Append a string representation of the object to the given StringBuilder. In general, the toString method for query objects appends a string that textually represents this object. The result should be a query string that complies to EJB QL specification as long as the query object represents a syntay element of it. It is required that all subclasses override this method. The toString method defined at class Object is overwritten and calls this method.
      Parameters:
      sb - StringBuilder to append the string representation of this object to.
      Returns:
      Same instance of StringBuilder given as parameter.