org.mov.parser.expression
Class TerminalExpression

java.lang.Object
  org.mov.parser.expression.AbstractExpression
      org.mov.parser.expression.TerminalExpression

All Implemented Interfaces:

java.lang.Cloneable, Expression

Direct Known Subclasses:

DayExpression, DayOfWeekExpression, DayOfYearExpression, GetVariableExpression, MonthExpression, NumberExpression, QuoteExpression, StringExpression, YearExpression

public abstract class TerminalExpression
extends AbstractExpression

Abstract base class for all expressions requiring no arguments.

Field Summary

Fields inherited from interface org.mov.parser.Expression

BOOLEAN_TYPE, FALSE, FLOAT_QUOTE_TYPE, FLOAT_TYPE, INTEGER_QUOTE_TYPE, INTEGER_TYPE, STRING_TYPE, TRUE, TRUE_LEVEL

Constructor Summary

TerminalExpression()
Create a new terminal expression.

Method Summary

int	checkType() Perform type checking on the expression.
int	getChildCount() Return the number of children required in a terminal expression.

Methods inherited from class org.mov.parser.expression.AbstractExpression

clone, equals, getChild, getIndex, getNumberFormat, getParent, hashCode, isRoot, iterator, parseDouble, parseInt, setChild, setParent, simplify, size, size, valueOfDouble, valueOfInt

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.mov.parser.Expression

evaluate, getType, toString

Constructor Detail

TerminalExpression

public TerminalExpression()

Create a new terminal expression.

Method Detail

getChildCount

public int getChildCount()

Return the number of children required in a terminal expression. This will always evaluate to 0.

Returns:

0

checkType

public int checkType()
              throws TypeMismatchException

Description copied from interface: Expression

Perform type checking on the expression.

Returns:

the return type of the expression

Throws:

TypeMismatchException - if the expression has incorrect types