nz.org.venice.parser.expression
Class TerminalExpression

java.lang.Object
  nz.org.venice.parser.expression.AbstractExpression
      nz.org.venice.parser.expression.TerminalExpression

All Implemented Interfaces:

java.lang.Cloneable, Expression

Direct Known Subclasses:

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

public abstract class TerminalExpression

extends AbstractExpression

Abstract base class for all expressions requiring no arguments.

Field Summary

Fields inherited from interface nz.org.venice.parser.Expression

BOOLEAN_TYPE, FALSE, FLOAT_QUOTE_TYPE, FLOAT_TYPE, INTEGER_QUOTE_TYPE, INTEGER_SHORT_TYPE, INTEGER_TYPE, NUMERIC_TYPE, STRING_TYPE, TRUE, TRUE_LEVEL, UNDEFINED_TYPE

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 nz.org.venice.parser.expression.AbstractExpression

clone, equals, getChild, getId, getIndex, getNumberFormat, getParent, getParseMetadata, hashCode, isRoot, iterator, parseDouble, parseInt, printParents, setChild, setChildMutableVersion, setParent, setParseMetadata, simplify, simplifyMutableVersion, size, size, toString, validTree, valueOfDouble, valueOfInt

Methods inherited from class java.lang.Object

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

Methods inherited from interface nz.org.venice.parser.Expression

evaluate, getType

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