nz.org.venice.parser.expression
Class LogicExpression

java.lang.Object
  nz.org.venice.parser.expression.AbstractExpression
      nz.org.venice.parser.expression.BinaryExpression
          nz.org.venice.parser.expression.LogicExpression

All Implemented Interfaces:

java.lang.Cloneable, Expression

Direct Known Subclasses:

AndExpression, OrExpression

public abstract class LogicExpression

extends BinaryExpression

Abstract base class for the boolean expressions: and, or

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

LogicExpression(Expression left, Expression right)
Create a new logic expression with the given left and right arguments.

Method Summary

int	checkType() Check the input arguments to the expression.
int	getType() Get the type of the expression.
protected java.lang.String	toString(java.lang.String operator) Helper method to conver the given expression to a string.

Methods inherited from class nz.org.venice.parser.expression.BinaryExpression

getChildCount

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

Constructor Detail

LogicExpression

public LogicExpression(Expression left,
                       Expression right)

Create a new logic expression with the given left and right arguments.

Method Detail

checkType

public int checkType()
              throws TypeMismatchException

Check the input arguments to the expression. They must both be Expression.BOOLEAN_TYPE.

Returns:

Expression.BOOLEAN_TYPE

Throws:

TypeMismatchException - if the expression has incorrect types

getType

public int getType()

Get the type of the expression.

Returns:

Expression.BOOLEAN_TYPE.

toString

protected java.lang.String toString(java.lang.String operator)

Helper method to conver the given expression to a string. Given an operator such as and, or etc it will return arg1 operator arg2. It will insert parentheses as needed.

Overrides:

toString in class BinaryExpression

Parameters:

operator - the binary operator

Returns:

the string representation