Class ExpressionElement

java.lang.Object
  |
  +--ExpressionElement

public class ExpressionElement

extends java.lang.Object

This class represents an element of an expression. The possible elements which this class may act for a wrapper for are: java.lang.Integer, Variable, Operator, and GroupingSymbol.

Field Summary

static int	END Identifier for the end of the identifiers
static int	GROUPING_SYMBOL Identifier for a GroupingSymbol element in the wrapper
static int	OPERATOR Identifier for a Operator element in the wrapper
static int	OTHER Identifier for an unknown element in the wrapper
static int	START Identifier for the beginning of the identifiers
int	type Holds one of the identifiers and specifies the type of the object wrapped
static int	VALUE Identifier for an java.lang.Integer element in the wrapper
static int	VARIABLE Identifier for a Variable element in the wrapper

Constructor Summary

ExpressionElement(java.lang.Object o)
Sets the contents and establishes the type with a series of instanceof checks

Method Summary

java.lang.String	toString()
java.lang.String	typeString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

START

public static final int START

Identifier for the beginning of the identifiers

VALUE

public static final int VALUE

Identifier for an java.lang.Integer element in the wrapper

VARIABLE

public static final int VARIABLE

Identifier for a Variable element in the wrapper

OPERATOR

public static final int OPERATOR

Identifier for a Operator element in the wrapper

GROUPING_SYMBOL

public static final int GROUPING_SYMBOL

Identifier for a GroupingSymbol element in the wrapper

OTHER

public static final int OTHER

Identifier for an unknown element in the wrapper

END

public static final int END

Identifier for the end of the identifiers

type

public int type

Holds one of the identifiers and specifies the type of the object wrapped

Constructor Detail

ExpressionElement

public ExpressionElement(java.lang.Object o)

Sets the contents and establishes the type with a series of instanceof checks

Parameters:

o - the object to be wrapped may be an Integer, Variable, Operator, or GroupingSymbol.

Method Detail

typeString

public java.lang.String typeString()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object