com.raritantechnologies.utils.program
Class Value

java.lang.Object
  com.raritantechnologies.utils.program.Value

public class Value

extends java.lang.Object

This class represents a value to be resolved during program execution

Field Summary

static long	MILLISECONDS_IN_A_DAY
static boolean	NOT_A_BOOLEAN
static java.util.Date	NOT_A_DATE
static java.lang.String	NOT_A_STRING
static int	NOT_AN_INT

Constructor Summary

Value(java.lang.String name, int type)
constructor for variables

Value(Token t, Lexer l)
Constructor which performs a symbol table lookup if the symbol is not found, assume it is a word.

Value(Value v)
Constructor which copies a Value

Method Summary

java.lang.Object	clone() Clones a tree (or sub-tree) and returns the root of the new tree.
boolean	evaluate(java.util.HashMap localVars) evaluates an expression tree and returns true or false from the top
Value[]	getArgs() Returns the args
int	getArity() Returns the arity of this node.
boolean	getBool() Returns the boolean
boolean	getBooleanValue(java.util.HashMap localVars) Returns the boolean value of this node.
java.util.Date	getDate() Returns the date
java.util.Date	getDateValue(java.util.HashMap localVars) Returns the date value of this node.
int	getIntValue(java.util.HashMap localVars) Returns the int value of this node.
Value	getLeft() Get the left child of this node.
java.lang.String	getName() Returns the string for the human readable name of the symbol.
int	getNum() Returns the int
int	getParenLevel() Returns the depth that this node is nested within parens.
Value	getParent() Get the parent of this node.
int	getPrecedence() Returns the precedence of this node.
Value	getRight() Get the right child of this node.
java.lang.String	getString() Returns the String
java.lang.String	getStringValue(java.util.HashMap localVars) Returns the string value of this node.
int	getType() Returns the type of this node.
Value	insertValue(Value newValue, Value current) Inserts a node starting at current level, then bubbles up to the proper precedence level.
boolean	isBoolean() Checks whether this is a boolean returning value.
boolean	isDate() Checks whether this is a date returning value.
boolean	isInt() Checks whether this is a integer returning value.
boolean	isString() Checks whether this is a string returning value.
java.lang.String	probeParentField() Scans the tree from this point to find a "parent" field.
void	setArgs(Value[] a) Returns the args
void	setArity(int a) Set the arity of this node.
void	setBooleanValue(boolean b) Set the boolean value of this node.
void	setDateValue(java.util.Date d) Set the date value of this node.
void	setIntValue(int n) Set the int value of this node.
void	setLeft(Value n) Set the left child of this node.
void	setName(java.lang.String n) Sets the name string.
void	setParenLevel(int l) Sets the level or parenthesis depth .
void	setParent(Value n) Set the parent of this node.
void	setPrecedence(int p) Sets the precedence of this node.
void	setRight(Value n) Set the right child of this node.
void	setStringValue(java.lang.String s) Set the string value of this node.
void	setType(int t) Set the type of this node.
java.lang.String	toTreeString()
java.lang.String	toTreeString(int level)

Methods inherited from class java.lang.Object

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

Field Detail

MILLISECONDS_IN_A_DAY

public static final long MILLISECONDS_IN_A_DAY

See Also:

Constant Field Values

NOT_AN_INT

public static final int NOT_AN_INT

See Also:

Constant Field Values

NOT_A_STRING

public static final java.lang.String NOT_A_STRING

NOT_A_DATE

public static final java.util.Date NOT_A_DATE

NOT_A_BOOLEAN

public static final boolean NOT_A_BOOLEAN

See Also:

Constant Field Values

Constructor Detail

Value

public Value(Token t,
             Lexer l)

Constructor which performs a symbol table lookup if the symbol is not found, assume it is a word.

Parameters:

l - the instance of the lexer.

Value

public Value(Value v)

Constructor which copies a Value

Value

public Value(java.lang.String name,
             int type)

constructor for variables

Method Detail

getName

public java.lang.String getName()

Returns the string for the human readable name of the symbol.

setName

public void setName(java.lang.String n)

Sets the name string.

getType

public int getType()

Returns the type of this node.

setType

public void setType(int t)

Set the type of this node.

getParenLevel

public int getParenLevel()

Returns the depth that this node is nested within parens.

setParenLevel

public void setParenLevel(int l)

Sets the level or parenthesis depth .

getPrecedence

public int getPrecedence()

Returns the precedence of this node.

setPrecedence

public void setPrecedence(int p)

Sets the precedence of this node.

getParent

public Value getParent()

Get the parent of this node.

setParent

public void setParent(Value n)

Set the parent of this node.

getLeft

public Value getLeft()

Get the left child of this node.

setLeft

public void setLeft(Value n)

Set the left child of this node.

getRight

public Value getRight()

Get the right child of this node.

setRight

public void setRight(Value n)

Set the right child of this node.

isInt

public boolean isInt()

Checks whether this is a integer returning value.

isString

public boolean isString()

Checks whether this is a string returning value.

isBoolean

public boolean isBoolean()

Checks whether this is a boolean returning value.

isDate

public boolean isDate()

Checks whether this is a date returning value.

getBooleanValue

public boolean getBooleanValue(java.util.HashMap localVars)

Returns the boolean value of this node.

setBooleanValue

public void setBooleanValue(boolean b)

Set the boolean value of this node.

getIntValue

public int getIntValue(java.util.HashMap localVars)

Returns the int value of this node.

setIntValue

public void setIntValue(int n)

Set the int value of this node.

getDateValue

public java.util.Date getDateValue(java.util.HashMap localVars)

Returns the date value of this node.

setDateValue

public void setDateValue(java.util.Date d)

Set the date value of this node.

getStringValue

public java.lang.String getStringValue(java.util.HashMap localVars)

Returns the string value of this node.

setStringValue

public void setStringValue(java.lang.String s)

Set the string value of this node.

getString

public java.lang.String getString()

Returns the String

getNum

public int getNum()

Returns the int

getDate

public java.util.Date getDate()

Returns the date

getBool

public boolean getBool()

Returns the boolean

setArgs

public void setArgs(Value[] a)

Returns the args

getArgs

public Value[] getArgs()

Returns the args

getArity

public int getArity()

Returns the arity of this node.

setArity

public void setArity(int a)

Set the arity of this node.

insertValue

public Value insertValue(Value newValue,
                         Value current)

Inserts a node starting at current level, then bubbles up to the proper precedence level. returns the new root node or null if root hasn't changed

probeParentField

public java.lang.String probeParentField()

Scans the tree from this point to find a "parent" field.

clone

public java.lang.Object clone()

Clones a tree (or sub-tree) and returns the root of the new tree.

evaluate

public boolean evaluate(java.util.HashMap localVars)

evaluates an expression tree and returns true or false from the top

toTreeString

public java.lang.String toTreeString()

toTreeString

public java.lang.String toTreeString(int level)