net.sf.arise.piji
Class LeafNode

java.lang.Object
  |
  +--net.sf.arise.piji.AbstractNode
        |
        +--net.sf.arise.piji.LeafNode

All Implemented Interfaces:

Expression, java.io.Serializable

public final class LeafNode

extends AbstractNode

A Scheme tree leaf node

Author:

Kjetil Valstadsve

See Also:

Serialized Form

Constructor Summary

(package private)	LeafNode(boolean b) A constructor for a leaf with a boolean content
(package private)	LeafNode(byte b) A constructor for a leaf with a byte content
(package private)	LeafNode(char c) A constructor for a leaf with a char content
(package private)	LeafNode(double d) A constructor for a leaf with a double content
(package private)	LeafNode(float f) A constructor for a leaf with a float content
(package private)	LeafNode(int i) A constructor for a leaf with an integer content
(package private)	LeafNode(long l) A constructor for a leaf with a long content
(package private)	LeafNode(java.lang.Object content) A constructor for a leaf with a general object content
(package private)	LeafNode(short s) A constructor for a leaf with a short content

Method Summary

boolean	equals(java.lang.Object object)
java.lang.Object	evaluate(Context context) Evaluates the content of this leaf in the given environment.
(package private) java.lang.Object	getContent() Get the content of the leaf
(package private) java.lang.String	getStringContent()
(package private) Symbol	getSymbolContent()
int	hashCode()
(package private) boolean	isContentExplicitlyTyped()
(package private) boolean	isContentHolder()
(package private) boolean	isContentString()
(package private) boolean	isContentSymbol()
protected void	writeToBuffer(java.lang.StringBuffer buffer, int x, boolean i) Returns the string value of the content

Methods inherited from class net.sf.arise.piji.AbstractNode

toSchemeString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

LeafNode

LeafNode(java.lang.Object content)

A constructor for a leaf with a general object content

LeafNode

LeafNode(boolean b)

A constructor for a leaf with a boolean content

Parameters:

b - The content

LeafNode

LeafNode(char c)

A constructor for a leaf with a char content

Parameters:

c - The content

LeafNode

LeafNode(int i)

A constructor for a leaf with an integer content

Parameters:

i - The content

LeafNode

LeafNode(long l)

A constructor for a leaf with a long content

Parameters:

l - The content

LeafNode

LeafNode(float f)

A constructor for a leaf with a float content

Parameters:

f - The content

LeafNode

LeafNode(double d)

A constructor for a leaf with a double content

Parameters:

d - The content

LeafNode

LeafNode(byte b)

A constructor for a leaf with a byte content

Parameters:

b - The content

LeafNode

LeafNode(short s)

A constructor for a leaf with a short content

Parameters:

s - The content

Method Detail

isContentExplicitlyTyped

boolean isContentExplicitlyTyped()

isContentSymbol

boolean isContentSymbol()

isContentString

boolean isContentString()

isContentHolder

boolean isContentHolder()

getSymbolContent

Symbol getSymbolContent()

getStringContent

java.lang.String getStringContent()

getContent

java.lang.Object getContent()

Get the content of the leaf

Returns:

The content of the leaf

writeToBuffer

protected void writeToBuffer(java.lang.StringBuffer buffer,
                             int x,
                             boolean i)

Returns the string value of the content

Specified by:

writeToBuffer in class AbstractNode

Parameters:

x - Used to set the indentation for printing, enabling proper tree structuring of the output

Returns:

A string describing the tree

equals

public boolean equals(java.lang.Object object)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

evaluate

public java.lang.Object evaluate(Context context)
                          throws java.lang.Throwable

Evaluates the content of this leaf in the given environment. Iff content is a symbol, look it up in the context

Parameters:

context - The context to evaluate in

Returns:

The value of the content

Throws:

EvaluationException - Thrown iff something bad happens

java.lang.Throwable - iff the evaluation goes awry