net.sf.arise.piji
Class AbstractNode

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

All Implemented Interfaces:

Expression, java.io.Serializable

Direct Known Subclasses:

LeafNode, ListNode

public abstract class AbstractNode

extends java.lang.Object

implements Expression

An implementation of the Expression interface, using a tree structure, hence the name. This abstract superclass spans leaf and tree node subclasses

Author:

Kjetil Valstadsve.

See Also:

Serialized Form

Constructor Summary

AbstractNode()

Method Summary

java.lang.String	toSchemeString() Gets a scheme string representation of this node.
java.lang.String	toString()
protected abstract void	writeToBuffer(java.lang.StringBuffer buffer, int xcoord, boolean indent) Used to get a scheme string representation of this node with proper indentation.

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.arise.piji.Expression

evaluate

Constructor Detail

AbstractNode

public AbstractNode()

Method Detail

writeToBuffer

protected abstract void writeToBuffer(java.lang.StringBuffer buffer,
                                      int xcoord,
                                      boolean indent)

Used to get a scheme string representation of this node with proper indentation.

Parameters:

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

Returns:

A string describing the tree

toSchemeString

public final java.lang.String toSchemeString()

Gets a scheme string representation of this node. Simply calls asSchemeString with a zero offset, should not be redefined by subclasses.

Specified by:

toSchemeString in interface Expression

Returns:

This expression in a string form

toString

public final java.lang.String toString()

Overrides:

toString in class java.lang.Object