sjm.examples.pretty
Class ComponentNode

java.lang.Object
  |
  +--sjm.examples.pretty.ComponentNode

Direct Known Subclasses:

CompositeNode, TerminalNode

public abstract class ComponentNode

extends java.lang.Object

This class tops a hierarchy that implements the Composite pattern. The two subclasses are CompositeNode and TerminalNode. A composite node contains other nodes, which can be other composites or terminal nodes. A terminal node does not contain other nodes.

Field Summary

protected java.lang.Object

value

Constructor Summary

ComponentNode()

Method Summary

static java.lang.String	indent(int n) Returns a string of blanks.
java.lang.String	toString() Return a textual description of this node.
protected abstract java.lang.String	toString(int n, boolean label, java.util.Vector visited)
java.lang.String	toStringWithoutLabels() Return a textual description of this node without showing composite values.

Methods inherited from class java.lang.Object

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

Field Detail

value

protected java.lang.Object value

Constructor Detail

ComponentNode

public ComponentNode()

Method Detail

indent

public static java.lang.String indent(int n)

Returns a string of blanks.

Returns:

a string of blanks

toString

public java.lang.String toString()

Return a textual description of this node.

Overrides:

toString in class java.lang.Object

Returns:

a textual description of this node

toString

protected abstract java.lang.String toString(int n,
                                             boolean label,
                                             java.util.Vector visited)

toStringWithoutLabels

public java.lang.String toStringWithoutLabels()

Return a textual description of this node without showing composite values. This is useful if the presence of a composite is clear just from the indenting in the display string. The class ShowDangle gives an example.

Returns:

a textual description of this node, omitting composite values