org.cip4.jdflib.elementwalker
Class BaseWalker

java.lang.Object
  org.cip4.jdflib.elementwalker.BaseWalker

All Implemented Interfaces:

Comparable<BaseWalker>, IWalker

Direct Known Subclasses:

AttributeReplacer.WalkDefault, EnsureElementUri.WalkElement, EnsureNSUri.WalkElement, FixVersion.WalkElement, IDFinder.WalkResource, IDFinder.WalkSet, LinkRefFinder.WalkRef, RemoveEmpty.WalkElement, RemovePrivate.WalkElement, ResourceIDFinder.WalkStop, SizeWalker.WalkElement, UnLinkFinder.WalkRef, UnLinkFinder.WalkRes, URLExtractor.WalkElement, URLMapper.WalkElement, XJDF20.WalkElement, XJDFSchemaCreator.WalkElement, XJDFSchemaWalker.WalkElement, XJDFToJDFConverter.WalkXElement, XPathWalker.WalkAll

public class BaseWalker
extends Object
implements IWalker, Comparable<BaseWalker>

Author:

Rainer Prosi, Heidelberger Druckmaschinen

Field Summary

protected int	depth
protected org.apache.commons.logging.Log	log

Constructor Summary

BaseWalker(BaseWalkerFactory factory)

Method Summary

int	compareTo(BaseWalker arg0) note the reverse order - high depth means up in list so that abstract classes get checked later (non-Javadoc)
void	finalizeWalk(KElement e, KElement trackElem) hook for guaranteed postwalk finalization
int	getDepth()
boolean	matches(KElement e) this is the check whether or not to use this walker for a given element should be overwritten
void	prepareWalk(KElement e, KElement trackElem) hook for guaranteed prewalk initialization
String	toString()
KElement	walk(KElement e, KElement trackElem) the mother routine for walking....

Methods inherited from class java.lang.Object

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

Field Detail

depth

protected int depth

log

protected final org.apache.commons.logging.Log log

Constructor Detail

BaseWalker

public BaseWalker(BaseWalkerFactory factory)

Parameters:

factory -

Method Detail

walk

public KElement walk(KElement e,
                     KElement trackElem)

the mother routine for walking....

Specified by:

walk in interface IWalker

Parameters:

e - the element to walk

trackElem - a parallel element to e that may additionally be modified during the walk

Returns:

!=null if this element remains after walking,
null if it was deleted and therefore the walker should skip this and all its descendants
the element may either be trackElem or a converted element to continue with as trackElem

See Also:

IWalker.walk(KElement, KElement)

prepareWalk

public void prepareWalk(KElement e,
                        KElement trackElem)

hook for guaranteed prewalk initialization

Specified by:

prepareWalk in interface IWalker

Parameters:

e -

trackElem -

finalizeWalk

public void finalizeWalk(KElement e,
                         KElement trackElem)

hook for guaranteed postwalk finalization

Specified by:

finalizeWalk in interface IWalker

Parameters:

e -

trackElem -

matches

public boolean matches(KElement e)

this is the check whether or not to use this walker for a given element should be overwritten

Parameters:

e - the element to check

Returns:

true if matches - must be true for base

getDepth

public int getDepth()

Returns:

the class hierarchy depth

compareTo

public int compareTo(BaseWalker arg0)

note the reverse order - high depth means up in list so that abstract classes get checked later (non-Javadoc)

Specified by:

compareTo in interface Comparable<BaseWalker>

Parameters:

arg0 - the other Basewalker

Returns:

int

See Also:

Comparable.compareTo(java.lang.Object)

toString

public String toString()

Overrides:

toString in class Object

Returns:

the string

See Also:

Object.toString()