com.imagero.swing.tree.util
Class DMNodeComparator

java.lang.Object
  com.imagero.swing.tree.util.DMNodeComparator

All Implemented Interfaces:

java.util.Comparator, TreeNodeComparator

Direct Known Subclasses:

FileNodeComparator, HTTPNodeComparator, URLNodeComparator

public class DMNodeComparator

extends java.lang.Object

implements TreeNodeComparator

since this comparator knows nothing about userObjects in nodes, it makes only simple check for null values and (if needed) directory check. subclasses should call super.compare() and if result is UNDEFINED make further comparison

Field Summary

protected boolean	directoriesFirst
static int	UNDEFINED

Constructor Summary

DMNodeComparator()

Method Summary

protected int	checkDirectory(javax.swing.tree.TreeNode tn1, javax.swing.tree.TreeNode tn2) check if some of nodes is directory
protected int	checkNull(javax.swing.tree.TreeNode tn1, javax.swing.tree.TreeNode tn2) check null nodes
int	compare(HTreeNode tn1, HTreeNode tn2)
int	compare(java.lang.Object o1, java.lang.Object o2)
boolean	equals(java.lang.Object o)
boolean	isDirectoriesFirst()
void	setDirectoriesFirst(boolean b)

Methods inherited from class java.lang.Object

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

Field Detail

UNDEFINED

public static final int UNDEFINED

See Also:

Constant Field Values

directoriesFirst

protected boolean directoriesFirst

Constructor Detail

DMNodeComparator

public DMNodeComparator()

Method Detail

isDirectoriesFirst

public boolean isDirectoriesFirst()

setDirectoriesFirst

public void setDirectoriesFirst(boolean b)

equals

public boolean equals(java.lang.Object o)

Specified by:

equals in interface java.util.Comparator

compare

public int compare(java.lang.Object o1,
                   java.lang.Object o2)

Specified by:

compare in interface java.util.Comparator

compare

public int compare(HTreeNode tn1,
                   HTreeNode tn2)

Specified by:

compare in interface TreeNodeComparator

Parameters:

tn1 - first node

tn2 - second node

Returns:

UNDEFINED if compare result is unknown

checkNull

protected int checkNull(javax.swing.tree.TreeNode tn1,
                        javax.swing.tree.TreeNode tn2)

check null nodes

Parameters:

tn1 - first node

tn2 - second node

Returns:

0 if both nodes are null, 1 if first node is not null and second node is null, -1 if fist node is null and second node is not null, -2 id both nodes are not null;

checkDirectory

protected int checkDirectory(javax.swing.tree.TreeNode tn1,
                             javax.swing.tree.TreeNode tn2)

check if some of nodes is directory

Parameters:

tn1 - first node

tn2 - second node

Returns:

-1 if first node is directory and second node is not directory, 1 if first node is not directory and second node node is directory, UNDEFINED if both nodes are directories or not;