119 lines
2.5 KiB
Java
119 lines
2.5 KiB
Java
/*
|
|
|
|
Copyright 2006 Rene Grothmann, modified by Eric Hakenholz
|
|
|
|
This file is part of C.a.R. software.
|
|
|
|
C.a.R. is a free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, version 3 of the License.
|
|
|
|
C.a.R. is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
*/
|
|
|
|
|
|
package rene.util.list;
|
|
|
|
/**
|
|
* A node with a list of children trees.
|
|
*/
|
|
|
|
public class Tree {
|
|
ListClass Children; // list of children, each with Tree as content
|
|
Object Content; // content
|
|
ListElement Le; // the listelement containing the tree
|
|
Tree Parent; // the parent tree
|
|
|
|
/** initialize with an object and no children */
|
|
public Tree(final Object o) {
|
|
Content = o;
|
|
Children = new ListClass();
|
|
Le = null;
|
|
Parent = null;
|
|
}
|
|
|
|
/** add a child tree */
|
|
public void addchild(final Tree t) {
|
|
final ListElement p = new ListElement(t);
|
|
Children.append(p);
|
|
t.Le = p;
|
|
t.Parent = this;
|
|
}
|
|
|
|
/** insert a child tree */
|
|
public void insertchild(final Tree t) {
|
|
if (!haschildren()) // simple case
|
|
{
|
|
addchild(t);
|
|
return;
|
|
}
|
|
// give t my children
|
|
t.Children = Children;
|
|
// make t my only child
|
|
Children = new ListClass();
|
|
final ListElement p = new ListElement(t);
|
|
Children.append(p);
|
|
t.Le = p;
|
|
t.Parent = this;
|
|
// fix the parents of all grandchildren
|
|
ListElement le = t.Children.first();
|
|
while (le != null) {
|
|
final Tree h = (Tree) (le.content());
|
|
h.Parent = t;
|
|
le = le.next();
|
|
}
|
|
}
|
|
|
|
/** remove the specific child tree (must be in the tree!!!) */
|
|
public void remove(final Tree t) {
|
|
if (t.parent() != this)
|
|
return;
|
|
Children.remove(t.Le);
|
|
}
|
|
|
|
/** remove all children */
|
|
public void removeall() {
|
|
Children.removeall();
|
|
}
|
|
|
|
// Access Methods:
|
|
public boolean haschildren() {
|
|
return Children.first() != null;
|
|
}
|
|
|
|
public Tree firstchild() {
|
|
return (Tree) Children.first().content();
|
|
}
|
|
|
|
public Tree lastchild() {
|
|
return (Tree) Children.last().content();
|
|
}
|
|
|
|
public Tree parent() {
|
|
return Parent;
|
|
}
|
|
|
|
public ListClass children() {
|
|
return Children;
|
|
}
|
|
|
|
public Object content() {
|
|
return Content;
|
|
}
|
|
|
|
public void content(final Object o) {
|
|
Content = o;
|
|
}
|
|
|
|
public ListElement listelement() {
|
|
return Le;
|
|
}
|
|
}
|