org.jdom

Interface Parent

All Superinterfaces:
Cloneable, Serializable
Known Implementing Classes:
Document, Element

public interface Parent
extends Cloneable, Serializable

Superclass for JDOM objects which are allowed to contain Content content.
Version:
$Revision: 1.12 $, $Date: 2004/08/31 21:47:51 $
Authors:
Bradley S. Huffman
Jason Hunter
See Also:
Content, Document, Element

Method Summary

Object
clone()
Obtain a deep, unattached copy of this parent and it's children.
List
cloneContent()
Returns a list containing detached clones of this parent's content list.
List
getContent()
Returns the full content of this parent as a List which contains objects of type Content.
Content
getContent(int index)
Returns the child at the given index.
List
getContent(Filter filter)
Returns as a List the content of this parent that matches the supplied filter.
int
getContentSize()
Returns the number of children in this parent's content list.
Iterator
getDescendants()
Returns an Iterator that walks over all descendants in document order.
Iterator
getDescendants(Filter filter)
Returns an Iterator that walks over all descendants in document order applying the Filter to return only elements that match the filter rule.
Document
getDocument()
Return this parent's owning document or null if the branch containing this parent is currently not attached to a document.
Parent
getParent()
Return this parent's parent, or null if this parent is currently not attached to another parent.
int
indexOf(Content child)
Returns the index of the supplied child in the content list, or -1 if not a child of this parent.
List
removeContent()
Removes all content from this parent and returns the detached children.
Content
removeContent(int index)
Removes and returns the child at the given index, or returns null if there's no such child.
boolean
removeContent(Content child)
Removes a single child node from the content list.
List
removeContent(Filter filter)
Removes from this parent all child content matching the given filter and returns a list of the detached children.

Method Details

clone

public Object clone()
Obtain a deep, unattached copy of this parent and it's children.
Returns:
a deep copy of this parent and it's children.

cloneContent

public List cloneContent()
Returns a list containing detached clones of this parent's content list.
Returns:
list of cloned child content

getContent

public List getContent()
Returns the full content of this parent as a List which contains objects of type Content. The returned list is "live" and in document order. Any modifications to it affect the element's actual contents. Modifications are checked for conformance to XML 1.0 rules.

Sequential traversal through the List is best done with an Iterator since the underlying implement of List.size may require walking the entire list and indexed lookups may require starting at the beginning each time.

Returns:
a list of the content of the parent

getContent

public Content getContent(int index)
Returns the child at the given index.
Parameters:
index - location of desired child
Returns:
child at the given index

getContent

public List getContent(Filter filter)
Returns as a List the content of this parent that matches the supplied filter. The returned list is "live" and in document order. Any modifications to it affect the element's actual contents. Modifications are checked for conformance to XML 1.0 rules.

Sequential traversal through the List is best done with an Iterator since the underlying implement of List.size may require walking the entire list and indexed lookups may require starting at the beginning each time.

Parameters:
filter - filter to apply
Returns:
a list of the content of the parent matching the filter

getContentSize

public int getContentSize()
Returns:
number of children

getDescendants

public Iterator getDescendants()
Returns an Iterator that walks over all descendants in document order.
Returns:
an iterator to walk descendants

getDescendants

public Iterator getDescendants(Filter filter)
Returns an Iterator that walks over all descendants in document order applying the Filter to return only elements that match the filter rule. With filters you can match only Elements, only Comments, Elements or Comments, only Elements with a given name and/or prefix, and so on.
Parameters:
filter - filter to select which descendants to see
Returns:
an iterator to walk descendants that match a filter

getDocument

public Document getDocument()
Return this parent's owning document or null if the branch containing this parent is currently not attached to a document.
Returns:
this child's owning document or null if none

getParent

public Parent getParent()
Return this parent's parent, or null if this parent is currently not attached to another parent. This is the same method as in Content but also added to Parent to allow more easy up-the-tree walking.
Returns:
this parent's parent or null if none

indexOf

public int indexOf(Content child)
Returns the index of the supplied child in the content list, or -1 if not a child of this parent.
Parameters:
child - child to search for
Returns:
index of child, or -1 if not found

removeContent

public List removeContent()
Removes all content from this parent and returns the detached children.
Returns:
list of the old content detached from this parent

removeContent

public Content removeContent(int index)
Removes and returns the child at the given index, or returns null if there's no such child.
Parameters:
index - index of child to remove
Returns:
detached child at given index or null if no

removeContent

public boolean removeContent(Content child)
Removes a single child node from the content list.
Parameters:
child - child to remove
Returns:
whether the removal occurred

removeContent

public List removeContent(Filter filter)
Removes from this parent all child content matching the given filter and returns a list of the detached children.
Parameters:
filter - filter to apply
Returns:
list of the detached children matching the filter

Copyright B) 2004 Jason Hunter, Brett McLaughlin. All Rights Reserved.