nu.xom

Class Document

Object

nu.xom.Node

nu.xom.ParentNode

nu.xom.Document

public class Document
extends ParentNode

The Document class represents a complete XML document including its root element, prolog, and epilog.

Version:

1.3.0

Author:

Elliotte Rusty Harold

Constructor Summary

Constructors

Constructor and Description
Document(Document doc) Creates a copy of this document.
Document(Element root) Creates a new Document object with the specified root element.

Method Summary

Modifier and Type	Method and Description
Document	copy() Returns a complete copy of this document.
String	getBaseURI() Returns the absolute URI from which this document was loaded.
DocType	getDocType() Returns this document's document type declaration, or null if it doesn't have one.
Element	getRootElement() Returns this document's root element.
String	getValue() Returns the value of the document as defined by XPath 1.0.
Node	removeChild(int position) Removes the child of this document at the specified position.
Node	removeChild(Node child) Removes the specified child from this document.
void	replaceChild(Node oldChild, Node newChild) Replaces an existing child with a new child node.
void	setBaseURI(String URI) Sets the URI from which this document was loaded, and against which relative URLs in this document will be resolved.
void	setDocType(DocType doctype) Sets this document's document type declaration.
void	setRootElement(Element root) Replaces the current root element with a different root element.
String	toString() Returns a string representation of this document suitable for debugging and diagnosis.
String	toXML() Returns the actual complete, well-formed XML document as a String.

Methods inherited from class nu.xom.ParentNode

appendChild, getChild, getChildCount, indexOf, insertChild

Methods inherited from class nu.xom.Node

detach, equals, getDocument, getParent, hashCode, query, query

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Document

public Document(Element root)

Creates a new Document object with the specified root element.

Parameters:

root - the root element of this document

Throws:

NullPointerException - if root is null

MultipleParentException - if root already has a parent

Document

public Document(Document doc)

Creates a copy of this document.

Parameters:

doc - the document to copy

Throws:

NullPointerException - if doc is null

Method Detail

getDocType

public final DocType getDocType()

Returns this document's document type declaration, or null if it doesn't have one.

Returns:

the document type declaration

See Also:

setDocType(nu.xom.DocType)

setDocType

public void setDocType(DocType doctype)

Sets this document's document type declaration. If this document already has a document type declaration, then it's inserted at that position. Otherwise, it's inserted at the beginning of the document.

Parameters:

doctype - the document type declaration

Throws:

MultipleParentException - if doctype belongs to another document

NullPointerException - if doctype is null

getRootElement

public final Element getRootElement()

Returns this document's root element. This is guaranteed to be non-null.

Returns:

the root element

setRootElement

public void setRootElement(Element root)

Replaces the current root element with a different root element.

Parameters:

root - the new root element

Throws:

MultipleParentException - if root has a parent

NullPointerException - if root is null

setBaseURI

public void setBaseURI(String URI)

Sets the URI from which this document was loaded, and against which relative URLs in this document will be resolved. Setting the base URI to null or the empty string removes any existing base URI.

Specified by:

setBaseURI in class ParentNode

Parameters:

URI - the base URI of this document

Throws:

MalformedURIException - if URI is not a legal absolute URI

getBaseURI

public final String getBaseURI()

Returns the absolute URI from which this document was loaded. This method returns the empty string if the base URI is not known; for instance if the document was created in memory with a constructor rather than by parsing an existing document.

Overrides:

getBaseURI in class Node

Returns:

the base URI of this document

removeChild

public Node removeChild(int position)

Removes the child of this document at the specified position. Indexes begin at 0 and count up to one less than the number of children of this document. The root element cannot be removed. Instead, use setRootElement to replace the existing root element with a different element.

Overrides:

removeChild in class ParentNode

Parameters:

position - index of the node to remove

Returns:

the node which was removed

Throws:

IndexOutOfBoundsException - if the index is negative or greater than the number of children of this document - 1

WellformednessException - if the index points to the root element

removeChild

public Node removeChild(Node child)

Removes the specified child from this document. The root element cannot be removed. Instead, use setRootElement to replace the existing root element with a different element.

Overrides:

removeChild in class ParentNode

Parameters:

child - node to remove

Returns:

the node which was removed

Throws:

NoSuchChildException - if the node is not a child of this node

WellformednessException - if child is the root element

replaceChild

public void replaceChild(Node oldChild,
                         Node newChild)

Replaces an existing child with a new child node. If oldChild is not a child of this node, then a NoSuchChildException is thrown. The root element can only be replaced by another element.

Overrides:

replaceChild in class ParentNode

Parameters:

oldChild - the node removed from the tree

newChild - the node inserted into the tree

Throws:

MultipleParentException - if newChild already has a parent

NoSuchChildException - if oldChild is not a child of this node

NullPointerException - if either argument is null

IllegalAddException - if newChild is an attribute or a text node

WellformednessException - if newChild oldChild is an element and newChild is not

getValue

public final String getValue()

Returns the value of the document as defined by XPath 1.0. This is the same as the value of the root element, which is the complete PCDATA content of the root element, without any tags, comments, or processing instructions after all entity and character references have been resolved.

Specified by:

getValue in class Node

Returns:

value of the root element of this document

toXML

public final String toXML()

Returns the actual complete, well-formed XML document as a String. Significant white space is preserved. Insignificant white space in tags, the prolog, the epilog, and the internal DTD subset is not preserved. Entity and character references are not preserved. The entire document is contained in this one string.

Specified by:

toXML in class Node

Returns:

a string containing this entire XML document

copy

public Document copy()

Returns a complete copy of this document.

Specified by:

copy in class Node

Returns:

a deep copy of this Document object

toString

public final String toString()

Returns a string representation of this document suitable for debugging and diagnosis. This is not the XML representation of this document.

Overrides:

toString in class Object

Returns:

a non-XML string representation of this document