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org.dom4j.tree
Class AbstractDocument

java.lang.Object
  extended byorg.dom4j.tree.AbstractNode
      extended byorg.dom4j.tree.AbstractBranch
          extended byorg.dom4j.tree.AbstractDocument
All Implemented Interfaces:
Branch, Cloneable, Document, Node, Serializable
Direct Known Subclasses:
DefaultDocument
public abstract class AbstractDocument
extends AbstractBranch
implements Document

AbstractDocument is an abstract base class for tree implementors to use for implementation inheritence.

Version:
$Revision: 1.33 $
Author:
James Strachan
See Also:
Serialized Form

Field Summary
protected  String encoding
          The encoding of this document as stated in the XML declaration
 
Fields inherited from class org.dom4j.tree.AbstractBranch
DEFAULT_CONTENT_LIST_SIZE
 
Fields inherited from class org.dom4j.tree.AbstractNode
NODE_TYPE_NAMES
 
Fields inherited from interface org.dom4j.Node
ANY_NODE, ATTRIBUTE_NODE, CDATA_SECTION_NODE, COMMENT_NODE, DOCUMENT_NODE, DOCUMENT_TYPE_NODE, ELEMENT_NODE, ENTITY_REFERENCE_NODE, MAX_NODE_TYPE, NAMESPACE_NODE, PROCESSING_INSTRUCTION_NODE, TEXT_NODE, UNKNOWN_NODE
 
Constructor Summary
AbstractDocument()
           
 
Method Summary
 void accept(Visitor visitor)
           accept method is the Visitor Pattern method.
 void add(Element element)
          Adds the given Element to this branch.
 Document addComment(String comment)
          Adds a new Comment node with the given text to this branch.
 Element addElement(QName qName)
          Adds a new Element node with the given QNameto this branch and returns a reference to the new node.
 Element addElement(String name)
          Adds a new Element node with the given name to this branch and returns a reference to the new node.
 Element addElement(String qualifiedName, String namespaceURI)
          Adds a new Element node with the given qualified name and namespace URI to this branch and returns a reference to the new node.
 Document addProcessingInstruction(String target, Map data)
          Adds a processing instruction for the given target
 Document addProcessingInstruction(String target, String data)
          Adds a processing instruction for the given target
 String asXML()
           asXML returns the textual XML representation of this node.
 Node asXPathResult(Element parent)
           asXPathResult returns a version of this node which is capable of being an XPath result.
protected  void checkAddElementAllowed(Element element)
           
protected  void childAdded(Node node)
          Called when a new child node has been added to me to allow any parent relationships to be created or events to be fired.
protected  void childRemoved(Node node)
          Called when a child node has been removed to allow any parent relationships to be deleted or events to be fired.
 Document getDocument()
           getDocument returns the Document that this Node is part of if this node supports the parent relationship.
 short getNodeType()
          Returns the code according to the type of node.
 String getPath(Element context)
          Returns the relative XPath expression which will return a node set containing the given node such as a/b/@c.
 String getStringValue()
          Returns the XPath string-value of this node.
 String getUniquePath(Element context)
           Returns the relative unique XPath expression from the given context which will return a nodeset of one node which is the current node.
 String getXMLEncoding()
          Return the encoding of this document, as part of the XML declaration This is null when unspecified or when it is not known (such as when the Document was created in memory) or when the implementation does not support this operation.
 void normalize()
          Puts all Text nodes in the full depth of the sub-tree underneath this Node, including attribute nodes, into a "normal" form where only structure (e.g., elements, comments, processing instructions, CDATA sections, and entity references) separates Text nodes, i.e., there are neither adjacent Text nodes nor empty Text nodes.
 boolean remove(Element element)
          Removes the given Element if the node is an immediate child of this branch.
protected abstract  void rootElementAdded(Element rootElement)
          Called to set the root element variable
 void setRootElement(Element rootElement)
          Sets the root element for this document
 void setXMLEncoding(String enc)
          Sets the encoding of this document as it will appear in the XML declaration part of the document.
 String toString()
           
 void write(Writer out)
           write writes this node as the default XML notation for this node.
 
Methods inherited from class org.dom4j.tree.AbstractBranch
add, add, add, addElement, addNode, addNode, appendContent, content, contentList, contentRemoved, createContentList, createContentList, createEmptyList, createResultList, createSingleResultList, elementByID, elementID, getContentAsStringValue, getContentAsText, getText, getTextTrim, hasContent, indexOf, invalidNodeTypeAddException, isReadOnly, node, nodeCount, nodeIterator, remove, remove, remove, removeNode, setProcessingInstructions
 
Methods inherited from class org.dom4j.tree.AbstractNode
clone, createPattern, createXPath, createXPathFilter, createXPathResult, detach, getDocumentFactory, getName, getNodeTypeName, getParent, getPath, getUniquePath, matches, numberValueOf, selectNodes, selectNodes, selectNodes, selectObject, selectSingleNode, setDocument, setName, setParent, setText, supportsParent, valueOf
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface org.dom4j.Document
addDocType, getDocType, getEntityResolver, getRootElement, setDocType, setEntityResolver
 
Methods inherited from interface org.dom4j.Branch
add, add, add, appendContent, clearContent, content, elementByID, indexOf, node, nodeCount, nodeIterator, processingInstruction, processingInstructions, processingInstructions, remove, remove, remove, removeProcessingInstruction, setContent, setProcessingInstructions
 
Methods inherited from interface org.dom4j.Node
clone, createXPath, detach, getName, getNodeTypeName, getParent, getPath, getText, getUniquePath, hasContent, isReadOnly, matches, numberValueOf, selectNodes, selectNodes, selectNodes, selectObject, selectSingleNode, setDocument, setName, setParent, setText, supportsParent, valueOf
 

Field Detail

encoding

protected String encoding
The encoding of this document as stated in the XML declaration

Constructor Detail

AbstractDocument

public AbstractDocument()
Method Detail

getNodeType

public short getNodeType()
Description copied from interface: Node
Returns the code according to the type of node. This makes processing nodes polymorphically much easier as the switch statement can be used instead of multiple if (instanceof) statements.

Specified by:
getNodeType in interface Node
Overrides:
getNodeType in class AbstractNode

getPath

public String getPath(Element context)
Description copied from interface: Node
Returns the relative XPath expression which will return a node set containing the given node such as a/b/@c. No indexing will be used to restrict the path if multiple elements with the same name occur on the path.

Specified by:
getPath in interface Node
Parameters:
context - is the parent context from which the relative path should start. If the context is null or the context is not an ancestor of this node then the path will be absolute and start from the document and so begin with the '/' character.
Returns:
the XPath expression relative to the given context which will return a nodeset containing at least this node.

getUniquePath

public String getUniquePath(Element context)
Description copied from interface: Node

Returns the relative unique XPath expression from the given context which will return a nodeset of one node which is the current node. This method will use the XPath index operator to restrict the path if multiple elements with the same name occur on the path.

Specified by:
getUniquePath in interface Node
Parameters:
context - is the parent context from which the path should start. If the context is null or the context is not an ancestor of this node then the path will start from the document and so begin with the '/' character.
Returns:
the XPath expression relative to the given context which will return a nodeset containing just this node.

getDocument

public Document getDocument()
Description copied from interface: Node

getDocument returns the Document that this Node is part of if this node supports the parent relationship.

This method is an optional feature and may not be supported for all Node implementations.

Specified by:
getDocument in interface Node
Overrides:
getDocument in class AbstractNode

getXMLEncoding

public String getXMLEncoding()
Description copied from interface: Document
Return the encoding of this document, as part of the XML declaration This is null when unspecified or when it is not known (such as when the Document was created in memory) or when the implementation does not support this operation.

The way this encoding is retrieved also depends on the way the XML source is parsed. For instance, if the SAXReader is used and if the underlying XMLReader implementation support the org.xml.sax.ext.Locator2 interface, the result returned by this method is specified by the getEncoding() method of that interface.

Specified by:
getXMLEncoding in interface Document
Returns:
The encoding of this document, as stated in the XML declaration, or null if unknown.

getStringValue

public String getStringValue()
Description copied from interface: Node
Returns the XPath string-value of this node. The behaviour of this method is defined in the XPath specification .

Specified by:
getStringValue in interface Node
Overrides:
getStringValue in class AbstractNode

asXML

public String asXML()
Description copied from interface: Node

asXML returns the textual XML representation of this node.

Specified by:
asXML in interface Node
Returns:
the XML representation of this node

write

public void write(Writer out)
           throws IOException
Description copied from interface: Node

write writes this node as the default XML notation for this node. If you wish to control the XML output (such as for pretty printing, changing the indentation policy etc.) then please use XMLWriter or its derivations.

Specified by:
write in interface Node
Overrides:
write in class AbstractNode
Throws:
IOException

accept

public void accept(Visitor visitor)

accept method is the Visitor Pattern method.

Specified by:
accept in interface Node
Parameters:
visitor - Visitor is the visitor.

toString

public String toString()

normalize

public void normalize()
Description copied from interface: Branch
Puts all Text nodes in the full depth of the sub-tree underneath this Node, including attribute nodes, into a "normal" form where only structure (e.g., elements, comments, processing instructions, CDATA sections, and entity references) separates Text nodes, i.e., there are neither adjacent Text nodes nor empty Text nodes. This can be used to ensure that the DOM view of a document is the same as if it were saved and re-loaded, and is useful when operations (such as XPointer lookups) that depend on a particular document tree structure are to be used.In cases where the document contains CDATASections, the normalize operation alone may not be sufficient, since XPointers do not differentiate between Text nodes and CDATASection nodes.

Specified by:
normalize in interface Branch

addComment

public Document addComment(String comment)
Description copied from interface: Document
Adds a new Comment node with the given text to this branch.

Specified by:
addComment in interface Document
Parameters:
comment - is the text for the Comment node.
Returns:
this Document instance.

addProcessingInstruction

public Document addProcessingInstruction(String target,
                                         String data)
Description copied from interface: Document
Adds a processing instruction for the given target

Specified by:
addProcessingInstruction in interface Document
Parameters:
target - is the target of the processing instruction
data - is the textual data (key/value pairs) of the processing instruction
Returns:
this Document instance.

addProcessingInstruction

public Document addProcessingInstruction(String target,
                                         Map data)
Description copied from interface: Document
Adds a processing instruction for the given target

Specified by:
addProcessingInstruction in interface Document
Parameters:
target - is the target of the processing instruction
data - is a Map of the key / value pairs of the processing instruction
Returns:
this Document instance.

addElement

public Element addElement(String name)
Description copied from interface: Branch
Adds a new Element node with the given name to this branch and returns a reference to the new node.

Specified by:
addElement in interface Branch
Overrides:
addElement in class AbstractBranch

addElement

public Element addElement(String qualifiedName,
                          String namespaceURI)
Description copied from interface: Branch
Adds a new Element node with the given qualified name and namespace URI to this branch and returns a reference to the new node.

Specified by:
addElement in interface Branch
Overrides:
addElement in class AbstractBranch

addElement

public Element addElement(QName qName)
Description copied from interface: Branch
Adds a new Element node with the given QNameto this branch and returns a reference to the new node.

Specified by:
addElement in interface Branch
Overrides:
addElement in class AbstractBranch

setRootElement

public void setRootElement(Element rootElement)
Description copied from interface: Document
Sets the root element for this document

Specified by:
setRootElement in interface Document
Parameters:
rootElement - the new root element for this document

add

public void add(Element element)
Description copied from interface: Branch
Adds the given Element to this branch. If the given node already has a parent defined then an IllegalAddException will be thrown.

Specified by:
add in interface Branch
Overrides:
add in class AbstractBranch

remove

public boolean remove(Element element)
Description copied from interface: Branch
Removes the given Element if the node is an immediate child of this branch. If the given node is not an immediate child of this branch then the Node.detach()method should be used instead.

Specified by:
remove in interface Branch
Overrides:
remove in class AbstractBranch

asXPathResult

public Node asXPathResult(Element parent)
Description copied from interface: Node

asXPathResult returns a version of this node which is capable of being an XPath result. The result of an XPath expression should always support the parent relationship, whether the original XML tree was singly or doubly linked. If the node does not support the parent relationship then a new node will be created which is linked to its parent and returned.

Specified by:
asXPathResult in interface Node
Overrides:
asXPathResult in class AbstractNode

childAdded

protected void childAdded(Node node)
Description copied from class: AbstractBranch
Called when a new child node has been added to me to allow any parent relationships to be created or events to be fired.

Specified by:
childAdded in class AbstractBranch
Parameters:
node - DOCUMENT ME!

childRemoved

protected void childRemoved(Node node)
Description copied from class: AbstractBranch
Called when a child node has been removed to allow any parent relationships to be deleted or events to be fired.

Specified by:
childRemoved in class AbstractBranch
Parameters:
node - DOCUMENT ME!

checkAddElementAllowed

protected void checkAddElementAllowed(Element element)

rootElementAdded

protected abstract void rootElementAdded(Element rootElement)
Called to set the root element variable

Parameters:
rootElement - DOCUMENT ME!

setXMLEncoding

public void setXMLEncoding(String enc)
Description copied from interface: Document
Sets the encoding of this document as it will appear in the XML declaration part of the document.

Specified by:
setXMLEncoding in interface Document
Parameters:
enc - the encoding of the document
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