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org.dom4j.io
Class SAXEventRecorder

java.lang.Objectorg.xml.sax.helpers.DefaultHandler
org.dom4j.io.SAXEventRecorder
- All Implemented Interfaces:
- org.xml.sax.ContentHandler, org.xml.sax.ext.DeclHandler, org.xml.sax.DTDHandler, org.xml.sax.EntityResolver, org.xml.sax.ErrorHandler, java.io.Externalizable, org.xml.sax.ext.LexicalHandler, java.io.Serializable
- public class SAXEventRecorder
- extends org.xml.sax.helpers.DefaultHandler
- implements org.xml.sax.ext.LexicalHandler, org.xml.sax.ext.DeclHandler, org.xml.sax.DTDHandler, java.io.Externalizable
- extends org.xml.sax.helpers.DefaultHandler
Records SAX events such that they may be "replayed" at a later time. Provides an alternative serialization approach when externalizing a DOM4J document. Rather than serializing a document as text and re-parsing, the sax events may be serialized instead.
Example usage:
SAXEventRecorder recorder = new SAXEventRecorder();
SAXWriter saxWriter = new SAXWriter(recorder, recorder);
saxWriter.write(document);
out.writeObject(recorder);
...
SAXEventRecorder recorder = (SAXEventRecorder)in.readObject();
SAXContentHandler saxContentHandler = new SAXContentHandler();
recorder.replay(saxContentHandler);
Document document = saxContentHandler.getDocument();
| Nested Class Summary | |
(package private) static class |
SAXEventRecorder.SAXEvent
|
| Field Summary | |
private static java.lang.String |
EMPTY_STRING
|
private java.util.List |
events
|
private static byte |
NULL
|
private static byte |
OBJECT
|
private java.util.Map |
prefixMappings
|
static long |
serialVersionUID
|
private static byte |
STRING
|
private static java.lang.String |
XMLNS
|
| Constructor Summary | |
SAXEventRecorder()
|
|
| Method Summary | |
void |
attributeDecl(java.lang.String eName,
java.lang.String aName,
java.lang.String type,
java.lang.String valueDefault,
java.lang.String value)
Report an attribute type declaration. |
void |
characters(char[] ch,
int start,
int end)
Receive notification of character data inside an element. |
void |
comment(char[] ch,
int start,
int end)
Report an XML comment anywhere in the document. |
void |
elementDecl(java.lang.String name,
java.lang.String model)
Report an element type declaration. |
void |
endCDATA()
Report the end of a CDATA section. |
void |
endDocument()
Receive notification of the end of the document. |
void |
endDTD()
Report the end of DTD declarations. |
void |
endElement(java.lang.String namespaceURI,
java.lang.String localName,
java.lang.String qName)
Receive notification of the end of an element. |
void |
endEntity(java.lang.String name)
Report the end of an entity. |
void |
endPrefixMapping(java.lang.String prefix)
Receive notification of the end of a Namespace mapping. |
void |
externalEntityDecl(java.lang.String name,
java.lang.String publicId,
java.lang.String sysId)
Report a parsed external entity declaration. |
void |
internalEntityDecl(java.lang.String name,
java.lang.String value)
Report an internal entity declaration. |
void |
processingInstruction(java.lang.String target,
java.lang.String data)
Receive notification of a processing instruction. |
void |
readExternal(java.io.ObjectInput in)
This method restores an object's state by reading in the instance data for the object from the passed in stream. |
void |
replay(org.xml.sax.ContentHandler handler)
|
void |
startCDATA()
Report the start of a CDATA section. |
void |
startDocument()
Receive notification of the beginning of the document. |
void |
startDTD(java.lang.String name,
java.lang.String publicId,
java.lang.String systemId)
Report the start of DTD declarations, if any. |
void |
startElement(java.lang.String namespaceURI,
java.lang.String localName,
java.lang.String qualifiedName,
org.xml.sax.Attributes attributes)
Receive notification of the start of an element. |
void |
startEntity(java.lang.String name)
Report the beginning of some internal and external XML entities. |
void |
startPrefixMapping(java.lang.String prefix,
java.lang.String uri)
Receive notification of the start of a Namespace mapping. |
void |
writeExternal(java.io.ObjectOutput out)
This method is responsible for writing the instance data of an object to the passed in stream. |
| Methods inherited from class org.xml.sax.helpers.DefaultHandler |
error, fatalError, ignorableWhitespace, notationDecl, resolveEntity, setDocumentLocator, skippedEntity, unparsedEntityDecl, warning |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Methods inherited from interface org.xml.sax.DTDHandler |
notationDecl, unparsedEntityDecl |
| Field Detail |
serialVersionUID
public static final long serialVersionUID
- See Also:
- Constant Field Values
STRING
private static final byte STRING
- See Also:
- Constant Field Values
OBJECT
private static final byte OBJECT
- See Also:
- Constant Field Values
NULL
private static final byte NULL
- See Also:
- Constant Field Values
events
private java.util.List events
prefixMappings
private java.util.Map prefixMappings
XMLNS
private static final java.lang.String XMLNS
- See Also:
- Constant Field Values
EMPTY_STRING
private static final java.lang.String EMPTY_STRING
- See Also:
- Constant Field Values
| Constructor Detail |
SAXEventRecorder
public SAXEventRecorder()
| Method Detail |
replay
public void replay(org.xml.sax.ContentHandler handler) throws org.xml.sax.SAXException
processingInstruction
public void processingInstruction(java.lang.String target, java.lang.String data) throws org.xml.sax.SAXException
- Description copied from class:
org.xml.sax.helpers.DefaultHandler - Receive notification of a processing instruction.
By default, do nothing. Application writers may override this method in a subclass to take specific actions for each processing instruction, such as setting status variables or invoking other methods.
- Specified by:
processingInstructionin interfaceorg.xml.sax.ContentHandler
startPrefixMapping
public void startPrefixMapping(java.lang.String prefix, java.lang.String uri) throws org.xml.sax.SAXException
- Description copied from class:
org.xml.sax.helpers.DefaultHandler - Receive notification of the start of a Namespace mapping.
By default, do nothing. Application writers may override this method in a subclass to take specific actions at the start of each Namespace prefix scope (such as storing the prefix mapping).
- Specified by:
startPrefixMappingin interfaceorg.xml.sax.ContentHandler
endPrefixMapping
public void endPrefixMapping(java.lang.String prefix) throws org.xml.sax.SAXException
- Description copied from class:
org.xml.sax.helpers.DefaultHandler - Receive notification of the end of a Namespace mapping.
By default, do nothing. Application writers may override this method in a subclass to take specific actions at the end of each prefix mapping.
- Specified by:
endPrefixMappingin interfaceorg.xml.sax.ContentHandler
startDocument
public void startDocument()
throws org.xml.sax.SAXException
- Description copied from class:
org.xml.sax.helpers.DefaultHandler - Receive notification of the beginning of the document.
By default, do nothing. Application writers may override this method in a subclass to take specific actions at the beginning of a document (such as allocating the root node of a tree or creating an output file).
- Specified by:
startDocumentin interfaceorg.xml.sax.ContentHandler
endDocument
public void endDocument()
throws org.xml.sax.SAXException
- Description copied from class:
org.xml.sax.helpers.DefaultHandler - Receive notification of the end of the document.
By default, do nothing. Application writers may override this method in a subclass to take specific actions at the end of a document (such as finalising a tree or closing an output file).
- Specified by:
endDocumentin interfaceorg.xml.sax.ContentHandler
startElement
public void startElement(java.lang.String namespaceURI, java.lang.String localName, java.lang.String qualifiedName, org.xml.sax.Attributes attributes) throws org.xml.sax.SAXException
- Description copied from class:
org.xml.sax.helpers.DefaultHandler - Receive notification of the start of an element.
By default, do nothing. Application writers may override this method in a subclass to take specific actions at the start of each element (such as allocating a new tree node or writing output to a file).
- Specified by:
startElementin interfaceorg.xml.sax.ContentHandler
endElement
public void endElement(java.lang.String namespaceURI, java.lang.String localName, java.lang.String qName) throws org.xml.sax.SAXException
- Description copied from class:
org.xml.sax.helpers.DefaultHandler - Receive notification of the end of an element.
By default, do nothing. Application writers may override this method in a subclass to take specific actions at the end of each element (such as finalising a tree node or writing output to a file).
- Specified by:
endElementin interfaceorg.xml.sax.ContentHandler
characters
public void characters(char[] ch,
int start,
int end)
throws org.xml.sax.SAXException
- Description copied from class:
org.xml.sax.helpers.DefaultHandler - Receive notification of character data inside an element.
By default, do nothing. Application writers may override this method to take specific actions for each chunk of character data (such as adding the data to a node or buffer, or printing it to a file).
- Specified by:
charactersin interfaceorg.xml.sax.ContentHandler
startDTD
public void startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId) throws org.xml.sax.SAXException
- Description copied from interface:
org.xml.sax.ext.LexicalHandler - Report the start of DTD declarations, if any.
This method is intended to report the beginning of the DOCTYPE declaration; if the document has no DOCTYPE declaration, this method will not be invoked.
All declarations reported through DTDHandler or DeclHandler events must appear between the startDTD and endDTD 55 events. Declarations are assumed to belong to the internal DTD subset unless they appear between startEntity 55 and endEntity 55 events. Comments and processing instructions from the DTD should also be reported between the startDTD and endDTD events, in their original order of (logical) occurrence; they are not required to appear in their correct locations relative to DTDHandler or DeclHandler events, however.
Note that the start/endDTD events will appear within the start/endDocument events from ContentHandler and before the first startElement 55 event.
- Specified by:
startDTDin interfaceorg.xml.sax.ext.LexicalHandler
endDTD
public void endDTD()
throws org.xml.sax.SAXException
- Description copied from interface:
org.xml.sax.ext.LexicalHandler - Report the end of DTD declarations.
This method is intended to report the end of the DOCTYPE declaration; if the document has no DOCTYPE declaration, this method will not be invoked.
- Specified by:
endDTDin interfaceorg.xml.sax.ext.LexicalHandler
startEntity
public void startEntity(java.lang.String name) throws org.xml.sax.SAXException
- Description copied from interface:
org.xml.sax.ext.LexicalHandler - Report the beginning of some internal and external XML entities.
The reporting of parameter entities (including the external DTD subset) is optional, and SAX2 drivers that report LexicalHandler events may not implement it; you can use the
http://xml.org/sax/features/lexical-handler/parameter-entitiesfeature to query or control the reporting of parameter entities.General entities are reported with their regular names, parameter entities have '%' prepended to their names, and the external DTD subset has the pseudo-entity name "[dtd]".
When a SAX2 driver is providing these events, all other events must be properly nested within start/end entity events. There is no additional requirement that events from DeclHandler or DTDHandler be properly ordered.
Note that skipped entities will be reported through the skippedEntity 55 event, which is part of the ContentHandler interface.
Because of the streaming event model that SAX uses, some entity boundaries cannot be reported under any circumstances:
- general entities within attribute values
- parameter entities within declarations
These will be silently expanded, with no indication of where the original entity boundaries were.
Note also that the boundaries of character references (which are not really entities anyway) are not reported.
All start/endEntity events must be properly nested.
- Specified by:
startEntityin interfaceorg.xml.sax.ext.LexicalHandler
endEntity
public void endEntity(java.lang.String name) throws org.xml.sax.SAXException
- Description copied from interface:
org.xml.sax.ext.LexicalHandler - Report the end of an entity.
- Specified by:
endEntityin interfaceorg.xml.sax.ext.LexicalHandler
startCDATA
public void startCDATA()
throws org.xml.sax.SAXException
- Description copied from interface:
org.xml.sax.ext.LexicalHandler - Report the start of a CDATA section.
The contents of the CDATA section will be reported through the regular characters 55 event; this event is intended only to report the boundary.
- Specified by:
startCDATAin interfaceorg.xml.sax.ext.LexicalHandler
endCDATA
public void endCDATA()
throws org.xml.sax.SAXException
- Description copied from interface:
org.xml.sax.ext.LexicalHandler - Report the end of a CDATA section.
- Specified by:
endCDATAin interfaceorg.xml.sax.ext.LexicalHandler
comment
public void comment(char[] ch,
int start,
int end)
throws org.xml.sax.SAXException
- Description copied from interface:
org.xml.sax.ext.LexicalHandler - Report an XML comment anywhere in the document.
This callback will be used for comments inside or outside the document element, including comments in the external DTD subset (if read). Comments in the DTD must be properly nested inside start/endDTD and start/endEntity events (if used).
- Specified by:
commentin interfaceorg.xml.sax.ext.LexicalHandler
elementDecl
public void elementDecl(java.lang.String name, java.lang.String model) throws org.xml.sax.SAXException
- Description copied from interface:
org.xml.sax.ext.DeclHandler - Report an element type declaration.
The content model will consist of the string "EMPTY", the string "ANY", or a parenthesised group, optionally followed by an occurrence indicator. The model will be normalized so that all parameter entities are fully resolved and all whitespace is removed,and will include the enclosing parentheses. Other normalization (such as removing redundant parentheses or simplifying occurrence indicators) is at the discretion of the parser.
- Specified by:
elementDeclin interfaceorg.xml.sax.ext.DeclHandler
attributeDecl
public void attributeDecl(java.lang.String eName, java.lang.String aName, java.lang.String type, java.lang.String valueDefault, java.lang.String value) throws org.xml.sax.SAXException
- Description copied from interface:
org.xml.sax.ext.DeclHandler - Report an attribute type declaration.
Only the effective (first) declaration for an attribute will be reported. The type will be one of the strings "CDATA", "ID", "IDREF", "IDREFS", "NMTOKEN", "NMTOKENS", "ENTITY", "ENTITIES", a parenthesized token group with the separator "|" and all whitespace removed, or the word "NOTATION" followed by a space followed by a parenthesized token group with all whitespace removed.
The value will be the value as reported to applications, appropriately normalized and with entity and character references expanded.
- Specified by:
attributeDeclin interfaceorg.xml.sax.ext.DeclHandler
internalEntityDecl
public void internalEntityDecl(java.lang.String name, java.lang.String value) throws org.xml.sax.SAXException
- Description copied from interface:
org.xml.sax.ext.DeclHandler - Report an internal entity declaration.
Only the effective (first) declaration for each entity will be reported. All parameter entities in the value will be expanded, but general entities will not.
- Specified by:
internalEntityDeclin interfaceorg.xml.sax.ext.DeclHandler
externalEntityDecl
public void externalEntityDecl(java.lang.String name, java.lang.String publicId, java.lang.String sysId) throws org.xml.sax.SAXException
- Description copied from interface:
org.xml.sax.ext.DeclHandler - Report a parsed external entity declaration.
Only the effective (first) declaration for each entity will be reported.
If the system identifier is a URL, the parser must resolve it fully before passing it to the application.
- Specified by:
externalEntityDeclin interfaceorg.xml.sax.ext.DeclHandler
writeExternal
public void writeExternal(java.io.ObjectOutput out) throws java.io.IOException
- Description copied from interface:
java.io.Externalizable - This method is responsible for writing the instance data of an object
to the passed in stream. Note that this stream is not a subclass of
OutputStream, but rather is a class that implements theObjectOutputinterface. That interface provides a number of methods for writing Java data values to a stream.Not that the implementation of this method must be coordinated with the implementation of
readExternal.- Specified by:
writeExternalin interfacejava.io.Externalizable
readExternal
public void readExternal(java.io.ObjectInput in) throws java.lang.ClassNotFoundException, java.io.IOException
- Description copied from interface:
java.io.Externalizable - This method restores an object's state by reading in the instance data
for the object from the passed in stream. Note that this stream is not
a subclass of
InputStream, but rather is a class that implements theObjectInputinterface. That interface provides a mechanism for reading in Java data types from a stream.Note that this method must be compatible with
writeExternal. It must read back the exact same types that were written by that method in the exact order they were written.If this method needs to read back an object instance, then the class for that object must be found and loaded. If that operation fails, then this method throws a
ClassNotFoundException- Specified by:
readExternalin interfacejava.io.Externalizable
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