org.apache.xml.serialize
Class XMLSerializer

java.lang.Object
  |
  +--org.apache.xml.serialize.BaseMarkupSerializer
        |
        +--org.apache.xml.serialize.XMLSerializer
All Implemented Interfaces:
org.xml.sax.ContentHandler, org.xml.sax.ext.DeclHandler, org.xml.sax.DocumentHandler, DOMSerializer, org.xml.sax.DTDHandler, org.xml.sax.ext.LexicalHandler, Serializer

public class XMLSerializer
extends BaseMarkupSerializer

Implements an XML serializer supporting both DOM and SAX pretty serializing. For usage instructions see Serializer.

If an output stream is used, the encoding is taken from the output format (defaults to UTF-8). If a writer is used, make sure the writer uses the same encoding (if applies) as specified in the output format.

The serializer supports both DOM and SAX. SAX serializing is done by firing SAX events and using the serializer as a document handler. DOM serializing is done by calling BaseMarkupSerializer.serialize(Document) or by using DOM Level 3 org.apache.xerces.dom3.ls.DOMWriter and serializing with org.apache.xerces.dom3.ls.DOMWriter#writeNode, org.apache.xerces.dom3.ls.DOMWriter#writeToString.

If an I/O exception occurs while serializing, the serializer will not throw an exception directly, but only throw it at the end of serializing (either DOM or SAX's DocumentHandler.endDocument().

For elements that are not specified as whitespace preserving, the serializer will potentially break long text lines at space boundaries, indent lines, and serialize elements on separate lines. Line terminators will be regarded as spaces, and spaces at beginning of line will be stripped.

Version:
$Revision: 1.35 $ $Date: 2002/06/12 00:27:46 $
Author:
Assaf Arkin, Rahul Srivastava, Elena Litani IBM
See Also:
Serializer

Field Summary
protected static boolean DEBUG
           
protected  boolean fDOML1
           
protected  java.lang.String fEmptySymbol
           
protected  org.apache.xerces.util.NamespaceSupport fLocalNSBinder
          stores all namespace bindings on the current element
protected  int fNamespaceCounter
           
protected  boolean fNamespaces
          Controls whether namespace fixup should be performed during the serialization.
protected  org.apache.xerces.util.NamespaceSupport fNSBinder
          stores namespaces in scope
protected  org.apache.xerces.util.SymbolTable fSymbolTable
          symbol table for serialization
protected  java.lang.String fXmlnsSymbol
           
protected  java.lang.String fXmlSymbol
           
 
Fields inherited from class org.apache.xml.serialize.BaseMarkupSerializer
_docTypePublicId, _docTypeSystemId, _format, _indenting, _prefixes, _printer, _started, fDOMError, fDOMErrorHandler, fFeatures, fStrBuffer
 
Constructor Summary
XMLSerializer()
          Constructs a new serializer.
XMLSerializer(OutputFormat format)
          Constructs a new serializer.
XMLSerializer(java.io.OutputStream output, OutputFormat format)
          Constructs a new serializer that writes to the specified output stream using the specified output format.
XMLSerializer(java.io.Writer writer, OutputFormat format)
          Constructs a new serializer that writes to the specified writer using the specified output format.
 
Method Summary
 void endElement(java.lang.String tagName)
          Receive notification of the end of an element.
 void endElement(java.lang.String namespaceURI, java.lang.String localName, java.lang.String rawName)
          Receive notification of the end of an element.
 void endElementIO(java.lang.String namespaceURI, java.lang.String localName, java.lang.String rawName)
           
protected  java.lang.String getEntityRef(int ch)
          Returns the suitable entity reference for this character value, or null if no such entity exists.
 boolean reset()
           
protected  void serializeElement(org.w3c.dom.Element elem)
          Called to serialize a DOM element.
 void setOutputFormat(OutputFormat format)
          Specifies an output format for this serializer.
protected  void startDocument(java.lang.String rootTagName)
          Called to serialize the document's DOCTYPE by the root element.
 void startElement(java.lang.String tagName, org.xml.sax.AttributeList attrs)
          Receive notification of the beginning of an element.
 void startElement(java.lang.String namespaceURI, java.lang.String localName, java.lang.String rawName, org.xml.sax.Attributes attrs)
          Receive notification of the beginning of an element.
 
Methods inherited from class org.apache.xml.serialize.BaseMarkupSerializer
asContentHandler, asDocumentHandler, asDOMSerializer, attributeDecl, characters, characters, comment, comment, content, elementDecl, endCDATA, endDocument, endDTD, endEntity, endNonEscaping, endPrefixMapping, endPreserving, enterElementState, externalEntityDecl, getElementState, getPrefix, ignorableWhitespace, internalEntityDecl, isDocumentState, leaveElementState, modifyDOMError, notationDecl, prepare, printDoctypeURL, printEscaped, printEscaped, printText, printText, processingInstruction, processingInstructionIO, serialize, serialize, serialize, serializeNode, serializePreRoot, setDocumentLocator, setOutputByteStream, setOutputCharStream, skippedEntity, startCDATA, startDocument, startDTD, startEntity, startNonEscaping, startPrefixMapping, startPreserving, unparsedEntityDecl
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

DEBUG

protected static final boolean DEBUG
See Also:
Constant Field Values

fNSBinder

protected org.apache.xerces.util.NamespaceSupport fNSBinder
stores namespaces in scope


fLocalNSBinder

protected org.apache.xerces.util.NamespaceSupport fLocalNSBinder
stores all namespace bindings on the current element


fSymbolTable

protected org.apache.xerces.util.SymbolTable fSymbolTable
symbol table for serialization


fEmptySymbol

protected java.lang.String fEmptySymbol

fXmlSymbol

protected java.lang.String fXmlSymbol

fXmlnsSymbol

protected java.lang.String fXmlnsSymbol

fDOML1

protected boolean fDOML1

fNamespaceCounter

protected int fNamespaceCounter

fNamespaces

protected boolean fNamespaces
Controls whether namespace fixup should be performed during the serialization. NOTE: if this field is set to true the following fields need to be initialized: fNSBinder, fLocalNSBinder, fSymbolTable, fEmptySymbol, fXmlSymbol, fXmlnsSymbol, fNamespaceCounter.

Constructor Detail

XMLSerializer

public XMLSerializer()
Constructs a new serializer. The serializer cannot be used without calling #setOutFputCharStream or BaseMarkupSerializer.setOutputByteStream(java.io.OutputStream) first.


XMLSerializer

public XMLSerializer(OutputFormat format)
Constructs a new serializer. The serializer cannot be used without calling BaseMarkupSerializer.setOutputCharStream(java.io.Writer) or BaseMarkupSerializer.setOutputByteStream(java.io.OutputStream) first.


XMLSerializer

public XMLSerializer(java.io.Writer writer,
                     OutputFormat format)
Constructs a new serializer that writes to the specified writer using the specified output format. If format is null, will use a default output format.

Parameters:
writer - The writer to use
format - The output format to use, null for the default

XMLSerializer

public XMLSerializer(java.io.OutputStream output,
                     OutputFormat format)
Constructs a new serializer that writes to the specified output stream using the specified output format. If format is null, will use a default output format.

Parameters:
output - The output stream to use
format - The output format to use, null for the default
Method Detail

setOutputFormat

public void setOutputFormat(OutputFormat format)
Description copied from interface: Serializer
Specifies an output format for this serializer. It the serializer has already been associated with an output format, it will switch to the new format. This method should not be called while the serializer is in the process of serializing a document.

Specified by:
setOutputFormat in interface Serializer
Overrides:
setOutputFormat in class BaseMarkupSerializer
Parameters:
format - The output format to use

startElement

public void startElement(java.lang.String namespaceURI,
                         java.lang.String localName,
                         java.lang.String rawName,
                         org.xml.sax.Attributes attrs)
                  throws org.xml.sax.SAXException
Description copied from interface: org.xml.sax.ContentHandler
Receive notification of the beginning of an element.

The Parser will invoke this method at the beginning of every element in the XML document; there will be a corresponding endElement event for every startElement event (even when the element is empty). All of the element's content will be reported, in order, before the corresponding endElement event.

This event allows up to three name components for each element:

  1. the Namespace URI;
  2. the local name; and
  3. the qualified (prefixed) name.

Any or all of these may be provided, depending on the values of the http://xml.org/sax/features/namespaces and the http://xml.org/sax/features/namespace-prefixes properties:

Note that the attribute list provided will contain only attributes with explicit values (specified or defaulted): #IMPLIED attributes will be omitted. The attribute list will contain attributes used for Namespace declarations (xmlns* attributes) only if the http://xml.org/sax/features/namespace-prefixes property is true (it is false by default, and support for a true value is optional).

Parameters:
localName - The local name (without prefix), or the empty string if Namespace processing is not being performed.
rawName - The qualified name (with prefix), or the empty string if qualified names are not available.
attrs - The attributes attached to the element. If there are no attributes, it shall be an empty Attributes object.
Throws:
org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.
See Also:
ContentHandler.endElement(java.lang.String, java.lang.String, java.lang.String), Attributes

endElement

public void endElement(java.lang.String namespaceURI,
                       java.lang.String localName,
                       java.lang.String rawName)
                throws org.xml.sax.SAXException
Description copied from interface: org.xml.sax.ContentHandler
Receive notification of the end of an element.

The SAX parser will invoke this method at the end of every element in the XML document; there will be a corresponding startElement event for every endElement event (even when the element is empty).

For information on the names, see startElement.

Parameters:
localName - The local name (without prefix), or the empty string if Namespace processing is not being performed.
rawName - The qualified XML 1.0 name (with prefix), or the empty string if qualified names are not available.
Throws:
org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

endElementIO

public void endElementIO(java.lang.String namespaceURI,
                         java.lang.String localName,
                         java.lang.String rawName)
                  throws java.io.IOException
java.io.IOException

startElement

public void startElement(java.lang.String tagName,
                         org.xml.sax.AttributeList attrs)
                  throws org.xml.sax.SAXException
Description copied from interface: org.xml.sax.DocumentHandler
Receive notification of the beginning of an element.

The Parser will invoke this method at the beginning of every element in the XML document; there will be a corresponding endElement() event for every startElement() event (even when the element is empty). All of the element's content will be reported, in order, before the corresponding endElement() event.

If the element name has a namespace prefix, the prefix will still be attached. Note that the attribute list provided will contain only attributes with explicit values (specified or defaulted): #IMPLIED attributes will be omitted.

Parameters:
tagName - The element type name.
attrs - The attributes attached to the element, if any.
Throws:
org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.
See Also:
DocumentHandler.endElement(java.lang.String), AttributeList

endElement

public void endElement(java.lang.String tagName)
                throws org.xml.sax.SAXException
Description copied from interface: org.xml.sax.DocumentHandler
Receive notification of the end of an element.

The SAX parser will invoke this method at the end of every element in the XML document; there will be a corresponding startElement() event for every endElement() event (even when the element is empty).

If the element name has a namespace prefix, the prefix will still be attached to the name.

Parameters:
tagName - The element type name
Throws:
org.xml.sax.SAXException - Any SAX exception, possibly wrapping another exception.

startDocument

protected void startDocument(java.lang.String rootTagName)
                      throws java.io.IOException
Called to serialize the document's DOCTYPE by the root element. The document type declaration must name the root element, but the root element is only known when that element is serialized, and not at the start of the document.

This method will check if it has not been called before (BaseMarkupSerializer._started), will serialize the document type declaration, and will serialize all pre-root comments and PIs that were accumulated in the document (see BaseMarkupSerializer.serializePreRoot()). Pre-root will be serialized even if this is not the first root element of the document.

java.io.IOException

serializeElement

protected void serializeElement(org.w3c.dom.Element elem)
                         throws java.io.IOException
Called to serialize a DOM element. Equivalent to calling startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes), endElement(java.lang.String, java.lang.String, java.lang.String) and serializing everything inbetween, but better optimized.

Specified by:
serializeElement in class BaseMarkupSerializer
Parameters:
elem - The element to serialize
Throws:
java.io.IOException - An I/O exception occured while serializing

getEntityRef

protected java.lang.String getEntityRef(int ch)
Description copied from class: BaseMarkupSerializer
Returns the suitable entity reference for this character value, or null if no such entity exists. Calling this method with '&' will return "&".

Specified by:
getEntityRef in class BaseMarkupSerializer
Parameters:
ch - Character value
Returns:
Character entity name, or null

reset

public boolean reset()
Overrides:
reset in class BaseMarkupSerializer


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