org.jdom.output
Class XMLOutputter

java.lang.Object
  org.jdom.output.XMLOutputter

All Implemented Interfaces:

java.lang.Cloneable

public class XMLOutputter
extends java.lang.Object
implements java.lang.Cloneable

Outputs a JDOM document as a stream of bytes. The outputter can manage many styles of document formatting, from untouched to pretty printed. The default is to output the document content exactly as created, but this can be changed by setting a new Format object. For pretty-print output, use Format.getPrettyFormat(). For whitespace-normalized output, use Format.getCompactFormat().

There are output(...) methods to print any of the standard JDOM classes, including Document and Element, to either a Writer or an OutputStream. Warning: When outputting to a Writer, make sure the writer's encoding matches the encoding setting in the Format object. This ensures the encoding in which the content is written (controlled by the Writer configuration) matches the encoding placed in the document's XML declaration (controlled by the XMLOutputter). Because a Writer cannot be queried for its encoding, the information must be passed to the Format manually in its constructor or via the Format.setEncoding(java.lang.String) method. The default encoding is UTF-8.

The methods outputString(...) are for convenience only; for top performance you should call one of the output(...) methods and pass in your own Writer or OutputStream if possible.

XML declarations are always printed on their own line followed by a line seperator (this doesn't change the semantics of the document). To omit printing of the declaration use Format.setOmitDeclaration(boolean). To omit printing of the encoding in the declaration use Format.setOmitEncoding(boolean). Unfortunatly there is currently no way to know the original encoding of the document.

Empty elements are by default printed as <empty/>, but this can be configured with Format.setExpandEmptyElements(boolean) to cause them to be expanded to <empty></empty>.

Version:

$Revision: 1.1 $, $Date: 2012/04/08 22:48:01 $

Author:

Brett McLaughlin, Jason Hunter, Jason Reid, Wolfgang Werner, Elliotte Rusty Harold, David & Will (from Post Tool Design), Dan Schaffer, Alex Chaffee, Bradley S. Huffman

Nested Class Summary

protected class

XMLOutputter.NamespaceStack Our own null subclass of NamespaceStack.

Field Summary

protected Format	currentFormat
protected static Format	preserveFormat

Constructor Summary

XMLOutputter()
This will create an XMLOutputter with the default Format matching Format.getRawFormat().

XMLOutputter(Format format)
This will create an XMLOutputter with the specified format characteristics.

XMLOutputter(XMLOutputter that)
This will create an XMLOutputter with all the options as set in the given XMLOutputter.

Method Summary

java.lang.Object	clone() Returns a copy of this XMLOutputter.
java.lang.String	escapeAttributeEntities(java.lang.String str) This will take the pre-defined entities in XML 1.0 and convert their character representation to the appropriate entity reference, suitable for XML attributes.
java.lang.String	escapeElementEntities(java.lang.String str) This will take the three pre-defined entities in XML 1.0 (used specifically in XML elements) and convert their character representation to the appropriate entity reference, suitable for XML element content.
Format	getFormat() Returns the current format in use by the outputter.
void	output(CDATA cdata, java.io.OutputStream out) Print out a CDATA node.
void	output(CDATA cdata, java.io.Writer out) Print out a CDATA node.
void	output(Comment comment, java.io.OutputStream out) Print out a Comment.
void	output(Comment comment, java.io.Writer out) Print out a Comment.
void	output(DocType doctype, java.io.OutputStream out) Print out the DocType.
void	output(DocType doctype, java.io.Writer out) Print out the DocType.
void	output(Document doc, java.io.OutputStream out) This will print the Document to the given output stream.
void	output(Document doc, java.io.Writer out) This will print the Document to the given Writer.
void	output(Element element, java.io.OutputStream out) Print out an Element, including its Attributes, and all contained (child) elements, etc.
void	output(Element element, java.io.Writer out) Print out an Element, including its Attributes, and all contained (child) elements, etc.
void	output(EntityRef entity, java.io.OutputStream out) Print out a EntityRef.
void	output(EntityRef entity, java.io.Writer out) Print out a EntityRef.
void	output(java.util.List list, java.io.OutputStream out) This will handle printing out a list of nodes.
void	output(java.util.List list, java.io.Writer out) This will handle printing out a list of nodes.
void	output(ProcessingInstruction pi, java.io.OutputStream out) Print out a ProcessingInstruction.
void	output(ProcessingInstruction pi, java.io.Writer out) Print out a ProcessingInstruction.
void	output(Text text, java.io.OutputStream out) Print out a Text node.
void	output(Text text, java.io.Writer out) Print out a Text node.
void	outputElementContent(Element element, java.io.OutputStream out) This will handle printing out an Element's content only, not including its tag, and attributes.
void	outputElementContent(Element element, java.io.Writer out) This will handle printing out an Element's content only, not including its tag, and attributes.
java.lang.String	outputString(CDATA cdata) Return a string representing a CDATA node.
java.lang.String	outputString(Comment comment) Return a string representing a comment.
java.lang.String	outputString(DocType doctype) Return a string representing a DocType.
java.lang.String	outputString(Document doc) Return a string representing a document.
java.lang.String	outputString(Element element) Return a string representing an element.
java.lang.String	outputString(EntityRef entity) Return a string representing an entity.
java.lang.String	outputString(java.util.List list) Return a string representing a list of nodes.
java.lang.String	outputString(ProcessingInstruction pi) Return a string representing a PI.
java.lang.String	outputString(Text text) Return a string representing a Text node.
protected void	printAttributes(java.io.Writer out, java.util.List attributes, Element parent, XMLOutputter.NamespaceStack namespaces) This will handle printing of a Attribute list.
protected void	printCDATA(java.io.Writer out, CDATA cdata) This will handle printing of CDATA text.
protected void	printComment(java.io.Writer out, Comment comment) This will handle printing of comments.
protected void	printDeclaration(java.io.Writer out, Document doc, java.lang.String encoding) This will handle printing of the declaration.
protected void	printDocType(java.io.Writer out, DocType docType) This handle printing the DOCTYPE declaration if one exists.
protected void	printElement(java.io.Writer out, Element element, int level, XMLOutputter.NamespaceStack namespaces) This will handle printing of a Element, its Attributes, and all contained (child) elements, etc.
protected void	printEntityRef(java.io.Writer out, EntityRef entity) This will handle printing a EntityRef.
protected void	printProcessingInstruction(java.io.Writer out, ProcessingInstruction pi) This will handle printing of processing instructions.
protected void	printText(java.io.Writer out, Text text) This will handle printing of Text strings.
void	setFormat(Format newFormat) Sets the new format logic for the outputter.
java.lang.String	toString() Return a string listing of the settings for this XMLOutputter instance.

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

preserveFormat

protected static final Format preserveFormat

currentFormat

protected Format currentFormat

Constructor Detail

XMLOutputter

public XMLOutputter()

This will create an XMLOutputter with the default Format matching Format.getRawFormat().

XMLOutputter

public XMLOutputter(Format format)

This will create an XMLOutputter with the specified format characteristics. Note the format object is cloned internally before use.

XMLOutputter

public XMLOutputter(XMLOutputter that)

This will create an XMLOutputter with all the options as set in the given XMLOutputter. Note that XMLOutputter two = (XMLOutputter)one.clone(); would work equally well.

Parameters:

that - the XMLOutputter to clone

Method Detail

setFormat

public void setFormat(Format newFormat)

Sets the new format logic for the outputter. Note the Format object is cloned internally before use.

Parameters:

newFormat - the format to use for output

getFormat

public Format getFormat()

Returns the current format in use by the outputter. Note the Format object returned is a clone of the one used internally.

output

public void output(Document doc,
                   java.io.OutputStream out)
            throws java.io.IOException

This will print the Document to the given output stream. The characters are printed using the encoding specified in the constructor, or a default of UTF-8.

Parameters:

doc - Document to format.

out - OutputStream to use.

Throws:

java.io.IOException - - if there's any problem writing.

output

public void output(DocType doctype,
                   java.io.OutputStream out)
            throws java.io.IOException

Print out the DocType.

Parameters:

doctype - DocType to output.

out - OutputStream to use.

Throws:

java.io.IOException

output

public void output(Element element,
                   java.io.OutputStream out)
            throws java.io.IOException

Print out an Element, including its Attributes, and all contained (child) elements, etc.

Parameters:

element - Element to output.

out - Writer to use.

Throws:

java.io.IOException

outputElementContent

public void outputElementContent(Element element,
                                 java.io.OutputStream out)
                          throws java.io.IOException

This will handle printing out an Element's content only, not including its tag, and attributes. This can be useful for printing the content of an element that contains HTML, like "<description>JDOM is <b>fun>!</description>".

Parameters:

element - Element to output.

out - OutputStream to use.

Throws:

java.io.IOException

output

public void output(java.util.List list,
                   java.io.OutputStream out)
            throws java.io.IOException

This will handle printing out a list of nodes. This can be useful for printing the content of an element that contains HTML, like "<description>JDOM is <b>fun>!</description>".

Parameters:

list - List of nodes.

out - OutputStream to use.

Throws:

java.io.IOException

output

public void output(CDATA cdata,
                   java.io.OutputStream out)
            throws java.io.IOException

Print out a CDATA node.

Parameters:

cdata - CDATA to output.

out - OutputStream to use.

Throws:

java.io.IOException

output

public void output(Text text,
                   java.io.OutputStream out)
            throws java.io.IOException

Print out a Text node. Perfoms the necessary entity escaping and whitespace stripping.

Parameters:

text - Text to output.

out - OutputStream to use.

Throws:

java.io.IOException

output

public void output(Comment comment,
                   java.io.OutputStream out)
            throws java.io.IOException

Print out a Comment.

Parameters:

comment - Comment to output.

out - OutputStream to use.

Throws:

java.io.IOException

output

public void output(ProcessingInstruction pi,
                   java.io.OutputStream out)
            throws java.io.IOException

Print out a ProcessingInstruction.

Parameters:

pi - ProcessingInstruction to output.

out - OutputStream to use.

Throws:

java.io.IOException

output

public void output(EntityRef entity,
                   java.io.OutputStream out)
            throws java.io.IOException

Print out a EntityRef.

Parameters:

entity - EntityRef to output.

out - OutputStream to use.

Throws:

java.io.IOException

output

public void output(Document doc,
                   java.io.Writer out)
            throws java.io.IOException

This will print the Document to the given Writer.

Warning: using your own Writer may cause the outputter's preferred character encoding to be ignored. If you use encodings other than UTF-8, we recommend using the method that takes an OutputStream instead.

Parameters:

doc - Document to format.

out - Writer to use.

Throws:

java.io.IOException - - if there's any problem writing.

output

public void output(DocType doctype,
                   java.io.Writer out)
            throws java.io.IOException

Print out the DocType.

Parameters:

doctype - DocType to output.

out - Writer to use.

Throws:

java.io.IOException

output

public void output(Element element,
                   java.io.Writer out)
            throws java.io.IOException

Print out an Element, including its Attributes, and all contained (child) elements, etc.

Parameters:

element - Element to output.

out - Writer to use.

Throws:

java.io.IOException

outputElementContent

public void outputElementContent(Element element,
                                 java.io.Writer out)
                          throws java.io.IOException

This will handle printing out an Element's content only, not including its tag, and attributes. This can be useful for printing the content of an element that contains HTML, like "<description>JDOM is <b>fun>!</description>".

Parameters:

element - Element to output.

out - Writer to use.

Throws:

java.io.IOException

output

public void output(java.util.List list,
                   java.io.Writer out)
            throws java.io.IOException

This will handle printing out a list of nodes. This can be useful for printing the content of an element that contains HTML, like "<description>JDOM is <b>fun>!</description>".

Parameters:

list - List of nodes.

out - Writer to use.

Throws:

java.io.IOException

output

public void output(CDATA cdata,
                   java.io.Writer out)
            throws java.io.IOException

Print out a CDATA node.

Parameters:

cdata - CDATA to output.

out - Writer to use.

Throws:

java.io.IOException

output

public void output(Text text,
                   java.io.Writer out)
            throws java.io.IOException

Print out a Text node. Perfoms the necessary entity escaping and whitespace stripping.

Parameters:

text - Text to output.

out - Writer to use.

Throws:

java.io.IOException

output

public void output(Comment comment,
                   java.io.Writer out)
            throws java.io.IOException

Print out a Comment.

Parameters:

comment - Comment to output.

out - Writer to use.

Throws:

java.io.IOException

output

public void output(ProcessingInstruction pi,
                   java.io.Writer out)
            throws java.io.IOException

Print out a ProcessingInstruction.

Parameters:

pi - ProcessingInstruction to output.

out - Writer to use.

Throws:

java.io.IOException

output

public void output(EntityRef entity,
                   java.io.Writer out)
            throws java.io.IOException

Print out a EntityRef.

Parameters:

entity - EntityRef to output.

out - Writer to use.

Throws:

java.io.IOException

outputString

public java.lang.String outputString(Document doc)

Return a string representing a document. Uses an internal StringWriter. Warning: a String is Unicode, which may not match the outputter's specified encoding.

Parameters:

doc - Document to format.

outputString

public java.lang.String outputString(DocType doctype)

Return a string representing a DocType. Warning: a String is Unicode, which may not match the outputter's specified encoding.

Parameters:

doctype - DocType to format.

outputString

public java.lang.String outputString(Element element)

Return a string representing an element. Warning: a String is Unicode, which may not match the outputter's specified encoding.

Parameters:

element - Element to format.

outputString

public java.lang.String outputString(java.util.List list)

Return a string representing a list of nodes. The list is assumed to contain legal JDOM nodes.

Parameters:

list - List to format.

outputString

public java.lang.String outputString(CDATA cdata)

Return a string representing a CDATA node. Warning: a String is Unicode, which may not match the outputter's specified encoding.

Parameters:

cdata - CDATA to format.

outputString

public java.lang.String outputString(Text text)

Return a string representing a Text node. Warning: a String is Unicode, which may not match the outputter's specified encoding.

Parameters:

text - Text to format.

outputString

public java.lang.String outputString(Comment comment)

Return a string representing a comment. Warning: a String is Unicode, which may not match the outputter's specified encoding.

Parameters:

comment - Comment to format.

outputString

public java.lang.String outputString(ProcessingInstruction pi)

Return a string representing a PI. Warning: a String is Unicode, which may not match the outputter's specified encoding.

Parameters:

pi - ProcessingInstruction to format.

outputString

public java.lang.String outputString(EntityRef entity)

Return a string representing an entity. Warning: a String is Unicode, which may not match the outputter's specified encoding.

Parameters:

entity - EntityRef to format.

printDeclaration

protected void printDeclaration(java.io.Writer out,
                                Document doc,
                                java.lang.String encoding)
                         throws java.io.IOException

This will handle printing of the declaration. Assumes XML version 1.0 since we don't directly know.

Parameters:

doc - Document whose declaration to write.

out - Writer to use.

encoding - The encoding to add to the declaration

Throws:

java.io.IOException

printDocType

protected void printDocType(java.io.Writer out,
                            DocType docType)
                     throws java.io.IOException

This handle printing the DOCTYPE declaration if one exists.

Parameters:

docType - Document whose declaration to write.

out - Writer to use.

Throws:

java.io.IOException

printComment

protected void printComment(java.io.Writer out,
                            Comment comment)
                     throws java.io.IOException

This will handle printing of comments.

Parameters:

comment - Comment to write.

out - Writer to use.

Throws:

java.io.IOException

printProcessingInstruction

protected void printProcessingInstruction(java.io.Writer out,
                                          ProcessingInstruction pi)
                                   throws java.io.IOException

This will handle printing of processing instructions.

Parameters:

pi - ProcessingInstruction to write.

out - Writer to use.

Throws:

java.io.IOException

printEntityRef

protected void printEntityRef(java.io.Writer out,
                              EntityRef entity)
                       throws java.io.IOException

This will handle printing a EntityRef. Only the entity reference such as &entity; will be printed. However, subclasses are free to override this method to print the contents of the entity instead.

Parameters:

entity - EntityRef to output.

out - Writer to use.

Throws:

java.io.IOException

printCDATA

protected void printCDATA(java.io.Writer out,
                          CDATA cdata)
                   throws java.io.IOException

This will handle printing of CDATA text.

Parameters:

cdata - CDATA to output.

out - Writer to use.

Throws:

java.io.IOException

printText

protected void printText(java.io.Writer out,
                         Text text)
                  throws java.io.IOException

This will handle printing of Text strings.

Parameters:

text - Text to write.

out - Writer to use.

Throws:

java.io.IOException

printElement

protected void printElement(java.io.Writer out,
                            Element element,
                            int level,
                            XMLOutputter.NamespaceStack namespaces)
                     throws java.io.IOException

This will handle printing of a Element, its Attributes, and all contained (child) elements, etc.

Parameters:

element - Element to output.

out - Writer to use.

level - int level of indention.

namespaces - List stack of Namespaces in scope.

Throws:

java.io.IOException

printAttributes

protected void printAttributes(java.io.Writer out,
                               java.util.List attributes,
                               Element parent,
                               XMLOutputter.NamespaceStack namespaces)
                        throws java.io.IOException

This will handle printing of a Attribute list.

Parameters:

attributes - List of Attribute objcts

out - Writer to use

Throws:

java.io.IOException

escapeAttributeEntities

public java.lang.String escapeAttributeEntities(java.lang.String str)

This will take the pre-defined entities in XML 1.0 and convert their character representation to the appropriate entity reference, suitable for XML attributes. It does not convert the single quote (') because it's not necessary as the outputter writes attributes surrounded by double-quotes.

Parameters:

str - String input to escape.

Returns:

String with escaped content.

Throws:

java.lang.IllegalArgumentException - if an entity can not be escaped

escapeElementEntities

public java.lang.String escapeElementEntities(java.lang.String str)

This will take the three pre-defined entities in XML 1.0 (used specifically in XML elements) and convert their character representation to the appropriate entity reference, suitable for XML element content.

Parameters:

str - String input to escape.

Returns:

String with escaped content.

Throws:

java.lang.IllegalArgumentException - if an entity can not be escaped

clone

public java.lang.Object clone()

Returns a copy of this XMLOutputter.

Overrides:

clone in class java.lang.Object

toString

public java.lang.String toString()

Return a string listing of the settings for this XMLOutputter instance.

Overrides:

toString in class java.lang.Object

Returns:

a string listing the settings for this XMLOutputter instance