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/*--
Copyright (C) 2011-2012 Jason Hunter & Brett McLaughlin.
All rights reserved.
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modification, are permitted provided that the following conditions
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4. Products derived from this software may not be called "JDOM", nor
may "JDOM" appear in their name, without prior written permission
from the JDOM Project Management .
In addition, we request (but do not require) that you include in the
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software itself an acknowledgement equivalent to the following:
"This product includes software developed by the
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This software consists of voluntary contributions made by many
individuals on behalf of the JDOM Project and was originally
created by Jason Hunter and
Brett McLaughlin . For more information
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* The StAXStreamOutputter 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
*
{@link Format#getPrettyFormat()}.
* - For whitespace-normalised output, use
*
{@link Format#getCompactFormat()}.
* - For unmodified-format output, use
*
{@link Format#getRawFormat()}.
*
*
* All of the output*(...) methods will flush the
* destination XMLStreamWriter before returning, and none of them
* will close() the destination.
*
* To omit output of the declaration use
* {@link Format#setOmitDeclaration}. To omit printing of the
* encoding in the declaration use {@link Format#setOmitEncoding}.
*
* If changing the {@link Format} settings are insufficient for your output
* needs you can customise this StAXStreamOutputter further by setting a different
* {@link StAXStreamProcessor} with the
* {@link #setStAXStreamProcessor(StAXStreamProcessor)} method or an appropriate
* constructor. A fully-enabled Abstract class
* {@link AbstractStAXStreamProcessor} is available to be further extended to
* your needs if all you want to do is tweak some details.
*
* @since JDOM2
* @author Rolf Lear
*/
public final class StAXStreamOutputter implements Cloneable {
/*
* =====================================================================
* Static content.
* =====================================================================
*/
/**
* Create a final and static instance of the AbstractStAXStreamProcessor The
* final part is important because it improves performance.
*
* The JDOM user can change the actual XMLOutputProcessor with the
* {@link StAXStreamOutputter#setStAXStreamProcessor(StAXStreamProcessor)} method.
*
* @author rolf
*/
private static final class DefaultStAXStreamProcessor
extends AbstractStAXStreamProcessor {
// nothing
}
/**
* This constant StAXStreamProcessor is used for all non-customised
* StAXStreamOutputters
*/
private static final DefaultStAXStreamProcessor DEFAULTPROCESSOR =
new DefaultStAXStreamProcessor();
/*
* =====================================================================
* Instance content.
* =====================================================================
*/
// For normal output
private Format myFormat = null;
// The actual StAXStreamProcessor to delegate to.
private StAXStreamProcessor myProcessor = null;
/*
* =====================================================================
* Constructors
* =====================================================================
*/
/**
* This will create an StAXStreamOutputter with the specified format
* characteristics.
*
* Note: the format object is cloned internally before use. If you
* want to modify the Format after constructing the StAXStreamOutputter you can
* modify the Format instance {@link #getFormat()} returns.
*
* @param format
* The Format instance to use. This instance will be cloned() and as
* a consequence, changes made to the specified format instance
* will not be reflected in this StAXStreamOutputter. A null input
* format indicates that StAXStreamOutputter should use the default
* {@link Format#getRawFormat()}
* @param processor
* The XMLOutputProcessor to delegate output to. If null the
* StAXStreamOutputter will use the default XMLOutputProcessor.
*/
public StAXStreamOutputter(Format format, StAXStreamProcessor processor) {
myFormat = format == null ? Format.getRawFormat() : format.clone();
myProcessor = processor == null ? DEFAULTPROCESSOR : processor;
}
/**
* This will create an StAXStreamOutputter with a default
* {@link Format} and {@link XMLOutputProcessor}.
*/
public StAXStreamOutputter() {
this(null, null);
}
/**
* This will create an StAXStreamOutputter with the specified format
* characteristics.
*
* Note: the format object is cloned internally before use.
*
* @param format
* The Format instance to use. This instance will be cloned() and as
* a consequence, changes made to the specified format instance
* will not be reflected in this StAXStreamOutputter. A null input
* format indicates that StAXStreamOutputter should use the default
* {@link Format#getRawFormat()}
*/
public StAXStreamOutputter(Format format) {
this(format, null);
}
/**
* This will create an StAXStreamOutputter with the specified
* XMLOutputProcessor.
*
* @param processor
* The XMLOutputProcessor to delegate output to. If null the
* StAXStreamOutputter will use the default XMLOutputProcessor.
*/
public StAXStreamOutputter(StAXStreamProcessor processor) {
this(null, processor);
}
/*
* =======================================================================
* API - Settings...
* =======================================================================
*/
/**
* Sets the new format logic for the StAXStreamOutputter. Note the Format object is
* cloned internally before use.
*
* @see #getFormat()
* @param newFormat
* the format to use for subsequent output
*/
public void setFormat(Format newFormat) {
this.myFormat = newFormat.clone();
}
/**
* Returns the current format in use by the StAXStreamOutputter. Note the Format
* object returned is not a clone of the one used internally, thus,
* an StAXStreamOutputter instance is able to have it's Format changed by changing
* the settings on the Format instance returned by this method.
*
* @return the current Format instance used by this StAXStreamOutputter.
*/
public Format getFormat() {
return myFormat;
}
/**
* Returns the current XMLOutputProcessor instance in use by the
* StAXStreamOutputter.
*
* @return the current XMLOutputProcessor instance.
*/
public StAXStreamProcessor getStAXStream() {
return myProcessor;
}
/**
* Sets a new XMLOutputProcessor instance for this StAXStreamOutputter. Note the
* processor object is expected to be thread-safe.
*
* @param processor
* the new XMLOutputProcesor to use for output
*/
public void setStAXStreamProcessor(StAXStreamProcessor processor) {
this.myProcessor = processor;
}
/*
* ========================================================================
* API - Output to XMLStreamWriter Methods ... These are the core methods that the
* Stream and String output methods call. On the other hand, these methods
* defer to the protected/override methods. These methods flush the writer.
* ========================================================================
*/
/**
* 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.
*
*
* @param doc
* Document to format.
* @param out
* XMLStreamWriter to use.
* @throws XMLStreamException
* - if there's any problem writing.
* @throws NullPointerException
* if the specified content is null.
*/
public final void output(Document doc, XMLStreamWriter out) throws XMLStreamException {
myProcessor.process(out, myFormat, doc);
out.flush();
}
/**
* Print out the {@link DocType}.
*
* @param doctype
* DocType to output.
* @param out
* XMLStreamWriter to use.
* @throws XMLStreamException
* - if there's any problem writing.
* @throws NullPointerException
* if the specified content is null.
*/
public final void output(DocType doctype, XMLStreamWriter out) throws XMLStreamException {
myProcessor.process(out, myFormat, doctype);
out.flush();
}
/**
* Print out an {@link Element}, including its
* {@link Attribute}s, and all contained (child) elements, etc.
*
* @param element
* Element to output.
* @param out
* XMLStreamWriter to use.
* @throws XMLStreamException
* - if there's any problem writing.
* @throws NullPointerException
* if the specified content is null.
*/
public final void output(Element element, XMLStreamWriter out) throws XMLStreamException {
// If this is the root element we could pre-initialize the
// namespace stack with the namespaces
myProcessor.process(out, myFormat, element);
out.flush();
}
/**
* This will handle printing out an {@link
* 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>".
*
* @param element
* Element to output.
* @param out
* XMLStreamWriter to use.
* @throws XMLStreamException
* - if there's any problem writing.
* @throws NullPointerException
* if the specified content is null.
*/
public final void outputElementContent(Element element, XMLStreamWriter out)
throws XMLStreamException {
myProcessor.process(out, myFormat, element.getContent());
out.flush();
}
/**
* 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>".
*
* @param list
* List of nodes.
* @param out
* XMLStreamWriter to use.
* @throws XMLStreamException
* - if there's any problem writing.
* @throws NullPointerException
* if the specified content is null.
*/
public final void output(List list, XMLStreamWriter out)
throws XMLStreamException {
myProcessor.process(out, myFormat, list);
out.flush();
}
/**
* Print out a {@link CDATA} node.
*
* @param cdata
* CDATA to output.
* @param out
* XMLStreamWriter to use.
* @throws XMLStreamException
* - if there's any problem writing.
* @throws NullPointerException
* if the specified content is null.
*/
public final void output(CDATA cdata, XMLStreamWriter out) throws XMLStreamException {
myProcessor.process(out, myFormat, cdata);
out.flush();
}
/**
* Print out a {@link Text} node. Perfoms the necessary entity
* escaping and whitespace stripping.
*
* @param text
* Text to output.
* @param out
* XMLStreamWriter to use.
* @throws XMLStreamException
* - if there's any problem writing.
* @throws NullPointerException
* if the specified content is null.
*/
public final void output(Text text, XMLStreamWriter out) throws XMLStreamException {
myProcessor.process(out, myFormat, text);
out.flush();
}
/**
* Print out a {@link Comment}.
*
* @param comment
* Comment to output.
* @param out
* XMLStreamWriter to use.
* @throws XMLStreamException
* - if there's any problem writing.
* @throws NullPointerException
* if the specified content is null.
*/
public final void output(Comment comment, XMLStreamWriter out) throws XMLStreamException {
myProcessor.process(out, myFormat, comment);
out.flush();
}
/**
* Print out a {@link ProcessingInstruction}.
*
* @param pi
* ProcessingInstruction to output.
* @param out
* XMLStreamWriter to use.
* @throws XMLStreamException
* - if there's any problem writing.
* @throws NullPointerException
* if the specified content is null.
*/
public final void output(ProcessingInstruction pi, XMLStreamWriter out)
throws XMLStreamException {
myProcessor.process(out, myFormat, pi);
out.flush();
}
/**
* Print out an {@link EntityRef}.
*
* @param entity
* EntityRef to output.
* @param out
* XMLStreamWriter to use.
* @throws XMLStreamException
* - if there's any problem writing.
* @throws NullPointerException
* if the specified content is null.
*/
public final void output(EntityRef entity, XMLStreamWriter out) throws XMLStreamException {
myProcessor.process(out, myFormat, entity);
out.flush();
}
/*
* ========================================================================
* Basic Support methods.
* ========================================================================
*/
/**
* Returns a cloned copy of this StAXStreamOutputter.
*/
@Override
public StAXStreamOutputter clone() {
// Implementation notes: Since all state of an StAXStreamOutputter is
// embodied in simple private instance variables, Object.clone
// can be used. Note that since Object.clone is totally
// broken, we must catch an exception that will never be
// thrown.
try {
return (StAXStreamOutputter) super.clone();
} catch (java.lang.CloneNotSupportedException e) {
// even though this should never ever happen, it's still
// possible to fool Java into throwing a
// CloneNotSupportedException. If that happens, we
// shouldn't swallow it.
throw new RuntimeException(e.toString());
}
}
/**
* Return a string listing of the settings for this StAXStreamOutputter instance.
*
* @return a string listing the settings for this StAXStreamOutputter instance
*/
@Override
public String toString() {
StringBuilder buffer = new StringBuilder();
buffer.append("StAXStreamOutputter[omitDeclaration = ");
buffer.append(myFormat.omitDeclaration);
buffer.append(", ");
buffer.append("encoding = ");
buffer.append(myFormat.encoding);
buffer.append(", ");
buffer.append("omitEncoding = ");
buffer.append(myFormat.omitEncoding);
buffer.append(", ");
buffer.append("indent = '");
buffer.append(myFormat.indent);
buffer.append("'");
buffer.append(", ");
buffer.append("expandEmptyElements = ");
buffer.append(myFormat.expandEmptyElements);
buffer.append(", ");
buffer.append("lineSeparator = '");
for (char ch : myFormat.lineSeparator.toCharArray()) {
switch (ch) {
case '\r':
buffer.append("\\r");
break;
case '\n':
buffer.append("\\n");
break;
case '\t':
buffer.append("\\t");
break;
default:
buffer.append("[" + ((int) ch) + "]");
break;
}
}
buffer.append("', ");
buffer.append("textMode = ");
buffer.append(myFormat.mode + "]");
return buffer.toString();
}
}