org.objectweb.asm.xml

Class ASMContentHandler

public class ASMContentHandler extends DefaultHandler implements Constants

A org.xml.sax.ContentHandler ContentHandler that transforms XML document into Java class file. This class can be feeded by any kind of SAX 2.0 event producers, e.g. XML parser, XSLT or XPath engines, or custom code.

Author: Eugene Kuleshov

See Also: SAXClassAdapter

Field Summary
protected boolean	computeMax `true` if the maximum stack size and number of local variables must be automatically computed.
protected ClassWriter	cw Current instance of the `ClassWriter` used to write class bytecode.
protected Map	labels Map of the active `Label` instances for current method.
protected CodeVisitor	mw Current instance of the `CodeVisitor` used to write method bytecode
protected OutputStream	os Output stream to write result bytecode.

Constructor Summary
	ASMContentHandler(OutputStream os, boolean computeMax) Constructs a new `ASMContentHandler` object.

Method Summary
void	endDocument() Process notification of the end of a document and write generated bytecode into output stream.
void	endElement(String ns, String localName, String qName) Process notification of the end of an XML element being reached.
void	startElement(String ns, String localName, String qName, Attributes list) Process notification of the start of an XML element being reached.
byte[]	toByteArray() Returns the bytecode of the class that was build with underneath class writer.

Field Detail

computeMax

protected boolean computeMax

true if the maximum stack size and number of local variables must be automatically computed.

cw

protected ClassWriter cw

Current instance of the ClassWriter used to write class bytecode.

labels

protected Map labels

Map of the active Label instances for current method.

mw

protected CodeVisitor mw

Current instance of the CodeVisitor used to write method bytecode

os

protected OutputStream os

Output stream to write result bytecode.

Constructor Detail

ASMContentHandler

public ASMContentHandler(OutputStream os, boolean computeMax)

Constructs a new ASMContentHandler object.

Parameters: os output stream to write generated class. computeMax true if the maximum stack size and the maximum number of local variables must be automatically computed. This value is passed to ClassWriter instance.

Method Detail

endDocument

public final void endDocument()

Process notification of the end of a document and write generated bytecode into output stream.

Throws: SAXException if parsing or writing error is to be reported.

endElement

public final void endElement(String ns, String localName, String qName)

Process notification of the end of an XML element being reached.

Parameters: ns - The Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed. localName - The local name (without prefix), or the empty string if Namespace processing is not being performed. qName - The qualified XML 1.0 name (with prefix), or the empty string if qualified names are not available.

Throws: SAXException if a parsing error is to be reported

startElement

public final void startElement(String ns, String localName, String qName, Attributes list)

Process notification of the start of an XML element being reached.

Parameters: ns - The Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed. localName - The local name (without prefix), or the empty string if Namespace processing is not being performed. qName - The qualified name (with prefix), or the empty string if qualified names are not available. list - The attributes attached to the element. If there are no attributes, it shall be an empty Attributes object.

Throws: SAXException if a parsing error is to be reported

toByteArray

public byte[] toByteArray()

Returns the bytecode of the class that was build with underneath class writer.

Returns: the bytecode of the class that was build with underneath class writer or null if there are no classwriter created.