org.milyn.io
Class AbstractOutputStreamResource

java.lang.Object
  org.milyn.io.AbstractOutputStreamResource

All Implemented Interfaces:

ContentHandler, DOMVisitBefore, DOMVisitor, ExecutionLifecycleCleanable, Consumer, SAXVisitBefore, SAXVisitor, VisitLifecycleCleanable, Visitor

public abstract class AbstractOutputStreamResource
extends Object
implements SAXVisitBefore, DOMVisitBefore, Consumer, VisitLifecycleCleanable, ExecutionLifecycleCleanable

AbstractOuputStreamResource is the base class for handling output stream resources in Smooks.

Note that a Writer can also be opened on a stream resource. If a Writer has been opened on a resource, an OutputStream cannot also be opened (and visa versa).

Example configuration:

 <resource-config selector="#document">
    <resource>org.milyn.io.ConcreateImpl</resource>
    <param name="resourceName">resourceName</param>
    <param name="writerEncoding">UTF-8</param> <!-- Optional -->
 </resource-config>
 

Description of configuration properties:

• resource: should be a concreate implementation of this class
• resourceName: the name of this resouce. Will be used to identify this resource
• writerEncoding: (Optional) the encoding to be used by any writers opened on this resource (Default is "UTF-8")

Author:

Daniel Bevenius

Field Summary

protected static String

RESOURCE_CONTEXT_KEY_PREFIX

Constructor Summary

AbstractOutputStreamResource()

Method Summary

protected boolean	closeCondition(ExecutionContext executionContext)
protected void	closeResource(ExecutionContext executionContext) Close the resource output stream.
boolean	consumes(Object object) Does this consumer consume the specified named object.
void	executeExecutionLifecycleCleanup(ExecutionContext executionContext) Cleanup the resources allocated by this resource for the specified ExecutionContext.
void	executeVisitLifecycleCleanup(ExecutionContext executionContext) Cleanup the resources allocated by this resource for the specified ExecutionContext.
abstract OutputStream	getOutputStream(ExecutionContext executionContext) Retrieve/create an output stream that is appropriate for the concreate implementation
static OutputStream	getOutputStream(String resourceName, ExecutionContext executionContext) Get an OutputStream to the named Resource.
static Writer	getOutputWriter(String resourceName, ExecutionContext executionContext) Get a Writer to the named OutputStream Resource.
String	getResourceName() Get the name of this resource
Charset	getWriterEncoding()
AbstractOutputStreamResource	setResourceName(String resourceName) Set the name of this resource
AbstractOutputStreamResource	setWriterEncoding(Charset writerEncoding)
void	visitBefore(Element element, ExecutionContext executionContext) Visit the supplied element before visiting its child elements.
void	visitBefore(SAXElement element, ExecutionContext executionContext) Visit the supplied element before visiting its child elements.

Methods inherited from class java.lang.Object

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

Field Detail

RESOURCE_CONTEXT_KEY_PREFIX

protected static final String RESOURCE_CONTEXT_KEY_PREFIX

Constructor Detail

AbstractOutputStreamResource

public AbstractOutputStreamResource()

Method Detail

getOutputStream

public abstract OutputStream getOutputStream(ExecutionContext executionContext)
                                      throws IOException

Retrieve/create an output stream that is appropriate for the concreate implementation

Parameters:

executionContext - Execution Context.

Returns:

OutputStream specific to the concreate implementation

Throws:

IOException

getResourceName

public String getResourceName()

Get the name of this resource

Returns:

The name of the resource

consumes

public boolean consumes(Object object)

Description copied from interface: Consumer

Does this consumer consume the specified named object.

The named object would be a product of a Producer that is executing on the same element. The consumer should only return false if it knows for certain that it doesn't consumer the specified named object. If uncertain, it should error on the side of saying that it does consume the object.

Specified by:

consumes in interface Consumer

Parameters:

object - The product representation

Returns:

True if the consumer consumes the specified product, otherwise false.

setResourceName

public AbstractOutputStreamResource setResourceName(String resourceName)

Set the name of this resource

Parameters:

resourceName - The name of the resource

setWriterEncoding

public AbstractOutputStreamResource setWriterEncoding(Charset writerEncoding)

getWriterEncoding

public Charset getWriterEncoding()

visitBefore

public void visitBefore(SAXElement element,
                        ExecutionContext executionContext)
                 throws SmooksException,
                        IOException

Description copied from interface: SAXVisitBefore

Visit the supplied element before visiting its child elements.

Specified by:

visitBefore in interface SAXVisitBefore

Parameters:

element - The SAX element being visited.

executionContext - Execution context.

Throws:

SmooksException - Event processing failure.

IOException - Error writing event to output writer.

visitBefore

public void visitBefore(Element element,
                        ExecutionContext executionContext)
                 throws SmooksException

Description copied from interface: DOMVisitBefore

Visit the supplied element before visiting its child elements.

Specified by:

visitBefore in interface DOMVisitBefore

Parameters:

element - The DOM element being visited.

executionContext - Request relative instance.

Throws:

SmooksException - Element processing failure.

executeVisitLifecycleCleanup

public void executeVisitLifecycleCleanup(ExecutionContext executionContext)

Description copied from interface: VisitLifecycleCleanable

Cleanup the resources allocated by this resource for the specified ExecutionContext.

Executes the cleanup at the end of the fragment visit.

Specified by:

executeVisitLifecycleCleanup in interface VisitLifecycleCleanable

Parameters:

executionContext - The ExecutionContext.

executeExecutionLifecycleCleanup

public void executeExecutionLifecycleCleanup(ExecutionContext executionContext)

Description copied from interface: ExecutionLifecycleCleanable

Cleanup the resources allocated by this resource for the specified ExecutionContext.

Executes the cleanup at the end of the filter execution.

Specified by:

executeExecutionLifecycleCleanup in interface ExecutionLifecycleCleanable

Parameters:

executionContext - The ExecutionContext.

closeCondition

protected boolean closeCondition(ExecutionContext executionContext)

getOutputStream

public static OutputStream getOutputStream(String resourceName,
                                           ExecutionContext executionContext)
                                    throws SmooksException

Get an OutputStream to the named Resource.

Parameters:

resourceName - The resource name.

executionContext - The current ExececutionContext.

Returns:

An OutputStream to the named Resource.

Throws:

SmooksException - Unable to access OutputStream.

getOutputWriter

public static Writer getOutputWriter(String resourceName,
                                     ExecutionContext executionContext)
                              throws SmooksException

Get a Writer to the named OutputStream Resource.

Wraps the OutputStream in a Writer. Uses the "writerEncoding" param to set the encoding on the Writer.

Parameters:

resourceName - The resource name.

executionContext - The current ExececutionContext.

Returns:

A Writer to the named OutputStream Resource.

Throws:

SmooksException - Unable to access OutputStream.

closeResource

protected void closeResource(ExecutionContext executionContext)

Close the resource output stream.

Classes overriding this method must call super on this method. This will probably need to be done before performing any aditional cleanup.

Parameters:

executionContext - Smooks ExecutionContext