net.sf.tacos.ajax.impl
Class FormComponentEventWorker

java.lang.Object
  net.sf.tacos.ajax.impl.FormComponentEventWorker

All Implemented Interfaces:

org.apache.tapestry.enhance.EnhancementWorker

public class FormComponentEventWorker
extends Object
implements org.apache.tapestry.enhance.EnhancementWorker

Looks for the existance of any "eventListener" parameters to IFormComponent and adds render contributions to the component for linking javascript events to ajax actions.

Author:

jkuhnert

Field Summary

protected AjaxWebRequest	ajaxRequest injected ajex request reference
static String	EVENT_PARAMETER event listener parameter name
protected org.apache.tapestry.services.ExpressionEvaluator	expressionEvaluator injected ognl parser
static String	FORMATTER_PARAMETER formatting parameter name
protected static String	RENDER_METHOD render method of IRender
protected static Class[]	RENDER_PARAMS parameters to render method in IRender
protected org.apache.tapestry.engine.IScriptSource	scriptSource injected script source.

Constructor Summary

FormComponentEventWorker()

Method Summary

protected String	buildMethodCallBack(org.apache.tapestry.spec.IComponentSpecification spec, MethodSignature method, MethodSignature accessor, MethodSignature exprAccessor, MethodSignature scriptSourceAccessor) Enhances the AbstractFormComponent.renderFormComponent(org.apache.tapestry.IMarkupWriter, org.apache.tapestry.IRequestCycle) method of all form fields to handle any possible defferred script actions.
protected MethodSignature	createExpressionAccessor(org.apache.tapestry.enhance.EnhancementOperation op, org.apache.tapestry.spec.IComponentSpecification spec) Creates an injected ExpressionEvaluator field into the component which will be used by enhanced methods to generate ajax request links.
protected MethodSignature	createRequestAccessor(org.apache.tapestry.enhance.EnhancementOperation op, org.apache.tapestry.spec.IComponentSpecification spec) Creates an injected AjaxWebRequest field into the component which will be used by enhanced methods to use ajax resources.
protected MethodSignature	createScriptSourceAccessor(org.apache.tapestry.enhance.EnhancementOperation op, org.apache.tapestry.spec.IComponentSpecification spec) Creates an injected IScriptSource field into the component which will be used by enhanced methods to use Tapestry script sources.
void	performEnhancement(org.apache.tapestry.enhance.EnhancementOperation op, org.apache.tapestry.spec.IComponentSpecification spec)
void	setAjaxRequest(AjaxWebRequest ajaxRequest) Injected ajax request
void	setExpressionEvaluator(org.apache.tapestry.services.ExpressionEvaluator expressionEvaluator) Injected ognl parser
void	setScriptSource(org.apache.tapestry.engine.IScriptSource scriptSource) Injected script source

Methods inherited from class java.lang.Object

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

Field Detail

ajaxRequest

protected AjaxWebRequest ajaxRequest

injected ajex request reference

expressionEvaluator

protected org.apache.tapestry.services.ExpressionEvaluator expressionEvaluator

injected ognl parser

scriptSource

protected org.apache.tapestry.engine.IScriptSource scriptSource

injected script source.

EVENT_PARAMETER

public static final String EVENT_PARAMETER

event listener parameter name

See Also:

Constant Field Values

FORMATTER_PARAMETER

public static final String FORMATTER_PARAMETER

formatting parameter name

See Also:

Constant Field Values

RENDER_METHOD

protected static final String RENDER_METHOD

render method of IRender

See Also:

Constant Field Values

RENDER_PARAMS

protected static final Class[] RENDER_PARAMS

parameters to render method in IRender

Constructor Detail

FormComponentEventWorker

public FormComponentEventWorker()

Method Detail

performEnhancement

public void performEnhancement(org.apache.tapestry.enhance.EnhancementOperation op,
                               org.apache.tapestry.spec.IComponentSpecification spec)

Specified by:

performEnhancement in interface org.apache.tapestry.enhance.EnhancementWorker

createRequestAccessor

protected MethodSignature createRequestAccessor(org.apache.tapestry.enhance.EnhancementOperation op,
                                                org.apache.tapestry.spec.IComponentSpecification spec)

Creates an injected AjaxWebRequest field into the component which will be used by enhanced methods to use ajax resources.

Parameters:

op -

spec -

Returns:

createScriptSourceAccessor

protected MethodSignature createScriptSourceAccessor(org.apache.tapestry.enhance.EnhancementOperation op,
                                                     org.apache.tapestry.spec.IComponentSpecification spec)

Creates an injected IScriptSource field into the component which will be used by enhanced methods to use Tapestry script sources.

Parameters:

op -

spec -

Returns:

createExpressionAccessor

protected MethodSignature createExpressionAccessor(org.apache.tapestry.enhance.EnhancementOperation op,
                                                   org.apache.tapestry.spec.IComponentSpecification spec)

Creates an injected ExpressionEvaluator field into the component which will be used by enhanced methods to generate ajax request links.

Parameters:

op -

spec -

Returns:

buildMethodCallBack

protected String buildMethodCallBack(org.apache.tapestry.spec.IComponentSpecification spec,
                                     MethodSignature method,
                                     MethodSignature accessor,
                                     MethodSignature exprAccessor,
                                     MethodSignature scriptSourceAccessor)

Enhances the AbstractFormComponent.renderFormComponent(org.apache.tapestry.IMarkupWriter, org.apache.tapestry.IRequestCycle) method of all form fields to handle any possible defferred script actions.

Parameters:

spec -

method -

accessor - Getter for ajax request

exprAccessor - Expression evaluator

scriptSourceAccessor - getter for script source.

Returns:

The javassist method body

setAjaxRequest

public void setAjaxRequest(AjaxWebRequest ajaxRequest)

Injected ajax request

Parameters:

ajaxRequest -

setExpressionEvaluator

public void setExpressionEvaluator(org.apache.tapestry.services.ExpressionEvaluator expressionEvaluator)

Injected ognl parser

Parameters:

expressionEvaluator -

setScriptSource

public void setScriptSource(org.apache.tapestry.engine.IScriptSource scriptSource)

Injected script source

Parameters:

scriptSource -