org.apache.tapestry.components
Class IfBean

java.lang.Object
  org.apache.hivemind.impl.BaseLocatable
      org.apache.tapestry.AbstractComponent
          org.apache.tapestry.form.AbstractFormComponent
              org.apache.tapestry.components.IfBean

All Implemented Interfaces:

org.apache.hivemind.Locatable, org.apache.hivemind.LocationHolder, IFormComponent, IComponent, IDirectEvent, Component, IRender

public abstract class IfBean
extends AbstractFormComponent

Author:

mb

Field Summary

static Log	_log
static String	IF_VALUE_ATTRIBUTE

Fields inherited from class org.apache.tapestry.AbstractComponent

_body, _bodyCount

Constructor Summary

IfBean()

Method Summary

protected boolean	evaluateCondition(IRequestCycle cycle, IForm form, boolean cycleRewinding)
protected void	generateClientId() Overriden from AbstractFormComponent to handle cases where we're not being wrapped by a IForm component.
protected boolean	getCanTakeFocus() For component can not take focus.
abstract boolean	getCondition()
boolean	getConditionValue() Returns the value of the condition.
abstract IBinding	getConditionValueBinding()
abstract DataSqueezer	getDataSqueezer()
abstract String	getElement()
abstract IActionListener	getListener()
abstract boolean	getRenderTag()
abstract boolean	getVolatile()
boolean	isDisabled() Returns true if the component is disabled.
protected void	renderComponent(IMarkupWriter writer, IRequestCycle cycle) Invoked by AbstractComponent.render(IMarkupWriter, IRequestCycle) to actually render the component (with any parameter values already set).
protected void	renderFormComponent(IMarkupWriter writer, IRequestCycle cycle) Invoked from AbstractFormComponent.renderComponent(IMarkupWriter, IRequestCycle) to render the component.
protected void	rewindFormComponent(IMarkupWriter writer, IRequestCycle cycle) Invoked from AbstractFormComponent.renderComponent(IMarkupWriter, IRequestCycle) to rewind the component.

Methods inherited from class org.apache.tapestry.form.AbstractFormComponent

getForm, getIdParameter, getName, getRenderBodyOnRewind, isRequired, peekClientId, renderDelegateAttributes, renderDelegatePrefix, renderDelegateSuffix, setForm, setName, setName

Methods inherited from class org.apache.tapestry.AbstractComponent

addAsset, addBody, addComponent, checkActiveLock, cleanupAfterRender, enterActiveState, equals, finishLoad, finishLoad, getAsset, getAssets, getBeans, getBinding, getBindingNames, getBindings, getBody, getBodyCount, getBoundId, getClientId, getComponent, getComponents, getContainedComponent, getContainedRenderers, getContainer, getEventInvoker, getExtendedId, getId, getIdPath, getInnerRenderers, getListeners, getMessages, getNamespace, getPage, getRenderWorker, getSpecification, getSpecifiedId, getTemplateTagName, hasEvents, hashCode, isInActiveState, isParameterBound, isRendering, isStateful, pageEndRender, prepareForRender, render, renderBody, renderIdAttribute, renderInformalParameters, setBinding, setClientId, setContainedComponent, setContainer, setHasEvents, setId, setNamespace, setPage, setTemplateTagName, toString, triggerEvent

Methods inherited from class org.apache.hivemind.impl.BaseLocatable

getLocation, setLocation

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.tapestry.form.IFormComponent

getClientId, getDisplayName

Methods inherited from interface org.apache.tapestry.IComponent

addAsset, addBody, addComponent, enterActiveState, finishLoad, getAsset, getAssets, getBeans, getBinding, getBindingNames, getBindings, getComponent, getComponents, getContainedComponent, getContainer, getEventInvoker, getExtendedId, getId, getIdPath, getListeners, getMessages, getNamespace, getPage, getSpecification, getSpecifiedId, getTemplateTagName, isRendering, renderBody, setBinding, setClientId, setContainedComponent, setContainer, setId, setNamespace, setPage, setTemplateTagName

Methods inherited from interface org.apache.tapestry.IRender

render

Methods inherited from interface org.apache.hivemind.LocationHolder

setLocation

Methods inherited from interface org.apache.hivemind.Locatable

getLocation

Field Detail

_log

public static final Log _log

IF_VALUE_ATTRIBUTE

public static final String IF_VALUE_ATTRIBUTE

See Also:

Constant Field Values

Constructor Detail

IfBean

public IfBean()

Method Detail

getConditionValueBinding

public abstract IBinding getConditionValueBinding()

getCondition

public abstract boolean getCondition()

getVolatile

public abstract boolean getVolatile()

getElement

public abstract String getElement()

getRenderTag

public abstract boolean getRenderTag()

getListener

public abstract IActionListener getListener()

renderComponent

protected void renderComponent(IMarkupWriter writer,
                               IRequestCycle cycle)

Description copied from class: AbstractFormComponent

Invoked by AbstractComponent.render(IMarkupWriter, IRequestCycle) to actually render the component (with any parameter values already set). This implementation checks the rewinding state of the IForm that contains the component and forwards processing to either AbstractFormComponent.renderFormComponent(IMarkupWriter, IRequestCycle) or AbstractFormComponent.rewindFormComponent(IMarkupWriter, IRequestCycle). Those two are the methods that subclasses should implement.

Overrides:

renderComponent in class AbstractFormComponent

See Also:

AbstractComponent.renderComponent(org.apache.tapestry.IMarkupWriter, org.apache.tapestry.IRequestCycle)

generateClientId

protected void generateClientId()

Overriden from AbstractFormComponent to handle cases where we're not being wrapped by a IForm component.

This is basically a copy of the same method implemented in AbstractComponent.

Overrides:

generateClientId in class AbstractFormComponent

evaluateCondition

protected boolean evaluateCondition(IRequestCycle cycle,
                                    IForm form,
                                    boolean cycleRewinding)

getDataSqueezer

public abstract DataSqueezer getDataSqueezer()

isDisabled

public boolean isDisabled()

Description copied from interface: IFormComponent

Returns true if the component is disabled. This is important when the containing form is submitted, since disabled parameters do not update their bindings.

getConditionValue

public boolean getConditionValue()

Returns the value of the condition.

Returns:

the condition value

renderFormComponent

protected void renderFormComponent(IMarkupWriter writer,
                                   IRequestCycle cycle)

Description copied from class: AbstractFormComponent

Invoked from AbstractFormComponent.renderComponent(IMarkupWriter, IRequestCycle) to render the component.

Specified by:

renderFormComponent in class AbstractFormComponent

rewindFormComponent

protected void rewindFormComponent(IMarkupWriter writer,
                                   IRequestCycle cycle)

Description copied from class: AbstractFormComponent

Invoked from AbstractFormComponent.renderComponent(IMarkupWriter, IRequestCycle) to rewind the component. If the component is disabled this will not be invoked.

Specified by:

rewindFormComponent in class AbstractFormComponent

getCanTakeFocus

protected boolean getCanTakeFocus()

For component can not take focus.

Overrides:

getCanTakeFocus in class AbstractFormComponent