org.apache.tapestry5.internal.structure

## Interface ComponentPageElementResources

- All Superinterfaces:
    ContextValueEncoder, OperationTracker
  All Known Implementing Classes:
    ComponentPageElementResourcesImpl

      public interface ComponentPageElementResources
      extends ContextValueEncoder, OperationTracker

  Provides access to common methods of various services, needed by implementations of `ComponentPageElement` and `InternalComponentResources`.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `<S,T> T` | `coerce(S input, Class<T> targetType)` Performs a coercion from an input type to a desired output type.
    `Link` | `createComponentEventLink(ComponentResources resources, String eventType, boolean forForm, Object... context)` Creates a link on behalf of a component.
    `Link` | `createPageRenderLink(Class pageClass, boolean override, Object... context)` Creates a page render request link to render a specific page.
    `Link` | `createPageRenderLink(String pageName, boolean override, Object... context)` Creates a page render request link to render a specific page.
    `<T> PerThreadValue<T>` | `createPerThreadValue()` Wrapper around `PerthreadManager.createValue()`.
    `org.slf4j.Logger` | `getEventLogger(org.slf4j.Logger componentLogger)` Returns the event logger for the provided component logger.
    `Messages` | `getMessages(ComponentModel componentModel)` Used to obtain a `Messages` instance for a particular component.
    `ComponentResourceSelector` | `getSelector()` Returns the selector associated with this resources.
    `boolean` | `isRenderTracingEnabled()` Returns true if component element tracing is enabled.
    `Class` | `toClass(String className)` Gets the Class instance for then give name.

    - ### Methods inherited from interface org.apache.tapestry5.services.ContextValueEncoder

      `toClient, toValue`

    - ### Methods inherited from interface org.apache.tapestry5.ioc.OperationTracker

      `invoke, perform, run`

- - ### Method Detail

    - #### getSelector

          ComponentResourceSelector getSelector()

      Returns the selector associated with this resources.
      Since:
        5.3

    - #### getMessages

          Messages getMessages(ComponentModel componentModel)

      Used to obtain a `Messages` instance for a particular component. If the component extends from another component, then its localized properties will merge with its parent's properties (with the subclass overriding the super class on any conflicts).
      Parameters:
        `componentModel` -
      Returns:
        the message catalog for the component, in the indicated locale
      See Also:
        `ComponentMessagesSource`

    - #### coerce

          <S,T> T coerce(S input,
                         Class<T> targetType)

      Performs a coercion from an input type to a desired output type. When the target type is a primitive, the actual conversion will be to the equivalent wrapper type. In some cases, the TypeCoercer will need to search for an appropriate coercion, and may even combine existing coercions to form new ones; in those cases, the results of the search are cached.
      Type Parameters:
        `S` - source type (input)
        `T` - target type (output)
      Parameters:
        `input` -
        `targetType` - defines the target type
      Returns:
        the coerced value
      See Also:
        `TypeCoercer`

    - #### toClass

          Class toClass(String className)

      Gets the Class instance for then give name.
      Parameters:
        `className` - fully qualified class name
      Returns:
        the class instance
      See Also:
        `ComponentClassCache`

    - #### createComponentEventLink

          Link createComponentEventLink(ComponentResources resources,
                                        String eventType,
                                        boolean forForm,
                                        Object... context)

      Creates a link on behalf of a component.
      Parameters:
        `resources` - resources for the component
        `eventType` - type of event to create
        `forForm` - true if generating for a form submission
        `context` - additional event context associated with the link
      Returns:
        the link
      Since:
        5.1.0.0

    - #### createPageRenderLink

          Link createPageRenderLink(String pageName,
                                    boolean override,
                                    Object... context)

      Creates a page render request link to render a specific page.
      Parameters:
        `pageName` - the logical name of the page to link to
        `override` - if true, the context is used even if empty (normally, the target page is allowed to passivate, providing a context, when the provided context is empty)
        `context` - the activation context for the page. If omitted, the activation context is obtained from the target page
      Returns:
        link for a render request to the targetted page
      Since:
        5.1.0.0

    - #### createPageRenderLink

          Link createPageRenderLink(Class pageClass,
                                    boolean override,
                                    Object... context)

      Creates a page render request link to render a specific page. Using a page class, rather than a page name, is more refactoring safe (in the even the page is renamed or moved).
      Parameters:
        `pageClass` - identifies the page to link to
        `override` - if true, the context is used even if empty (normally, the target page is allowed to passivate, providing a context, when the provided context is empty)
        `context` - the activation context for the page. If omitted, the activation context is obtained from the target page
      Returns:
        link for a render request to the targetted page
      Since:
        5.1

    - #### getEventLogger

          org.slf4j.Logger getEventLogger(org.slf4j.Logger componentLogger)

      Returns the event logger for the provided component logger. The event logger is based on the component logger's name (which matches the component class name) with a "tapestry..events." prefix.
      Parameters:
        `componentLogger` - provides base name for logger
      Returns:
        the logger

    - #### createPerThreadValue

          <T> PerThreadValue<T> createPerThreadValue()

      Wrapper around `PerthreadManager.createValue()`.
      Since:
        5.2.0

    - #### isRenderTracingEnabled

          boolean isRenderTracingEnabled()

      Returns true if component element tracing is enabled. When enabled, rendering of the component produces additional comments to identify what component and stage is rendering.
      Since:
        5.4

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