org.apache.tapestry5.upload.components

## Class Upload

- java.lang.Object
- - org.apache.tapestry5.corelib.base.AbstractField
  - - org.apache.tapestry5.upload.components.Upload

- All Implemented Interfaces:
    ClientElement, Field

      @Events(value="validate")
      public class Upload
      extends AbstractField

  A component to upload a file.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static String` | `MULTIPART_ENCTYPE`

    - ### Fields inherited from class org.apache.tapestry5.corelib.base.AbstractField

      `cssClass, decorator, defaultProvider, disabled, environment, fieldValidationSupport, formSupport, javaScriptSupport, label, request, resources, validationTracker`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `Upload()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `afterRender(MarkupWriter writer)`
    `protected void` | `beginRender(MarkupWriter writer)` Render the upload tags.
    `UploadedFile` | `getValue()`
    `boolean` | `isRequired()` Returns false; most components do not support declarative validation.
    `protected void` | `processSubmission(String controlName)` Method implemented by subclasses to actually do the work of processing the submission of the form.

    - ### Methods inherited from class org.apache.tapestry5.corelib.base.AbstractField

      `decorateInsideField, getClientId, getControlName, getLabel, isDisabled, putPropertyNameIntoBeanValidationContext, removePropertyNameFromBeanValidationContext, setDecorator, setFormSupport`

    - ### Methods inherited from class java.lang.Object

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

- - ### Field Detail

    - #### MULTIPART_ENCTYPE

          public static final String MULTIPART_ENCTYPE

      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### Upload

          public Upload()

  - ### Method Detail

    - #### processSubmission

          protected void processSubmission(String controlName)

      Description copied from class: `AbstractField`
      Method implemented by subclasses to actually do the work of processing the submission of the form. The element's controlName property will already have been set. This method is only invoked if the field is not `disabled`.
      Specified by:
        `processSubmission` in class `AbstractField`
      Parameters:
        `controlName` - the control name of the rendered element (used to find the correct parameter in the request)

    - #### beginRender

          protected void beginRender(MarkupWriter writer)

      Render the upload tags.
      Parameters:
        `writer` - Writer to output markup

    - #### isRequired

          public boolean isRequired()

      Description copied from class: `AbstractField`
      Returns false; most components do not support declarative validation.
      Specified by:
        `isRequired` in interface `Field`
      Overrides:
        `isRequired` in class `AbstractField`
      Returns:
        true if a non-blank value is required for the field
      Since:
        5.4

    - #### afterRender

          public void afterRender(MarkupWriter writer)

    - #### getValue

          public UploadedFile getValue()

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