Using Upload inside a component

[Imants Firsts <im...@inbox.lv>]

I would like to create a component, which I could add
to AppPropertyEditBlocks and would be able to edit
entity fields of type MyFile by utilizing tapestry
Upload component to upload the file.

AppPropertyEditBlocks.tml:
<t:block id="myfile">
  <t:label for="myfileField"/>
  <input t:id="myfileField"/>
</t:block>

AppPropertyEditBlocks.java:
@Component(parameters = {"value=context.propertyValue",
"label=prop:context.label",
"clientId=prop:context.propertyId"})
private MyFileField myfileField;

MyFileField.tml:
<input t:type="upload" t:value="uploadedFile"
xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd"/>

public class MyFileField extends AbstractField {
	@Parameter
	private MyFile value;

	@Property
	private UploadedFile uploadedFile;
	...
}

I would like to execute the following code on form
submission, so that my bound value parameter is updated
with just uploaded file.
if (uploadedFile != null) {
  value = new MyFile(uploadedFile);
}

I have tried 2 solutions but none of them works:
1) This fails because processSubmission() for tapestry
Upload component is not called yet and thus
uploadedFile is always null.
protected void processSubmission(String elementName) {
  if (uploadedFile != null) {
    value = new MyFile(uploadedFile);
  }
}
2) In this case uploadedFile is filled by tapestry
Upload, but the code fails, because value is bound to a
field, which uses PropertyContext, which is already
popped out of the Environment, when the defer() executes.

protected void processSubmission(String elementName) {
  formSupport.defer(new Runnable() {
    public void run() {
      if (uploadedFile != null) {
        value = new MyFile(uploadedFile);
      }
    }
  });
}

Any solutions?

Thanks in advance,
Imants


---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
For additional commands, e-mail: users-help@tapestry.apache.org