Configuration dialog generation from array @Parameters fails

[stelfrich]

MyBuddyDemoPlugin does not generate a correct configuration dialog with the @Paramters, instead:

[gab1one]

I did some debugging and found this bug is caused by array parameters.

  @Parameter
        private double[] testDouble;

will not work, but

@Parameter
        private double testDouble;

will.

This bug occurs both within the fragmentDemo and buddyDemo projects, so I don't think it is caused by the different way those plugins are discovered.

[imagejan]

I stumbled upon this issue because I have a plugin that requires both a double[] input and some "normal" inputs (i.e. numbers, booleans, etc.).

After quite some headache, I discovered that this might be because for double[] inputs (while supported via column binding), the SwingInputHarvester throws an exception here:

knip-imagej2/org.knime.knip.imagej2.core/src/org/knime/knip/imagej2/core/imagejdialog/DialogComponentImageJDlg.java

Lines 97 to 103 in 3812f9b

	try {
	harvester.buildPanel(m_inputPanel, harvesterModule);
	} catch (final ModuleException e) {
	LOGGER.error("ImageJ plugin creation for plugin " + harvesterModule.getDelegateObject()
	+ " failed during the ImageJ dialog creation.");
	e.printStackTrace();
	}

... so the "ImageJ Dialog" part of the input dialog cannot be rendered.

---

I figured that a workaround is to declare the double[] parameter as required = false, so that the input harvester is happy even if it cannot generate a widget for this parameter.