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package org.scijava.widget;

import java.util.ArrayList;
import java.util.List;

import org.scijava.AbstractContextual;
import org.scijava.convert.ConvertService;
import org.scijava.log.LogService;
import org.scijava.module.Module;
import org.scijava.module.ModuleException;
import org.scijava.module.ModuleItem;
import org.scijava.object.ObjectService;
import org.scijava.plugin.Parameter;

/**
 * Abstract superclass for {@link InputHarvester}s.
 * 

* An input harvester obtains a module's unresolved input parameter values from * the user. Parameters are collected using an {@link InputPanel} dialog box. *

* * @author Curtis Rueden * @param

The type of UI component housing the input panel itself. * @param The type of UI component housing each input widget. */ public abstract class AbstractInputHarvester extends AbstractContextual implements InputHarvester { @Parameter private LogService log; @Parameter private WidgetService widgetService; @Parameter private ObjectService objectService; @Parameter private ConvertService convertService; // -- InputHarvester methods -- @Override public void buildPanel(final InputPanel inputPanel, final Module module) throws ModuleException { final Iterable> inputs = module.getInfo().inputs(); final ArrayList models = new ArrayList<>(); for (final ModuleItem item : inputs) { final WidgetModel model = addInput(inputPanel, module, item); if (model != null) models.add(model); } // mark all models as initialized for (final WidgetModel model : models) model.setInitialized(true); // compute initial preview module.preview(); } // -- Helper methods -- private WidgetModel addInput(final InputPanel inputPanel, final Module module, final ModuleItem item) throws ModuleException { final String name = item.getName(); final boolean resolved = module.isInputResolved(name); if (resolved) return null; // skip resolved inputs final Class type = item.getType(); final WidgetModel model = widgetService.createModel(inputPanel, module, item, getObjects(type)); final Class widgetType = inputPanel.getWidgetComponentType(); final InputWidget widget = widgetService.create(model); if (widget == null) { log.debug("No widget found for input: " + model.getItem().getName()); } if (widget != null && widget.getComponentType() == widgetType) { @SuppressWarnings("unchecked") final InputWidget typedWidget = (InputWidget) widget; inputPanel.addWidget(typedWidget); return model; } if (item.isRequired()) { throw new ModuleException("A " + type.getSimpleName() + " is required but none exist."); } // item is not required; we can skip it return null; } /** Asks the object service and convert service for valid choices */ @SuppressWarnings("unchecked") private List getObjects(final Class type) { @SuppressWarnings("rawtypes") List compatibleInputs = new ArrayList(convertService.getCompatibleInputs(type)); compatibleInputs.addAll(objectService.getObjects(type)); return compatibleInputs; } }





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