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SciJava Common is a shared library for SciJava software. It provides a plugin framework, with an extensible mechanism for service discovery, backed by its own annotation processor, so that plugins can be loaded dynamically. It is used by both ImageJ and SCIFIO.
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/*
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 * Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
 * Institute of Molecular Cell Biology and Genetics.
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 * modification, are permitted provided that the following conditions are met:
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 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
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package org.scijava;

import org.scijava.util.ClassUtils;
import org.scijava.util.MiscUtils;
import org.scijava.util.StringMaker;

/**
 * Abstract superclass of {@link UIDetails} implementations.
 * 
 * @author Curtis Rueden
 */
public abstract class AbstractUIDetails extends AbstractBasicDetails implements UIDetails {

	/** Path to this object's suggested position in the menu structure. */
	private MenuPath menuPath;

	/** Name of the menu structure to which the object belongs. */
	private String menuRoot = APPLICATION_MENU_ROOT;

	/** Resource path to this object's icon. */
	private String iconPath;

	/** Sort priority of the object. */
	private double priority = Priority.NORMAL_PRIORITY;

	/** Whether the object can be selected in the user interface. */
	private boolean selectable;

	/** The name of the selection group to which the object belongs. */
	private String selectionGroup;

	/** Whether the object is selected in the user interface. */
	private boolean selected;

	/** Whether the object is enabled in the user interface. */
	private boolean enabled = true;

	/** Whether the object is visible in the user interface. */
	private boolean visible = true;

	// -- Object methods --

	@Override
	public String toString() {
		final StringMaker sm = new StringMaker();
		sm.append(super.toString());
		sm.append("menu", menuPath == null ? null : menuPath.getMenuString());
		sm.append("iconPath", iconPath);
		sm.append("priority", priority, Integer.MAX_VALUE);
		if (selectable) {
			sm.append("selectionGroup", selectionGroup);
			sm.append("selected", selected);
		}
		sm.append("enabled", enabled);
		return sm.toString();
	}

	// -- UIDetails methods --

	@Override
	public String getTitle() {
		// use object label, if available
		if (getLabel() != null && !getLabel().isEmpty()) return getLabel();

		// use name of leaf menu item, if available
		if (menuPath != null && menuPath.size() > 0) {
			final MenuEntry menuLeaf = menuPath.getLeaf();
			final String menuName = menuLeaf.getName();
			if (menuName != null && !menuName.isEmpty()) return menuName;
		}

		// use object name, if available
		if (getName() != null && !getName().isEmpty()) return getName();

		// use the unique identifier, if available
		if (this instanceof Identifiable) {
			final String id = ((Identifiable) this).getIdentifier();
			if (id != null) return id;
		}

		// use class name as a last resort
		return getClass().getSimpleName();
	}

	@Override
	public MenuPath getMenuPath() {
		return menuPath;
	}

	@Override
	public String getMenuRoot() {
		return menuRoot;
	}

	@Override
	public String getIconPath() {
		return iconPath;
	}

	@Override
	public boolean isEnabled() {
		return enabled;
	}

	@Override
	public boolean isVisible() {
		return visible;
	}

	@Override
	public boolean isSelectable() {
		return selectable;
	}

	@Override
	public String getSelectionGroup() {
		return selectionGroup;
	}

	@Override
	public boolean isSelected() {
		return selected;
	}

	@Override
	public void setMenuPath(final MenuPath menuPath) {
		if (menuPath == null) {
			this.menuPath = new MenuPath();
		}
		else {
			this.menuPath = menuPath;
		}
	}

	@Override
	public void setMenuRoot(final String menuRoot) {
		this.menuRoot = menuRoot;
	}

	@Override
	public void setIconPath(final String iconPath) {
		this.iconPath = iconPath;
	}

	@Override
	public void setEnabled(final boolean enabled) {
		this.enabled = enabled;
	}

	@Override
	public void setVisible(final boolean visible) {
		this.visible = visible;
	}

	@Override
	public void setSelectable(final boolean selectable) {
		this.selectable = selectable;
	}

	@Override
	public void setSelectionGroup(final String selectionGroup) {
		this.selectionGroup = selectionGroup;
	}

	@Override
	public void setSelected(final boolean selected) {
		this.selected = selected;
	}

	// -- Prioritized methods --

	@Override
	public double getPriority() {
		return priority;
	}

	@Override
	public void setPriority(final double priority) {
		this.priority = priority;
	}

	// -- Comparable methods --

	@Override
	public int compareTo(final Prioritized that) {
		if (that == null) return 1;

		// compare priorities
		final int priorityCompare = Priority.compare(this, that);
		if (priorityCompare != 0) return priorityCompare;

		// compare classes
		final int classCompare = ClassUtils.compare(getClass(), that.getClass());
		if (classCompare != 0) return classCompare;

		if (!(that instanceof UIDetails)) return 1;
		final UIDetails uiDetails = (UIDetails) that;

		// compare names
		final String thisName = getName();
		final String thatName = uiDetails.getName();
		final int nameCompare = MiscUtils.compare(thisName, thatName);
		if (nameCompare != 0) return nameCompare;

		// compare titles
		final String thisTitle = getTitle();
		final String thatTitle = uiDetails.getTitle();
		return MiscUtils.compare(thisTitle, thatTitle);
	}

}