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package org.apache.juneau.rest.beans;

import java.util.*;

import org.apache.juneau.rest.*;
import org.apache.juneau.rest.servlet.*;

/**
 * A POJO structure that describes the list of child resources associated with a resource.
 *
 * <p>
 * Typically used in top-level GET methods of router resources to render a list of available child resources.
 *
 * <ul class='seealso'>
 * 	<li class='link'>{@doc jrs.UtilityBeans}
 * 	<li class='jic'>{@link BasicGroupOperations}
 * 	<li class='extlink'>{@source}
 * </ul>
 *
 * @serial exclude
 */
public class ChildResourceDescriptions extends ResourceDescriptions {

	//-----------------------------------------------------------------------------------------------------------------
	// Static
	//-----------------------------------------------------------------------------------------------------------------

	private static final long serialVersionUID = 1L;

	/**
	 * Static creator.
	 *
	 * @param req The HTTP servlet request.
	 * @return A new {@link ChildResourceDescriptions} bean.
	 */
	public static ChildResourceDescriptions of(RestRequest req) {
		return new ChildResourceDescriptions(req);
	}

	//-----------------------------------------------------------------------------------------------------------------
	// Instance
	//-----------------------------------------------------------------------------------------------------------------

	/**
	 * Constructor.
	 *
	 * @param req The HTTP servlet request.
	 */
	public ChildResourceDescriptions(RestRequest req) {
		this(req.getContext(), req, false);
	}

	/**
	 * Constructor.
	 *
	 * @param context The servlet context that this bean describes.
	 * @param req The HTTP servlet request.
	 */
	public ChildResourceDescriptions(RestContext context, RestRequest req) {
		this(context, req, false);
	}

	/**
	 * Constructor.
	 *
	 * @param context The servlet context that this bean describes.
	 * @param req The HTTP servlet request.
	 * @param sort
	 * 	If <jk>true</jk>, list will be ordered by name alphabetically.
	 * 	Default is to maintain the order as specified in the annotation.
	 */
	public ChildResourceDescriptions(RestContext context, RestRequest req, boolean sort) {
		for (Map.Entry<String,RestContext> e : context.getRestChildren().asMap().entrySet()) {
			String title = null;
			try {
				title = e.getValue().getSwagger(req.getLocale()).map(x -> x == null ? null : x.getInfo()).map(x -> x == null ? null : x.getTitle()).orElse(null);
			} catch (Exception e1) {
				title = e1.getLocalizedMessage();
			}
			add(new ResourceDescription(e.getKey(), title));
		}
		if (sort)
			Collections.sort(this);
	}

	/**
	 * Bean constructor.
	 */
	public ChildResourceDescriptions() {
		super();
	}
}
