org.rapidoid.widget.AbstractWidget Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of rapidoid-widget Show documentation
Rapidoid Widget
The newest version!
package org.rapidoid.widget;

/*
 * #%L
 * rapidoid-widget
 * %%
 * Copyright (C) 2014 - 2015 Nikolche Mihajlovski and contributors
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import org.rapidoid.annotation.Authors;
import org.rapidoid.annotation.Since;
import org.rapidoid.ctx.Ctxs;
import org.rapidoid.html.TagWidget;
import org.rapidoid.html.impl.TagRenderer;
import org.rapidoid.http.HttpExchange;
import org.rapidoid.util.Constants;
import org.rapidoid.util.U;

@Authors("Nikolche Mihajlovski")
@Since("2.0.0")
public abstract class AbstractWidget extends BootstrapWidgets implements TagWidget, Constants {

	private final int widgetNum = getWidgetNumber(this);

	private HttpExchange x;

	protected HttpExchange ctx() {
		if (x == null) {
			x = Ctxs.ctx().exchange();
		}
		U.notNull(x, "HTTP exchange");
		return x;
	}

	protected abstract Object render();

	@Override
	public final Object render(HttpExchange x) {
		this.x = x;
		return render();
	}

	public String widgetId() {
		return getClass().getSimpleName() + widgetNum;
	}

	private static int getWidgetNumber(AbstractWidget widget) {
		if (!Ctxs.hasContext()) {
			return -1;
		}

		HttpExchange x = Ctxs.ctx().exchange();
		String extrName = "widget_counter_" + widget.getClass().getSimpleName();
		Integer counter = U.or((Integer) x.tmp(extrName, null), 1);
		x.tmps().put(extrName, counter + 1);
		return counter;
	}

	@Override
	public String toString() {
		return TagRenderer.get().toHTML(this, x);
	}

}