AssetPublisherRenderParametersPortletFilter.java

/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.asset.publisher.web.internal.portlet.filter;

import com.liferay.asset.publisher.web.constants.AssetPublisherPortletKeys;
import com.liferay.portal.kernel.theme.ThemeDisplay;
import com.liferay.portal.kernel.util.ParamUtil;
import com.liferay.portal.kernel.util.Portal;
import com.liferay.portal.kernel.util.Validator;
import com.liferay.portal.kernel.util.WebKeys;
import com.liferay.portlet.RenderParametersPool;

import java.io.IOException;

import javax.portlet.PortletException;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;
import javax.portlet.filter.FilterChain;
import javax.portlet.filter.FilterConfig;
import javax.portlet.filter.PortletFilter;
import javax.portlet.filter.RenderFilter;

import javax.servlet.http.HttpServletRequest;

import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;

/**
 * @author Juergen Kappler
 */
@Component(
	immediate = true,
	property = {
		"javax.portlet.name=" + AssetPublisherPortletKeys.ASSET_PUBLISHER
	},
	service = PortletFilter.class
)
public class AssetPublisherRenderParametersPortletFilter
	implements RenderFilter {

	@Override
	public void destroy() {
	}

	@Override
	public void doFilter(
			RenderRequest renderRequest, RenderResponse renderResponse,
			FilterChain filterChain)
		throws IOException, PortletException {

		HttpServletRequest httpServletRequest = _portal.getHttpServletRequest(
			renderRequest);

		long categoryId = ParamUtil.getLong(renderRequest, "categoryId");
		String tag = ParamUtil.getString(renderRequest, "tag");

		if ((categoryId > 0) || Validator.isNotNull(tag)) {
			clearRenderRequestParameters(renderRequest, httpServletRequest);
		}

		filterChain.doFilter(renderRequest, renderResponse);
	}

	@Override
	public void init(FilterConfig filterConfig) {
	}

	protected void clearRenderRequestParameters(
		RenderRequest renderRequest, HttpServletRequest httpServletRequest) {

		ThemeDisplay themeDisplay = (ThemeDisplay)renderRequest.getAttribute(
			WebKeys.THEME_DISPLAY);

		String portletId = _portal.getPortletId(renderRequest);

		RenderParametersPool.clear(
			httpServletRequest, themeDisplay.getPlid(), portletId);
	}

	@Reference
	private Portal _portal;

}