GetFileEntryMVCRenderCommand.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.document.library.web.internal.portlet.action;

import com.liferay.document.library.kernel.exception.NoSuchFileEntryException;
import com.liferay.document.library.kernel.exception.NoSuchFileVersionException;
import com.liferay.portal.kernel.exception.NoSuchRepositoryEntryException;
import com.liferay.portal.kernel.portlet.bridges.mvc.MVCRenderCommand;
import com.liferay.portal.kernel.repository.model.FileEntry;
import com.liferay.portal.kernel.repository.model.FileVersion;
import com.liferay.portal.kernel.security.auth.PrincipalException;
import com.liferay.portal.kernel.servlet.SessionErrors;
import com.liferay.portal.kernel.util.ParamUtil;
import com.liferay.portal.kernel.util.Validator;
import com.liferay.portal.kernel.util.WebKeys;

import javax.portlet.PortletException;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;

/**
 * @author Sergio González
 */
public abstract class GetFileEntryMVCRenderCommand implements MVCRenderCommand {

	@Override
	public String render(
			RenderRequest renderRequest, RenderResponse renderResponse)
		throws PortletException {

		try {
			FileEntry fileEntry = ActionUtil.getFileEntry(renderRequest);

			renderRequest.setAttribute(
				WebKeys.DOCUMENT_LIBRARY_FILE_ENTRY, fileEntry);

			FileVersion fileVersion = ActionUtil.getFileVersion(
				renderRequest, fileEntry);

			String version = ParamUtil.getString(renderRequest, "version");

			if (Validator.isNotNull(version)) {
				renderRequest.setAttribute(
					WebKeys.DOCUMENT_LIBRARY_FILE_VERSION, fileVersion);
			}
		}
		catch (Exception e) {
			if (e instanceof NoSuchFileEntryException ||
				e instanceof NoSuchFileVersionException ||
				e instanceof NoSuchRepositoryEntryException ||
				e instanceof PrincipalException) {

				SessionErrors.add(renderRequest, e.getClass());

				return "/document_library/error.jsp";
			}
			else {
				throw new PortletException(e);
			}
		}

		return getPath();
	}

	protected abstract String getPath();

}