DocumentLibraryFieldRenderer.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.dynamic.data.mapping.storage.impl;

import com.liferay.document.library.kernel.exception.NoSuchFileEntryException;
import com.liferay.document.library.kernel.service.DLAppServiceUtil;
import com.liferay.dynamic.data.mapping.storage.BaseFieldRenderer;
import com.liferay.dynamic.data.mapping.storage.Field;
import com.liferay.portal.kernel.json.JSONException;
import com.liferay.portal.kernel.json.JSONFactoryUtil;
import com.liferay.portal.kernel.json.JSONObject;
import com.liferay.portal.kernel.language.LanguageUtil;
import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.repository.model.FileEntry;
import com.liferay.portal.kernel.security.auth.PrincipalException;
import com.liferay.portal.kernel.util.StringPool;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portal.kernel.util.Validator;

import java.io.Serializable;

import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

/**
 * @author Bruno Basto
 */
public class DocumentLibraryFieldRenderer extends BaseFieldRenderer {

	@Override
	protected String doRender(Field field, Locale locale) throws Exception {
		List<String> values = new ArrayList<>();

		for (Serializable value : field.getValues(locale)) {
			String valueString = String.valueOf(value);

			if (Validator.isNull(valueString)) {
				continue;
			}

			values.add(handleJSON(valueString, locale));
		}

		return StringUtil.merge(values, StringPool.COMMA_AND_SPACE);
	}

	@Override
	protected String doRender(Field field, Locale locale, int valueIndex) {
		Serializable value = field.getValue(locale, valueIndex);

		if (Validator.isNull(value)) {
			return StringPool.BLANK;
		}

		return handleJSON(String.valueOf(value), locale);
	}

	protected String handleJSON(String json, Locale locale) {
		JSONObject jsonObject = null;

		try {
			jsonObject = JSONFactoryUtil.createJSONObject(json);
		}
		catch (JSONException jsone) {
			if (_log.isDebugEnabled()) {
				_log.debug("Unable to parse JSON", jsone);
			}

			return StringPool.BLANK;
		}

		long fileEntryGroupId = jsonObject.getLong("groupId");
		String fileEntryUUID = jsonObject.getString("uuid");

		try {
			FileEntry fileEntry = DLAppServiceUtil.getFileEntryByUuidAndGroupId(
				fileEntryUUID, fileEntryGroupId);

			return fileEntry.getTitle();
		}
		catch (Exception e) {
			if (e instanceof NoSuchFileEntryException ||
				e instanceof PrincipalException) {

				return LanguageUtil.format(
					locale, "is-temporarily-unavailable", "content");
			}
		}

		return StringPool.BLANK;
	}

	private static final Log _log = LogFactoryUtil.getLog(
		DocumentLibraryFieldRenderer.class);

}