DLAppUtil.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.portlet.documentlibrary.util;

import com.liferay.portal.kernel.repository.model.FileVersion;
import com.liferay.portal.kernel.util.ContentTypes;
import com.liferay.portal.kernel.util.FileUtil;
import com.liferay.portal.kernel.util.GetterUtil;
import com.liferay.portal.kernel.util.MimeTypesUtil;
import com.liferay.portal.kernel.util.StringPool;
import com.liferay.portal.kernel.util.Validator;

import java.io.File;

/**
 * @author Alexander Chow
 */
public class DLAppUtil {

	public static String getExtension(String title, String sourceFileName) {
		String extension = FileUtil.getExtension(sourceFileName);

		if (Validator.isNull(extension)) {
			extension = FileUtil.getExtension(title);
		}

		return extension;
	}

	public static String getMimeType(
		String sourceFileName, String mimeType, String title, File file) {

		if (Validator.isNull(mimeType) ||
			mimeType.equals(ContentTypes.APPLICATION_OCTET_STREAM)) {

			String extension = getExtension(title, sourceFileName);

			mimeType = MimeTypesUtil.getContentType(file, "A." + extension);
		}

		return mimeType;
	}

	public static String getSourceFileName(FileVersion fileVersion) {
		String extension = fileVersion.getExtension();

		if (Validator.isNull(extension)) {
			return fileVersion.getTitle();
		}

		String suffix = StringPool.PERIOD + extension;

		String title = fileVersion.getTitle();

		if (title.endsWith(suffix)) {
			return title;
		}

		return title + suffix;
	}

	public static boolean isMajorVersion(
		FileVersion previousFileVersion, FileVersion currentFileVersion) {

		long currentVersion = GetterUtil.getLong(
			currentFileVersion.getVersion());
		long previousVersion = GetterUtil.getLong(
			previousFileVersion.getVersion());

		if ((currentVersion - previousVersion) >= 1) {
			return true;
		}

		return false;
	}

}