LwjgFontUtil.java

/**
 *  The MIT License (MIT)
 *
 *  Copyright (c) 2014 momokan (http://lwjgfont.chocolapod.net)
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in all
 *  copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 *  SOFTWARE.
 */
package net.chocolapod.lwjgfont.packager;

import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;

import org.lwjgl.LWJGLUtil;

public class LwjgFontUtil {
	public static final Charset			CHARSET_UTF8 = Charset.forName("utf-8");

	public static boolean isEmpty(String value) {
		return ((value == null) || (value.length() <= 0));
	}
	public static boolean isEmpty(String[] values) {
		return ((values == null) || (values.length <= 0));
	}
	
	public static String capitalize(String value) {
		String	capitalized = "";

		if (isEmpty(value)) {
			return "";
		}

		value = value.toLowerCase();

		capitalized = value.substring(0, 1).toUpperCase();

		if (1 < value.length()) {
			capitalized += value.substring(1);
		}

		return capitalized;
	}

	public static String trimExtention(String fileName) {
		int		p = fileName.lastIndexOf('.');
		
		if (p <= 0) {
			return fileName;
		} else {
			return fileName.substring(0, p);
		}
	}

	public static File prepareDirectory(String ...dirPaths) throws IOException {
		String		fullDirPath = "";
		
		if (!LwjgFontUtil.isEmpty(dirPaths)) {
			for (String dirPath: dirPaths) {
				if (dirPath == null) {
					continue;
				}
				if (!LwjgFontUtil.isEmpty(fullDirPath)) {
					fullDirPath += File.separator;
				}
				fullDirPath += dirPath;
			}
		}
		
		File		dir = new File(fullDirPath);

		if (fullDirPath.length() <= 0) {
			//	ignored
		} else if (dir.isFile()) {
			throw new IOException("output directory is a file: " + dir.getAbsolutePath());
		} else if ((!dir.exists()) && (!dir.mkdirs())) {
			throw new IOException("cannot make output directory: " + dir.getAbsolutePath());
		}
		
		return dir;
	}
	
	public static File deleteFile(String filePath) {
		return deleteFile(new File(filePath));
	}
	public static File deleteFile(File file) {
		if (!file.exists()) {
			return null;
		}

		try {
			//	安全対策として、カレントディレクトリ以下でなければ削除させない
			String		currentDirPath = new File("").getCanonicalPath() + File.separator;
			String		targetFilePath = file.getCanonicalPath();

			if (!targetFilePath.startsWith(currentDirPath)) {
				return null;
			} else if (targetFilePath.substring(0, currentDirPath.length()).length() <= 0) {
				return null;
			}
		} catch (IOException e) {
			throw new RuntimeException("Cannot get cannonical path for " + file.getPath());
		}

		if (file.isDirectory()) {
			for (File child: file.listFiles()) {
				deleteFile(child);
			}
			file.delete();
		} else {
			file.delete();
		}

		return file;
	}

	public static String toDirectoryPath(String directoryPath) {
		if (LwjgFontUtil.isEmpty(directoryPath)) {
			return "";
		}
		
		if (!directoryPath.endsWith(File.separator)) {
			directoryPath += File.separator;
		}

		return directoryPath;
	}


}