org.apache.ctakes.jdl.common.FileUtil.java Source code

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Here is the source code for org.apache.ctakes.jdl.common.FileUtil.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.ctakes.jdl.common;

import java.io.File;
import java.io.IOException;

import org.apache.commons.lang.SystemUtils;

/**
 * Utility to get a file.
 * 
 * @author mas
 */
public final class FileUtil {
    private FileUtil() {
    }

    /**
     * @return the javaClassPaths
     */
    public static String[] getJavaClassPaths() {
        return SystemUtils.JAVA_CLASS_PATH.split(SystemUtils.PATH_SEPARATOR);
    }

    /**
     * @param fileName
     *            the name of the file
     * @return the file if exist in one of all the javaClassPaths otherwise null
     */
    public static File getFile(final String fileName) {
        File file = new File(fileName);
        if (file.exists()) {
            return file;
        }
        for (String token : getJavaClassPaths()) {
            file = new File(token + SystemUtils.FILE_SEPARATOR + fileName);
            if (file.exists()) {
                return file;
            }
        }
        return null;
    }

    /**
     * @param file
     *            the file to get
     * @param defaultString
     *            the defaultString to return if the file is null
     * @return the canonical pathname string
     */
    public static String getCanonical(File file, String defaultString) {
        try {
            return (file == null) ? defaultString : file.getCanonicalPath();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return defaultString;
    }

    /**
     * @param file
     *            the file to get
     * @return the canonical pathname string or USER_DIR if the file is null
     */
    public static String getCanonical(File file) {
        return getCanonical(file, SystemUtils.USER_DIR);
    }

    /**
     * @param filePath
     *            the filePath of the file
     * @param fileName
     *            the fileName of the file
     * @return the canonical pathname string
     */
    public static String fullPath(File filePath, String fileName) {
        return getCanonical(filePath) + SystemUtils.FILE_SEPARATOR + fileName;
    }
}