Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2013 Peng fei Pan <sky@xiaopan.me>
 * 
 * Licensed 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.
 */

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

public class Main {

    public static void valiFileByWriteBefore(File file) throws IOException {
        valiFile(file);
        valiFileCanWrite(file);
    }

    public static void valiFile(File file)
            throws NullPointerException, FileNotFoundException, IllegalArgumentException {
        valiObjectIsNull(file, "file");
        valiFileIsExists(file);
        valiFileIsFile(file);
    }

    public static void valiFileCanWrite(File file) throws IOException {
        if (!file.canWrite()) {
            throw new IOException("For file '" + file.getName() + "' not write access!");
        }
    }

    public static void valiObjectIsNull(Object object, String objectName) throws NullPointerException {
        if (object == null) {
            throw new NullPointerException("Object '" + objectName + "' is null!");
        }
    }

    public static void valiFileIsExists(File file) throws FileNotFoundException {
        if (!file.exists()) {
            throw new FileNotFoundException("File '" + file.getName() + "' not found!");
        }
    }

    public static void valiFileIsFile(File file) throws IllegalArgumentException {
        if (!file.isFile()) {
            throw new IllegalArgumentException("File:'" + file.getName() + "'does not exist or not file!");
        }
    }
}