com.fredhopper.core.connector.index.FileUtils.java Source code

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Here is the source code for com.fredhopper.core.connector.index.FileUtils.java

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/*******************************************************************************
 * Copyright 2016 Fredhopper B.V.
 *
 * 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.
 *******************************************************************************/
package com.fredhopper.core.connector.index;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import org.apache.commons.lang3.RandomStringUtils;

public class FileUtils {

    private FileUtils() {
        //Utility classes, which are a collection of static members, are not meant to be instantiated.
    }

    public static void addToZipFile(final File file, final ZipOutputStream zos) throws IOException {

        final FileInputStream fis = new FileInputStream(file);
        final ZipEntry zipEntry = new ZipEntry(file.getName());
        zos.putNextEntry(zipEntry);

        final byte[] bytes = new byte[1024];
        int length;
        while ((length = fis.read(bytes)) >= 0) {
            zos.write(bytes, 0, length);
        }

        zos.closeEntry();
        fis.close();
    }

    /**
     * Create a subdirectory of parentDir. The name is a random 15 character alphabetic string
     *
     * @param parentDir
     * @throws IOException
     */
    public static File createRandomDirectory(final File parentDir) throws IOException {

        final String tempDirName = RandomStringUtils.randomAlphabetic(15);
        final File tempDir = new File(parentDir.getAbsoluteFile() + File.separator + tempDirName);
        org.apache.commons.io.FileUtils.forceMkdir(tempDir);
        return tempDir;

    }
}