com.github.abhinavmishra14.aws.util.AWSUtil.java Source code

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Here is the source code for com.github.abhinavmishra14.aws.util.AWSUtil.java

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/*
 * Created By: Abhinav Kumar Mishra
 * Copyright © 2015. Abhinav Kumar Mishra. 
 * All rights reserved.
 * 
 * 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.github.abhinavmishra14.aws.util;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Calendar;
import java.util.Date;

import org.apache.commons.io.FileUtils;

/**
 * The Class AWSUtil.
 */
public final class AWSUtil {

    /**
     * Instantiates a new AWS util.
     */
    private AWSUtil() {
        super();
    }

    /**
     * Creates the temp file from stream.
     *
     * @param inputStream the in stream
     * @return the file
     * @throws IOException Signals that an I/O exception has occurred.
     */
    public static File createTempFileFromStream(final InputStream inputStream) throws IOException {
        final File tempFile = File.createTempFile(AWSUtilConstants.TEMP_FILE_PREFIX,
                AWSUtilConstants.TEMP_FILE_SUFFIX);
        FileUtils.copyInputStreamToFile(inputStream, tempFile);
        return tempFile;
    }

    /**
     * Delete temp file.
     *
     * @param tempFile the temp file
     * @return true, if successful
     * @throws IOException Signals that an I/O exception has occurred.
     */
    public static boolean deleteTempFile(final File tempFile) throws IOException {
        boolean isDeleted = false;
        if (tempFile != null && tempFile.exists()) {
            isDeleted = tempFile.delete();
        }
        return isDeleted;
    }

    /**
     * Not null.
     *
     * @param parameterValue the parameter value
     * @param errorMessage the error message
     */
    public static void notNull(final Object parameterValue, final String errorMessage) {
        if (parameterValue == null) {
            throw new IllegalArgumentException(errorMessage);
        }
    }

    /**
     * Gets the expiry date.<br/>
     * Expire by parameter takes input as Calendar.Month, Calendar.Hour, Calendar.Minute etc. 
     *
     * @param expireBy the expire by 
     * @param expireByValue the expire by value
     * @return the expiry date
     * @see Calendar
     */
    public static Date getExpiryDate(final int expireBy, final int expireByValue) {
        final Date currentDate = new Date();
        final Calendar cal = Calendar.getInstance();
        cal.setTime(currentDate);
        cal.add(expireBy, expireByValue);
        return cal.getTime();
    }
}