com.bbva.kltt.apirest.core.web.Utilities.java Source code

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Here is the source code for com.bbva.kltt.apirest.core.web.Utilities.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 com.bbva.kltt.apirest.core.web;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.nio.file.Files;
import java.nio.file.LinkOption;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.concurrent.atomic.AtomicLong;

import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.bbva.kltt.apirest.core.util.APIRestGeneratorException;
import com.bbva.kltt.apirest.core.util.ConstantsAnt;
import com.bbva.kltt.apirest.core.util.ConstantsInput;
import com.bbva.kltt.apirest.core.util.FilesUtility;

/**
 * ------------------------------------------------
 * @author Francisco Manuel Benitez Chico
 * ------------------------------------------------
 */
public final class Utilities {
    /** Logger of the class */
    private static final Logger LOGGER = LoggerFactory.getLogger(Utilities.class);

    /** Atomic Long - Temporary Directory - Suffix */
    private static AtomicLong TEMP_FILE_SUFFIX = new AtomicLong();

    /**
     * Private constructor
     */
    private Utilities() {
        // Empty constructor
    }

    /**
     * @param generatorBuilderPath with the generator builder path
     * @return a temporary output directory for the generation
     */
    public static String generateTemporaryOutputDirectory(final String generatorBuilderPath) {
        boolean existFolder = true;
        String fullPathDirectory = generatorBuilderPath + File.separator + ConstantsAnt.BASE_GEN_FOLDERS
                + ConstantsAnt.TEMP_DIRECTORY_PREFIX;

        while (existFolder) {
            existFolder = FilesUtility.existDirectory(fullPathDirectory + TEMP_FILE_SUFFIX.incrementAndGet());
        }

        return ConstantsAnt.TEMP_DIRECTORY_PREFIX + TEMP_FILE_SUFFIX.get();
    }

    /**
     * Read the file content
     * @param filePath with the file path
     * @return the file content as byte array
     * @throws APIRestGeneratorException with an occurred exception
     */
    public static byte[] readFileContent(final String filePath) throws APIRestGeneratorException {
        Path path = null;

        if (filePath.toLowerCase().startsWith(ConstantsInput.SO_PATH_STRING_PREFIX)) {
            path = Paths.get(URI.create(filePath));
        } else {
            path = Paths.get(filePath, new String[0]);
        }

        byte[] fileContent = null;

        if (Files.exists(path, new LinkOption[0])) {
            try {
                fileContent = FileUtils.readFileToByteArray(path.toFile());
            } catch (IOException ioException) {
                final String errorString = "IOException when reading the file '" + filePath + "': " + ioException;

                Utilities.LOGGER.error(errorString, ioException);
                throw new APIRestGeneratorException(errorString, ioException);
            }
        }

        return fileContent;
    }
}