io.cloudslang.content.rft.utils.StringUtils Maven / Gradle / Ivy

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/*
 * (c) Copyright 2021 Micro Focus
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Apache License v2.0 which accompany this distribution.
 *
 * The Apache License is available 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 io.cloudslang.content.rft.utils;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.nio.file.Path;
import java.nio.file.Paths;

/**
 * @author ioanvranauhp
 *         Date: 10/29/14
 * @author octavian-h
 */
public class StringUtils {

    public static final String DEFAULT_DELIMITER = ",";
    public static final String DIGITS_REGEX = "((\\d)|,)*";
    public static final String EMPTY_STRING = "";
    public static final String DEFAULT_NEWLINE = "\\n";

    public static boolean toBoolean(String value, boolean defaultValue) {
        if (value == null || value.length() == 0) {
            return defaultValue;
        }

        return Boolean.valueOf(value);
    }

    public static int toInt(String value, int defaultValue) {
        if (value == null || value.length() == 0) {
            return defaultValue;
        }

        return Integer.valueOf(value);
    }

    public static String toNotEmptyString(String value, String defaultValue) {
        if (value == null || value.length() == 0) {
            return defaultValue;
        }

        return value;
    }

    public static String toNewline(String value) {
        value = toNotEmptyString(value, DEFAULT_NEWLINE);
        char[] chars;
        if (!value.matches(DIGITS_REGEX)) {
            String[] split = value.split("\\\\");
            chars = new char[split.length - 1];
            for (int count = 0; count < split.length; count++)
                if (split[count].equalsIgnoreCase("n"))
                    chars[count - 1] = '\n';
                else if (split[count].equalsIgnoreCase("r"))
                    chars[count - 1] = '\r';
                else if (split[count].length() != 0) {
                    throw new RuntimeException("Unable to parse sequence of newline characters. Please specify this input as a comma delimited list of base-10 ASCII character codes.");
                }
        } else {
            String[] split = value.split(DEFAULT_DELIMITER);
            chars = new char[split.length];
            for (int count = 0; count < split.length; count++)
                chars[count] = (char) Integer.parseInt(split[count]);
        }
        return new String(chars);
    }

    public static Path toPath(String value, Path defaultValue) {
        if (value == null || value.length() == 0) {
            return defaultValue;
        }

        return Paths.get(value);
    }

    public static String getStackTraceAsString(Throwable t) {
        if (t != null) {
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw);
            t.printStackTrace(pw);
            final String stackTraceAsString = sw.toString();
            try {
                sw.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            pw.close();
            return stackTraceAsString;
        } else {
            return EMPTY_STRING;
        }
    }

    public static boolean isEmpty(String value) {
        return value == null || value.length() == 0;
    }
}