org.structr.common.CaseHelper.java Source code

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Here is the source code for org.structr.common.CaseHelper.java

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/**
 * Copyright (C) 2010-2016 Structr GmbH
 *
 * This file is part of Structr <http://structr.org>.
 *
 * Structr is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * Structr is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Structr.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.structr.common;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.text.WordUtils;

//~--- classes ----------------------------------------------------------------

/**
 * A helper class that contains methods to convert strings to and from
 * different cases and styles, i.e. camelCase to underscore_style etc.
 *
 *
 */
public class CaseHelper {

    public static String toUpperCamelCase(final String input) {
        return WordUtils.capitalize(input, new char[] { '_' }).replaceAll("_", "");
    }

    public static String toLowerCamelCase(final String input) {
        return input.substring(0, 1).toLowerCase()
                .concat(WordUtils.capitalize(input, new char[] { '_' }).replaceAll("_", "").substring(1));
    }

    public static String toUnderscore(final String input, final boolean plural) {

        if (input.toUpperCase().equals(input)) {

            return input;

        }

        StringBuilder out = new StringBuilder();

        for (int i = 0; i < input.length(); i++) {

            char c = input.charAt(i);

            if (Character.isUpperCase(c)) {

                if (i > 0) {

                    out.append("_");

                }

                out.append(Character.toLowerCase(c));

            } else {

                out.append(c);

            }

        }

        String output = out.toString();

        return plural ? plural(output) : output;
    }

    /**
     * Test method.
     */
    public static void main(String[] args) {

        String[] input = { "check_ins", "CheckIns", "blog_entry", "BlogEntry", "blog_entries", "BlogEntries",
                "blogentry", "blogentries" };

        for (int i = 0; i < input.length; i++) {

            System.out.println(
                    StringUtils.rightPad(input[i], 20) + StringUtils.leftPad(toUpperCamelCase(input[i]), 20)
                            + StringUtils.leftPad(toUnderscore(input[i], true), 20)
                            + StringUtils.leftPad(toUnderscore(input[i], false), 20));

        }
    }

    public static String plural(String type) {

        int len = type.length();

        if (type.substring(len - 1, len).equals("y")) {

            return type.substring(0, len - 1) + "ies";

        } else if (!(type.substring(len - 1, len).equals("s"))) {

            return type.concat("s");

        } else {
            return type;
        }
    }
}