com.liferay.portal.kernel.util.CamelCaseUtil.java Source code

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Here is the source code for com.liferay.portal.kernel.util.CamelCaseUtil.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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 Lesser General Public License for more
 * details.
 */

package com.liferay.portal.kernel.util;

import com.liferay.petra.string.CharPool;

/**
 * @author Igor Spasic
 * @author Eduardo Lundgren
 */
public class CamelCaseUtil {

    public static String fromCamelCase(String s) {
        return fromCamelCase(s, CharPool.DASH);
    }

    public static String fromCamelCase(String s, char delimiter) {
        StringBuilder sb = new StringBuilder();

        boolean upperCase = false;

        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);

            if ((i > 0) && Character.isUpperCase(c)) {
                if (!upperCase || ((i < (s.length() - 1)) && !Character.isUpperCase(s.charAt(i + 1)))) {

                    sb.append(delimiter);
                }

                c = Character.toLowerCase(c);

                upperCase = true;
            } else {
                upperCase = false;
            }

            sb.append(c);
        }

        return sb.toString();
    }

    public static String normalizeCamelCase(String s) {
        return normalizeCamelCase(s, false);
    }

    public static String normalizeCamelCase(String s, boolean normalizeInnerTerms) {

        StringBuilder sb = new StringBuilder(s);

        boolean upperCase = false;

        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);

            if (!normalizeInnerTerms && (c == CharPool.PERIOD)) {
                return sb.toString();
            }

            if ((i > 0) && Character.isUpperCase(c)) {
                boolean nextUpperCase = true;

                if (i < (s.length() - 1)) {
                    char nextChar = s.charAt(i + 1);

                    if ((nextChar != CharPool.PERIOD) && !Character.isUpperCase(nextChar)) {

                        nextUpperCase = false;
                    }
                }

                if (upperCase && nextUpperCase) {
                    sb.setCharAt(i, Character.toLowerCase(c));
                }

                upperCase = true;
            } else {
                upperCase = false;
            }
        }

        return sb.toString();
    }

    public static String toCamelCase(String s) {
        return toCamelCase(s, CharPool.DASH);
    }

    public static String toCamelCase(String s, char delimiter) {
        StringBuilder sb = new StringBuilder(s.length());

        boolean upperCase = false;

        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);

            if (c == delimiter) {
                upperCase = true;
            } else if (upperCase) {
                sb.append(Character.toUpperCase(c));

                upperCase = false;
            } else {
                sb.append(c);
            }
        }

        return sb.toString();
    }

}