Main.java Source code

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Here is the source code for Main.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.
 */
import java.util.ArrayList;
import java.util.List;

public class Main {
    /**
     * <p>Splits a String by Character type as returned by
     * <code>java.lang.Character.getType(char)</code>. Groups of contiguous
     * characters of the same type are returned as complete tokens. 
     * <pre>
     * StringUtils.splitByCharacterType(null)         = null
     * StringUtils.splitByCharacterType("")           = []
     * StringUtils.splitByCharacterType("ab de fg")   = ["ab", " ", "de", " ", "fg"]
     * StringUtils.splitByCharacterType("ab   de fg") = ["ab", "   ", "de", " ", "fg"]
     * StringUtils.splitByCharacterType("ab:cd:ef")   = ["ab", ":", "cd", ":", "ef"]
     * StringUtils.splitByCharacterType("number5")    = ["number", "5"]
     * StringUtils.splitByCharacterType("fooBar")     = ["foo", "B", "ar"]
     * StringUtils.splitByCharacterType("foo200Bar")  = ["foo", "200", "B", "ar"]
     * StringUtils.splitByCharacterType("ASFRules")   = ["ASFR", "ules"]
     * </pre>
     * @param str the String to split, may be <code>null</code>
     * @return an array of parsed Strings, <code>null</code> if null String input
     * @since 2.4
     */
    public static String[] splitByCharacterType(String str) {
        return splitByCharacterType(str, false);
    }

    /**
     * <p>
     * Splits a String by Character type as returned by
     * <code>java.lang.Character.getType(char)</code>. Groups of contiguous
     * characters of the same type are returned as complete tokens, with the
     * following exception: if <code>camelCase</code> is <code>true</code>,
     * the character of type <code>Character.UPPERCASE_LETTER</code>, if any,
     * immediately preceding a token of type
     * <code>Character.LOWERCASE_LETTER</code> will belong to the following
     * token rather than to the preceding, if any,
     * <code>Character.UPPERCASE_LETTER</code> token.
     * 
     * @param str
     *          the String to split, may be <code>null</code>
     * @param camelCase
     *          whether to use so-called "camel-case" for letter types
     * @return an array of parsed Strings, <code>null</code> if null String
     *         input
     * @since 2.4
     */
    private static String[] splitByCharacterType(String str, boolean camelCase) {
        if (str == null) {
            return null;
        }
        if (str.length() == 0) {
            return new String[0];
        }
        char[] c = str.toCharArray();
        List list = new ArrayList();
        int tokenStart = 0;
        int currentType = Character.getType(c[tokenStart]);
        for (int pos = tokenStart + 1; pos < c.length; pos++) {
            int type = Character.getType(c[pos]);
            if (type == currentType) {
                continue;
            }
            if (camelCase && type == Character.LOWERCASE_LETTER && currentType == Character.UPPERCASE_LETTER) {
                int newTokenStart = pos - 1;
                if (newTokenStart != tokenStart) {
                    list.add(new String(c, tokenStart, newTokenStart - tokenStart));
                    tokenStart = newTokenStart;
                }
            } else {
                list.add(new String(c, tokenStart, pos - tokenStart));
                tokenStart = pos;
            }
            currentType = type;
        }
        list.add(new String(c, tokenStart, c.length - tokenStart));
        return (String[]) list.toArray(new String[list.size()]);
    }

}