Java String Split splitName(String name)

Description

split Name

License

Apache License

Parameter

Parameter	Description
name	A class name or non-empty package name.

Exception

Parameter	Description
IllegalArgumentException	if name has dots in wrong places(corresponding to empty name parts) or is empty.
NullPointerException	if the specified name is null.

Return

New array of dot-separated (and non-empty) names.

Declaration

public static String[] splitName(String name) 

Method Source Code

//package com.java2s;
/*//from   w  w  w .ja v a2 s  .c  o m
 * Copyright 2015-2016 Jeff Hain
 *
 * Licensed 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;

public class Main {
    private static final char CHAR_DOT = '.';
    private static final String STRING_DOT = ".";
    private static final String REGEX_DOT = "\\.";

    /**
     * @param name A class name or non-empty package name.
     * @return New array of dot-separated (and non-empty) names.
     * @throws IllegalArgumentException if name has dots in wrong places
     *         (corresponding to empty name parts) or is empty.
     * @throws NullPointerException if the specified name is null.
     */
    public static String[] splitName(String name) {
        if (false) {
            /*
             * Also works, but a bit slower, and less elegant.
             */
            if (name.startsWith(STRING_DOT) || name.endsWith(STRING_DOT)) {
                throwIAEEmptyNameIn(name);
            }
            // If name is empty, parts will contain a single empty string,
            // so we will throw in the for loop.
            final String[] parts = name.split(REGEX_DOT);
            for (String part : parts) {
                if (part.length() == 0) {
                    throwIAEEmptyNameIn(name);
                }
            }
            return parts;
        }

        final ArrayList<String> list = new ArrayList<String>();

        int i = 0;
        while (true) {
            // Implicit null check.
            final int j = name.indexOf(CHAR_DOT, i);
            if (j < 0) {
                if (i == name.length()) {
                    throwIAEEmptyNameIn(name);
                }
                list.add(name.substring(i));
                break;
            }

            if (j == i) {
                throwIAEEmptyNameIn(name);
            }

            list.add(name.substring(i, j));

            i = j + 1;
        }

        return list.toArray(new String[list.size()]);
    }

    private static void throwIAEEmptyNameIn(String name) {
        throw new IllegalArgumentException("empty name in " + name);
    }
}

Related

1. splitListToParts(final List list, final int times)
2. splitLongUnicodeString(String message, List result)
3. splitMacros(String s)
4. splitManagedBean(String el)
5. splitMultiMessageString( String multiMessageString, String messageSplitter)
6. splitNames(final String string)
7. splitObjectString(String str)
8. splitOgnl(String ognl)
9. splitOn(String toSplit, String splitter)