Java String Split splitInitialItems(final String text)

Description

Split initial value text into items.

License

Open Source License

Parameter

Parameter	Description
text	Text to parse, may be <code>null</code> or empty

Exception

Parameter	Description
Exception	on error

Return

Items from text, null if nothing provided

Declaration

public static List<String> splitInitialItems(final String text) throws Exception 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2016 Oak Ridge National Laboratory.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 ******************************************************************************/

import java.util.ArrayList;

import java.util.List;

public class Main {
    /** Split initial value text into items.
     */*from w w  w . j  a va2  s . c  o  m*/
     *  <p>Items are separated by comma.
     *  Items are trimmed of surrounding whitespace.
     *
     *  <p>Spaces and commata inside quotes are retained.
     *  Quotes inside quotes need to be escaped.
     *
     *  @param text Text to parse, may be <code>null</code> or empty
     *  @return Items from text, <code>null</code> if nothing provided
     *  @throws Exception on error
     */
    public static List<String> splitInitialItems(final String text) throws Exception {
        if (text == null || text.isEmpty())
            return null;

        final List<String> items = new ArrayList<>();

        int pos = 0;
        while (pos < text.length()) {
            final char c = text.charAt(pos);
            // Skip space
            if (c == ' ' || c == '\t')
                ++pos;

            // Handle quoted string
            else if (c == '"') { // Locate closing, non-escaped quote
                int end = text.indexOf('"', pos + 1);
                while (end > pos && text.charAt(end - 1) == '\\')
                    end = text.indexOf('"', end + 1);
                if (end < 0)
                    throw new Exception("Missing closing quote");
                items.add(text.substring(pos, end + 1));
                pos = end + 1;
                // Advance to comma at end of string
                while (pos < text.length() && text.charAt(pos) != ',')
                    ++pos;
                ++pos;
            }

            // Handle unquoted item
            else { // Locate comma
                int end = pos + 1;
                while (end < text.length() && text.charAt(end) != ',')
                    ++end;
                items.add(text.substring(pos, end).trim());
                pos = end + 1;
            }
        }

        return items;
    }
}

Related

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2. splitHelperName(String name)
3. splitHistory(String history)
4. splitHTMLTags(final String string)
5. splitIdKeyConfig(String config)
6. splitInput(String cliInput)
7. splitIntArray(final String iInput)
8. splitIntegerFromString(String str)
9. splitIntegerPerDigit(int i)