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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.jersey.internal.util;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.regex.Pattern;
/**
* A utility class providing methods capable of splitting String entries
* into an array of tokens based on either default or custom token delimiters.
*
* @author Marek Potociar (marek.potociar at oracle.com)
*/
public final class Tokenizer {
private Tokenizer() {
// prevents instantiation.
}
/**
* Common Jersey delimiters used by various properties.
*/
public static final String COMMON_DELIMITERS = " ,;\n";
/**
* Get a canonical array of tokens from an array of String entries
* where each entry may contain zero or more tokens separated by
* common delimiters {@code " ,;\n"}.
*
* @param entries an array where each String entry may contain zero or more
* {@link #COMMON_DELIMITERS common delimiters} separated tokens.
* @return the array of tokens, each token is trimmed, the array will
* not contain any empty or {@code null} entries.
*/
public static String[] tokenize(String[] entries) {
return tokenize(entries, COMMON_DELIMITERS);
}
/**
* Get a canonical array of tokens from an array of String entries
* where each entry may contain zero or more tokens separated by characters
* in delimiters string.
*
* @param entries an array where each String entry may contain zero or more
* delimiters separated tokens.
* @param delimiters string with delimiters, every character represents one
* delimiter.
* @return the array of tokens, each token is trimmed, the array will
* not contain any empty or {@code null} entries.
*/
public static String[] tokenize(String[] entries, String delimiters) {
final List tokens = new LinkedList();
for (String entry : entries) {
if (entry == null || entry.isEmpty()) {
continue;
}
entry = entry.trim();
if (entry.isEmpty()) {
continue;
}
tokenize(entry, delimiters, tokens);
}
return tokens.toArray(new String[tokens.size()]);
}
/**
* Get a canonical array of tokens from a String entry that may contain
* zero or more tokens separated by common delimiters {@code " ,;\n"}.
*
* @param entry a String that may contain zero or more
* {@link #COMMON_DELIMITERS common delimiters} separated tokens.
* @return the array of tokens, each tokens is trimmed, the array will
* not contain any empty or {@code null} entries.
*/
public static String[] tokenize(String entry) {
return tokenize(entry, COMMON_DELIMITERS);
}
/**
* Get a canonical array of tokens from a String entry
* that may contain zero or more tokens separated by characters in
* delimiters string.
*
* @param entry a String that may contain zero or more
* delimiters separated tokens.
* @param delimiters string with delimiters, every character represents one
* delimiter.
* @return the array of tokens, each tokens is trimmed, the array will
* not contain any empty or {@code null} entries.
*/
public static String[] tokenize(String entry, String delimiters) {
final Collection tokens = tokenize(entry, delimiters, new LinkedList());
return tokens.toArray(new String[tokens.size()]);
}
private static Collection tokenize(String entry, String delimiters, Collection tokens) {
final StringBuilder regexpBuilder = new StringBuilder(delimiters.length() * 3);
regexpBuilder.append('[');
for (char c : delimiters.toCharArray()) {
regexpBuilder.append(Pattern.quote(String.valueOf(c)));
}
regexpBuilder.append(']');
String[] tokenArray = entry.split(regexpBuilder.toString());
for (String token : tokenArray) {
if (token == null || token.isEmpty()) {
continue;
}
token = token.trim();
if (token.isEmpty()) {
continue;
}
tokens.add(token);
}
return tokens;
}
/**
* Remove any beginning or trailing quotes from a trimmed entry and return the
* updated entry.
*
* @param entry a potentially quoted string entry.
* @return a trimmed, unquoted string entry.
*/
public static String unqote(String entry) {
if (entry == null || entry.isEmpty()) {
return entry;
}
entry = entry.trim();
if (entry.isEmpty()) {
return entry;
}
entry = (entry.startsWith("\"")) ? entry.substring(1) : entry;
return (entry.endsWith("\"")) ? entry.substring(0, entry.length() - 1) : entry;
}
}
