org.apache.ivy.osgi.util.ParseUtil Maven / Gradle / Ivy
/*
* 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.
*
*/
package org.apache.ivy.osgi.util;
import java.util.ArrayList;
import java.util.List;
public class ParseUtil {
/**
* Parses delimited string and returns an array containing the tokens. This parser obeys quotes,
* so the delimiter character will be ignored if it is inside of a quote. This method assumes
* that the quote character is not included in the set of delimiter characters.
*
* @param value
* the delimited string to parse.
* @param delim
* the characters delimiting the tokens.
* @return an array of string tokens or null if there were no tokens.
*/
// method largely inspired by Apache Felix 1.0.4 ManifestParser method
public static String[] parseDelimitedString(String value, String delim) {
if (value == null) {
value = "";
}
final List list = new ArrayList();
final int CHAR = 1;
final int DELIMITER = 2;
final int STARTQUOTE = 4;
final int ENDQUOTE = 8;
final StringBuffer sb = new StringBuffer();
int expecting = (CHAR | DELIMITER | STARTQUOTE);
for (int i = 0; i < value.length(); i++) {
final char c = value.charAt(i);
final boolean isDelimiter = (delim.indexOf(c) >= 0);
final boolean isQuote = (c == '"');
if (isDelimiter && ((expecting & DELIMITER) > 0)) {
list.add(sb.toString().trim());
sb.delete(0, sb.length());
expecting = (CHAR | DELIMITER | STARTQUOTE);
} else if (isQuote && ((expecting & STARTQUOTE) > 0)) {
sb.append(c);
expecting = CHAR | ENDQUOTE;
} else if (isQuote && ((expecting & ENDQUOTE) > 0)) {
sb.append(c);
expecting = (CHAR | STARTQUOTE | DELIMITER);
} else if ((expecting & CHAR) > 0) {
sb.append(c);
} else {
throw new IllegalArgumentException("Invalid delimited string: " + value);
}
}
if (sb.length() > 0) {
list.add(sb.toString().trim());
}
return list.toArray(new String[list.size()]);
}
}