Utils.java Source code

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Here is the source code for Utils.java

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/*
 * JBoss DNA (http://www.jboss.org/dna)
 * See the COPYRIGHT.txt file distributed with this work for information
 * regarding copyright ownership.  Some portions may be licensed
 * to Red Hat, Inc. under one or more contributor license agreements.
 * See the AUTHORS.txt file in the distribution for a full listing of 
 * individual contributors. 
 *
 * JBoss DNA is free software. Unless otherwise indicated, all code in JBoss DNA
 * is licensed to you under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * JBoss DNA is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

import java.text.CharacterIterator;
import java.text.StringCharacterIterator;

public class Utils {

    /**
     * Determine whether the supplied string represents a well-formed fully-qualified Java classname. This utility method enforces
     * no conventions (e.g., packages are all lowercase) nor checks whether the class is available on the classpath.
     * 
     * @param classname
     * @return true if the string is a fully-qualified class name
     */
    public static boolean isFullyQualifiedClassname(String classname) {
        if (classname == null)
            return false;
        String[] parts = classname.split("[\\.]");
        if (parts.length == 0)
            return false;
        for (String part : parts) {
            CharacterIterator iter = new StringCharacterIterator(part);
            // Check first character (there should at least be one character for each part) ...
            char c = iter.first();
            if (c == CharacterIterator.DONE)
                return false;
            if (!Character.isJavaIdentifierStart(c) && !Character.isIdentifierIgnorable(c))
                return false;
            c = iter.next();
            // Check the remaining characters, if there are any ...
            while (c != CharacterIterator.DONE) {
                if (!Character.isJavaIdentifierPart(c) && !Character.isIdentifierIgnorable(c))
                    return false;
                c = iter.next();
            }
        }
        return true;
    }

}