/*

 * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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 General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

package com.sun.tools.javac.util;

import java.util.regex.Pattern;

import javax.lang.model.SourceVersion;

/**Utilities to convert an import-like string to a regexp.

 *

 *  <p><b>This is NOT part of any supported API.

 *  If you write code that depends on this, you do so at your own risk.

 *  This code and its internal interfaces are subject to change or

 *  deletion without notice.</b>

 */

public class MatchingUtils {

    /**

     * Return true if the argument string is a valid import-style

     * string specifying claimed annotations; return false otherwise.

     */

    public static boolean isValidImportString(String s) {

        if (s.equals("*"))

            return true;

        boolean valid = true;

        String t = s;

        int index = t.indexOf('*');

        if (index != -1) {

            // '*' must be last character...

            if (index == t.length() -1) {

                // ... any and preceding character must be '.'

                if ( index-1 >= 0 ) {

                    valid = t.charAt(index-1) == '.';

                    // Strip off ".*$" for identifier checks

                    t = t.substring(0, t.length()-2);

                }

            } else

                return false;

        }

        // Verify string is off the form (javaId \.)+ or javaId

        if (valid) {

            String[] javaIds = t.split("\\.", t.length()+2);

            for(String javaId: javaIds)

                valid &= SourceVersion.isIdentifier(javaId);

        }

        return valid;

    }

        if (s.equals("*")) {

        } else {

            String s_prime = s.replace(".", "\\.");

            if (s_prime.endsWith("*")) {

                s_prime =  s_prime.substring(0, s_prime.length() - 1) + ".+";

            }

        }

    }

}