/*

 * 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.xml.internal.bind.v2.schemagen;

/**

 * TODO: JAX-WS dependes on this class - consider moving it somewhere more stable, Notify JAX-WS before modifying anything...

 *

 * Other miscellaneous utility methods.

 *

 * @author

 *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)

 */

public final class Util {

    private Util() {}   // no instanciation please

    /**

     * Escape any characters that would cause the single arg constructor

     * of java.net.URI to complain about illegal chars.

     *

     * @param s source string to be escaped

     */

    public static String escapeURI(String s) {

        StringBuilder sb = new StringBuilder();

        for( int i = 0; i < s.length(); i++ ) {

            char c = s.charAt(i);

            if(Character.isSpaceChar(c)) {

                sb.append("%20");

            } else {

                sb.append(c);

            }

        }

        return sb.toString();

    }

    /**

     * Calculate the parent URI path of the given URI path.

     *

     * @param uriPath the uriPath (as returned by java.net.URI#getPath()

     * @return the parent URI path of the given URI path

     */

    public static String getParentUriPath(String uriPath) {

        int idx = uriPath.lastIndexOf('/');

        if (uriPath.endsWith("/")) {

            uriPath = uriPath.substring(0,idx); // trim trailing slash

            idx = uriPath.lastIndexOf('/'); // move idx to parent context

        }

        return uriPath.substring(0, idx)+"/";

    }

    /**

     * Calculate the normalized form of the given uriPath.

     *

     * For example:

     *    /a/b/c/ -> /a/b/c/

     *    /a/b/c  -> /a/b/

     *    /a/     -> /a/

     *    /a      -> /

     *

     * @param uriPath path of a URI (as returned by java.net.URI#getPath()

     * @return the normalized uri path

     */

    public static String normalizeUriPath(String uriPath) {

        if (uriPath.endsWith("/"))

            return uriPath;

        // the uri path should always have at least a leading slash,

        // so no need to make sure that ( idx == -1 )

        int idx = uriPath.lastIndexOf('/');

        return uriPath.substring(0, idx+1);

    }

    /**

     * determine if two Strings are equal ignoring case allowing null values

     *

     * @param s string 1

     * @param t string 2

     * @return true iff the given strings are equal ignoring case, false if they aren't

     * equal or either of them are null.

     */

    public static boolean equalsIgnoreCase(String s, String t) {

        if (s == t) return true;

        if ((s != null) && (t != null)) {

            return s.equalsIgnoreCase(t);

        }

        return false;

    }

    /**

     * determine if two Strings are iqual allowing null values

     *

     * @param s string 1

     * @param t string 2

     * @return true iff the strings are equal, false if they aren't equal or either of

     * them are null.

     */

    public static boolean equal(String s, String t) {

        if (s == t) return true;

        if ((s != null) && (t != null)) {

            return s.equals(t);

        }

        return false;

    }

}