/*

 * Copyright (c) 2016, 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

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 */

package javax.xml.catalog;

import java.net.URL;

/**

 * Represents a rewriteURI entry.

 *

 * @since 9

 */

final class RewriteUri extends BaseEntry {

    String uriStartString;

    URL rewritePrefix;

    /**

     * Construct a rewriteURI entry.

     * @param uriStartString The uriStartString attribute.

     * @param rewritePrefix The rewritePrefix attribute.

     */

    public RewriteUri(String base, String uriStartString, String rewritePrefix) {

        super(CatalogEntryType.REWRITEURI, base);

        setURIStartString (uriStartString);

        setRewritePrefix(rewritePrefix);

    }

    /**

     * Set the uriStartString attribute.

     * @param uriStartString The uriStartString attribute value.

     */

    public void setURIStartString (String uriStartString) {

        CatalogMessages.reportNPEOnNull("uriStartString", uriStartString);

        this.uriStartString = Normalizer.normalizeURI(uriStartString);

    }

    /**

     * Set the rewritePrefix attribute. If the value of the rewritePrefix attribute

     * is relative, it must be made absolute with respect to the base URI currently in effect.

     *

     * @param rewritePrefix The rewritePrefix attribute value.

     */

    public void setRewritePrefix(String rewritePrefix) {

        this.rewritePrefix = verifyURI("setRewritePrefix", baseURI, rewritePrefix);

    }

    /**

     * Get the uriStartString attribute.

     * @return The uriStartString

     */

    public String getURIStartString () {

        return uriStartString;

    }

    /**

     * Get the rewritePrefix attribute.

     * @return The rewritePrefix attribute value.

     */

    public URL getRewritePrefix() {

        return rewritePrefix;

    }

    /**

     * Try to match the specified systemId with the entry. Return the match if it

     * is successful and the length of the systemIdStartString is longer than the

     * longest of any previous match.

     *

     * @param systemId The systemId to be matched.

     * @param currentMatch The length of uriStartString of previous match if any.

     * @return The replacement URI if the match is successful, null if not.

     */

    @Override

    public String match(String systemId, int currentMatch) {

        if (uriStartString.length() < systemId.length() &&

                uriStartString.equals(systemId.substring(0, uriStartString.length()))) {

            if (currentMatch < uriStartString.length()) {

                String prefix = rewritePrefix.toExternalForm();

                String sysId;

                if (uriStartString.endsWith(SLASH)) {

                    sysId = systemId.substring(uriStartString.length());

                } else {

                    sysId = systemId.substring(uriStartString.length() + 1);

                }

                if (prefix.endsWith(SLASH)) {

                    return prefix + sysId;

                } else {

                    return prefix + SLASH + sysId;

                }

            }

        }

        return null;

    }

    @Override

    public String match(String systemId) {

        return match(systemId, 0);

    }

}