/*

 * 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

 * questions.

 */

package build.tools.dtdbuilder;

import javax.swing.text.html.parser.*;

import java.io.File;

import java.io.IOException;

import java.io.FileInputStream;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.BufferedReader;

import java.util.Hashtable;

/**

 * A class for mapping public identifiers to locations.

 * Note: I'm not sure if there is a more natural mapping

 * then this. Maybe we should use properties instead?

 *

 * @author      Arthur van Hoff

 */

final class PublicMapping {

    String baseStr;

    Hashtable<String, String> tab = new Hashtable<>();

    /**

     * Create a mapping.

     */

    public PublicMapping (String baseStr, String mapFile) throws IOException {

        // System.err.println("start loading " + baseStr);

        this.baseStr = baseStr;

        load(new FileInputStream(baseStr+mapFile));

        // System.err.println("stop loading");

    }

    /**

     * Load a set of mappings from a stream.

     */

    public void load(InputStream in) throws IOException {

        InputStreamReader reader = new InputStreamReader(in);

        BufferedReader data = new BufferedReader(reader);

        for (String ln = data.readLine() ; ln != null ; ln = data.readLine()) {

            if (ln.startsWith("PUBLIC")) {

                int len = ln.length();

                int i = 6;

                while ((i < len) && (ln.charAt(i) != '"')) i++;

                int j = ++i;

                while ((j < len) && (ln.charAt(j) != '"')) j++;

                String id = ln.substring(i, j);

                i = ++j;

                while ((i < len) && ((ln.charAt(i) == ' ') || (ln.charAt(i) == '\t'))) i++;

                j = i + 1;

                while ((j < len) && (ln.charAt(j) != ' ') && (ln.charAt(j) != '\t')) j++;

                String where = ln.substring(i, j);

                put(id, baseStr + where);

            }

        }

        data.close();

    }

    /**

     * Add a mapping from a public identifier to a path.

     */

    public void put(String id, String str) {

        // System.err.println("ADD = '" + id + "' = " + str);

        tab.put(id, str);

        if (str.endsWith(".dtd")) {

            int i = str.lastIndexOf(File.separator);

            if (i >= 0) {

                tab.put(str.substring(i + 1, str.length() - 4), str);

            }

        }

    }

    /**

     * Map a public identifier to a path.. You can also map

     * a DTD file name (without the .dtd) to its path.

     */

    public String get(String id) {

        // System.err.println(" id = "+id);

        return tab.get(id);

    }

}