Java example source code file (PropList.java)

This example Java source code file (PropList.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arraylist, bufferedreader, file, filereader, ioexception, linkedhashmap, matcher, proplist, regex, set, string, unrecognized, util, warning, xdigit

The PropList.java Java example source code

/*
 * Copyright (c) 2011, 2013, 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
 * questions.
 */

package build.tools.generatecharacter;

import java.util.regex.*;
import java.util.*;
import java.io.*;

/**
 * A PropList object contains the lists of code points that have
 * the same Unicode property defined in PropList.txt
 *
 * @author Xueming Shen
 */
public class PropList {

    public static PropList readSpecFile(File file, int plane)
        throws IOException
    {
        return new PropList(file, plane);
    }

    public List<Integer> codepoints(String name) {
        return propMap.get(name);
    }

    public Set<String> names() {
        return propMap.keySet();
    }

    private Map<String, ArrayList propMap =
        new LinkedHashMap<String, ArrayList();

    private PropList(File file, int plane) throws IOException {

        int i, j;
        BufferedReader sbfr = new BufferedReader(new FileReader(file));
        Matcher m = Pattern.compile("(\\p{XDigit}+)(?:\\.{2}(\\p{XDigit}+))?\\s*;\\s+(\\w+)\\s+#.*").matcher("");
        String line = null;
        int lineNo = 0;
        while ((line = sbfr.readLine()) != null) {
            lineNo++;
            if (line.length() <= 1 || line.charAt(0) == '#') {
                continue;
            }
            m.reset(line);
            if (m.matches()) {
                int start = Integer.parseInt(m.group(1), 16);
                if ((start >> 16) != plane)
                    continue;
                int end = (m.group(2)==null)?start
                          :Integer.parseInt(m.group(2), 16);
                String name = m.group(3);

                start &= 0xffff;
                end &= 0xffff;

                ArrayList<Integer> list = propMap.get(name);
                if (list == null) {
                    list = new ArrayList<Integer>();
                    propMap.put(name, list);
                }
                while (start <= end)
                    list.add(start++);
            } else {
                System.out.printf("Warning: Unrecognized line %d <%s>%n", lineNo, line);
            }
        }
        sbfr.close();

        //for (String name: propMap.keySet()) {
        //    System.out.printf("%s    %d%n", name, propMap.get(name).size());
        //}
    }

    public static void main(String[] args) throws IOException {
        readSpecFile(new File(args[0]), Integer.decode(args[1]));
    }
}