maps.OptionsHandler.java Source code

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Here is the source code for maps.OptionsHandler.java

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/*
 * Copyright 2016 Maugre Lucas
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package maps;

import java.io.*;
import org.apache.commons.cli.*;

public class OptionsHandler {
    static private Options options = new Options();

    static private int tileWidth = 16;
    static private int tileHeight = 16;
    static private File file = null;

    static int getTileWidth() {
        return tileWidth;
    }

    static int getTileHeight() {
        return tileHeight;
    }

    static File getFile() {
        return file;
    }

    static {
        options.addOption("w", "width", true, "set tile width (default: 16)");
        options.addOption("h", "height", true, "set tile height (default: 16)");
        options.addOption("f", "file", true, "select the file, will disable GUI");
        options.addOption("H", "help", false, "print this help");
    }

    static private void checkOptions(CommandLine cmd) {
        if (cmd.hasOption("w"))
            setWidthOption(cmd.getOptionValue("w"));
        if (cmd.hasOption("h"))
            setHeightOption(cmd.getOptionValue("h"));
        if (cmd.hasOption("f"))
            setFileOption(cmd.getOptionValue("f"));
        if (cmd.hasOption("H"))
            printHelpOption();
    }

    static void applyOptions(String[] args) {
        try {
            CommandLineParser parser = new DefaultParser();
            CommandLine cmd = parser.parse(options, args);
            checkOptions(cmd);
        } catch (ParseException e) {
            System.err.println("Error in options: " + e.toString());
            printHelpOption();
        }
    }

    static private void printHelpOption() {
        System.out.println("Usage:");
        for (Option o : options.getOptions())
            System.out.println(String.format("\t-%s --%s\t%s", o.getOpt(), o.getLongOpt(), o.getDescription()));
        System.exit(0);
    }

    static private void setWidthOption(String arg) {
        tileWidth = Integer.parseInt(arg);
    }

    static private void setHeightOption(String arg) {
        tileHeight = Integer.parseInt(arg);
    }

    static private void setFileOption(String arg) {
        file = new File(arg);
        if (!file.exists()) {
            System.err.println("File '" + arg + "' does not exists.");
            System.exit(1);
        }
    }
}