NumberParser.java

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/*
 * This file is part of JXClient, the Fullscreen Java Crossfire Client.
 *
 * JXClient is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * JXClient 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with JXClient; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Copyright (C) 2005-2008 Yann Chachkoff.
 * Copyright (C) 2006-2011 Andreas Kirschbaum.
 */

package com.realtime.crossfire.jxclient.util;

import java.io.IOException;
import org.jetbrains.annotations.NotNull;

public class NumberParser {

    private NumberParser() {
    }

    public static int parseInt(@NotNull final String string, final int defaultValue) {
        try {
            return Integer.parseInt(string);
        } catch (final NumberFormatException ignored) {
            System.err.println("Warning: invalid value "+string+", using "+defaultValue+" instead.");
            return defaultValue;
        }
    }

    public static int parseInt(@NotNull final String string, final int defaultValue, final int minValue, final int maxValue) {
        final int value = parseInt(string, defaultValue);
        if (value < minValue || value > maxValue) {
            System.err.println("Warning: invalid value "+string+", using "+defaultValue+" instead.");
            return defaultValue;
        }

        return value;
    }

    public static long parseLong(@NotNull final String string, final long defaultValue) {
        try {
            return Long.parseLong(string);
        } catch (final NumberFormatException ignored) {
            System.err.println("Warning: invalid value "+string+", using "+defaultValue+" instead.");
            return defaultValue;
        }
    }

    public static float parseFloat(@NotNull final String str) throws IOException {
        try {
            return Float.parseFloat(str);
        } catch (final NumberFormatException ex) {
            throw new IOException("invalid number: "+str, ex);
        }
    }

    public static boolean parseBoolean(@NotNull final String str) throws IOException {
        try {
            return Boolean.parseBoolean(str);
        } catch (final NumberFormatException ex) {
            throw new IOException("invalid boolean: "+str, ex);
        }
    }

    @NotNull
    public static <T extends Enum<T>> T parseEnum(@NotNull final Class<T> class_, @NotNull final String name, @NotNull final String ident) throws IOException {
        try {
            return Enum.valueOf(class_, name);
        } catch (final IllegalArgumentException ex) {
            throw new IOException("no such "+ident+" type: "+name, ex);
        }
    }

}