java/project/src/main/java/com/ski/crawler/util/CliArgs.java

package com.ski.crawler.util;

import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

public class CliArgs {
    public static Map<String, String> parseOptions(String[] args, int startIndex) {
        Map<String, String> out = new HashMap<>();
        if (args == null) {
            return out;
        }
        for (int i = startIndex; i < args.length; i++) {
            String a = args[i];
            if (a == null) {
                continue;
            }
            String t = a.trim();
            if (!t.startsWith("--")) {
                continue;
            }
            String body = t.substring(2);
            String key;
            String value;
            int eq = body.indexOf('=');
            if (eq >= 0) {
                key = body.substring(0, eq).trim().toLowerCase(Locale.ROOT);
                value = body.substring(eq + 1).trim();
            } else {
                key = body.trim().toLowerCase(Locale.ROOT);
                if (i + 1 < args.length && args[i + 1] != null && !args[i + 1].trim().startsWith("--")) {
                    value = args[++i].trim();
                } else {
                    value = "true";
                }
            }
            if (!key.isEmpty()) {
                out.put(key, value);
            }
        }
        return out;
    }

    public static int parseInt(String v, int def) {
        try {
            if (v == null || v.trim().isEmpty()) {
                return def;
            }
            return Integer.parseInt(v.trim());
        } catch (Exception e) {
            return def;
        }
    }

    public static Integer parseNullableInt(String v) {
        try {
            if (v == null || v.trim().isEmpty()) {
                return null;
            }
            return Integer.parseInt(v.trim());
        } catch (Exception e) {
            return null;
        }
    }

    public static boolean parseBoolean(String v) {
        if (v == null) {
            return false;
        }
        String t = v.trim().toLowerCase(Locale.ROOT);
        return t.equals("true") || t.equals("1") || t.equals("yes") || t.equals("y") || t.equals("on");
    }
}