java/W11/strategy/StrategyFactory.java

package com.example.datacollect.strategy;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.List;

public class StrategyFactory {
    private static final Logger logger = LoggerFactory.getLogger(StrategyFactory.class);
    private final List<CrawlStrategy> strategies = new ArrayList<>();

    public StrategyFactory() {
        strategies.add(new HnuNewsStrategy());
        strategies.add(new BlogStrategy());
        strategies.add(new NewsStrategy());
        logger.info("StrategyFactory initialized with {} strategies", strategies.size());
    }

    public CrawlStrategy getStrategy(String url) {
        for (CrawlStrategy s : strategies) {
            if (s.supports(url)) {
                logger.debug("Found strategy for URL: {} -> {}", url, s.getClass().getSimpleName());
                return s;
            }
        }
        logger.warn("No strategy found for URL: {}", url);
        return null;
    }

    public void register(CrawlStrategy strategy) {
        strategies.add(strategy);
        logger.info("Registered new strategy: {}", strategy.getClass().getSimpleName());
    }
}