java/w11/strategy/StrategyFactory.java.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() {
        // 注册所有策略
        strategies.add(new BlogStrategy());
        strategies.add(new NewsStrategy());
        logger.info("StrategyFactory initialized with {} strategies", strategies.size());
    }

    public CrawlStrategy getStrategy(String url) {
        if (url == null || url.isBlank()) {
            logger.warn("Null or blank URL provided to getStrategy");
            return null;
        }

        for (CrawlStrategy strategy : strategies) {
            if (strategy.supports(url)) {
                logger.debug("Found strategy {} for URL: {}", strategy.getClass().getSimpleName(), url);
                return strategy;
            }
        }

        logger.warn("No strategy found for URL: {}", url);
        return null;
    }

    public void registerStrategy(CrawlStrategy strategy) {
        if (strategy != null) {
            strategies.add(strategy);
            logger.info("Registered new strategy: {}", strategy.getClass().getSimpleName());
        }
    }
}