java/w10/StrategyFactory.java

package com.example.datacollect.strategy;

import java.util.ArrayList;
import java.util.List;

public class StrategyFactory {
    private final List<CrawlStrategy> strategies = new ArrayList<>();

    public StrategyFactory() {
        strategies.add(new HnuNewsStrategy());
        strategies.add(new BlogStrategy());
        strategies.add(new NewsStrategy());
        strategies.add(new HnuNoticeStrategy());
    }

    public CrawlStrategy getStrategy(String url) {
        for (CrawlStrategy s : strategies) {
            if (s.supports(url)) {
                return s;
            }
        }
        return null;
    }

    public void register(CrawlStrategy strategy) {
        strategies.add(strategy);
    }
}