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82 lines
3.5 KiB
82 lines
3.5 KiB
import java.time.LocalDate;
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import java.util.ArrayList;
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import java.util.Comparator;
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import java.util.List;
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import java.util.regex.Pattern;
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// ─────────────────────────────────────────────
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// 策略接口
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// ─────────────────────────────────────────────
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interface ParseStrategy {
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boolean supports(String url);
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Article parse(String url);
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String getName();
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default int getPriority() { return 100; }
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}
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// ─────────────────────────────────────────────
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// 策略实现1：GitHub 专属（priority=10）
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// ─────────────────────────────────────────────
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class GithubParseStrategy implements ParseStrategy {
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@Override
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public boolean supports(String url) {
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return url != null && url.matches("^https?://(www\\.)?github\\.com/.*");
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}
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@Override
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public Article parse(String url) {
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String path = url.replaceFirst("https?://(www\\.)?github\\.com/", "");
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String[] parts = path.split("/");
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String owner = parts.length > 0 ? parts[0] : "unknown";
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String repo = parts.length > 1 ? parts[1] : "repo";
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return new Article("[GitHub] " + owner + "/" + repo, url,
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"(GitHub stub)", owner, LocalDate.now());
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}
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@Override public String getName() { return "GithubParseStrategy"; }
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@Override public int getPriority(){ return 10; }
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}
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// ─────────────────────────────────────────────
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// 策略实现2：通用默认兜底（priority=999）
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// ─────────────────────────────────────────────
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class DefaultParseStrategy implements ParseStrategy {
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private static final Pattern URL_PATTERN =
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Pattern.compile("^https?://[^\\s/$.?#].[^\\s]*$");
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@Override
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public boolean supports(String url) {
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return url != null && URL_PATTERN.matcher(url).matches();
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}
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@Override
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public Article parse(String url) {
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String domain = url.replaceFirst("https?://", "").replaceAll("/.*", "");
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return new Article("文章来自 " + domain, url,
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"(default stub)", "unknown", LocalDate.now());
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}
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@Override public String getName() { return "DefaultParseStrategy"; }
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@Override public int getPriority(){ return 999; }
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}
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// ─────────────────────────────────────────────
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// 策略选择器
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// ─────────────────────────────────────────────
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class StrategySelector {
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private final List<ParseStrategy> strategies = new ArrayList<>();
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public StrategySelector() {
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strategies.add(new GithubParseStrategy());
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strategies.add(new DefaultParseStrategy());
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strategies.sort(Comparator.comparingInt(ParseStrategy::getPriority));
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}
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public ParseStrategy select(String url) {
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return strategies.stream()
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.filter(s -> s.supports(url))
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.findFirst().orElse(null);
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}
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public List<ParseStrategy> getAll() { return List.copyOf(strategies); }
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}
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