package com.laozizhu.search;

import java.util.Iterator;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 解析引擎工廠。<br>
 * 通過Spring注入可用的引擎數(shù)據(jù).<br>
 * 當(dāng)然，你也可以通過set方法動態(tài)添加。
 * 
 * @author 老紫竹(laozizhu.com)
 */
public class EngineFactory {
  public Map<String, Engine> getEngineMap() {
    return engineMap;
  }

  public void setEngineMap(Map<String, Engine> engineMap) {
    this.engineMap = engineMap;
  }

  private Map<String, Engine> engineMap;

  public Engine getInstance(String url) {
    Iterator<String> it = getEngineMap().keySet().iterator();
    Pattern p;
    Matcher m = null;
    String s;
    while (it.hasNext()) {
      s = it.next();
      p = Pattern.compile(s);
      m = p.matcher(url);
      if (m.find()) {
        return getEngineMap().get(s);
      }
    }
    return null;
  }
}