package foundation.right;

import java.util.HashMap;
import java.util.Map;

public class RangePool {

	private Range range;
	private Map<String, Object> dataMap;
	
	public RangePool(Range range) {
		dataMap = new HashMap<String, Object>();
	}
	
	public String apply(String key, RightAssistant assistant) {
		synchronized (this) {
			//1. 如果还没有申请过
			if (!dataMap.containsKey(key)) {
				Object data = assistant.createData(key);
				dataMap.put(key, data);
				assistant.setResult(data, true);
				return key;
			}
			
			//2. 如果已经申请过了
			Object data = dataMap.get(key);
			if (assistant.isExpired(data)) {
				// 如果已经过期，就允许申请
				data = assistant.createData(key);
				dataMap.put(key, data);
				assistant.setResult(data, true);
				return key;				
			}
			
			//3. 已经申请，而且没有过期
			assistant.setResult(data, false);
		}
		
		return key;			
	}
	
	public void release(String key, RightAssistant assistant) {
		
	}

	@Override
	public String toString() {
		return range + " Pool " + dataMap.size();
	}
	
}