Share project "druid" into "http://code.alibabatech.com/svn/druid"

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@2 b9813039-fb51-4c41-a8b9-e21c2acb5095

src/main/java/com/alibaba/druid/pool/PreparedStatementPool.java

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+/**
+ * Project: druid
+ * 
+ * File Created at 2011-2-24
+ * $Id$
+ * 
+ * Copyright 1999-2100 Alibaba.com Corporation Limited.
+ * All rights reserved.
+ *
+ * This software is the confidential and proprietary information of
+ * Alibaba Company. ("Confidential Information").  You shall not
+ * disclose such Confidential Information and shall use it only in
+ * accordance with the terms of the license agreement you entered into
+ * with Alibaba.com.
+ */
+package com.alibaba.druid.pool;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
+import com.alibaba.druid.pool.PoolablePreparedStatement.PreparedStatementKey;
+
+/**
+ * 
+ * @author shaojin.wensj
+ *
+ */
+public class PreparedStatementPool {
+	private HashMap<PreparedStatementKey, List<PoolablePreparedStatement>> map = new HashMap<PreparedStatementKey, List<PoolablePreparedStatement>>();
+
+	public static enum MethodType {
+		M1, M2, M3, M4, M5, M6, Precall_1, Precall_2, Precall_3
+	}
+
+	public PoolablePreparedStatement get(PreparedStatementKey key) {
+		List<PoolablePreparedStatement> list = map.get(key);
+
+		if (list == null) {
+			list = new ArrayList<PoolablePreparedStatement>();
+			map.put(key, list);
+
+			return null;
+		}
+
+		int size = list.size();
+
+		if (size == 0) {
+			return null;
+		}
+
+		PoolablePreparedStatement last = list.remove(size - 1);
+
+		return last;
+	}
+
+	public void put(PoolablePreparedStatement poolableStatement) {
+		PreparedStatementKey key = poolableStatement.getKey();
+		List<PoolablePreparedStatement> list = map.get(key);
+
+		if (list == null) {
+			list = new ArrayList<PoolablePreparedStatement>();
+			map.put(key, list);
+		}
+		
+		list.add(poolableStatement);
+	}
+
+}