decrement JdbcParameter memory used

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterDate.java

@@ -4,7 +4,7 @@ import java.sql.Types;
 import java.util.Calendar;
 import java.util.Date;
 
-public class JdbcParameterDate implements JdbcParameter {
+public final class JdbcParameterDate implements JdbcParameter {
 
     private final Date value;
 

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterDecimal.java

@@ -4,7 +4,7 @@ import java.math.BigDecimal;
 import java.sql.Types;
 import java.util.Calendar;
 
-public class JdbcParameterDecimal implements JdbcParameter {
+public final class JdbcParameterDecimal implements JdbcParameter {
 
     private final BigDecimal value;
 

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterImpl.java

@@ -2,7 +2,7 @@ package com.alibaba.druid.proxy.jdbc;
 
 import java.util.Calendar;
 
-public class JdbcParameterImpl implements JdbcParameter {
+public final class JdbcParameterImpl implements JdbcParameter {
 
     private final int      sqlType;
     private final Object   value;

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterInt.java

@@ -3,7 +3,7 @@ package com.alibaba.druid.proxy.jdbc;
 import java.sql.Types;
 import java.util.Calendar;
 
-public class JdbcParameterInt implements JdbcParameter {
+public final class JdbcParameterInt implements JdbcParameter {
 
     private final int value;
 

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterLong.java

@@ -3,7 +3,7 @@ package com.alibaba.druid.proxy.jdbc;
 import java.sql.Types;
 import java.util.Calendar;
 
-public class JdbcParameterLong implements JdbcParameter {
+public final class JdbcParameterLong implements JdbcParameter {
 
     private final long value;
 

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterNull.java

@@ -2,7 +2,7 @@ package com.alibaba.druid.proxy.jdbc;
 
 import java.util.Calendar;
 
-public class JdbcParameterNull implements JdbcParameter {
+public final class JdbcParameterNull implements JdbcParameter {
 
     private final int sqlType;
 

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterString.java

@@ -3,7 +3,7 @@ package com.alibaba.druid.proxy.jdbc;
 import java.sql.Types;
 import java.util.Calendar;
 
-public class JdbcParameterString implements JdbcParameter {
+public final class JdbcParameterString implements JdbcParameter {
 
     private final String value;
 

src/main/java/com/alibaba/druid/proxy/jdbc/JdbcParameterTimestamp.java

@@ -1,14 +1,14 @@
 package com.alibaba.druid.proxy.jdbc;
 
+import java.sql.Timestamp;
 import java.sql.Types;
 import java.util.Calendar;
-import java.util.Date;
 
-public class JdbcParameterTimestamp implements JdbcParameter {
+public final class JdbcParameterTimestamp implements JdbcParameter {
 
-    private final Date value;
+    private final Timestamp value;
 
-    public JdbcParameterTimestamp(Date value){
+    public JdbcParameterTimestamp(Timestamp value){
         this.value = value;
     }
 

src/test/java/com/alibaba/druid/bvt/filter/FilterChainTest_Clob_2.java

@@ -30,6 +30,7 @@ import com.alibaba.druid.pool.DruidDataSource;
 import com.alibaba.druid.proxy.jdbc.CallableStatementProxy;
 import com.alibaba.druid.proxy.jdbc.CallableStatementProxyImpl;
 import com.alibaba.druid.proxy.jdbc.ClobProxy;
+import com.alibaba.druid.proxy.jdbc.ConnectionProxyImpl;
 import com.alibaba.druid.util.JdbcUtils;
 
 public class FilterChainTest_Clob_2 extends TestCase {
@@ -51,7 +52,7 @@ public class FilterChainTest_Clob_2 extends TestCase {
             }
         };
 
-        statement = new CallableStatementProxyImpl(null, mockStmt, "", 1);
+        statement = new CallableStatementProxyImpl(new ConnectionProxyImpl(null, null, null, 0), mockStmt, "", 1);
 
     }
 
@@ -69,16 +70,15 @@ public class FilterChainTest_Clob_2 extends TestCase {
         Assert.assertTrue(clob instanceof ClobProxy);
         Assert.assertEquals(1, invokeCount);
     }
-    
+
     public void test_getClob_1() throws Exception {
         FilterChainImpl chain = new FilterChainImpl(dataSource);
-        
+
         Clob clob = chain.callableStatement_getClob(statement, "1");
-        
+
         Assert.assertTrue(clob instanceof ClobProxy);
         Assert.assertEquals(1, invokeCount);
     }
-    
 
     public void test_getObject() throws Exception {
         FilterChainImpl chain = new FilterChainImpl(dataSource);
@@ -88,30 +88,30 @@ public class FilterChainTest_Clob_2 extends TestCase {
         Assert.assertTrue(clob instanceof ClobProxy);
         Assert.assertEquals(1, invokeCount);
     }
-    
+
     public void test_getObject_1() throws Exception {
         FilterChainImpl chain = new FilterChainImpl(dataSource);
-        
+
         Clob clob = (Clob) chain.callableStatement_getObject(statement, "1");
-        
+
         Assert.assertTrue(clob instanceof ClobProxy);
         Assert.assertEquals(1, invokeCount);
     }
-    
+
     public void test_getObject_2() throws Exception {
         FilterChainImpl chain = new FilterChainImpl(dataSource);
 
-        Clob clob = (Clob) chain.callableStatement_getObject(statement, 1, Collections.<String, Class<?>>emptyMap());
+        Clob clob = (Clob) chain.callableStatement_getObject(statement, 1, Collections.<String, Class<?>> emptyMap());
 
         Assert.assertTrue(clob instanceof ClobProxy);
         Assert.assertEquals(1, invokeCount);
     }
-    
+
     public void test_getObject_3() throws Exception {
         FilterChainImpl chain = new FilterChainImpl(dataSource);
-        
-        Clob clob = (Clob) chain.callableStatement_getObject(statement, "1", Collections.<String, Class<?>>emptyMap());
-        
+
+        Clob clob = (Clob) chain.callableStatement_getObject(statement, "1", Collections.<String, Class<?>> emptyMap());
+
         Assert.assertTrue(clob instanceof ClobProxy);
         Assert.assertEquals(1, invokeCount);
     }

src/test/java/com/alibaba/druid/bvt/filter/FilterChainTest_NClob_2.java

@@ -29,6 +29,7 @@ import com.alibaba.druid.mock.MockNClob;
 import com.alibaba.druid.pool.DruidDataSource;
 import com.alibaba.druid.proxy.jdbc.CallableStatementProxy;
 import com.alibaba.druid.proxy.jdbc.CallableStatementProxyImpl;
+import com.alibaba.druid.proxy.jdbc.ConnectionProxyImpl;
 import com.alibaba.druid.proxy.jdbc.NClobProxy;
 import com.alibaba.druid.util.JdbcUtils;
 
@@ -51,7 +52,7 @@ public class FilterChainTest_NClob_2 extends TestCase {
             }
         };
 
-        statement = new CallableStatementProxyImpl(null, mockStmt, "", 1);
+        statement = new CallableStatementProxyImpl(new ConnectionProxyImpl(null, null, null, 0), mockStmt, "", 1);
 
     }