01: /*
02:
03: Derby - Class org.apache.derby.impl.jdbc.EmbedStatement40
04:
05: Licensed to the Apache Software Foundation (ASF) under one or more
06: contributor license agreements. See the NOTICE file distributed with
07: this work for additional information regarding copyright ownership.
08: The ASF licenses this file to you under the Apache License, Version 2.0
09: (the "License"); you may not use this file except in compliance with
10: the License. You may obtain a copy of the License at
11:
12: http://www.apache.org/licenses/LICENSE-2.0
13:
14: Unless required by applicable law or agreed to in writing, software
15: distributed under the License is distributed on an "AS IS" BASIS,
16: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17: See the License for the specific language governing permissions and
18: limitations under the License.
19:
20: */
21:
22: package org.apache.derby.impl.jdbc;
23:
24: import java.sql.SQLException;
25: import org.apache.derby.iapi.reference.SQLState;
26:
27: public class EmbedStatement40 extends EmbedStatement {
28:
29: /**
30: * calls superclass contructor with the parameter passed
31: *
32: * @param connection EmbedConnection object associated with this
33: * statement
34: * @param forMetaData boolean
35: * @param resultSetType int
36: * @param resultSetConcurrency int
37: * @param resultSetHoldability int
38: *
39: */
40: public EmbedStatement40(EmbedConnection connection,
41: boolean forMetaData, int resultSetType,
42: int resultSetConcurrency, int resultSetHoldability) {
43: super (connection, forMetaData, resultSetType,
44: resultSetConcurrency, resultSetHoldability);
45: }
46:
47: /**
48: * Returns false unless <code>interfaces</code> is implemented
49: *
50: * @param interfaces a Class defining an interface.
51: * @return true if this implements the interface or
52: * directly or indirectly wraps an object
53: * that does.
54: * @throws java.sql.SQLException if an error occurs while determining
55: * whether this is a wrapper for an object
56: * with the given interface.
57: */
58: public boolean isWrapperFor(Class<?> interfaces)
59: throws SQLException {
60: checkStatus();
61: return interfaces.isInstance(this );
62: }
63:
64: /**
65: * Returns <code>this</code> if this class implements the interface
66: *
67: * @param interfaces a Class defining an interface
68: * @return an object that implements the interface
69: * @throws java.sql.SQLExption if no object if found that implements the
70: * interface
71: */
72: public <T> T unwrap(java.lang.Class<T> interfaces)
73: throws SQLException {
74: checkStatus();
75: try {
76: return interfaces.cast(this );
77: } catch (ClassCastException cce) {
78: throw newSQLException(SQLState.UNABLE_TO_UNWRAP, interfaces);
79: }
80: }
81:
82: }
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