| 1 | /* |
| 2 | |
| 3 | Derby - Class org.apache.derby.impl.sql.conn.CachedStatement |
| 4 | |
| 5 | Copyright 1997, 2004 The Apache Software Foundation or its licensors, as applicable. |
| 6 | |
| 7 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 8 | you may not use this file except in compliance with the License. |
| 9 | You may obtain a copy of the License at |
| 10 | |
| 11 | http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | |
| 13 | Unless required by applicable law or agreed to in writing, software |
| 14 | distributed under the License is distributed on an "AS IS" BASIS, |
| 15 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | See the License for the specific language governing permissions and |
| 17 | limitations under the License. |
| 18 | |
| 19 | */ |
| 20 | |
| 21 | package org.apache.derby.impl.sql.conn; |
| 22 | |
| 23 | import org.apache.derby.iapi.services.context.ContextManager; |
| 24 | |
| 25 | import org.apache.derby.iapi.error.StandardException; |
| 26 | import org.apache.derby.impl.sql.GenericPreparedStatement; |
| 27 | import org.apache.derby.impl.sql.GenericStatement; |
| 28 | |
| 29 | import org.apache.derby.iapi.sql.conn.LanguageConnectionContext; |
| 30 | |
| 31 | import org.apache.derby.iapi.sql.PreparedStatement; |
| 32 | |
| 33 | import org.apache.derby.iapi.services.cache.Cacheable; |
| 34 | |
| 35 | import org.apache.derby.iapi.services.sanity.SanityManager; |
| 36 | |
| 37 | import org.apache.derby.iapi.services.monitor.Monitor; |
| 38 | |
| 39 | /** |
| 40 | @author ames |
| 41 | */ |
| 42 | public class CachedStatement implements Cacheable { |
| 43 | |
| 44 | private GenericPreparedStatement ps; |
| 45 | private Object identity; |
| 46 | |
| 47 | public CachedStatement() { |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * Get the PreparedStatement that is associated with this Cacheable |
| 52 | */ |
| 53 | public GenericPreparedStatement getPreparedStatement() { |
| 54 | return ps; |
| 55 | } |
| 56 | |
| 57 | /* Cacheable interface */ |
| 58 | |
| 59 | /** |
| 60 | |
| 61 | @see Cacheable#clean |
| 62 | */ |
| 63 | public void clean(boolean forRemove) { |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | */ |
| 68 | public Cacheable setIdentity(Object key) { |
| 69 | |
| 70 | identity = key; |
| 71 | ps = new GenericPreparedStatement((GenericStatement) key); |
| 72 | ps.setCacheHolder(this); |
| 73 | |
| 74 | return this; |
| 75 | } |
| 76 | |
| 77 | /** @see Cacheable#createIdentity */ |
| 78 | public Cacheable createIdentity(Object key, Object createParameter) { |
| 79 | if (SanityManager.DEBUG) |
| 80 | SanityManager.THROWASSERT("Not expecting any create() calls"); |
| 81 | |
| 82 | return null; |
| 83 | |
| 84 | } |
| 85 | |
| 86 | /** @see Cacheable#clearIdentity */ |
| 87 | public void clearIdentity() { |
| 88 | |
| 89 | if (SanityManager.DEBUG) |
| 90 | SanityManager.DEBUG("StatementCacheInfo","CLEARING IDENTITY: "+ps.getSource()); |
| 91 | ps.setCacheHolder(null); |
| 92 | |
| 93 | identity = null; |
| 94 | ps = null; |
| 95 | } |
| 96 | |
| 97 | /** @see Cacheable#getIdentity */ |
| 98 | public Object getIdentity() { |
| 99 | return identity; |
| 100 | } |
| 101 | |
| 102 | /** @see Cacheable#isDirty */ |
| 103 | public boolean isDirty() { |
| 104 | return false; |
| 105 | } |
| 106 | |
| 107 | /* Cacheable interface */ |
| 108 | } |