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Java > Open Source Codes > org > apache > ojb > soda > QueryImpl


1 package org.apache.ojb.soda;
2
3 /* Copyright 2002-2005 The Apache Software Foundation
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17
18 import java.io.Serializable JavaDoc;
19
20 import org.odbms.Constraint;
21 import org.odbms.ObjectSet;
22 import org.odbms.Query;
23 import org.apache.ojb.broker.OJBRuntimeException;
24 import org.apache.ojb.broker.PersistenceBroker;
25
26 /**
27  * @author Thomas Mahler
28  * @version $Id: QueryImpl.java,v 1.7.2.1 2005/12/21 22:30:46 tomdz Exp $
29  */
30 public class QueryImpl implements Query, Serializable JavaDoc
31 {
32     static final long serialVersionUID = 7117766237756132776L;
33     private org.apache.ojb.broker.query.Query ojbQuery = null;
34     private int limitCount = -1;
35     private PersistenceBroker broker;
36
37     /**
38      * Constructor for QueryImpl.
39      */
40     public QueryImpl(PersistenceBroker broker)
41     {
42         super();
43         this.broker = broker;
44     }
45
46     /**
47      * wrapping constructor. needed only as long we
48      * don't support the soda constraint stuff.
49      */
50     public QueryImpl(org.apache.ojb.broker.query.Query query)
51     {
52         super();
53         ojbQuery = query;
54     }
55
56
57     /*
58      * @see Query#constrain(Object)
59      */
60     public Constraint constrain(Object JavaDoc example)
61     {
62         return null;
63     }
64
65     /*
66      * @see Query#execute()
67      */
68     public ObjectSet execute()
69     {
70         // in future versions soda queries will be translated
71 // into org.apache.ojb.broker.query.Query objects and placed
72 // into the ojbQuery member variable.
73
74         if (ojbQuery != null)
75         {
76             return new ObjectSetImpl(broker, ojbQuery, limitCount);
77         }
78         else throw new OJBRuntimeException("internal ojbQuery not filled. Can't execute this query yet!");
79     }
80
81     /*
82      * @see Query#descendant(String)
83      */
84     public Query descendant(String JavaDoc path)
85     {
86         return this;
87     }
88
89     /*
90      * @see Query#parent(String)
91      */
92     public Query parent(String JavaDoc path)
93     {
94         return this;
95     }
96
97     /*
98      * @see Query#limitSize(int)
99      */
100     public Query limitSize(int count)
101     {
102         limitCount = count;
103         return this;
104     }
105
106     /*
107      * @see Query#orderAscending()
108      */
109     public Query orderAscending()
110     {
111         return this;
112     }
113
114     /*
115      * @see Query#orderDescending()
116      */
117     public Query orderDescending()
118     {
119         return this;
120     }
121
122
123     /**
124      * Sets the ojbQuery, needed only as long we
125      * don't support the soda constraint stuff.
126      * @param ojbQuery The ojbQuery to set
127      */
128     public void setOjbQuery(org.apache.ojb.broker.query.Query ojbQuery)
129     {
130         this.ojbQuery = ojbQuery;
131     }
132
133 }
134
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