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Java > Open Source Codes > org > objectstyle > cayenne > access > trans > TrimmingQualifierTranslator


1 /* ====================================================================
2  *
3  * The ObjectStyle Group Software License, version 1.1
4  * ObjectStyle Group - http://objectstyle.org/
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6  * Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
7  * of the software. All rights reserved.
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10  * modification, are permitted provided that the following conditions
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22  * must include the following acknowlegement:
23  * "This product includes software developed by independent contributors
24  * and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
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29  * or promote products derived from this software without prior written
30  * permission. For written permission, email
31  * "andrus at objectstyle dot org".
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51  * This software consists of voluntary contributions made by many
52  * individuals and hosted on ObjectStyle Group web site. For more
53  * information on the ObjectStyle Group, please see
54  * <http://objectstyle.org/>.
55  */
56
57 package org.objectstyle.cayenne.access.trans;
58
59 import java.sql.Types JavaDoc;
60
61 import org.objectstyle.cayenne.map.DbAttribute;
62 import org.objectstyle.cayenne.map.DbRelationship;
63
64 /**
65  * QualifierTranslator that allows translation of qualifiers that perform
66  * comparison with CHAR columns. Some databases require trimming the values for
67  * this to work.
68  *
69  * @author Andrei Adamchik
70  */
71 public class TrimmingQualifierTranslator extends QualifierTranslator {
72
73     protected String JavaDoc trimFunction;
74
75     /**
76      * Constructor for TrimmingQualifierTranslator.
77      */
78     protected TrimmingQualifierTranslator() {
79         super();
80     }
81
82     /**
83      * Constructor for TrimmingQualifierTranslator.
84      */
85     public TrimmingQualifierTranslator(
86         QueryAssembler queryAssembler,
87         String JavaDoc trimFunction) {
88         super(queryAssembler);
89         this.trimFunction = trimFunction;
90     }
91
92     /**
93      * Adds special handling of CHAR columns.
94      */
95     protected void processColumn(StringBuffer JavaDoc buf, DbAttribute dbAttr) {
96         if (dbAttr.getType() == Types.CHAR) {
97             buf.append(trimFunction).append("(");
98             super.processColumn(buf, dbAttr);
99             buf.append(')');
100         } else {
101             super.processColumn(buf, dbAttr);
102         }
103     }
104
105     /**
106      * Adds special handling of CHAR columns.
107      */
108     protected void processColumn(
109         StringBuffer JavaDoc buf,
110         DbAttribute dbAttr,
111         DbRelationship rel) {
112         if (dbAttr.getType() == Types.CHAR) {
113             buf.append(trimFunction).append("(");
114             super.processColumn(buf, dbAttr, rel);
115             buf.append(')');
116         } else {
117             super.processColumn(buf, dbAttr, rel);
118         }
119     }
120
121     /**
122      * Returns the trimFunction.
123      * @return String
124      */
125     public String JavaDoc getTrimFunction() {
126         return trimFunction;
127     }
128
129     /**
130      * Sets the trimFunction.
131      * @param trimFunction The trimFunction to set
132      */
133     public void setTrimFunction(String JavaDoc trimFunction) {
134         this.trimFunction = trimFunction;
135     }
136 }
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