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Java > Open Source Codes > org > apache > cayenne > access > jdbc > BindObjectNotEqualDirective


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19 package org.apache.cayenne.access.jdbc;
20
21 import java.io.IOException JavaDoc;
22 import java.io.Writer JavaDoc;
23
24 import org.apache.velocity.context.InternalContextAdapter;
25
26 /**
27  * A custom Velocity directive to create a set of SQL conditions to check unequality of an
28  * ObjectId of an object. Usage in Velocity template is "WHERE
29  * #bindObjectNotEqual($object)" or "WHERE #bindObjectNotEqual($object $columns
30  * $idValues)".
31  *
32  * @since 3.0
33  * @author Andrus Adamchik
34  */
35 public class BindObjectNotEqualDirective extends BindObjectEqualDirective {
36
37     public String JavaDoc getName() {
38         return "bindObjectNotEqual";
39     }
40
41     protected void renderColumn(
42             InternalContextAdapter context,
43             Writer JavaDoc writer,
44             Object JavaDoc columnName,
45             int columnIndex) throws IOException JavaDoc {
46
47         if (columnIndex > 0) {
48             writer.write(" OR ");
49         }
50
51         writer.write(columnName.toString());
52     }
53
54     protected void render(
55             InternalContextAdapter context,
56             Writer JavaDoc writer,
57             ParameterBinding binding) throws IOException JavaDoc {
58
59         if (binding.getValue() != null) {
60             bind(context, binding);
61             writer.write("<> ?");
62         }
63         else {
64             writer.write("IS NOT NULL");
65         }
66     }
67 }
68
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