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51 * defined and deployed with both the reference and vendor implementations |
51 * defined and deployed with both the reference and vendor implementations |
52 * of the <code>FilteredRowSet</code> interface, this allows for a flexible |
52 * of the <code>FilteredRowSet</code> interface, this allows for a flexible |
53 * and application motivated implementations of <code>Predicate</code> to emerge. |
53 * and application motivated implementations of <code>Predicate</code> to emerge. |
54 * <p> |
54 * <p> |
55 * A sample implementation would look something like this: |
55 * A sample implementation would look something like this: |
56 * <pre> |
56 * <pre>{@code |
57 * <code> |
|
58 * public class Range implements Predicate { |
57 * public class Range implements Predicate { |
59 * |
58 * |
60 * private Object lo[]; |
59 * private Object lo[]; |
61 * private Object hi[]; |
60 * private Object hi[]; |
62 * private int idx[]; |
61 * private int idx[]; |
77 * for (int i = 0; i < idx.length; i++) { |
76 * for (int i = 0; i < idx.length; i++) { |
78 * |
77 * |
79 * if ((rs.getObject(idx[i]) >= lo[i]) && |
78 * if ((rs.getObject(idx[i]) >= lo[i]) && |
80 * (rs.getObject(idx[i]) >= hi[i]) { |
79 * (rs.getObject(idx[i]) >= hi[i]) { |
81 * bool1 = true; // within filter constraints |
80 * bool1 = true; // within filter constraints |
|
81 * } else { |
|
82 * bool2 = true; // outside of filter constraints |
|
83 * } |
|
84 * } |
|
85 * |
|
86 * if (bool2) { |
|
87 * return false; |
82 * } else { |
88 * } else { |
83 * bool2 = true; // outside of filter constraints |
89 * return true; |
84 * } |
90 * } |
85 * } |
91 * } |
86 * |
|
87 * if (bool2) { |
|
88 * return false; |
|
89 * } else { |
|
90 * return true; |
|
91 * } |
|
92 * } |
92 * } |
93 * </code> |
93 * }</pre> |
94 * </pre> |
|
95 * <P> |
94 * <P> |
96 * The example above implements a simple range predicate. Note, that |
95 * The example above implements a simple range predicate. Note, that |
97 * implementations should but are not required to provider <code>String</code> |
96 * implementations should but are not required to provider <code>String</code> |
98 * and integer index based constructors to provide for JDBC RowSet Implementation |
97 * and integer index based constructors to provide for JDBC RowSet Implementation |
99 * applications that use both column identification conventions. |
98 * applications that use both column identification conventions. |