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[#1152] Add <E extends java.lang.Enum<E> & org.jooq.EnumType> E MySQLFactory.enumType(Class<E>, int) for enum reverse lookups of MySQL-specific enums

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This commit is contained in:
Lukas Eder 2012-02-16 18:25:13 +00:00
parent f095d9aaf1
commit d429f5a417
2 changed files with 67 additions and 0 deletions
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12
jOOQ-test/src/org/jooq/test/jOOQMySQLTest.java
View File

@ -36,6 +36,7 @@
package org.jooq.test;
import static junit.framework.Assert.assertNull;
import static org.jooq.impl.Factory.val;
import static org.jooq.test.mysql.generatedclasses.Tables.T_BOOK_TO_BOOK_STORE;
import static org.jooq.test.mysql.generatedclasses.Tables.T_IDENTITY_PK;
@ -75,6 +76,7 @@ import org.jooq.UpdatableTable;
import org.jooq.conf.Settings;
import org.jooq.test.mysql.generatedclasses.Routines;
import org.jooq.test.mysql.generatedclasses.TestFactory;
import org.jooq.test.mysql.generatedclasses.enums.TBookStatus;
import org.jooq.test.mysql.generatedclasses.enums.T_959JavaKeywords;
import org.jooq.test.mysql.generatedclasses.tables.TAuthor;
import org.jooq.test.mysql.generatedclasses.tables.TBook;
@ -728,4 +730,14 @@ public class jOOQMySQLTest extends jOOQAbstractTest<
assertEquals(T_959JavaKeywords.class_, result.get(1));
assertEquals(T_959JavaKeywords.public_, result.get(2));
}
@Test
public void testMySQLEnumIndex() throws Exception {
assertNull(MySQLFactory.enumType(TBookStatus.class, -1));
assertNull(MySQLFactory.enumType(TBookStatus.class, 0));
assertEquals(TBookStatus.SOLD_OUT, MySQLFactory.enumType(TBookStatus.class, 1));
assertEquals(TBookStatus.ORDERED, MySQLFactory.enumType(TBookStatus.class, 2));
assertEquals(TBookStatus.ON_STOCK, MySQLFactory.enumType(TBookStatus.class, 3));
assertNull(MySQLFactory.enumType(TBookStatus.class, 4));
}
}

55
jOOQ/src/main/java/org/jooq/util/mysql/MySQLFactory.java
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@ -37,6 +37,7 @@ package org.jooq.util.mysql;
import java.sql.Connection;
import org.jooq.EnumType;
import org.jooq.Field;
import org.jooq.SQLDialect;
import org.jooq.SchemaMapping;
@ -310,4 +311,58 @@ public class MySQLFactory extends Factory {
public static Field<String> password(Field<String> string) {
return function("password", String.class, string);
}
// -------------------------------------------------------------------------
// Other utilities
// -------------------------------------------------------------------------
/**
* Get a field based {@link EnumType} by its MySQL-specific index
* <p>
* If your MySQL enum type contains these three values: <code>A, B, C</code>
* , then this will be the mapping of indexes to values:
* <table border="1">
* <tr>
* <th>Enum literal as in {@link Enum#name()}</th>
* <th>Enum ordinal as in {@link Enum#ordinal()}</th>
* <th>MySQL index</th>
* </tr>
* <tr>
* <td><code>null</code></td>
* <td><code>-</code></td>
* <td><code>0</code></td>
* </tr>
* <tr>
* <td><code>A</code></td>
* <td><code>0</code></td>
* <td><code>1</code></td>
* </tr>
* <tr>
* <td><code>B</code></td>
* <td><code>1</code></td>
* <td><code>2</code></td>
* </tr>
* <tr>
* <td><code>C</code></td>
* <td><code>2</code></td>
* <td><code>3</code></td>
* </tr>
* </table>
* <p>
* See <a
* href="dev.mysql.com/doc/refman/5.5/en/enum.html">dev.mysql.com/doc/
* refman/5.5/en/enum.html</a> for more details about MySQL enum types
*/
public static <E extends java.lang.Enum<E> & org.jooq.EnumType> E enumType(Class<E> type, int index) {
if (index <= 0) {
return null;
}
E[] values = type.getEnumConstants();
if (index > values.length) {
return null;
}
return values[index - 1];
}
}