it.openutils.migration.generic
Class JdbcIfColumnIsNotNullableConditionalTask

java.lang.Object
  it.openutils.migration.task.setup.BaseDbTask
      it.openutils.migration.task.setup.BaseConditionalTask
          it.openutils.migration.generic.JdbcColumnBasedConditionalTask
              it.openutils.migration.generic.JdbcIfColumnIsNotNullableConditionalTask

All Implemented Interfaces:

DbTask

public class JdbcIfColumnIsNotNullableConditionalTask
extends JdbcColumnBasedConditionalTask

Task that executes if a given column is not nullable (IS_NULLABLE = NO).

Version:

$Id: JdbcIfColumnIsNotNullableConditionalTask.java 777 2008-04-27 14:24:19Z fgiust $

Author:

fgiust

Field Summary

Fields inherited from class it.openutils.migration.generic.JdbcColumnBasedConditionalTask

catalog, column, schema

Fields inherited from class it.openutils.migration.task.setup.BaseConditionalTask

ddl, log, not, scripts, variables

Fields inherited from class it.openutils.migration.task.setup.BaseDbTask

description

Constructor Summary

JdbcIfColumnIsNotNullableConditionalTask()

Method Summary

protected boolean

checkColumnMetadata(java.util.Map<java.lang.String,java.lang.Object> metadata) Check if a specific condition is met depending on column metadata.

Methods inherited from class it.openutils.migration.generic.JdbcColumnBasedConditionalTask

check, setCatalog, setColumn, setSchema

Methods inherited from class it.openutils.migration.task.setup.BaseConditionalTask

execute, executeSingle, getDescription, objectNameFromFileName, performSubstitution, setDdl, setDdlScript, setNot, setScripts

Methods inherited from class it.openutils.migration.task.setup.BaseDbTask

setDescription

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JdbcIfColumnIsNotNullableConditionalTask

public JdbcIfColumnIsNotNullableConditionalTask()

Method Detail

checkColumnMetadata

protected boolean checkColumnMetadata(java.util.Map<java.lang.String,java.lang.Object> metadata)

Check if a specific condition is met depending on column metadata.

Column attributes included in the Map are:

1. TABLE_CAT String => table catalog (may be null)
2. TABLE_SCHEM String => table schema (may be null)
3. TABLE_NAME String => table name
4. COLUMN_NAME String => column name
5. DATA_TYPE int => SQL type from java.sql.Types
6. TYPE_NAME String => Data source dependent type name, for a UDT the type name is fully qualified
7. COLUMN_SIZE int => column size.
8. BUFFER_LENGTH is not used.
9. DECIMAL_DIGITS int => the number of fractional digits. Null is returned for data types where DECIMAL_DIGITS is not applicable.
10. NUM_PREC_RADIX int => Radix (typically either 10 or 2)
11. NULLABLE int => is NULL allowed.
• columnNoNulls - might not allow NULL values
• columnNullable - definitely allows NULL values
• columnNullableUnknown - nullability unknown
12. REMARKS String => comment describing column (may be null)
13. COLUMN_DEF String => default value for the column, which should be interpreted as a string when the value is enclosed in single quotes (may be null)
14. SQL_DATA_TYPE int => unused
15. SQL_DATETIME_SUB int => unused
16. CHAR_OCTET_LENGTH int => for char types the maximum number of bytes in the column
17. ORDINAL_POSITION int => index of column in table (starting at 1)
18. IS_NULLABLE String => ISO rules are used to determine the nullability for a column.
• YES --- if the parameter can include NULLs
• NO --- if the parameter cannot include NULLs
• empty string --- if the nullability for the parameter is unknown
19. SCOPE_CATLOG String => catalog of table that is the scope of a reference attribute (null if DATA_TYPE isn't REF)
20. SCOPE_SCHEMA String => schema of table that is the scope of a reference attribute (null if the DATA_TYPE isn't REF)
21. SCOPE_TABLE String => table name that this the scope of a reference attribure (null if the DATA_TYPE isn't REF)
22. SOURCE_DATA_TYPE short => source type of a distinct type or user-generated Ref type, SQL type from java.sql.Types (null if DATA_TYPE isn't DISTINCT or user-generated REF)
23. IS_AUTOINCREMENT String => Indicates whether this column is auto incremented
• YES --- if the column is auto incremented
• NO --- if the column is not auto incremented
• empty string --- if it cannot be determined whether the column is auto incremented parameter is unknown

Specified by:

checkColumnMetadata in class JdbcColumnBasedConditionalTask

Parameters:

metadata - column metadata

Returns:

true if the condition is met