org.ujorm.orm.ao

Class IndexModelOrderedBuilder

java.lang.Object

org.ujorm.orm.ao.IndexModelBuilder

org.ujorm.orm.ao.IndexModelOrderedBuilder

public class IndexModelOrderedBuilder
extends IndexModelBuilder

Database meta index model builder with a user ordered columns support. Two columns of a database composite index can be ordered according a number at the end of a index name separated by the character '#'. Two index columns with the same order value are sorted according to the natural order of the Keys in the Ujo class. The default order value (with no number in the index name) is 10.
See the next example to create a composite index with two columns in a reverted order:

   private static final String IDX_STATE_COUNT = "idx_state_count";

   @Column(index = IDX_STATE_COUNT + "#30")
   public static final Key<XOrder, State> STATE = newKey();

   @Column(index = IDX_STATE_COUNT + "#20")
   public static final Key<XOrder, Integer> COUNT = newKey();
 

The builder class can be changed by the parameter MetaParams.INDEX_MODEL_BUILDER in time of building a meta-model according the next example:

   MetaParams params = new MetaParams();
   params.set(MetaParams.INDEX_MODEL_BUILDER, IndexModelOrderedBuilder.class);
   ormHandler.config(params);
 

See Also:

MetaParams.INDEX_MODEL_BUILDER

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	IndexModelOrderedBuilder.OrderedColumn Container for the Index model with an order request

Field Summary

Fields

Modifier and Type	Field and Description
protected static Integer	DEFAULT_ORDER The default index column value is 10

Fields inherited from class org.ujorm.orm.ao.IndexModelBuilder

mapIndex, metaTable, nameProvider

Constructor Summary

Constructors

Constructor and Description
IndexModelOrderedBuilder()

Method Summary

Modifier and Type	Method and Description
protected void	addIndex(String indexName, MetaColumn column, boolean unique) Add the column model to the column model from the IndexMap according the column name (case insensitive)
protected void	addToResult(List<IndexModelOrderedBuilder.OrderedColumn> columns, List<MetaIndex> result) Add the column to the result index list
Collection<MetaIndex>	getIndexModels() Returns all indexes of the current table
protected char	getOrderSerparator() Returns a separator of the column order from an index name.

Methods inherited from class org.ujorm.orm.ao.IndexModelBuilder

addColumnsToIndex, init, isExtendedIndexStrategy

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_ORDER

protected static final Integer DEFAULT_ORDER

The default index column value is 10

Constructor Detail

IndexModelOrderedBuilder

public IndexModelOrderedBuilder()

Method Detail

getOrderSerparator

protected char getOrderSerparator()

Returns a separator of the column order from an index name.

Returns:

The default value is '#'

See Also:

DEFAULT_ORDER

addIndex

protected void addIndex(String indexName,
                        MetaColumn column,
                        boolean unique)

Add the column model to the column model from the IndexMap according the column name (case insensitive)

Overrides:

addIndex in class IndexModelBuilder

Parameters:

indexName - Case sensitive column name

column - Column model

unique - Unique column request

getIndexModels

public Collection<MetaIndex> getIndexModels()

Returns all indexes of the current table

Overrides:

getIndexModels in class IndexModelBuilder

Returns:

Collection of the Index model

addToResult

protected void addToResult(List<IndexModelOrderedBuilder.OrderedColumn> columns,
                           List<MetaIndex> result)

Add the column to the result index list