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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.openjpa.jdbc.meta;
import java.io.Serializable;
import java.sql.SQLException;
import org.apache.openjpa.jdbc.identifier.DBIdentifier;
import org.apache.openjpa.jdbc.schema.Column;
import org.apache.openjpa.jdbc.schema.ColumnIO;
import org.apache.openjpa.jdbc.schema.ForeignKey;
import org.apache.openjpa.jdbc.schema.Index;
import org.apache.openjpa.jdbc.schema.Unique;
import org.apache.openjpa.jdbc.sql.Row;
import org.apache.openjpa.kernel.OpenJPAStateManager;
import org.apache.openjpa.meta.MetaDataContext;
import org.apache.openjpa.meta.ValueMetaData;
/**
* Specialization of value metadata for relational databases.
*
* @author Abe White
* @since 0.4.0
*/
public interface ValueMapping
extends ValueMetaData, MetaDataContext, Serializable {
/**
* Standard forward join.
*/
int JOIN_FORWARD = 0;
/**
* Inverse join.
*/
int JOIN_INVERSE = 1;
/**
* Inverse join that is marked up as a forward join because the
* backing mapping expects an inverse direction.
*/
int JOIN_EXPECTED_INVERSE = 2;
/**
* A fully polymorphic relation (the default).
*/
int POLY_TRUE = 0;
/**
* A non-polymorphic relation.
*/
int POLY_FALSE = 1;
/**
* A relation that can hold any joinable subclass type.
*/
int POLY_JOINABLE = 2;
/**
* Raw mapping data.
*/
ValueMappingInfo getValueInfo();
/**
* The handler used for this value, or null if none.
*/
ValueHandler getHandler();
/**
* The handler used for this value, or null if none.
*/
void setHandler(ValueHandler handler);
/**
* Convenience method to perform cast from
* {@link ValueMetaData#getRepository}.
*/
MappingRepository getMappingRepository();
/**
* Convenience method to perform cast from
* {@link ValueMetaData#getFieldMetaData}.
*/
FieldMapping getFieldMapping();
/**
* Convenience method to perform cast from
* {@link ValueMetaData#getTypeMetaData}.
*/
ClassMapping getTypeMapping();
/**
* Convenience method to perform cast from
* {@link ValueMetaData#getDeclaredTypeMetaData}.
*/
ClassMapping getDeclaredTypeMapping();
/**
* Convenience method to perform cast from
* {@link ValueMetaData#getEmbeddedMetaData}.
*/
ClassMapping getEmbeddedMapping();
/**
* Convenience method to perform cast from
* {@link ValueMetaData#getValueMappedByMetaData}.
*/
FieldMapping getValueMappedByMapping();
/**
* The columns that hold the data for this value.
*/
Column[] getColumns();
/**
* The columns that hold the data for this value.
*/
void setColumns(Column[] cols);
/**
* I/O information on the foreign key, or columns if this value doesn't
* have a key.
*/
ColumnIO getColumnIO();
/**
* I/O information on the foreign key, or columns if this value doesn't
* have a key.
*/
void setColumnIO(ColumnIO io);
/**
* If this value joins to another record, the foreign key.
*/
ForeignKey getForeignKey();
/**
* Return an equivalent of this value's foreign key, but joining to the
* given target, which may be an unjoined subclass of this value's
* related type.
*/
ForeignKey getForeignKey(ClassMapping target);
/**
* If this value joins to another record, the foreign key.
*/
void setForeignKey(ForeignKey fk);
/**
* The join direction.
*/
int getJoinDirection();
/**
* The join direction.
*/
void setJoinDirection(int direction);
/**
* Sets this value's foreign key to the given related object. The object
* may be null.
*/
void setForeignKey(Row row, OpenJPAStateManager rel)
throws SQLException;
/**
* Sets this value's foreign key to the given related object. The object
* may be null. If the object is one of2or more foreign keys with the
* same target, the targetNumber specifies the one to set.
*/
void setForeignKey(Row row, OpenJPAStateManager rel, int targetNumber)
throws SQLException;
/**
* Sets this value's foreign key to the given related object. The object
* may be null.
*/
void whereForeignKey(Row row, OpenJPAStateManager rel)
throws SQLException;
/**
* Return all independently-mapped joinable types for this value, depending
* on whether this value is polymorphic and how the related type is mapped.
* Return an empty array if value type is not PC.
*/
ClassMapping[] getIndependentTypeMappings();
/**
* Return the {@link org.apache.openjpa.sql.Select} subclasses constant
* for loading this relation, based on how the related type is mapped,
* whether this relation is polymorphic, and whether it is configured to
* use class criteria.
*/
int getSelectSubclasses();
/**
* Unique constraint on this value's columns, or null if none.
*/
Unique getValueUnique();
/**
* Unique constraint on this value's columns, or null if none.
*/
void setValueUnique(Unique unq);
/**
* Index on this value's columns, or null if none.
*/
Index getValueIndex();
/**
* Index on this value's columns, or null if none.
*/
void setValueIndex(Index idx);
/**
* Whether to use class criteria when joining to related type.
*/
boolean getUseClassCriteria();
/**
* Whether to use class criteria when joining to related type.
*/
void setUseClassCriteria(boolean criteria);
/**
* The degree to which this relation is polymorphic.
*/
int getPolymorphic();
/**
* The degree to which this relation is polymorphic.
*/
void setPolymorphic(int polymorphic);
/**
* Increase the reference count on used schema components.
*/
void refSchemaComponents();
/**
* Map indexes and constraints for this value, using the current
* {@link ValueMappingInfo}. The foreign key or columns of this value
* must be set before calling this method.
* @deprecated
*/
@Deprecated void mapConstraints(String name, boolean adapt);
/**
* Map indexes and constraints for this value, using the current
* {@link ValueMappingInfo}. The foreign key or columns of this value
* must be set before calling this method.
*/
void mapConstraints(DBIdentifier name, boolean adapt);
/**
* Clear mapping information, including strategy.
*/
void clearMapping();
/**
* Update {@link MappingInfo} with our current mapping information.
*/
void syncMappingInfo();
/**
* Copy mapping info from the given instance to this one.
*/
void copyMappingInfo(ValueMapping vm);
}
