Package io.github.blyznytsiaorg.bibernate.ddl.field

Class ManyToManyFieldResolver

java.lang.Object

io.github.blyznytsiaorg.bibernate.ddl.field.ManyToManyFieldResolver

All Implemented Interfaces:

FieldResolver

public class ManyToManyFieldResolver
extends Object
implements FieldResolver

The ManyToManyFieldResolver class implements the FieldResolver interface to handle Many-to-Many relationships defined in entity classes. It generates necessary Data Definition Language (DDL) queries for creating join tables and foreign key constraints.

Since:

1.0

Author:

Blyzhnytsia Team

See Also:

• FieldResolver

Field Summary

Fields

Modifier and Type	Field	Description
static final String	CREATE_TABLE_MANY_TO_MANY
static final String	DROP_TABLE

Fields inherited from interface io.github.blyznytsiaorg.bibernate.ddl.field.FieldResolver

CREATE_CONSTRAINT, DROP_CONSTRAINT, NAME_DATA_PATTERN

Constructor Summary

Constructors

Constructor	Description
ManyToManyFieldResolver()

Method Summary

Modifier and Type	Method	Description
void	handleField(DDLFieldMetadataHolder metadataHolder, Map<Integer,List<String>> ddlMetadata)	Handles the Many-to-Many field by creating the necessary DDL queries.
boolean	hasFieldToResolve(EntityColumnDetails entityColumnDetails)	Determines whether the given entity column represents a Many-to-Many relationship.
private void	processForeignKeyConstraintInverseJoinColumn(String foreignKey, Set<String> foreignNameConstraints, String joinTableName, EntityMetadata relationEntityMetadata, String inverseJoinColumnName, Map<Integer,List<String>> ddlMetadata)	Processes the creation of a foreign key constraint for the inverse join column in a Many-to-Many relationship.
private void	processForeignKeyConstraintJoinColumn(Set<String> foreignNameConstraints, String tableName, String foreignKey, String joinTableName, String joinColumnName, Map<Integer,List<String>> ddlMetadata)	Processes the creation of a foreign key constraint for the join column in a Many-to-Many relationship.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.github.blyznytsiaorg.bibernate.ddl.field.FieldResolver

checkForeignKeyName

Field Details

CREATE_TABLE_MANY_TO_MANY

public static final String CREATE_TABLE_MANY_TO_MANY

See Also:

• Constant Field Values

DROP_TABLE

public static final String DROP_TABLE

See Also:

• Constant Field Values

Constructor Details

ManyToManyFieldResolver

public ManyToManyFieldResolver()

Method Details

hasFieldToResolve

public boolean hasFieldToResolve(EntityColumnDetails entityColumnDetails)

Determines whether the given entity column represents a Many-to-Many relationship.

Specified by:

hasFieldToResolve in interface FieldResolver

Parameters:

entityColumnDetails - the details of the entity column

Returns:

true if the column represents a Many-to-Many relationship, otherwise false

handleField

public void handleField(DDLFieldMetadataHolder metadataHolder,
 Map<Integer,List<String>> ddlMetadata)

Handles the Many-to-Many field by creating the necessary DDL queries.

Specified by:

handleField in interface FieldResolver

Parameters:

metadataHolder - the holder containing metadata information

ddlMetadata - the DDL metadata map

processForeignKeyConstraintJoinColumn

private void processForeignKeyConstraintJoinColumn(Set<String> foreignNameConstraints,
 String tableName,
 String foreignKey,
 String joinTableName,
 String joinColumnName,
 Map<Integer,List<String>> ddlMetadata)

Processes the creation of a foreign key constraint for the join column in a Many-to-Many relationship.

Parameters:

foreignNameConstraints - the set containing the names of existing foreign key constraints

tableName - the name of the table containing the join column

foreignKey - the name of the foreign key constraint

joinTableName - the name of the join table

joinColumnName - the name of the join column

ddlMetadata - the metadata map for storing DDL queries

processForeignKeyConstraintInverseJoinColumn

private void processForeignKeyConstraintInverseJoinColumn(String foreignKey,
 Set<String> foreignNameConstraints,
 String joinTableName,
 EntityMetadata relationEntityMetadata,
 String inverseJoinColumnName,
 Map<Integer,List<String>> ddlMetadata)

Processes the creation of a foreign key constraint for the inverse join column in a Many-to-Many relationship.

Parameters:

foreignKey - the name of the foreign key constraint

foreignNameConstraints - the set containing the names of existing foreign key constraints

joinTableName - the name of the join table

relationEntityMetadata - the metadata of the related entity

inverseJoinColumnName - the name of the inverse join column

ddlMetadata - the metadata map for storing DDL queries