org.ujorm.orm.metaModel
Class MetaColumn

java.lang.Object
  org.ujorm.extensions.SuperAbstractUjo
      org.ujorm.extensions.AbstractUjo
          org.ujorm.orm.AbstractMetaModel
              org.ujorm.orm.metaModel.MetaRelation2Many
                  org.ujorm.orm.metaModel.MetaColumn

All Implemented Interfaces:

Serializable, UjoCloneable, UjoLockable, UjoTextable, ColumnWrapper, Ujo

public final class MetaColumn
extends MetaRelation2Many
implements ColumnWrapper

Database column meta-data

See Also:

Serialized Form

Field Summary

static String	AUTO_INDEX_NAME A constant for an auto index name
static Key<MetaColumn,String>	COMMENT Comment of the database column
static Key<MetaColumn,String>	CONSTRAINT_NAME A name of the constraint for the case a foreign key
static Key<MetaColumn,Class<? extends ITypeService>>	CONVERTER Convert, save and read application data from/to the database
static Key<MetaColumn,DbType>	DB_TYPE Database Type
static Key<MetaColumn,String>	DEFAULT_VALUE DB Default value
static Key<MetaColumn,String>	INDEX A name of the non-unique database index for the column, where the same index can contain more columns.
static Key<MetaColumn,Boolean>	MANDATORY Column NOT-NULL
static Key<MetaColumn,Integer>	MAX_LENGTH Column value length
static Key<MetaColumn,Integer>	PRECISION Column value precision
static Key<MetaColumn,Boolean>	PRIMARY_KEY DB primary key
static Key<MetaColumn,String>	UNIQUE_INDEX A name of the unique database index for the column, where the same index can contain more columns.

Fields inherited from class org.ujorm.orm.metaModel.MetaRelation2Many

ID, NAME, TABLE, TABLE_KEY

Constructor Summary

MetaColumn()

MetaColumn(ITypeService converter)

MetaColumn(MetaTable table, Key tableProperty, MetaColumn param)

Method Summary

ColumnWrapper	addTableAlias(String alias) Create new object column for the new alias
String	getColumnAlias() Returns a full SQL column alias name by sample: "TABLE_ALIAS"."ORIG_COLUMN"
String	getComment() Get a Comment from meta-model annotation.
String	getConstraintName() Returns a constraint name for case a foreigh key
ITypeService	getConverter() Returna not null converter
Class	getDbTypeClass() Returns a native database code for a DDL statements
Class	getDialectClass() Returns a SQL dialect class from a related Database
String	getDialectName() Returns a SQL dialect class from a related Database
String	getForeignColumnName(int index) Returns a name of foreign column by index
List<MetaColumn>	getForeignColumns() Returns an original foreign columns in case a foreign column.
MetaTable	getForeignTable() Returns an original foreign columns in case a foreign column.
String	getFullName() Returns a DB, TABLE and COLUMN name
Object	getJdbcFriendlyDefaultValue() Returns a default value in a JDBC friendly type.
int	getMaxLength() Returns a maximal db column length in the database.
MetaColumn	getModel() Get link to a column meta-model
String	getName() Returns a column name
int	getPrecision() Returns the db column precision.
Class	getType() Returns a Java Class of value
char	getTypeCode() A TypeCode
Object	getValue(OrmUjo bo) Returns a key value from a table
boolean	hasDefaultValue() Has the key a default value (not null) ? If the default value is an empty String than method returns false.
void	initTypeCode() Initialize a type code - for an internal use only.
boolean	isColumn() It is a DB column (either a value of a foreign key), not a relation to many.
boolean	isCommented() Has the instance assigned a non empty comment?
boolean	isForeignKey() Is it a Foreign Key ?
boolean	isMandatory() Returns true if the related db column is NOT NULL.
boolean	isPrimaryKey() Is it a Primary Key?
boolean	isVoid() Is the related key type void?
void	printForeignColumnFullName(int index, Appendable out) Print a full 'alias' name of foreign column by index
void	setValue(Ujo bo, Object value) Returns a key value from a table

Methods inherited from class org.ujorm.orm.metaModel.MetaRelation2Many

equals, getHandler, getKey, getTable, getTableAlias, getTableClass, getValue, hashCode, isCompositeKey, isTypeOf, toString

Methods inherited from class org.ujorm.orm.AbstractMetaModel

changeDefault, checkReadOnly, clearReadOnly, get, lock, readAuthorization, readOnly, setReadOnly, writeValue

Methods inherited from class org.ujorm.extensions.AbstractUjo

newCamelFactory, newFactory, readValue

Methods inherited from class org.ujorm.extensions.SuperAbstractUjo

clone, init, init, readKeys, readUjoManager, readValueString, writeValueString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.ujorm.orm.ColumnWrapper

equals, getKey, getTableAlias, isCompositeKey

Methods inherited from interface org.ujorm.Ujo

readKeys, readValue

Field Detail

AUTO_INDEX_NAME

public static final String AUTO_INDEX_NAME

A constant for an auto index name

See Also:

Constant Field Values

PRIMARY_KEY

public static final Key<MetaColumn,Boolean> PRIMARY_KEY

DB primary key

DB_TYPE

public static final Key<MetaColumn,DbType> DB_TYPE

Database Type

MANDATORY

public static final Key<MetaColumn,Boolean> MANDATORY

Column NOT-NULL

MAX_LENGTH

public static final Key<MetaColumn,Integer> MAX_LENGTH

Column value length

PRECISION

public static final Key<MetaColumn,Integer> PRECISION

Column value precision

DEFAULT_VALUE

public static final Key<MetaColumn,String> DEFAULT_VALUE

DB Default value

INDEX

public static final Key<MetaColumn,String> INDEX

A name of the non-unique database index for the column, where the same index can contain more columns. If the name is "AUTO" then automatic name based on column setting is generated. If a single column of the index is marked as unique, so the entire index will be unique.

UNIQUE_INDEX

public static final Key<MetaColumn,String> UNIQUE_INDEX

A name of the unique database index for the column, where the same index can contain more columns. If the name is "AUTO" then automatic name based on column setting is generated. If a single column of the index is marked as unique, so the entire index will be unique.

CONSTRAINT_NAME

public static final Key<MetaColumn,String> CONSTRAINT_NAME

A name of the constraint for the case a foreign key

CONVERTER

public static final Key<MetaColumn,Class<? extends ITypeService>> CONVERTER

Convert, save and read application data from/to the database

COMMENT

public static final Key<MetaColumn,String> COMMENT

Comment of the database column

Constructor Detail

MetaColumn

public MetaColumn()

MetaColumn

public MetaColumn(ITypeService converter)

MetaColumn

public MetaColumn(MetaTable table,
                  Key tableProperty,
                  MetaColumn param)

Method Detail

isColumn

public boolean isColumn()

It is a DB column (either a value of a foreign key), not a relation to many.

Overrides:

isColumn in class MetaRelation2Many

isForeignKey

public boolean isForeignKey()

Is it a Foreign Key ?

Overrides:

isForeignKey in class MetaRelation2Many

isPrimaryKey

public boolean isPrimaryKey()

Is it a Primary Key?

isCommented

public boolean isCommented()

Has the instance assigned a non empty comment?

getComment

public String getComment()

Get a Comment from meta-model annotation.

See Also:

Comment

getMaxLength

public int getMaxLength()

Returns a maximal db column length in the database.

Returns:

If key is undefined then the method returns value -1.

getPrecision

public int getPrecision()

Returns the db column precision.

Returns:

If key is undefined then the method returns value -1.

isMandatory

public boolean isMandatory()

Returns true if the related db column is NOT NULL.

getForeignTable

public MetaTable getForeignTable()

Returns an original foreign columns in case a foreign column.

getForeignColumns

public List<MetaColumn> getForeignColumns()

Returns an original foreign columns in case a foreign column.

getForeignColumnName

public String getForeignColumnName(int index)

Returns a name of foreign column by index

getValue

public Object getValue(OrmUjo bo)

Returns a key value from a table

setValue

public void setValue(Ujo bo,
                     Object value)

Returns a key value from a table

Parameters:

ujo - Related Ujo object

value - A value to assign.

getType

public Class getType()

Returns a Java Class of value

getName

public final String getName()

Returns a column name

Specified by:

getName in interface ColumnWrapper

getFullName

public String getFullName()

Returns a DB, TABLE and COLUMN name

getColumnAlias

public String getColumnAlias()

Returns a full SQL column alias name by sample: "TABLE_ALIAS"."ORIG_COLUMN"

printForeignColumnFullName

public void printForeignColumnFullName(int index,
                                       Appendable out)
                                throws IOException

Print a full 'alias' name of foreign column by index

Throws:

IOException

getTypeCode

public char getTypeCode()

A TypeCode

See Also:

TypeService

hasDefaultValue

public boolean hasDefaultValue()

Has the key a default value (not null) ? If the default value is an empty String than method returns false.

getJdbcFriendlyDefaultValue

public Object getJdbcFriendlyDefaultValue()

Returns a default value in a JDBC friendly type. The real result type depends in an implementatin of the ITypeService. For example a Java Enumerator default value can return either the Integer or String type too.

See Also:

ITypeService

getDialectClass

public Class getDialectClass()

Returns a SQL dialect class from a related Database

getDialectName

public String getDialectName()

Returns a SQL dialect class from a related Database

initTypeCode

public void initTypeCode()

Initialize a type code - for an internal use only.

isVoid

public boolean isVoid()

Is the related key type void?

getConstraintName

public String getConstraintName()

Returns a constraint name for case a foreigh key

getConverter

public ITypeService getConverter()

Returna not null converter

getDbTypeClass

public Class getDbTypeClass()

Returns a native database code for a DDL statements

getModel

public MetaColumn getModel()

Get link to a column meta-model

Specified by:

getModel in interface ColumnWrapper

addTableAlias

public final ColumnWrapper addTableAlias(String alias)

Create new object column for the new alias

Parameters:

alias - Nullable alias value

Returns:

New instance of ColumnWrapper for a different alias.