net.ontopia.persistence.query.sql

Class SQLPrimitive

java.lang.Object

net.ontopia.persistence.query.sql.SQLPrimitive

All Implemented Interfaces:

SQLValueIF

public class SQLPrimitive
extends Object
implements SQLValueIF

INTERNAL: SQL value: primitive. Represents a primitive value of one of the standard SQL types. A primitive always has an arity of 1.

Warning: Null should be represented using the SQLNull class.

See Also:

Types

Field Summary

Fields

Modifier and Type	Field and Description
protected String	alias
protected FieldHandlerIF	fhandler
protected int	sql_type
protected Object	value
protected Class	vtype

Fields inherited from interface net.ontopia.persistence.query.sql.SQLValueIF

COLUMNS, FUNCTION, NULL, PARAMETER, PRIMITIVE, TUPLE, VERBATIM

Constructor Summary

Constructors

Constructor and Description
SQLPrimitive(Object value, int sql_type)

Method Summary

Modifier and Type	Method and Description
String	getAlias() INTERNAL: The column alias to use if this value is included in the projection.
int	getArity() INTERNAL: Returns the [column] arity of the value.
FieldHandlerIF	getFieldHandler() INTERNAL: Returns the field handler for the columns.
SQLValueIF	getReference() INTERNAL: Returns the referenced value if one exists.
int	getSQLType()
int	getType() INTERNAL: Returns the value class type.
Object	getValue()
int	getValueArity() INTERNAL: Returns the value arity of the value.
Class	getValueType() INTERNAL: Returns the value type.
boolean	isReference() INTERNAL: Returns true if this value is a reference to another.
void	setAlias(String alias) INTERNAL: Sets the column alias.
void	setFieldHandler(FieldHandlerIF fhandler) INTERNAL: Sets the field handler for the value.
void	setValueType(Class vtype) INTERNAL: Sets the value type.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

value

protected Object value

sql_type

protected int sql_type

alias

protected String alias

vtype

protected Class vtype

fhandler

protected FieldHandlerIF fhandler

Constructor Detail

SQLPrimitive

public SQLPrimitive(Object value,
                    int sql_type)

Method Detail

getType

public int getType()

Description copied from interface: SQLValueIF

INTERNAL: Returns the value class type. The type is represented by one of the constants in the SQLValueIF interface.

Specified by:

getType in interface SQLValueIF

getArity

public int getArity()

Description copied from interface: SQLValueIF

INTERNAL: Returns the [column] arity of the value. The number represents the number of "columns" the value spans, i.e. its composite width.

Specified by:

getArity in interface SQLValueIF

getValueArity

public int getValueArity()

Description copied from interface: SQLValueIF

INTERNAL: Returns the value arity of the value. This number refers to the number of nested values this value contains including itself. Most values therefore have a value arity of 1. Nested values may have an arity higher than 1. SQLTuple is currently the only nested value type.

Specified by:

getValueArity in interface SQLValueIF

getAlias

public String getAlias()

Description copied from interface: SQLValueIF

INTERNAL: The column alias to use if this value is included in the projection. The SQL select syntax is typically like "select value as from foo".

Specified by:

getAlias in interface SQLValueIF

setAlias

public void setAlias(String alias)

Description copied from interface: SQLValueIF

INTERNAL: Sets the column alias.

Specified by:

setAlias in interface SQLValueIF

isReference

public boolean isReference()

Description copied from interface: SQLValueIF

INTERNAL: Returns true if this value is a reference to another.

Specified by:

isReference in interface SQLValueIF

getReference

public SQLValueIF getReference()

Description copied from interface: SQLValueIF

INTERNAL: Returns the referenced value if one exists.

Specified by:

getReference in interface SQLValueIF

getSQLType

public int getSQLType()

getValue

public Object getValue()

getValueType

public Class getValueType()

Description copied from interface: SQLValueIF

INTERNAL: Returns the value type.

Specified by:

getValueType in interface SQLValueIF

setValueType

public void setValueType(Class vtype)

Description copied from interface: SQLValueIF

INTERNAL: Sets the value type.

Specified by:

setValueType in interface SQLValueIF

getFieldHandler

public FieldHandlerIF getFieldHandler()

Description copied from interface: SQLValueIF

INTERNAL: Returns the field handler for the columns.

Specified by:

getFieldHandler in interface SQLValueIF

setFieldHandler

public void setFieldHandler(FieldHandlerIF fhandler)

Description copied from interface: SQLValueIF

INTERNAL: Sets the field handler for the value.

Specified by:

setFieldHandler in interface SQLValueIF

toString

public String toString()

Overrides:

toString in class Object