saffron.rel
Class TypeFactoryImpl.TypeImpl

java.lang.Object
  |
  +--saffron.rel.TypeFactoryImpl.TypeImpl

All Implemented Interfaces:

Type

Direct Known Subclasses:

OJTypeFactoryImpl.OJScalarType, TypeFactoryImpl.CrossType, TypeFactoryImpl.RecordType, TypeFactoryImpl.ScalarType

Enclosing class:

TypeFactoryImpl

protected abstract class TypeFactoryImpl.TypeImpl

extends Object

implements Type

Abstract implementation for Type. Useful if the type contains a set of fields.

Identity is based upon the digest field, which each derived class should set during construction.

Field Summary

protected String	digest
protected Field[]	fields

Constructor Summary

protected

TypeFactoryImpl.TypeImpl(Field[] fields)

Method Summary

protected abstract String	computeDigest()
boolean	equals(Object obj)
TypeFactory	getFactory()
Field	getField(String fieldName)
int	getFieldCount() Returns the number of columns.
int	getFieldOrdinal(String fieldName)
Field[]	getFields() Returns the columns.
Type[]	getJoinTypes() Returns the component types of a join type.
int	hashCode()
boolean	isJoin() Whether the type represents a cartesian product of regular types.
boolean	isProject()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

fields

protected final Field[] fields

digest

protected String digest

Constructor Detail

TypeFactoryImpl.TypeImpl

protected TypeFactoryImpl.TypeImpl(Field[] fields)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

computeDigest

protected abstract String computeDigest()

getFieldCount

public int getFieldCount()

Description copied from interface: Type

Returns the number of columns.

Specified by:

getFieldCount in interface Type

getFields

public Field[] getFields()

Description copied from interface: Type

Returns the columns.

Specified by:

getFields in interface Type

getFieldOrdinal

public int getFieldOrdinal(String fieldName)

Specified by:

getFieldOrdinal in interface Type

getField

public Field getField(String fieldName)

Specified by:

getField in interface Type

getFactory

public TypeFactory getFactory()

Specified by:

getFactory in interface Type

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

isJoin

public boolean isJoin()

Description copied from interface: Type

Whether the type represents a cartesian product of regular types.

Specified by:

isJoin in interface Type

getJoinTypes

public Type[] getJoinTypes()

Description copied from interface: Type

Returns the component types of a join type.

Specified by:

getJoinTypes in interface Type

isProject

public boolean isProject()

Specified by:

isProject in interface Type