saffron.rel
Class TypeFactoryImpl.CrossType

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

All Implemented Interfaces:

Type

Enclosing class:

TypeFactoryImpl

protected class TypeFactoryImpl.CrossType

extends TypeFactoryImpl.TypeImpl

Type of the cartesian product of two or more sets of records.

Its fields are those of its constituent records, but unlike a TypeFactoryImpl.RecordType, those fields' names are not necessarily distinct.

Field Summary

Type[]

types

Fields inherited from class saffron.rel.TypeFactoryImpl.TypeImpl

digest, fields

Constructor Summary

TypeFactoryImpl.CrossType(Type[] types)
Creates a cartesian product type.

Method Summary

protected String	computeDigest()
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.
boolean	isJoin() Whether the type represents a cartesian product of regular types.

Methods inherited from class saffron.rel.TypeFactoryImpl.TypeImpl

equals, getFactory, hashCode, isProject, toString

Methods inherited from class java.lang.Object

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

Field Detail

types

public final Type[] types

Constructor Detail

TypeFactoryImpl.CrossType

public TypeFactoryImpl.CrossType(Type[] types)

Creates a cartesian product type.

Pre-condition:

types != null, types.length >= 1, !(types[i] instanceof CrossType)

Method Detail

computeDigest

protected String computeDigest()

Specified by:

computeDigest in class TypeFactoryImpl.TypeImpl

getFieldCount

public int getFieldCount()

Description copied from interface: Type

Returns the number of columns.

Specified by:

getFieldCount in interface Type

Overrides:

getFieldCount in class TypeFactoryImpl.TypeImpl

getFields

public Field[] getFields()

Description copied from interface: Type

Returns the columns.

Specified by:

getFields in interface Type

Overrides:

getFields in class TypeFactoryImpl.TypeImpl

getFieldOrdinal

public int getFieldOrdinal(String fieldName)

Specified by:

getFieldOrdinal in interface Type

Overrides:

getFieldOrdinal in class TypeFactoryImpl.TypeImpl

getField

public Field getField(String fieldName)

Specified by:

getField in interface Type

Overrides:

getField in class TypeFactoryImpl.TypeImpl

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

Overrides:

isJoin in class TypeFactoryImpl.TypeImpl

getJoinTypes

public Type[] getJoinTypes()

Description copied from interface: Type

Returns the component types of a join type.

Specified by:

getJoinTypes in interface Type

Overrides:

getJoinTypes in class TypeFactoryImpl.TypeImpl