be.SIRAPRISE.typeimplementations

Class UNPACK_RELATION

java.lang.Object

be.SIRAPRISE.typeimplementations.UNPACK_RELATION

All Implemented Interfaces:

OperatorImplementation_V0104, OperatorImplementation_V0105, java.io.Externalizable, java.io.Serializable

public final class UNPACK_RELATION
extends java.lang.Object
implements OperatorImplementation_V0105

The relation UNPACK operator takes a single argument.

Author:

Erwin

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
UNPACK_RELATION(Heading heading, MyReadOnlyLinkedHashMap<NameIdentifier,java.util.Map<java.lang.String,OperatorImplementation_V0104>> intervalTypedAttributesIntervalOperatorImplementations, MyReadOnlyMap<NameIdentifier,IntervalTypeImplementation> intervalTypedAttributesIntervalTypeImplementations) Creates the UNPACK_RELATION_RELATION

Method Summary

Modifier and Type	Method and Description
static java.util.Set<TupleBuffer>	computeUnpack(java.util.Collection<TupleBuffer> r1, MyReadOnlyLinkedHashMap<NameIdentifier,java.util.Map<java.lang.String,OperatorImplementation_V0104>> intervalTypedAttributesIntervalOperatorImplementations, MyReadOnlyMap<NameIdentifier,IntervalTypeImplementation> intervalTypeImplementations) The most stupid way conceivable to compute a relation union of relations that have no interval-typed attributes
static RelationBuffer	computeUnpack(RelationBuffer relationBuffer, MyReadOnlyLinkedHashMap<NameIdentifier,java.util.Map<java.lang.String,OperatorImplementation_V0104>> intervalTypedAttributesIntervalOperatorImplementations, MyReadOnlyMap<NameIdentifier,IntervalTypeImplementation> typeImplementationsMap)
ValueBuffer	executeOperator(java.util.LinkedList<ValueBuffer> args) Performs the actual logic of the operator.
java.lang.String[]	getArgumentTypeNames() Gets the list of names of types of the needed argument values
TypeDeclaration	getReturnTypeDeclaration() Gets the full type declaration of the type of the return value.
java.lang.String	getReturnTypeName() Gets the name of the type of the return value
java.lang.String	getSignature() Gets the name of the operator implemented by this implementation object
boolean	isDeterministic() Tells whether the operator is deterministic with respect to the arguments of its invocations.
void	readExternal(java.io.ObjectInput in)
static java.util.Set<MyReadOnlyMap<NameIdentifier,ValueBuffer>>	unpackTuple(TupleBuffer t, MyReadOnlyMap<NameIdentifier,IntervalTypeImplementation> intervalTypeImplementations, MyReadOnlyLinkedHashMap<NameIdentifier,java.util.Map<java.lang.String,OperatorImplementation_V0104>> intervalTypedAttributesIntervalOperatorImplementations)
static UNPACKInvocationResultDetails	validateExpressionDetails(Heading inputHeading, java.util.Set<NameIdentifier> unpackAttributeNames, java.lang.String inputPredicate)
static UNPACKInvocationResultDetails	validateExpressionDetails(Heading inputHeading, java.util.Set<NameIdentifier> unpackAttributeNames, java.lang.String inputPredicate, java.util.Collection<? extends KeyDef> inputKeySpecifications)
void	writeExternal(java.io.ObjectOutput out)

Methods inherited from class java.lang.Object

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

Constructor Detail

UNPACK_RELATION

public UNPACK_RELATION(Heading heading,
                       MyReadOnlyLinkedHashMap<NameIdentifier,java.util.Map<java.lang.String,OperatorImplementation_V0104>> intervalTypedAttributesIntervalOperatorImplementations,
                       MyReadOnlyMap<NameIdentifier,IntervalTypeImplementation> intervalTypedAttributesIntervalTypeImplementations)

Creates the UNPACK_RELATION_RELATION

Parameters:

heading - the heading that the UNPACK arguments conform to

intervalTypedAttributesIntervalOperatorImplementations - A map mapping the attribute names to a corresponding collection of interval operators (this collection takes itself the form of a mapping from operator names to interval operator implementations). The map is required to hold at least the OPERATORNAMES.SPLITBY, OPERATORNAMES.IMINUS, OPERATORNAMES.IINTERSECT and OPERATORNAMES.ISEMPTYINTERVAL implementations for each attribute.

intervalTypedAttributesIntervalTypeImplementations - A map mapping the interval-typed attribute names to their type implementations. The keySet() of this map must be equal to the keySet() of the intervalTypedAttributesIntervalOperatorImplementations Map.

Method Detail

computeUnpack

public static java.util.Set<TupleBuffer> computeUnpack(java.util.Collection<TupleBuffer> r1,
                                                       MyReadOnlyLinkedHashMap<NameIdentifier,java.util.Map<java.lang.String,OperatorImplementation_V0104>> intervalTypedAttributesIntervalOperatorImplementations,
                                                       MyReadOnlyMap<NameIdentifier,IntervalTypeImplementation> intervalTypeImplementations)

The most stupid way conceivable to compute a relation union of relations that have no interval-typed attributes

Parameters:

r1 - The first argument

intervalTypedAttributesIntervalOperatorImplementations - the applicable interval operator implementations per attribute to be unpacked

intervalTypeImplementations - the applicable interval type implementations per attribute to be unpacked

Returns:

The computed unpack

computeUnpack

public static RelationBuffer computeUnpack(RelationBuffer relationBuffer,
                                           MyReadOnlyLinkedHashMap<NameIdentifier,java.util.Map<java.lang.String,OperatorImplementation_V0104>> intervalTypedAttributesIntervalOperatorImplementations,
                                           MyReadOnlyMap<NameIdentifier,IntervalTypeImplementation> typeImplementationsMap)

Parameters:

relationBuffer - The buffer holding the relation to be unpacked

intervalTypedAttributesIntervalOperatorImplementations - The map of applicable operators per unpack attribute

typeImplementationsMap - The map of applicable type implementations per attribute to be unpacked

Returns:

the result of unpacking the given relation over the specified interval-typed attributes

unpackTuple

public static java.util.Set<MyReadOnlyMap<NameIdentifier,ValueBuffer>> unpackTuple(TupleBuffer t,
                                                                                   MyReadOnlyMap<NameIdentifier,IntervalTypeImplementation> intervalTypeImplementations,
                                                                                   MyReadOnlyLinkedHashMap<NameIdentifier,java.util.Map<java.lang.String,OperatorImplementation_V0104>> intervalTypedAttributesIntervalOperatorImplementations)

Parameters:

t - A tuple with interval-type attributes to be unpacked to point values

intervalTypeImplementations - the applicable interval type implementations per attribute to be unpacked

intervalTypedAttributesIntervalOperatorImplementations - the applicable interval operator implementations per attribute to be unpacked

Returns:

The set of attribute value maps that represents the input tuple unpacked over the specified unpack attributes

validateExpressionDetails

public static UNPACKInvocationResultDetails validateExpressionDetails(Heading inputHeading,
                                                                      java.util.Set<NameIdentifier> unpackAttributeNames,
                                                                      java.lang.String inputPredicate)
                                                               throws NonExistingAttributeException,
                                                                      AttributeNotIntervalTypedException,
                                                                      TypeIsNotOrdinalException

Parameters:

inputHeading - the heading of the relation subjected to an UNPACK.

unpackAttributeNames - the set of attribute names to UNPACK over.

inputPredicate - The predicate of which the input is the extension.

Returns:

An object holding information about the operator invocation

Throws:

NonExistingAttributeException - if an unpack attribute is specified that is not present in the input

AttributeNotIntervalTypedException - if an unpack attribute is specified that is not interval-typed

TypeIsNotOrdinalException - If the unpack attribute is of an interval type that is not based on an ordinal base type

validateExpressionDetails

public static UNPACKInvocationResultDetails validateExpressionDetails(Heading inputHeading,
                                                                      java.util.Set<NameIdentifier> unpackAttributeNames,
                                                                      java.lang.String inputPredicate,
                                                                      java.util.Collection<? extends KeyDef> inputKeySpecifications)
                                                               throws NonExistingAttributeException,
                                                                      AttributeNotIntervalTypedException,
                                                                      TypeIsNotOrdinalException

Parameters:

inputHeading - the heading of the relation subjected to an UNPACK.

unpackAttributeNames - the set of attribute names to UNPACK over.

inputPredicate - The predicate of which the input is the extension.

inputKeySpecifications - The key specifications that the input is known to satisfy.

Returns:

An object holding information about the operator invocation

Throws:

NonExistingAttributeException - if an unpack attribute is specified that is not present in the input

AttributeNotIntervalTypedException - if an unpack attribute is specified that is not interval-typed

TypeIsNotOrdinalException - If the unpack attribute is of an interval type that is not based on an ordinal base type

executeOperator

public ValueBuffer executeOperator(java.util.LinkedList<ValueBuffer> args)

Description copied from interface: OperatorImplementation_V0104

Performs the actual logic of the operator.

Specified by:

executeOperator in interface OperatorImplementation_V0104

Parameters:

args - the argument list. The list must hold as many ValueBuffer objects as there are arguments to the operator, and each ValueBuffer object holds a value for some argument to the operator. ValueBuffer objects on the list must appear in the same order as the operator argument declarations. Implementations have the option, but are not required, to do a check the conformance of the argument list (the argument count, notably) to the operator signature.

Returns:

A ValueBuffer object holding the result value of the operator execution in internal format.

getArgumentTypeNames

public java.lang.String[] getArgumentTypeNames()

Description copied from interface: OperatorImplementation_V0104

Gets the list of names of types of the needed argument values

Specified by:

getArgumentTypeNames in interface OperatorImplementation_V0104

Returns:

The names of the argument types

getReturnTypeDeclaration

public TypeDeclaration getReturnTypeDeclaration()

Description copied from interface: OperatorImplementation_V0105

Gets the full type declaration of the type of the return value. Differs from the _V0104 getReturnTypeName() in that for nonscalar return types, this method also returns the heading, not just only the RELATION or TUPLE typename.

Specified by:

getReturnTypeDeclaration in interface OperatorImplementation_V0105

Returns:

the full type declaration of the type of the return value

getReturnTypeName

public java.lang.String getReturnTypeName()

Description copied from interface: OperatorImplementation_V0104

Gets the name of the type of the return value

Specified by:

getReturnTypeName in interface OperatorImplementation_V0104

Returns:

the name of the type of the return value

getSignature

public java.lang.String getSignature()

Description copied from interface: OperatorImplementation_V0104

Gets the name of the operator implemented by this implementation object

Specified by:

getSignature in interface OperatorImplementation_V0104

Returns:

the name of the operator implemented by this implementation object

isDeterministic

public boolean isDeterministic()

Description copied from interface: OperatorImplementation_V0104

Tells whether the operator is deterministic with respect to the arguments of its invocations. An operator is deterministic if and only if for any two distinct invocations, if all the argument values are the same, then the result value returned will also be the same. An example of a nondeterministic operators is RANDOM().

Specified by:

isDeterministic in interface OperatorImplementation_V0104

Returns:

true if the operator is deterministic.

readExternal

public void readExternal(java.io.ObjectInput in)

Specified by:

readExternal in interface java.io.Externalizable

writeExternal

public void writeExternal(java.io.ObjectOutput out)

Specified by:

writeExternal in interface java.io.Externalizable