Class LogicalToPhysicalOpConverterImpl

java.lang.Object

se.liu.ida.hefquin.engine.queryplan.utils.LogicalToPhysicalOpConverterImpl

All Implemented Interfaces:

LogicalToPhysicalOpConverter

public class LogicalToPhysicalOpConverterImpl
extends Object
implements LogicalToPhysicalOpConverter

This class provides methods to convert logical operators into physical operators by using the respective default type of physical operator for each type of logical operator.

Constructor Summary

Constructors

Constructor	Description
LogicalToPhysicalOpConverterImpl(List<PhysicalOpFactory> popFactories)

Method Summary

Modifier and Type	Method	Description
BinaryPhysicalOp	convert(BinaryLogicalOp lop, ExpectedVariables inputVars1, ExpectedVariables inputVars2)	Returns a physical operator that implements the given logical operator under the assumption that this operator will be used in a plan in which the two subplans under this operator will produce solution mappings with the given variables, respectively.
NaryPhysicalOp	convert(NaryLogicalOp lop, ExpectedVariables... inputVars)	Returns a physical operator that implements the given logical operator under the assumption that this operator will be used in a plan in which the subplans under this operator will produce solution mappings with the given variables, respectively.
NullaryPhysicalOp	convert(NullaryLogicalOp lop)	Returns a physical operator that implements the given logical operator.
UnaryPhysicalOp	convert(UnaryLogicalOp lop, ExpectedVariables inputVars)	Returns a physical operator that implements the given logical operator under the assumption that this operator will be used in a plan in which the subplan under this operator will produce solution mappings with the given variables.
Set<BinaryPhysicalOp>	getAllPossible(BinaryLogicalOp lop, ExpectedVariables inputVars1, ExpectedVariables inputVars2)	Returns all physical operators that implement the given logical operator under the assumption that this operator will be used in a plan in which the two subplans under this operator will produce solution mappings with the given variables, respectively.
Set<NaryPhysicalOp>	getAllPossible(NaryLogicalOp lop, ExpectedVariables... inputVars)	Returns all physical operators that implement the given logical operator under the assumption that this operator will be used in a plan in which the subplans under this operator will produce solution mappings with the given variables, respectively.
Set<NullaryPhysicalOp>	getAllPossible(NullaryLogicalOp lop)	Returns all physical operators that implement the given logical operator.
Set<UnaryPhysicalOp>	getAllPossible(UnaryLogicalOp lop, ExpectedVariables inputVars)	Returns all physical operators that implement the given logical operator under the assumption that this operator will be used in a plan in which the subplan under this operator will produce solution mappings with the given variables.

Methods inherited from class java.lang.Object

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

Constructor Details

LogicalToPhysicalOpConverterImpl

public LogicalToPhysicalOpConverterImpl(List<PhysicalOpFactory> popFactories)

Method Details

convert

public NullaryPhysicalOp convert(NullaryLogicalOp lop)

Description copied from interface: LogicalToPhysicalOpConverter

Returns a physical operator that implements the given logical operator. If this converter knows of multiple types of physical operators that may be used for the given logical operator, then the default type is used. If this converter does not know of any type of physical operator that may be used for the given logical operator, then an UnsupportedOperationException is thrown.

Specified by:

convert in interface LogicalToPhysicalOpConverter

Parameters:

lop - - the logical operator to be converted

Returns:

a physical operator for the given logical operator

getAllPossible

public Set<NullaryPhysicalOp> getAllPossible(NullaryLogicalOp lop)

Description copied from interface: LogicalToPhysicalOpConverter

Returns all physical operators that implement the given logical operator.

Specified by:

getAllPossible in interface LogicalToPhysicalOpConverter

Parameters:

lop - - the logical operator to be converted

Returns:

a set of all possible physical operators for the given logical operator; the set may be empty

convert

public UnaryPhysicalOp convert(UnaryLogicalOp lop,
 ExpectedVariables inputVars)

Description copied from interface: LogicalToPhysicalOpConverter

Returns a physical operator that implements the given logical operator under the assumption that this operator will be used in a plan in which the subplan under this operator will produce solution mappings with the given variables.

If this converter knows of multiple types of physical operators that may be applied in this case, then the default type is used. If this converter does not know of any type of physical operator that may be applied in this case, then an UnsupportedOperationException is thrown.

Specified by:

convert in interface LogicalToPhysicalOpConverter

Parameters:

lop - - the logical operator to be converted

inputVars - - the variables that can be expected to be bound in solution mappings that the physical operator will have to process

Returns:

a physical operator for the given logical operator

getAllPossible

public Set<UnaryPhysicalOp> getAllPossible(UnaryLogicalOp lop,
 ExpectedVariables inputVars)

Description copied from interface: LogicalToPhysicalOpConverter

Returns all physical operators that implement the given logical operator under the assumption that this operator will be used in a plan in which the subplan under this operator will produce solution mappings with the given variables.

Specified by:

getAllPossible in interface LogicalToPhysicalOpConverter

Parameters:

lop - - the logical operator to be converted

inputVars - - the variables that can be expected to be bound in solution mappings that the physical operator will have to process

Returns:

a set of all possible physical operators for the given logical operator; the set may be empty

convert

public BinaryPhysicalOp convert(BinaryLogicalOp lop,
 ExpectedVariables inputVars1,
 ExpectedVariables inputVars2)

Description copied from interface: LogicalToPhysicalOpConverter

Returns a physical operator that implements the given logical operator under the assumption that this operator will be used in a plan in which the two subplans under this operator will produce solution mappings with the given variables, respectively.

If this converter knows of multiple types of physical operators that may be applied in this case, then the default type is used. If this converter does not know of any type of physical operator that may be applied in this case, then an UnsupportedOperationException is thrown.

Specified by:

convert in interface LogicalToPhysicalOpConverter

Parameters:

lop - - the logical operator to be converted

inputVars1 - - the variables that can be expected to be bound in solution mappings that the physical operator will have to process as its left input

inputVars2 - - the variables that can be expected to be bound in solution mappings that the physical operator will have to process as its right input

Returns:

a physical operator for the given logical operator

getAllPossible

public Set<BinaryPhysicalOp> getAllPossible(BinaryLogicalOp lop,
 ExpectedVariables inputVars1,
 ExpectedVariables inputVars2)

Description copied from interface: LogicalToPhysicalOpConverter

Returns all physical operators that implement the given logical operator under the assumption that this operator will be used in a plan in which the two subplans under this operator will produce solution mappings with the given variables, respectively.

Specified by:

getAllPossible in interface LogicalToPhysicalOpConverter

Parameters:

lop - - the logical operator to be converted

inputVars1 - - the variables that can be expected to be bound in solution mappings that the physical operator will have to process as its left input

inputVars2 - - the variables that can be expected to be bound in solution mappings that the physical operator will have to process as its right input

Returns:

a set of all possible physical operators for the given logical operator; the set may be empty

convert

public NaryPhysicalOp convert(NaryLogicalOp lop,
 ExpectedVariables... inputVars)

Description copied from interface: LogicalToPhysicalOpConverter

Returns a physical operator that implements the given logical operator under the assumption that this operator will be used in a plan in which the subplans under this operator will produce solution mappings with the given variables, respectively.

If this converter knows of multiple types of physical operators that may be applied in this case, then the default type is used. If this converter does not know of any type of physical operator that may be applied in this case, then an UnsupportedOperationException is thrown.

Specified by:

convert in interface LogicalToPhysicalOpConverter

Parameters:

lop - - the logical operator to be converted

inputVars - - the variables that can be expected to be bound in solution mappings that the physical operator will have to process for each of its inputs

Returns:

a physical operator for the given logical operator

getAllPossible

public Set<NaryPhysicalOp> getAllPossible(NaryLogicalOp lop,
 ExpectedVariables... inputVars)

Description copied from interface: LogicalToPhysicalOpConverter

Returns all physical operators that implement the given logical operator under the assumption that this operator will be used in a plan in which the subplans under this operator will produce solution mappings with the given variables, respectively.

Specified by:

getAllPossible in interface LogicalToPhysicalOpConverter

Parameters:

lop - - the logical operator to be converted

inputVars - - the variables that can be expected to be bound in solution mappings that the physical operator will have to process for each of its inputs

Returns:

a set of all possible physical operators for the given logical operator; the set may be empty