Class LogicalOpGPAdd

java.lang.Object

se.liu.ida.hefquin.engine.queryplan.logical.impl.BaseForLogicalOps

se.liu.ida.hefquin.engine.queryplan.logical.impl.LogicalOpGPAdd

All Implemented Interfaces:

QueryPlanOperator, LogicalOperator, UnaryLogicalOp

public class LogicalOpGPAdd
extends BaseForLogicalOps
implements UnaryLogicalOp

Field Summary

Fields

Modifier and Type	Field	Description
protected final FederationMember	fm
protected final Map<String,org.apache.jena.sparql.core.Var>	paramVars
protected final SPARQLGraphPattern	pattern
protected TriplePattern	tp
protected boolean	tpCheckDone

Fields inherited from class se.liu.ida.hefquin.engine.queryplan.logical.impl.BaseForLogicalOps

mayReduce

Constructor Summary

Constructors

Constructor	Description
LogicalOpGPAdd(FederationMember fm, SPARQLGraphPattern pattern, Map<String,org.apache.jena.sparql.core.Var> paramVars, boolean mayReduce)

Method Summary

Modifier and Type	Method	Description
boolean	containsTriplePatternOnly()	Returns true if the graph pattern of this operator is only a triple pattern.
boolean	equals(Object o)
ExpectedVariables	getExpectedVariables(ExpectedVariables... inputVars)	Returns the variables that can be expected in the solution mappings produced by this operator in the case that the input(s) to this operator contain solutions mappings with the given set(s) of variables.
FederationMember	getFederationMember()
Map<String,org.apache.jena.sparql.core.Var>	getParameterVariables()	Returns the (nonempty) list of variables that is a parameter of this gpAdd operator (if any).
SPARQLGraphPattern	getPattern()
TriplePattern	getTP()	Returns the graph pattern of this operator as a triple pattern if this pattern is only a triple pattern.
int	hashCode()
boolean	hasParameterVariables()	Returns true if this gpAdd operator has a (nonempty) list of variables as parameter.
String	toString()
void	visit(LogicalPlanVisitor visitor)

Methods inherited from class se.liu.ida.hefquin.engine.queryplan.logical.impl.BaseForLogicalOps

mayReduce

Methods inherited from class java.lang.Object

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

Methods inherited from interface se.liu.ida.hefquin.engine.queryplan.logical.LogicalOperator

mayReduce

Field Details

fm

protected final FederationMember fm

pattern

protected final SPARQLGraphPattern pattern

paramVars

protected final Map<String,org.apache.jena.sparql.core.Var> paramVars

tp

protected TriplePattern tp

tpCheckDone

protected boolean tpCheckDone

Constructor Details

LogicalOpGPAdd

public LogicalOpGPAdd(FederationMember fm,
 SPARQLGraphPattern pattern,
 Map<String,org.apache.jena.sparql.core.Var> paramVars,
 boolean mayReduce)

Method Details

getFederationMember

public FederationMember getFederationMember()

getPattern

public SPARQLGraphPattern getPattern()

hasParameterVariables

public boolean hasParameterVariables()

Returns true if this gpAdd operator has a (nonempty) list of variables as parameter. If so, getParameterVariables() can be used to access this parameter.

getParameterVariables

public Map<String,org.apache.jena.sparql.core.Var> getParameterVariables()

Returns the (nonempty) list of variables that is a parameter of this gpAdd operator (if any).

If this gpAdd operator does not have such a parameter, then an UnsupportedOperationException is thrown. You can use hasParameterVariables() to ask whether this gpAdd operator is this parameter.

containsTriplePatternOnly

public boolean containsTriplePatternOnly()

Returns true if the graph pattern of this operator is only a triple pattern.

getTP

public TriplePattern getTP()

Returns the graph pattern of this operator as a triple pattern if this pattern is only a triple pattern.

Before calling this function, use containsTriplePatternOnly() to check whether the pattern is indeed only a triple pattern.

If it is not, this method throws an UnsupportedOperationException.

getExpectedVariables

public ExpectedVariables getExpectedVariables(ExpectedVariables... inputVars)

Description copied from interface: QueryPlanOperator

Returns the variables that can be expected in the solution mappings produced by this operator in the case that the input(s) to this operator contain solutions mappings with the given set(s) of variables. The number of ExpectedVariables objects passed to this method must be in line with the degree of this operator (e.g., for a unary operator, exactly one such object must be passed).

Specified by:

getExpectedVariables in interface QueryPlanOperator

visit

public void visit(LogicalPlanVisitor visitor)

Specified by:

visit in interface LogicalOperator

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object