Package se.liu.ida.hefquin.engine.wrappers.lpg.query

Interface CypherExpression

All Known Subinterfaces:

BooleanCypherExpression, ListCypherExpression, MatchClause, UnwindIterator

All Known Implementing Classes:

AliasedExpression, AllLabelsExpression, CountLargerThanZeroExpression, CypherVar, EdgeMatchClause, EqualityExpression, EXISTSExpression, FirstLabelExpression, GetItemExpression, KeysExpression, LiteralExpression, MarkerExpression, MembershipExpression, NodeMatchClause, PathMatchClause, PropertyAccessExpression, PropertyAccessWithVarExpression, TripleMapExpression, TypeExpression, UnwindIteratorImpl, VariableIDExpression, VariableLabelExpression

public interface CypherExpression

This interface represents a generic Cypher Expression. As per the grammar defining expressions in Figure 4 here: https://arxiv.org/pdf/1802.09984.pdf Thus, a variable, a function call, accessing a property value, etc. are Cypher expressions

Method Summary

Modifier and Type	Method	Description
Set<CypherVar>	getVars()	Returns a list of the [global] Cypher Variables used within the expression
void	visit(CypherExpressionVisitor visitor)	accepts a CypherExpressionVisitor and propagates the visit recursively when required.

Method Details

getVars

Set<CypherVar> getVars()

Returns a list of the [global] Cypher Variables used within the expression

visit

void visit(CypherExpressionVisitor visitor)

accepts a CypherExpressionVisitor and propagates the visit recursively when required.