Class VarUtils

java.lang.Object

org.eclipse.rdf4j.queryrender.sparql.util.VarUtils

public final class VarUtils
extends Object

Shared helpers for RDF4J Var comparison and path-var recognition.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ANON_PATH_INVERSE_PREFIX
static final String	ANON_PATH_PREFIX

Method Summary

Modifier and Type	Method	Description
static boolean	isAnonPathInverseVar(Var v)	True when the anonymous path var explicitly encodes inverse orientation under the same safety check.
static boolean	isAnonPathVar(Var v)	True iff the var looks like a parser-generated anonymous path bridge variable: has the reserved prefix *and* is marked anonymous or as a variable-scope change.
static boolean	sameVar(Var a, Var b)	true if both are unbound vars with equal names.
static boolean	sameVarOrValue(Var a, Var b)	True when both variables denote the same term: compares names if both are variables without value, or compares values if both are constants.

Methods inherited from class Object

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

Field Details

ANON_PATH_PREFIX

public static final String ANON_PATH_PREFIX

See Also:

• Constant Field Values

ANON_PATH_INVERSE_PREFIX

public static final String ANON_PATH_INVERSE_PREFIX

See Also:

• Constant Field Values

Method Details

sameVar

public static boolean sameVar(Var a,
 Var b)

true if both are unbound vars with equal names.

sameVarOrValue

public static boolean sameVarOrValue(Var a,
 Var b)

True when both variables denote the same term: compares names if both are variables without value, or compares values if both are constants. Returns false when one has a value and the other does not.

isAnonPathVar

public static boolean isAnonPathVar(Var v)

True iff the var looks like a parser-generated anonymous path bridge variable: has the reserved prefix *and* is marked anonymous or as a variable-scope change. This guards against user-supplied vars that merely reuse the prefix.

isAnonPathInverseVar

public static boolean isAnonPathInverseVar(Var v)

True when the anonymous path var explicitly encodes inverse orientation under the same safety check.