org.opendaylight.yangtools.yang.xpath.api

Interface YangXPathExpression

All Superinterfaces:

Immutable, MutationBehaviour<Immutable>

@Beta
public interface YangXPathExpression
extends Immutable

Method Summary

Modifier and Type	Method and Description
YangExpr	getRootExpr()
YangLocationPath	interpretAsInstanceIdentifier(YangLiteralExpr expr)
QName	interpretAsQName(YangLiteralExpr expr) Attempt to interpret a YangLiteralExpr referenced by this expression as a QName.

Method Detail

getRootExpr

YangExpr getRootExpr()

interpretAsQName

QName interpretAsQName(YangLiteralExpr expr)
                throws XPathExpressionException

Attempt to interpret a YangLiteralExpr referenced by this expression as a QName. This method is required to perform late value binding of the expression when the literal needs to be interpreted as a reference to an identity.

The syntax of expr is required to conform to XML QName format, as further restricted by YANG identityref Lexical Representation.

Unfortunately we do not know when a literal will need to be interpreted in this way, as that can only be known at evaluation.

Parameters:

expr - Literal to be reinterpreted

Returns:

QName representation of the literal

Throws:

XPathExpressionException - when the literal cannot be interpreted as a QName

interpretAsInstanceIdentifier

YangLocationPath interpretAsInstanceIdentifier(YangLiteralExpr expr)
                                        throws XPathExpressionException

Throws:

XPathExpressionException