Module org.apache.jena.arq

Package org.apache.jena.sparql.expr

Class E_IRI2

java.lang.Object

org.apache.jena.sparql.expr.ExprNode

org.apache.jena.sparql.expr.ExprFunction

org.apache.jena.sparql.expr.ExprFunction2

org.apache.jena.sparql.expr.E_IRI2

All Implemented Interfaces:

Expr

Direct Known Subclasses:

E_URI2

public class E_IRI2
extends ExprFunction2

IRI(base, expr). Two argument SPARQL extension. The function URI(base, expr) is the same, but under a different name as a subclass.

As an ARQ extension, IRI(base, relative) resolves the relative URI (string or IRI) against the result of the "base" expression, which in turn is resolved as per the one-argument form.

Field Summary

Fields inherited from interface org.apache.jena.sparql.expr.Expr

CMP_EQUAL, CMP_GREATER, CMP_INDETERMINATE, CMP_LESS, CMP_UNEQUAL, NONE

Constructor Summary

Constructors

Constructor	Description
E_IRI2(Expr baseExpr, String parserBaseURI, Expr relExpr)

Method Summary

Modifier and Type	Method	Description
Expr	copy(Expr expr1, Expr expr2)
boolean	equals(Expr obj, boolean bySyntax)	General equality operation - consider this to be 'protected'
NodeValue	eval(NodeValue v1, NodeValue v2)
NodeValue	eval(NodeValue v1, NodeValue v2, FunctionEnv env)
Expr	getBaseExpr()
String	getFunctionPrintName(SerializationContext cxt)	Name used for output in SPARQL format needing functional form (no specific keyword).
String	getParserBase()	Get the parser base - the base URI a a string at the point in parsing when this object was created.
Expr	getRelExpr()	Expression for the relative URI.
int	hashCode()	Expr are used in both syntax and algebra.

Methods inherited from class org.apache.jena.sparql.expr.ExprFunction2

apply, applyNodeTransform, copySubstitute, eval, getArg, getArg1, getArg2, numArgs, visit

Methods inherited from class org.apache.jena.sparql.expr.ExprFunction

getArgs, getFunction, getFunctionIRI, getFunctionName, getFunctionSymbol, getOpName, isFunction

Methods inherited from class org.apache.jena.sparql.expr.ExprNode

asVar, deepCopy, equals, equalsBySyntax, getConstant, getExpr, getExprVar, getGraphPattern, getVarName, getVarsMentioned, isConstant, isExpr, isGraphPattern, isSatisfied, isVariable, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Details

E_IRI2

public E_IRI2(Expr baseExpr,
 String parserBaseURI,
 Expr relExpr)

Method Details

eval

public NodeValue eval(NodeValue v1,
 NodeValue v2,
 FunctionEnv env)

Overrides:

eval in class ExprFunction2

copy

public Expr copy(Expr expr1,
 Expr expr2)

Specified by:

copy in class ExprFunction2

eval

public NodeValue eval(NodeValue v1,
 NodeValue v2)

Specified by:

eval in class ExprFunction2

getFunctionPrintName

public String getFunctionPrintName(SerializationContext cxt)

Description copied from class: ExprFunction

Name used for output in SPARQL format needing functional form (no specific keyword). e.g. regexp(), custom functions, ...

Overrides:

getFunctionPrintName in class ExprFunction

getParserBase

public String getParserBase()

Get the parser base - the base URI a a string at the point in parsing when this object was created. If there is an explicit base expression (2 argument form), the parse base is used to make the base expression absolute.

This may be null - the object may not have been created by the parser.

getRelExpr

public Expr getRelExpr()

Expression for the relative URI. This is the argument to the one-argument form or the second argument for the two-argument form.

getBaseExpr

public Expr getBaseExpr()

hashCode

public int hashCode()

Description copied from interface: Expr

Expr are used in both syntax and algebra. There is no syntax to algebra translation step because the parser uses operator precedence to build the right evaluation structure directly.

The exceptions to this are the NOT EXISTS and EXISTS expressions which involve a query pattern. As a result there are different ways in syntax to produce the same algebra form.

Two Expr are considered equal if they are equal as algebra expressions. hashCode and equals must implement that.

There is also equalsBySyntax. Because two different syntax forms can yield the same algebra, but two different algebra forms must be different syntax, equalsBySyntax implies equals (by algebra).

Hence, different hashCode => not equalsBySyntax.

Specified by:

hashCode in interface Expr

Overrides:

hashCode in class ExprFunction2

equals

public boolean equals(Expr obj,
 boolean bySyntax)

Description copied from interface: Expr

General equality operation - consider this to be 'protected'

Specified by:

equals in interface Expr

Overrides:

equals in class ExprFunction