com.hp.hpl.jena.sparql.lang.rdql
Class Q_StringLangEqual

java.lang.Object
  com.hp.hpl.jena.sparql.lang.rdql.SimpleNode
      com.hp.hpl.jena.sparql.lang.rdql.Q_StringLangEqual

All Implemented Interfaces:

com.hp.hpl.jena.graph.query.Expression, com.hp.hpl.jena.graph.query.Valuator, Expr, ExprBoolean, ExprRDQL, PrintableRDQL, RDQL_Node

public class Q_StringLangEqual
extends SimpleNode
implements ExprRDQL, ExprBoolean

Nested Class Summary

Nested classes/interfaces inherited from interface com.hp.hpl.jena.graph.query.Expression

com.hp.hpl.jena.graph.query.Expression.Application, com.hp.hpl.jena.graph.query.Expression.Base, com.hp.hpl.jena.graph.query.Expression.BoolConstant, com.hp.hpl.jena.graph.query.Expression.Constant, com.hp.hpl.jena.graph.query.Expression.Fixed, com.hp.hpl.jena.graph.query.Expression.Util, com.hp.hpl.jena.graph.query.Expression.Valof, com.hp.hpl.jena.graph.query.Expression.Variable

Field Summary

Fields inherited from interface com.hp.hpl.jena.sparql.expr.Expr

CMP_EQUAL, CMP_GREATER, CMP_INDETERMINATE, CMP_LESS, CMP_UNEQUAL

Fields inherited from interface com.hp.hpl.jena.graph.query.Expression

FALSE, TRUE

Method Summary

Expr	applyNodeTransform(NodeTransform transform) Rewrite, applying a node->node transformation
int	argCount()
java.lang.String	asInfixString()
java.lang.String	asPrefixString()
Var	asVar() Convert to a Var variable.
Expr	copySubstitute(Binding binding) Deep copy with substitution
Expr	copySubstitute(Binding binding, boolean foldConstants)
Expr	deepCopy() Deep copy
NodeValue	eval(Binding binding, FunctionEnv env) Evaluate this expression against the binding
boolean	evalBool(com.hp.hpl.jena.graph.query.IndexValues iv) Answer the result of evaluating the constraint expression as a primitive boolean value; implements Expression.evalBool(*).
RDQL_NodeValue	evalNode(Query q, com.hp.hpl.jena.graph.query.IndexValues env) Answer the NodeValue result of evaluating the constraints relative to the query and with the specified environment.
java.lang.Object	evalObject(com.hp.hpl.jena.graph.query.IndexValues iv) Answer the result of evaluating the constraint expression; implements Expression.evalObject(*).
RDQL_NodeValue	evalRDQL(Query q, com.hp.hpl.jena.graph.query.IndexValues env)
void	format(IndentedWriter writer)
void	format(Query query, IndentedWriter writer)
com.hp.hpl.jena.graph.query.Expression	getArg(int i)
NodeValue	getConstant() NodeValue constant (returns null if not a constant)
ExprVar	getExprVar() Variable (or null)
java.lang.String	getFun()
ExprFunction	getFunction() Get the function (returns null if not a function)
java.lang.String	getName()
java.lang.Object	getValue()
java.lang.String	getVarName() Variable name (returns null if not a variable)
java.util.Set<java.lang.String>	getVarNamesMentioned()
java.util.Set<Var>	getVarsMentioned()
boolean	isApply()
boolean	isConstant() Answer whether this is a constant expression - false includes "don't know" No constant folding so "false" from an expression that evaluates to a constant
boolean	isFunction() Answer wether this is a function.
boolean	isSatisfied(Binding binding, FunctionEnv execCxt) Test whether a Constraint is satisfied, given a set of bindings Includes error propagtion and Effective Boolean Value rules.
boolean	isSatisfied(com.hp.hpl.jena.graph.query.IndexValues env)
boolean	isVariable() Answer whether this is a variable (in which case getVarName and getNodeVar can be called)
void	jjtClose() This method is called after all the child nodes have been added.
void	postParse2(Query q)
com.hp.hpl.jena.graph.query.Valuator	prepare(com.hp.hpl.jena.graph.query.VariableIndexes vi)
java.lang.String	toString()
void	varNamesMentioned(java.util.Collection<java.lang.String> acc)
void	varsMentioned(java.util.Collection<Var> acc)
void	visit(ExprVisitor visitor)

Methods inherited from class com.hp.hpl.jena.sparql.lang.rdql.SimpleNode

dump, jjtAddChild, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, postParse1, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.hp.hpl.jena.sparql.expr.Expr

applyNodeTransform, asVar, copySubstitute, copySubstitute, deepCopy, eval, getConstant, getExprVar, getFunction, getVarName, getVarsMentioned, isConstant, isFunction, isSatisfied, isVariable, varsMentioned, visit

Method Detail

evalRDQL

public RDQL_NodeValue evalRDQL(Query q,
                               com.hp.hpl.jena.graph.query.IndexValues env)

Specified by:

evalRDQL in interface ExprRDQL

jjtClose

public void jjtClose()

Description copied from interface: RDQL_Node

This method is called after all the child nodes have been added.

Specified by:

jjtClose in interface RDQL_Node

Overrides:

jjtClose in class SimpleNode

isApply

public boolean isApply()

Specified by:

isApply in interface com.hp.hpl.jena.graph.query.Expression

getFun

public java.lang.String getFun()

Specified by:

getFun in interface com.hp.hpl.jena.graph.query.Expression

argCount

public int argCount()

Specified by:

argCount in interface com.hp.hpl.jena.graph.query.Expression

getArg

public com.hp.hpl.jena.graph.query.Expression getArg(int i)

Specified by:

getArg in interface com.hp.hpl.jena.graph.query.Expression

asInfixString

public java.lang.String asInfixString()

Specified by:

asInfixString in interface PrintableRDQL

asPrefixString

public java.lang.String asPrefixString()

Specified by:

asPrefixString in interface PrintableRDQL

toString

public java.lang.String toString()

format

public void format(IndentedWriter writer)

Specified by:

format in interface PrintableRDQL

copySubstitute

public Expr copySubstitute(Binding binding)

Description copied from interface: Expr

Deep copy with substitution

Specified by:

copySubstitute in interface Expr

copySubstitute

public Expr copySubstitute(Binding binding,
                           boolean foldConstants)

Specified by:

copySubstitute in interface Expr

applyNodeTransform

public Expr applyNodeTransform(NodeTransform transform)

Description copied from interface: Expr

Rewrite, applying a node->node transformation

Specified by:

applyNodeTransform in interface Expr

deepCopy

public Expr deepCopy()

Description copied from interface: Expr

Deep copy

Specified by:

deepCopy in interface Expr

eval

public NodeValue eval(Binding binding,
                      FunctionEnv env)

Description copied from interface: Expr

Evaluate this expression against the binding

Specified by:

eval in interface Expr

getConstant

public NodeValue getConstant()

Description copied from interface: Expr

NodeValue constant (returns null if not a constant)

Specified by:

getConstant in interface Expr

getExprVar

public ExprVar getExprVar()

Description copied from interface: Expr

Variable (or null)

Specified by:

getExprVar in interface Expr

getVarName

public java.lang.String getVarName()

Description copied from interface: Expr

Variable name (returns null if not a variable)

Specified by:

getVarName in interface Expr

asVar

public Var asVar()

Description copied from interface: Expr

Convert to a Var variable.

Specified by:

asVar in interface Expr

visit

public void visit(ExprVisitor visitor)

Specified by:

visit in interface Expr

isSatisfied

public boolean isSatisfied(Binding binding,
                           FunctionEnv execCxt)

Description copied from interface: Expr

Test whether a Constraint is satisfied, given a set of bindings Includes error propagtion and Effective Boolean Value rules.

Specified by:

isSatisfied in interface Expr

Parameters:

binding - The bindings

execCxt - FunctionEnv

Returns:

true or false

isSatisfied

public boolean isSatisfied(com.hp.hpl.jena.graph.query.IndexValues env)

postParse2

public void postParse2(Query q)

Overrides:

postParse2 in class SimpleNode

getVarsMentioned

public java.util.Set<Var> getVarsMentioned()

Specified by:

getVarsMentioned in interface Expr

getVarNamesMentioned

public java.util.Set<java.lang.String> getVarNamesMentioned()

varNamesMentioned

public void varNamesMentioned(java.util.Collection<java.lang.String> acc)

varsMentioned

public void varsMentioned(java.util.Collection<Var> acc)

Specified by:

varsMentioned in interface Expr

prepare

public com.hp.hpl.jena.graph.query.Valuator prepare(com.hp.hpl.jena.graph.query.VariableIndexes vi)

Specified by:

prepare in interface com.hp.hpl.jena.graph.query.Expression

evalObject

public java.lang.Object evalObject(com.hp.hpl.jena.graph.query.IndexValues iv)

Answer the result of evaluating the constraint expression; implements Expression.evalObject(*).

Specified by:

evalObject in interface com.hp.hpl.jena.graph.query.Valuator

evalBool

public boolean evalBool(com.hp.hpl.jena.graph.query.IndexValues iv)

Answer the result of evaluating the constraint expression as a primitive boolean value; implements Expression.evalBool(*).

Specified by:

evalBool in interface com.hp.hpl.jena.graph.query.Valuator

evalNode

public RDQL_NodeValue evalNode(Query q,
                               com.hp.hpl.jena.graph.query.IndexValues env)

Answer the NodeValue result of evaluating the constraints relative to the query and with the specified environment. Traps and handles exceptions. This code used to be in isSatisfied() until Expressions gained evalObject(), then it was factored out so that it could be shared by both evalXXX() methods.

isVariable

public boolean isVariable()

Description copied from interface: Expr

Answer whether this is a variable (in which case getVarName and getNodeVar can be called)

Specified by:

isVariable in interface com.hp.hpl.jena.graph.query.Expression

Specified by:

isVariable in interface Expr

getName

public java.lang.String getName()

Specified by:

getName in interface com.hp.hpl.jena.graph.query.Expression

isConstant

public boolean isConstant()

Description copied from interface: Expr

Answer whether this is a constant expression - false includes "don't know" No constant folding so "false" from an expression that evaluates to a constant

Specified by:

isConstant in interface com.hp.hpl.jena.graph.query.Expression

Specified by:

isConstant in interface Expr

getValue

public java.lang.Object getValue()

Specified by:

getValue in interface com.hp.hpl.jena.graph.query.Expression

isFunction

public boolean isFunction()

Description copied from interface: Expr

Answer wether this is a function.

Specified by:

isFunction in interface Expr

getFunction

public ExprFunction getFunction()

Description copied from interface: Expr

Get the function (returns null if not a function)

Specified by:

getFunction in interface Expr

format

public void format(Query query,
                   IndentedWriter writer)