com.bigdata.rdf.sail.sparql

Class BigdataASTVisitorBase

java.lang.Object

com.bigdata.rdf.sail.sparql.ASTVisitorBase

com.bigdata.rdf.sail.sparql.BigdataASTVisitorBase

All Implemented Interfaces:

SyntaxTreeBuilderVisitor

Direct Known Subclasses:

ValueExprBuilder

public abstract class BigdataASTVisitorBase
extends ASTVisitorBase

Base class for AST visitor impls.

Author:

Bryan Thompson

Field Summary

Fields

Modifier and Type	Field and Description
protected BigdataASTContext	context

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BigdataASTVisitorBase(BigdataASTContext context)

Method Summary

Methods

Modifier and Type	Method and Description
protected int	depth(Node node) Return the depth of the node in the parse tree.
protected ASTGraphGraphPattern	firstASTGraphGraphAncestor(Node node) Returns the enclosing ASTGraphGraphPattern ancestor-or-self for the given node, or null if none exists.
protected static String	indent(int depth) Returns a string that may be used to indent a dump of the nodes in the tree.
protected String	indent(Node node) Return a white space string which may be used to indent the node to its depth in the parse tree.
protected com.bigdata.rdf.sail.sparql.GroupGraphPattern	scopedGroupGraphPattern(Node n) Builds a fresh GroupGraphPattern that inherits the scope for the given node.
Object	visit(ASTBlankNode node, Object data)
ConstantNode	visit(ASTFalse node, Object data)
ConstantNode	visit(ASTIRI node, Object data)
ConstantNode	visit(ASTNumericLiteral node, Object data)
Object	visit(ASTQName node, Object data)
ConstantNode	visit(ASTRDFLiteral node, Object data)
String	visit(ASTString node, Object data)
ConstantNode	visit(ASTTrue node, Object data)
VarNode	visit(ASTVar node, Object data) Note: openrdf uses the BlankNodeVarProcessor create anonymous variables from blank nodes and then flags those as anonymous variables in this step.

Methods inherited from class com.bigdata.rdf.sail.sparql.ASTVisitorBase

visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class java.lang.Object

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

Field Detail

context

protected final BigdataASTContext context

Constructor Detail

BigdataASTVisitorBase

protected BigdataASTVisitorBase(BigdataASTContext context)

Method Detail

depth

protected final int depth(Node node)

Return the depth of the node in the parse tree. The depth is ZERO (0) if the node does not have a parent.

Parameters:

node - The node.

Returns:

The depth of that node.

indent

protected final String indent(Node node)

Return a white space string which may be used to indent the node to its depth in the parse tree.

Parameters:

node - The node.

Returns:

The indent string.

indent

protected static String indent(int depth)

Returns a string that may be used to indent a dump of the nodes in the tree.

Parameters:

depth - The indentation depth.

Returns:

A string suitable for indent at that height.

visit

public final VarNode visit(ASTVar node,
            Object data)
                    throws VisitorException

Note: openrdf uses the BlankNodeVarProcessor create anonymous variables from blank nodes and then flags those as anonymous variables in this step.

Specified by:

visit in interface SyntaxTreeBuilderVisitor

Overrides:

visit in class ASTVisitorBase

Throws:

VisitorException

visit

public final Object visit(ASTQName node,
           Object data)
                   throws VisitorException

Specified by:

visit in interface SyntaxTreeBuilderVisitor

Overrides:

visit in class ASTVisitorBase

Throws:

VisitorException

visit

public final Object visit(ASTBlankNode node,
           Object data)
                   throws VisitorException

Specified by:

visit in interface SyntaxTreeBuilderVisitor

Overrides:

visit in class ASTVisitorBase

Throws:

VisitorException

visit

public final ConstantNode visit(ASTIRI node,
                 Object data)
                         throws VisitorException

Specified by:

visit in interface SyntaxTreeBuilderVisitor

Overrides:

visit in class ASTVisitorBase

Throws:

VisitorException

visit

public final ConstantNode visit(ASTRDFLiteral node,
                 Object data)
                         throws VisitorException

Specified by:

visit in interface SyntaxTreeBuilderVisitor

Overrides:

visit in class ASTVisitorBase

Throws:

VisitorException

visit

public final ConstantNode visit(ASTNumericLiteral node,
                 Object data)
                         throws VisitorException

Specified by:

visit in interface SyntaxTreeBuilderVisitor

Overrides:

visit in class ASTVisitorBase

Throws:

VisitorException

visit

public final ConstantNode visit(ASTTrue node,
                 Object data)
                         throws VisitorException

Specified by:

visit in interface SyntaxTreeBuilderVisitor

Overrides:

visit in class ASTVisitorBase

Throws:

VisitorException

visit

public final ConstantNode visit(ASTFalse node,
                 Object data)
                         throws VisitorException

Specified by:

visit in interface SyntaxTreeBuilderVisitor

Overrides:

visit in class ASTVisitorBase

Throws:

VisitorException

visit

public final String visit(ASTString node,
           Object data)
                   throws VisitorException

Specified by:

visit in interface SyntaxTreeBuilderVisitor

Overrides:

visit in class ASTVisitorBase

Throws:

VisitorException

scopedGroupGraphPattern

protected com.bigdata.rdf.sail.sparql.GroupGraphPattern scopedGroupGraphPattern(Node n)
                                                                         throws VisitorException

Builds a fresh GroupGraphPattern that inherits the scope for the given node. This is done by looking up the scope of the given node by following its ancestor chain, to identify whether the node has some named graph ancestors. If so, the scope from the enclosing named graph ancestor is copied over, otherwise we're in default context.

Parameters:

n -

Returns:

Throws:

VisitorException

firstASTGraphGraphAncestor

protected ASTGraphGraphPattern firstASTGraphGraphAncestor(Node node)

Returns the enclosing ASTGraphGraphPattern ancestor-or-self for the given node, or null if none exists.

Parameters:

node - node at which to start lookup

Returns:

first enclosing ASTGraphGraphPattern ancestor, if any, null otherwise