| java.lang.Object
 com.hp.hpl.jena.graph.query.Element
All known Subclasses: com.hp.hpl.jena.graph.query.Bind, com.hp.hpl.jena.db.impl.Free, com.hp.hpl.jena.graph.query.Fixed, com.hp.hpl.jena.graph.query.Bound,
| Element | | abstract public class Element (Code) | | An Element of a matching triple. Elements have associated indexes, their place
in the Domain storing the matching values. Subclasses represent constants,
binding occurances of variables, and bound instances of variables.
author:
hedgehog |
| Constructor Summary | |
| protected | Element(int index)
Initialise this Element with its allocated index. | | protected | Element()
Initialiser invoked by sub-classes which need no index. |
| Method Summary | |
| abstract public Node | asNodeMatch(Domain d)
Answer a Node suitable as a pattern-match element in a TripleMatch approximating
this Element. | | public int | getIndex()
Answer this Element's index in the Domains it is compiled for. | | abstract public boolean | match(Domain d, Node x)
Answer true if this Element matches x given the bindings in d. | | public String | toString()
|
| ANY | | final public static Element ANY(Code) | | The constant ANY matches anything and binds nothing
|
| index | | final protected int index(Code) | | |
| Element | | protected Element(int index)(Code) | | Initialise this Element with its allocated index.
|
| Element | | protected Element()(Code) | | Initialiser invoked by sub-classes which need no index.
|
| asNodeMatch | | abstract public Node asNodeMatch(Domain d)(Code) | | Answer a Node suitable as a pattern-match element in a TripleMatch approximating
this Element. Thus Bind elements map to null (or Node.ANY).
Parameters:
d - the domain holding the variable bindings the matched value (null if none, ie binding occurance or ANY) |
| getIndex | | public int getIndex()(Code) | | Answer this Element's index in the Domains it is compiled for.
|
| match | | abstract public boolean match(Domain d, Node x)(Code) | | Answer true if this Element matches x given the bindings in d. May side-effect d
by (re)binding if this element is a variable.
Parameters:
d - the variable bindings to read/update for variables
Parameters:
x - the value to match true if the match succeeded |
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