com.hp.hpl.mesa.rdf.jena.mem
Class ModelMem

java.lang.Object
  |
  +--com.hp.hpl.mesa.rdf.jena.common.ModelCom
        |
        +--com.hp.hpl.mesa.rdf.jena.mem.ModelMem

All Implemented Interfaces:

Model, ModelCon, ModelI, RDFReaderF, RDFWriterF

Direct Known Subclasses:

DAMLModelImpl

public class ModelMem

extends ModelCom

implements Model, ModelI

A main memory implemention of the RDF API.

This implementation of the RDF API stores its all its data in main memory. It supports all methods except the transaction calls.

This is a prototype implementation, and should be considered to be alpha quality code. It has not yet been performance optimised and is known to be wasteful of memory. It has been tested by loading the wordnet database (see Sample3) which results in a model containing over 600,000 statements.

Version:

Release='$Name: $' Revision='$Revision: 1.7 $' Date='$Date: 2001/09/23 13:51:18 $'

Author:

bwm

Constructor Summary

ModelMem()
Create an empty model.

Method Summary

Model	difference(Model model) Create a new model containing all the statements in this model which are not in another.
Model	intersection(Model model) Create a new model containing all the statements which are in both this model and another.
Model	query(Selector selector) Create a new model containing the statements matching a query.
boolean	supportsSetOperations() Determine whether this model supports set operations.
boolean	supportsTransactions() Determine whether this model supports transactions.
Model	union(Model model) Create a new model containing all the statements in this model together with all of those in another given model.

Methods inherited from class com.hp.hpl.mesa.rdf.jena.common.ModelCom

abort, add, add, add, add, add, add, add, add, add, add, add, add, add, add, begin, close, commit, containerContains, containerIndexOf, containerSize, contains, contains, contains, contains, contains, contains, contains, contains, contains, contains, contains, containsAll, containsAll, containsAny, containsAny, convert, convert, convert, createAlt, createAlt, createBag, createBag, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createProperty, createProperty, createResource, createResource, createResource, createResource, createResource, createResource, createSeq, createSeq, createStatement, createStatement, createStatement, createStatement, createStatement, createStatement, createStatement, createStatement, createStatement, createStatement, createStatement, equals, getAlt, getAlt, getBag, getBag, getProperty, getProperty, getProperty, getReader, getReader, getResource, getResource, getSeq, getSeq, getWriter, getWriter, independent, isReified, listContainerMembers, listNameSpaces, listObjects, listObjectsOfProperty, listObjectsOfProperty, listReifiedStatements, listStatements, listStatements, listSubjects, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, read, read, read, read, remove, remove, remove, setReaderClassName, setWriterClassName, size, write, write, write

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.hp.hpl.mesa.rdf.jena.model.Model

abort, add, add, add, begin, close, commit, contains, contains, contains, containsAll, containsAll, containsAny, containsAny, createLiteral, createLiteral, createProperty, createResource, createResource, createStatement, equals, getProperty, getProperty, getResource, independent, isReified, listNameSpaces, listObjects, listObjectsOfProperty, listObjectsOfProperty, listReifiedStatements, listStatements, listStatements, listSubjects, listSubjectsWithProperty, listSubjectsWithProperty, read, read, read, read, remove, size, write, write, write

Methods inherited from interface com.hp.hpl.mesa.rdf.jena.model.ModelCon

add, add, add, add, add, add, add, add, add, add, add, contains, contains, contains, contains, contains, contains, contains, contains, createAlt, createAlt, createBag, createBag, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createLiteral, createProperty, createResource, createResource, createResource, createResource, createSeq, createSeq, createStatement, createStatement, createStatement, createStatement, createStatement, createStatement, createStatement, createStatement, createStatement, createStatement, getAlt, getAlt, getBag, getBag, getProperty, getResource, getSeq, getSeq, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, listSubjectsWithProperty, remove, remove

Methods inherited from interface com.hp.hpl.mesa.rdf.jena.model.RDFReaderF

getReader, getReader, setReaderClassName

Methods inherited from interface com.hp.hpl.mesa.rdf.jena.model.RDFWriterF

getWriter, getWriter, setWriterClassName

Methods inherited from interface com.hp.hpl.mesa.rdf.jena.common.ModelI

containerContains, containerIndexOf, containerSize, convert, convert, convert, listContainerMembers

Constructor Detail

ModelMem

public ModelMem()

Create an empty model.

Method Detail

supportsTransactions

public boolean supportsTransactions()

Description copied from interface: Model

Determine whether this model supports transactions.

Specified by:

supportsTransactions in interface Model

Following copied from interface: com.hp.hpl.mesa.rdf.jena.model.Model

Returns:

true if this model supports transactions.

supportsSetOperations

public boolean supportsSetOperations()

Description copied from interface: Model

Determine whether this model supports set operations.

Specified by:

supportsSetOperations in interface Model

Following copied from interface: com.hp.hpl.mesa.rdf.jena.model.Model

Returns:

true if this model supports set operations.

query

public Model query(Selector selector)
            throws RDFException

Description copied from interface: Model

Create a new model containing the statements matching a query.

A statment is considered to match if the test method of s returns true when called on s.

Specified by:

query in interface Model

Following copied from interface: com.hp.hpl.mesa.rdf.jena.model.Model

Parameters:

s - A selector object.

Returns:

an iterator over the matching statements

Throws:

RDFException - Generic RDF exception.

union

public Model union(Model model)
            throws RDFException

Description copied from interface: Model

Create a new model containing all the statements in this model together with all of those in another given model.

Specified by:

union in interface Model

Following copied from interface: com.hp.hpl.mesa.rdf.jena.model.Model

Parameters:

model - The other model whose statements are to be included.

Returns:

A new model containing all the statements that are in either model

Throws:

RDFException - Generic RDF Exception

intersection

public Model intersection(Model model)
                   throws RDFException

Description copied from interface: Model

Create a new model containing all the statements which are in both this model and another. As models are sets of statements, a statement contained in both models will only appear once in the resulting model.

Specified by:

intersection in interface Model

Following copied from interface: com.hp.hpl.mesa.rdf.jena.model.Model

Parameters:

model - The other model.

Returns:

A new model containing all the statements that are in both models.

Throws:

RDFException - Generic RDF Exception

difference

public Model difference(Model model)
                 throws RDFException

Description copied from interface: Model

Create a new model containing all the statements in this model which are not in another.

Specified by:

difference in interface Model

Following copied from interface: com.hp.hpl.mesa.rdf.jena.model.Model

Parameters:

model - the other model whose statements are to be excluded.

Returns:

a new model containing all the statements in this model that are not in the given model.

Throws:

RDFException - Generic RDF Exception