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RDF2go is an implementation-independent Java API with the design goals: portability (hence the name), performance and ease of implementation. This project was started at FZI Forschungszentrum Informatik Karlsruhe, Germany - www.fzi.de
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/**
 * LICENSE INFORMATION
 *
 * Copyright 2005-2008 by FZI (http://www.fzi.de).
 * Licensed under a BSD license (http://www.opensource.org/licenses/bsd-license.php)
 *  = Max Völkel
 *  = FZI Forschungszentrum Informatik Karlsruhe, Karlsruhe, Germany
 *  = 2010
 *
 * Further project information at http://semanticweb.org/wiki/RDF2Go
 */

package org.ontoware.rdf2go.model.impl;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.ontoware.rdf2go.exception.ModelRuntimeException;
import org.ontoware.rdf2go.model.DiffReader;
import org.ontoware.rdf2go.model.Model;
import org.ontoware.rdf2go.model.ModelChangedListener;
import org.ontoware.rdf2go.model.NotifyingModel;
import org.ontoware.rdf2go.model.Statement;
import org.ontoware.rdf2go.model.TriplePattern;
import org.ontoware.rdf2go.model.node.Node;
import org.ontoware.rdf2go.model.node.NodeOrVariable;
import org.ontoware.rdf2go.model.node.Resource;
import org.ontoware.rdf2go.model.node.ResourceOrVariable;
import org.ontoware.rdf2go.model.node.URI;
import org.ontoware.rdf2go.model.node.UriOrVariable;


/**
 * Adds notifying capabilites to existing models.
 * 
 * @author voelkel
 * 
 */
public class NotifyingModelLayer extends DelegatingModel implements NotifyingModel {
	
	/**
     * 
     */
    private static final long serialVersionUID = -285355000693599975L;

	public NotifyingModelLayer(Model model) {
		super(model);
	}
	
	// /////////////////////////////////
	// override methods to be able to notify
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.common.CommonModelWriter#addAll(org.ontoware
	 * .rdf2go.core.common.CommonModelReader)
	 */
	@Override
	public void addAll(Iterator other) throws ModelRuntimeException {
		while(other.hasNext()) {
			this.addStatement(other.next());
		}
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#addStatement(org.ontoware
	 * .rdf2go.core.node.Resource, org.ontoware.rdf2go.core.node.URI,
	 * org.ontoware.rdf2go.core.node.Node)
	 */
	@Override
	public void addStatement(Resource subject, URI predicate, Node object)
	        throws ModelRuntimeException {
		this.addStatement(super.getDelegatedModel().createStatement(subject, predicate, object));
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#addStatement(org.ontoware
	 * .rdf2go.core.node.Resource, org.ontoware.rdf2go.core.node.URI,
	 * java.lang.String, java.lang.String)
	 */
	@Override
	public void addStatement(Resource subject, URI predicate, String literal, String languageTag)
	        throws ModelRuntimeException {
		this.addStatement(getDelegatedModel().createStatement(subject, predicate,
		        getDelegatedModel().createLanguageTagLiteral(literal, languageTag)));
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#addStatement(org.ontoware
	 * .rdf2go.core.node.Resource, org.ontoware.rdf2go.core.node.URI,
	 * java.lang.String, org.ontoware.rdf2go.core.node.URI)
	 */
	@Override
	public void addStatement(Resource subject, URI predicate, String literal, URI datatypeURI)
	        throws ModelRuntimeException {
		this.addStatement(subject, predicate, getDelegatedModel().createDatatypeLiteral(literal,
		        datatypeURI));
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#addStatement(org.ontoware
	 * .rdf2go.core.node.Resource, org.ontoware.rdf2go.core.node.URI,
	 * java.lang.String)
	 */
	@Override
	public void addStatement(Resource subject, URI predicate, String literal)
	        throws ModelRuntimeException {
		this.addStatement(getDelegatedModel().createStatement(subject, predicate,
		        getDelegatedModel().createPlainLiteral(literal)));
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.ontoware.rdf2go.core.common.CommonModelWriter#addStatement(S)
	 */
	@Override
	public void addStatement(Statement statement) throws ModelRuntimeException {
		for(ModelChangedListener listener : this.modelChangeListener.keySet()) {
			TriplePattern pattern = this.modelChangeListener.get(listener);
			if(pattern == null || pattern.matches(statement)) {
				listener.addedStatement(statement);
			}
		}
		getDelegatedModel().addStatement(statement);
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#addStatement(java.lang.String
	 * , org.ontoware.rdf2go.core.node.URI, java.lang.String, java.lang.String)
	 */
	@Override
	public void addStatement(String subjectURIString, URI predicate, String literal,
	        String languageTag) throws ModelRuntimeException {
		this.addStatement(getDelegatedModel().createStatement(
		        getDelegatedModel().createURI(subjectURIString), predicate,
		        getDelegatedModel().createLanguageTagLiteral(literal, languageTag)));
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#addStatement(java.lang.String
	 * , org.ontoware.rdf2go.core.node.URI, java.lang.String,
	 * org.ontoware.rdf2go.core.node.URI)
	 */
	@Override
	public void addStatement(String subjectURIString, URI predicate, String literal, URI datatypeURI)
	        throws ModelRuntimeException {
		this.addStatement(getDelegatedModel().createStatement(
		        getDelegatedModel().createURI(subjectURIString), predicate,
		        getDelegatedModel().createDatatypeLiteral(literal, datatypeURI)));
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#addStatement(java.lang.String
	 * , org.ontoware.rdf2go.core.node.URI, java.lang.String)
	 */
	@Override
	public void addStatement(String subjectURIString, URI predicate, String literal)
	        throws ModelRuntimeException {
		this.addStatement(getDelegatedModel().createStatement(
		        getDelegatedModel().createURI(subjectURIString), predicate,
		        getDelegatedModel().createPlainLiteral(literal)));
	}
	
	// ///////////// remove
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.common.CommonModelWriter#removeAll(org.ontoware
	 * .rdf2go.core.common.CommonModelReader)
	 */
	@Override
	public void removeAll(Iterator other) throws ModelRuntimeException {
		while(other.hasNext()) {
			this.removeStatement(other.next());
		}
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#removeStatement(org.ontoware
	 * .rdf2go.core.node.Resource, org.ontoware.rdf2go.core.node.URI,
	 * org.ontoware.rdf2go.core.node.Node)
	 */
	@Override
	public void removeStatement(Resource subject, URI predicate, Node object)
	        throws ModelRuntimeException {
		this.removeStatement(getDelegatedModel().createStatement(subject, predicate, object));
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#removeStatement(org.ontoware
	 * .rdf2go.core.node.Resource, org.ontoware.rdf2go.core.node.URI,
	 * java.lang.String, java.lang.String)
	 */
	@Override
	public void removeStatement(Resource subject, URI predicate, String literal, String languageTag)
	        throws ModelRuntimeException {
		this.removeStatement(getDelegatedModel().createStatement(subject, predicate,
		        getDelegatedModel().createLanguageTagLiteral(literal, languageTag)));
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#removeStatement(org.ontoware
	 * .rdf2go.core.node.Resource, org.ontoware.rdf2go.core.node.URI,
	 * java.lang.String, org.ontoware.rdf2go.core.node.URI)
	 */
	@Override
	public void removeStatement(Resource subject, URI predicate, String literal, URI datatypeURI)
	        throws ModelRuntimeException {
		this.removeStatement(subject, predicate, getDelegatedModel().createDatatypeLiteral(literal,
		        datatypeURI));
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#removeStatement(org.ontoware
	 * .rdf2go.core.node.Resource, org.ontoware.rdf2go.core.node.URI,
	 * java.lang.String)
	 */
	@Override
	public void removeStatement(Resource subject, URI predicate, String literal)
	        throws ModelRuntimeException {
		this.removeStatement(getDelegatedModel().createStatement(subject, predicate,
		        getDelegatedModel().createPlainLiteral(literal)));
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.ontoware.rdf2go.core.common.CommonModelWriter#removeStatement(S)
	 */
	@Override
	public void removeStatement(Statement statement) throws ModelRuntimeException {
		for(ModelChangedListener listener : this.modelChangeListener.keySet()) {
			TriplePattern pattern = this.modelChangeListener.get(listener);
			if(pattern == null || pattern.matches(statement)) {
				listener.removedStatement(statement);
			}
		}
		getDelegatedModel().removeStatement(statement);
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#removeStatement(java.lang
	 * .String, org.ontoware.rdf2go.core.node.URI, java.lang.String,
	 * java.lang.String)
	 */
	@Override
	public void removeStatement(String subjectURIString, URI predicate, String literal,
	        String languageTag) throws ModelRuntimeException {
		this.removeStatement(getDelegatedModel().createStatement(
		        getDelegatedModel().createURI(subjectURIString), predicate,
		        getDelegatedModel().createLanguageTagLiteral(literal, languageTag)));
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#removeStatement(java.lang
	 * .String, org.ontoware.rdf2go.core.node.URI, java.lang.String,
	 * org.ontoware.rdf2go.core.node.URI)
	 */
	@Override
	public void removeStatement(String subjectURIString, URI predicate, String literal,
	        URI datatypeURI) throws ModelRuntimeException {
		this.removeStatement(getDelegatedModel().createStatement(
		        getDelegatedModel().createURI(subjectURIString), predicate,
		        getDelegatedModel().createDatatypeLiteral(literal, datatypeURI)));
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.ontoware.rdf2go.core.triple.ModelWriter#removeStatement(java.lang
	 * .String, org.ontoware.rdf2go.core.node.URI, java.lang.String)
	 */
	@Override
	public void removeStatement(String subjectURIString, URI predicate, String literal)
	        throws ModelRuntimeException {
		this.removeStatement(getDelegatedModel().createStatement(
		        getDelegatedModel().createURI(subjectURIString), predicate,
		        getDelegatedModel().createPlainLiteral(literal)));
	}
	
	@Override
	public void removeStatements(ResourceOrVariable subject, UriOrVariable predicate,
	        NodeOrVariable object) throws ModelRuntimeException {
		ModelAddRemoveMemoryImpl toBeRemoved = new ModelAddRemoveMemoryImpl();
		toBeRemoved.addAll(this.findStatements(subject, predicate, object));
		this.removeAll(toBeRemoved.iterator());
		
		this.getDelegatedModel().removeAll(toBeRemoved.iterator());
	}
	
	// ////////// diff
	
	@Override
	public synchronized void update(DiffReader diff) throws ModelRuntimeException {
		for(ModelChangedListener listener : this.modelChangeListener.keySet()) {
			listener.performedUpdate(diff);
		}
		getDelegatedModel().update(diff);
	}
	
	// //////////////////////////////////
	// implement NotifyingModel
	
	private Map modelChangeListener = new HashMap();
	
	@Override
    public void addModelChangedListener(ModelChangedListener listener, TriplePattern pattern) {
		this.modelChangeListener.put(listener, pattern);
	}
	
	@Override
    public void addModelChangedListener(ModelChangedListener listener) {
		this.modelChangeListener.put(listener, null);
	}
	
	@Override
    public void removeModelChangedListener(ModelChangedListener listener) {
		this.modelChangeListener.remove(listener);
	}
	
}