org.ldp4j.application.data.IndividualReference Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of ldp4j-application-data Show documentation
LDP4j Application default Data API implementations
There is a newer version: 0.2.2
Show newest version
/**
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   This file is part of the LDP4j Project:
 *     http://www.ldp4j.org/
 *
 *   Center for Open Middleware
 *     http://www.centeropenmiddleware.com/
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   Copyright (C) 2014 Center for Open Middleware.
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *             http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 *   Artifact    : org.ldp4j.framework:ldp4j-application-data:0.1.0
 *   Bundle      : ldp4j-application-data-0.1.0.jar
 * #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=#
 */
package org.ldp4j.application.data;

import java.io.Serializable;
import java.net.URI;


public abstract class IndividualReference> {

	public static class ManagedIndividualReference extends IndividualReference {

		private ManagedIndividualReference(ManagedIndividualId resourceId) {
			super(resourceId,ManagedIndividual.class);
		}

		@Override
		public void accept(IndividualReferenceVisitor visitor) {
			visitor.visitManagedIndividualReference(this);
		}

	}

	public static class RelativeIndividualReference extends IndividualReference {

		private RelativeIndividualReference(RelativeIndividualId resourceId) {
			super(resourceId,RelativeIndividual.class);
		}

		@Override
		public void accept(IndividualReferenceVisitor visitor) {
			visitor.visitRelativeIndividualReference(this);
		}

	}

	@SuppressWarnings("rawtypes")
	public static final class LocalIndividualReference extends IndividualReference {

		private LocalIndividualReference(Name name) {
			super(name,LocalIndividual.class);
		}

		@Override
		public void accept(IndividualReferenceVisitor visitor) {
			visitor.visitLocalIndividualReference(this);
		}

	}

	public static final class ExternalIndividualReference extends IndividualReference {

		private ExternalIndividualReference(URI location) {
			super(location,ExternalIndividual.class);
		}

		@Override
		public void accept(IndividualReferenceVisitor visitor) {
			visitor.visitExternalIndividualReference(this);
		}

	}

	public static final class NewIndividualReference extends IndividualReference {

		private NewIndividualReference(URI location) {
			super(location,NewIndividual.class);
		}

		@Override
		public void accept(IndividualReferenceVisitor visitor) {
			visitor.visitNewIndividualReference(this);
		}

	}

	private static final class ReferenceBuilder implements IndividualVisitor {
		private IndividualReference result=null;

		private ReferenceBuilder() {
		}

		private IndividualReference builtReference() {
			return this.result;
		}
		@Override
		public void visitManagedIndividual(ManagedIndividual individual) {
			this.result=IndividualReference.managed(individual.id());
		}
		@Override
		public void visitLocalIndividual(LocalIndividual individual) {
			this.result=IndividualReference.anonymous(individual.id());
		}
		@Override
		public void visitExternalIndividual(ExternalIndividual individual) {
			this.result=IndividualReference.external(individual.id());
		}
		@Override
		public void visitRelativeIndividual(RelativeIndividual individual) {
			this.result=IndividualReference.relative(individual.id());
		}
		@Override
		public void visitNewIndividual(NewIndividual individual) {
			this.result=IndividualReference.newIndividual(individual.id());
		}
	}

	private final T id;
	private final Class clazz;

	private IndividualReference(T id, Class clazz) {
		this.id = id;
		this.clazz = clazz;
	}

	public T ref() {
		return id;
	}

	public boolean isPresent(DataSet dataSet) {
		return dataSet.hasIndividual(ref());
	}

	public Individual resolve(DataSet dataSet) {
		Individual resolvedIndividual = dataSet.individualOfId(ref());
		if(!clazz.isInstance(resolvedIndividual)) {
			throw new IllegalStateException("Unexpected type referred individual");
		}
		return clazz.cast(resolvedIndividual);
	}

	public Individual realize(DataSet dataSet) {
		return dataSet.individual(ref(),clazz);
	}

	abstract void accept(IndividualReferenceVisitor visitor);

	@SuppressWarnings("rawtypes")
	public static IndividualReference anonymous(Name name) {
		return new LocalIndividualReference(name);
	}

	public static IndividualReference managed(ManagedIndividualId individualId) {
		return new ManagedIndividualReference(individualId);
	}

	public static IndividualReference managed(Name name, String templateId) {
		return managed(ManagedIndividualId.createId(name, templateId));
	}

	public static IndividualReference managed(Name name, String templateId, URI indirectId) {
		return managed(indirectId,ManagedIndividualId.createId(name, templateId));
	}

	public static IndividualReference managed(URI indirectId, ManagedIndividualId parent) {
		return managed(ManagedIndividualId.createId(indirectId, parent));
	}

	public static IndividualReference relative(ManagedIndividualId parentId, URI path) {
		return relative(RelativeIndividualId.createId(parentId,path));
	}

	public static IndividualReference relative(RelativeIndividualId individualId) {
		return new RelativeIndividualReference(individualId);
	}

	public static IndividualReference external(URI location) {
		return new ExternalIndividualReference(location);
	}

	public static IndividualReference newIndividual(URI location) {
		return new NewIndividualReference(location);
	}

	@SuppressWarnings("unchecked")
	public static > IndividualReference fromIndividual(Individual value) {
		ReferenceBuilder builder = new ReferenceBuilder();
		value.accept(builder);
		return (IndividualReference)builder.builtReference();
	}
}