net.ontopia.topicmaps.rest.v1.association.AssociationsResource Maven / Gradle / Ivy

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/*
 * #!
 * Ontopia Rest
 * #-
 * Copyright (C) 2001 - 2016 The Ontopia Project
 * #-
 * 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.
 * !#
 */

package net.ontopia.topicmaps.rest.v1.association;

import java.util.Collection;
import net.ontopia.topicmaps.core.AssociationIF;
import net.ontopia.topicmaps.core.TopicIF;
import net.ontopia.topicmaps.core.TopicMapIF;
import net.ontopia.topicmaps.core.index.ClassInstanceIndexIF;
import net.ontopia.topicmaps.rest.exceptions.OntopiaRestErrors;
import net.ontopia.topicmaps.rest.model.Association;
import net.ontopia.topicmaps.rest.resources.AbstractTransactionalResource;
import net.ontopia.topicmaps.rest.resources.Parameters;
import org.restlet.data.Status;
import org.restlet.resource.Get;
import org.restlet.resource.Put;

public class AssociationsResource extends AbstractTransactionalResource {
	
	@Get
	public Collection getAssociations() {
		TopicIF topic = Parameters.ID.withExpected(TopicIF.class).optional(this);
		TopicIF type = Parameters.TYPE.optional(this);
		
		if (topic == null) {
			if (type != null) {
				return getIndex(ClassInstanceIndexIF.class).getAssociations(type);
			} else {
				return getTopicMap().getAssociations();
			}
		} else {
			if (type == null) {
				return topic.getAssociations();
			} else {
				return topic.getAssociationsByType(type);
			}
		}
	}
	
	@Put
	public void addAssociation(Association association) {
		if (optionalRequestParameter(Parameters.ID) != null) {
			setStatus(Status.CLIENT_ERROR_METHOD_NOT_ALLOWED);
			return;
		}
		
		if (association == null) {
			throw OntopiaRestErrors.MANDATORY_OBJECT_IS_NULL.build("Association");
		}

		TopicMapIF tm = getTopicMap();

		TopicIF type = Parameters.TYPE.optional(this);

		AssociationIF result;
		if (type != null) {
			result = getController(AssociationController.class).add(tm, type, association);
		} else {
			result = getController(AssociationController.class).add(tm, association);
		}
		store.commit();
		
		// todo: maybe this should be '302 Found' instead
		redirectSeeOther("associations/" + result.getObjectId()); // todo: how to make this stable?
	}
}