org.mqnaas.network.impl.NetworkRootResourceProvider.java Source code

Introduction

Here is the source code for org.mqnaas.network.impl.NetworkRootResourceProvider.java

Source

package org.mqnaas.network.impl;

/*
 * #%L
 * MQNaaS :: Network Implementation
 * %%
 * Copyright (C) 2007 - 2015 Fundaci Privada i2CAT, Internet i
 *          Innovaci a Catalunya
 * %%
 * 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.
 * #L%
 */

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

import org.apache.commons.lang3.StringUtils;
import org.mqnaas.core.api.IResource;
import org.mqnaas.core.api.IRootResource;
import org.mqnaas.core.api.IRootResourceProvider;
import org.mqnaas.core.api.Specification;
import org.mqnaas.core.api.Specification.Type;
import org.mqnaas.core.api.annotations.Resource;
import org.mqnaas.core.api.exceptions.ApplicationActivationException;
import org.mqnaas.core.api.exceptions.ResourceNotFoundException;

/**
 * Implementation of the {@link IRootResourceProvider} backed by a {@link CopyOnWriteArrayList} binding to <b>virtual</b> networks only.
 * 
 * @author Georg Mansky-Kummert
 */
public class NetworkRootResourceProvider implements IRootResourceProvider {

    private List<IRootResource> resources;

    @Resource
    IResource resource;

    public static boolean isSupporting(IRootResource resource) {
        Specification specification = resource.getDescriptor().getSpecification();

        return specification.getType() == Type.NETWORK && StringUtils.equals(specification.getModel(), "virtual");
    }

    @Override
    public void activate() throws ApplicationActivationException {
        resources = new CopyOnWriteArrayList<IRootResource>();
    }

    @Override
    public void deactivate() {
    }

    @Override
    public List<IRootResource> getRootResources() {
        return new ArrayList<IRootResource>(resources);
    }

    @Override
    public void setRootResources(Collection<IRootResource> rootResources) {
        resources.clear();
        resources.addAll(rootResources);
    }

    @Override
    public List<IRootResource> getRootResources(Type type, String model, String version)
            throws ResourceNotFoundException {
        List<IRootResource> filteredResources = new ArrayList<IRootResource>();

        for (IRootResource resource : getRootResources()) {

            Specification specification = resource.getDescriptor().getSpecification();

            // Unspecified model (=null) matches all models
            // Unspecified version (=null) matches all versions
            // Specified fields (type, model and version !=null) match only the same value
            boolean matches = true;
            matches &= (type != null) ? specification.getType().equals(type) : true;
            matches &= (model != null) ? StringUtils.equals(specification.getModel(), model) : true;
            matches &= (version != null) ? StringUtils.equals(specification.getVersion(), version) : true;

            if (matches)
                filteredResources.add(resource);

        }

        return filteredResources;
    }

    @Override
    public IRootResource getRootResource(String id) throws ResourceNotFoundException {
        for (IRootResource resource : resources) {
            if (StringUtils.equals(id, resource.getId()))
                return resource;
        }

        throw new ResourceNotFoundException("No resource found with this id: " + id);
    }

}