org.topology.bgp_ls.config.nodes.impl.CapabilitiesParser.java Source code

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Here is the source code for org.topology.bgp_ls.config.nodes.impl.CapabilitiesParser.java

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/**
 *  Copyright 2012 Rainer Bieniek (Rainer.Bieniek@web.de)
 *
 *  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.
 * 
 * File: org.bgp4.config.nodes.impl.CapabilitiesParser.java 
 */
package org.topology.bgp_ls.config.nodes.impl;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.HierarchicalConfiguration;
import org.topology.bgp_ls.config.nodes.Capabilities;
import org.topology.bgp_ls.net.AddressFamily;
import org.topology.bgp_ls.net.ORFSendReceive;
import org.topology.bgp_ls.net.ORFType;
import org.topology.bgp_ls.net.SubsequentAddressFamily;
import org.topology.bgp_ls.net.capabilities.AutonomousSystem4Capability;
import org.topology.bgp_ls.net.capabilities.MultiProtocolCapability;
import org.topology.bgp_ls.net.capabilities.OutboundRouteFilteringCapability;
import org.topology.bgp_ls.net.capabilities.RouteRefreshCapability;
import org.topology.bgp_ls.config.nodes.CapabilitiesList;

/**
 * @author Rainer Bieniek (rainer@bgp4j.org)
 *
 */
public class CapabilitiesParser {

    public CapabilitiesParser() {
    }

    public Capabilities parseConfig(HierarchicalConfiguration hierarchicalConfiguration)
            throws ConfigurationException {
        CapabilitiesList caps = new CapabilitiesList();

        int as4Number = hierarchicalConfiguration.getInt("LargeAutonomousSystem[@local]", -1);

        if (as4Number > 0) {
            if (hierarchicalConfiguration.getBoolean("LargeAutonomousSystem[@optional]", false))
                caps.addOptionalCapability(new AutonomousSystem4Capability(as4Number));
            else
                caps.addRequiredCapability(new AutonomousSystem4Capability(as4Number));
        }

        if (hierarchicalConfiguration.containsKey("RouteRefresh")) {
            if (hierarchicalConfiguration.getBoolean("RouteRefresh[@optional]", false))
                caps.addOptionalCapability(new RouteRefreshCapability());
            else
                caps.addRequiredCapability(new RouteRefreshCapability());
        }
        parseMultiprotocolCapabilities(hierarchicalConfiguration.configurationsAt("MultiProtocol"), caps);
        parseOutboundRouteFilteringCapabilities(
                hierarchicalConfiguration.configurationsAt("OutboundRouteFiltering"), caps);

        return caps;
    }

    private void parseMultiprotocolCapabilities(List<HierarchicalConfiguration> capabilityConfigs,
            CapabilitiesList caps) throws ConfigurationException {
        for (HierarchicalConfiguration config : capabilityConfigs) {
            try {
                MultiProtocolCapability mp = new MultiProtocolCapability(
                        AddressFamily.fromString(config.getString("[@addressFamily]")),
                        SubsequentAddressFamily.fromString(config.getString("[@subsequentAddressFamily]")));

                if (config.getBoolean("[@optional]", false))
                    caps.addOptionalCapability(mp);
                else
                    caps.addRequiredCapability(mp);
            } catch (IllegalArgumentException e) {
                throw new ConfigurationException(e);
            }
        }
    }

    private void parseOutboundRouteFilteringCapabilities(List<HierarchicalConfiguration> capabilityConfigs,
            CapabilitiesList caps) throws ConfigurationException {
        for (HierarchicalConfiguration config : capabilityConfigs) {
            try {
                Map<ORFType, ORFSendReceive> filters = new HashMap<ORFType, ORFSendReceive>();

                for (HierarchicalConfiguration entryConfig : config.configurationsAt("Entry")) {
                    filters.put(ORFType.fromString(entryConfig.getString("[@type]")),
                            ORFSendReceive.fromString(entryConfig.getString("[@direction]")));
                }

                if (filters.size() == 0)
                    throw new ConfigurationException("filter type/direction pair required");

                OutboundRouteFilteringCapability orfc = new OutboundRouteFilteringCapability(
                        AddressFamily.fromString(config.getString("[@addressFamily]")),
                        SubsequentAddressFamily.fromString(config.getString("[@subsequentAddressFamily]")),
                        filters);

                if (config.getBoolean("[@optional]", false))
                    caps.addOptionalCapability(orfc);
                else
                    caps.addRequiredCapability(orfc);
            } catch (IllegalArgumentException e) {
                throw new ConfigurationException(e);
            }
        }
    }
}