labs/fgcp/src/main/java/org/jclouds/fujitsu/fgcp/domain/NAT.java

/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds licenses this file
 * to you 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 org.jclouds.fujitsu.fgcp.domain;

import java.util.LinkedHashSet;
import java.util.Set;

import com.google.common.base.Objects;
import com.google.common.collect.ImmutableSet;

/**
 * Holds the network address translation rules of a firewall.
 * 
 * @author Dies Koper
 */
public class NAT {
    private Set<Rule> rules = new LinkedHashSet<Rule>();

    /**
     * @return the rules
     */
    public Set<Rule> getRules() {
        return rules == null ? ImmutableSet.<Rule> of() : ImmutableSet
                .copyOf(rules);
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(rules);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        NAT that = NAT.class.cast(obj);
        return Objects.equal(this.rules, that.rules);
    }

    @Override
    public String toString() {
        return Objects.toStringHelper(this).omitNullValues()
                .add("rules", rules).toString();
    }
}