ServerPort.java

/*
 * Copyright 2011 <a href="mailto:lincolnbaxter@gmail.com">Lincoln Baxter, III</a>
 * 
 * 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 org.ocpsoft.rewrite.servlet.config;

import java.util.Arrays;

import javax.servlet.http.HttpServletRequest;

import org.ocpsoft.common.util.Assert;
import org.ocpsoft.common.util.Strings;
import org.ocpsoft.rewrite.config.Condition;
import org.ocpsoft.rewrite.context.EvaluationContext;
import org.ocpsoft.rewrite.servlet.http.event.HttpServletRewrite;
import org.ocpsoft.urlbuilder.Address;

/**
 * A {@link Condition} responsible for asserting on the {@link HttpServletRequest#getServerPort()}
 * 
 * @author <a href="mailto:lincolnbaxter@gmail.com">Lincoln Baxter, III</a>
 */
public abstract class ServerPort extends HttpCondition
{
   private final int[] ports;

   private ServerPort(final int... ports)
   {
      Assert.notNull(ports, "Must specify at least one valid port.");
      for (int port : ports) {

         if ((port < 1) || (port > 65535))
         {
            throw new IllegalArgumentException("Invalid port number: " + ports
                     + " - must be between 1 and 65535, inclusive.");
         }
      }
      this.ports = ports;
   }

   /**
    * Create a {@link Condition} to assert that the current {@link Address#getPort()} matches any of the given ports.
    */
   public static ServerPort is(final int... ports)
   {
      return new ServerPort(ports) {
         @Override
         public String toString()
         {
            return "ServerPort.is(" + Strings.join(Arrays.asList(ports), ", ") + ")";
         }
      };
   }

   @Override
   public boolean evaluateHttp(final HttpServletRewrite event, final EvaluationContext context)
   {
      int serverPort = event.getAddress().getPort();
      for (int port : ports) {
         if (serverPort == port)
            return true;
      }
      return false;
   }

}