/*
    * ====================================================================
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.http.protocol;
  
  import java.io.IOException;
  import java.util.List;
  
  import org.apache.http.HttpException;
  import org.apache.http.HttpRequest;
  import org.apache.http.HttpRequestInterceptor;
  import org.apache.http.HttpResponse;
  import org.apache.http.HttpResponseInterceptor;
  import org.apache.http.annotation.ThreadSafe;
  
  /**
   * Immutable {@link HttpProcessor}.
   *
   * @since 4.1
   */
  @ThreadSafe // provided injected dependencies are immutable
  public final class ImmutableHttpProcessor implements HttpProcessor {
  
      private final HttpRequestInterceptor[] requestInterceptors;
      private final HttpResponseInterceptor[] responseInterceptors;
  
      public ImmutableHttpProcessor(
              final HttpRequestInterceptor[] requestInterceptors,
              final HttpResponseInterceptor[] responseInterceptors) {
          super();
          if (requestInterceptors != null) {
              final int l = requestInterceptors.length;
              this.requestInterceptors = new HttpRequestInterceptor[l];
              System.arraycopy(requestInterceptors, 0, this.requestInterceptors, 0, l);
          } else {
              this.requestInterceptors = new HttpRequestInterceptor[0];
          }
          if (responseInterceptors != null) {
              final int l = responseInterceptors.length;
              this.responseInterceptors = new HttpResponseInterceptor[l];
              System.arraycopy(responseInterceptors, 0, this.responseInterceptors, 0, l);
          } else {
              this.responseInterceptors = new HttpResponseInterceptor[0];
          }
      }
  
      /**
       * @since 4.3
       */
      public ImmutableHttpProcessor(
              final List<HttpRequestInterceptor> requestInterceptors,
              final List<HttpResponseInterceptor> responseInterceptors) {
          super();
          if (requestInterceptors != null) {
              final int l = requestInterceptors.size();
              this.requestInterceptors = requestInterceptors.toArray(new HttpRequestInterceptor[l]);
          } else {
              this.requestInterceptors = new HttpRequestInterceptor[0];
          }
          if (responseInterceptors != null) {
              final int l = responseInterceptors.size();
              this.responseInterceptors = responseInterceptors.toArray(new HttpResponseInterceptor[l]);
          } else {
              this.responseInterceptors = new HttpResponseInterceptor[0];
          }
      }
  
      /**
       * @deprecated (4.3) do not use.
       */
      @Deprecated
      public ImmutableHttpProcessor(
              final HttpRequestInterceptorList requestInterceptors,
              final HttpResponseInterceptorList responseInterceptors) {
          super();
          if (requestInterceptors != null) {
             final int count = requestInterceptors.getRequestInterceptorCount();
             this.requestInterceptors = new HttpRequestInterceptor[count];
             for (int i = 0; i < count; i++) {
                 this.requestInterceptors[i] = requestInterceptors.getRequestInterceptor(i);
             }
         } else {
             this.requestInterceptors = new HttpRequestInterceptor[0];
         }
         if (responseInterceptors != null) {
             final int count = responseInterceptors.getResponseInterceptorCount();
             this.responseInterceptors = new HttpResponseInterceptor[count];
             for (int i = 0; i < count; i++) {
                 this.responseInterceptors[i] = responseInterceptors.getResponseInterceptor(i);
             }
         } else {
             this.responseInterceptors = new HttpResponseInterceptor[0];
         }
     }
 
     public ImmutableHttpProcessor(final HttpRequestInterceptor... requestInterceptors) {
         this(requestInterceptors, null);
     }
 
     public ImmutableHttpProcessor(final HttpResponseInterceptor... responseInterceptors) {
         this(null, responseInterceptors);
     }
 
     public void process(
             final HttpRequest request,
             final HttpContext context) throws IOException, HttpException {
         for (final HttpRequestInterceptor requestInterceptor : this.requestInterceptors) {
             requestInterceptor.process(request, context);
         }
     }
 
     public void process(
             final HttpResponse response,
             final HttpContext context) throws IOException, HttpException {
         for (final HttpResponseInterceptor responseInterceptor : this.responseInterceptors) {
             responseInterceptor.process(response, context);
         }
     }
 
 }