/**
    *
    * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com>
    *
    * ====================================================================
    * 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.jclouds.http.options;
  
  import java.util.Collection;
  
  import com.google.common.collect.LinkedHashMultimap;
  import com.google.common.collect.Multimap;
  
  /**
   * 
   * @see HttpRequestOptions
   * @author Adrian Cole
   * 
   */
  public class BaseHttpRequestOptions implements HttpRequestOptions {
  
     protected final Multimap<String, String> matrixParameters = LinkedHashMultimap.create();
     protected final Multimap<String, String> formParameters = LinkedHashMultimap.create();
     protected final Multimap<String, String> queryParameters = LinkedHashMultimap.create();
     protected final Multimap<String, String> headers = LinkedHashMultimap.create();
     protected String payload;
     protected String pathSuffix;
  
     public String buildStringPayload() {
        return payload;
     }
  
     protected String getFirstMatrixOrNull(String string) {
        Collection<String> values = matrixParameters.get(string);
        return (values != null && values.size() >= 1) ? values.iterator().next() : null;
     }
  
     protected String getFirstQueryOrNull(String string) {
        Collection<String> values = queryParameters.get(string);
        return (values != null && values.size() >= 1) ? values.iterator().next() : null;
     }
  
     protected String getFirstFormOrNull(String string) {
        Collection<String> values = formParameters.get(string);
        return (values != null && values.size() >= 1) ? values.iterator().next() : null;
     }
  
     protected String getFirstHeaderOrNull(String string) {
        Collection<String> values = headers.get(string);
        return (values != null && values.size() >= 1) ? values.iterator().next() : null;
     }
  
     protected void replaceHeader(String key, String value) {
        headers.removeAll(key);
        headers.put(key, value);
     }
  
     /**
      * {@inheritDoc}
      */
     public Multimap<String, String> buildRequestHeaders() {
        return headers;
     }
  
     /**
      * {@inheritDoc}
      */
     public Multimap<String, String> buildQueryParameters() {
        return queryParameters;
     }
  
     /**
      * {@inheritDoc}
      */
     public Multimap<String, String> buildMatrixParameters() {
        return matrixParameters;
     }
  
     public String buildPathSuffix() {
        return pathSuffix;
     }
  
     public Multimap<String, String> buildFormParameters() {
        return formParameters;
     }
  
     @Override
    public int hashCode() {
       final int prime = 31;
       int result = 1;
       result = prime * result + ((formParameters == null) ? 0 : formParameters.hashCode());
       result = prime * result + ((headers == null) ? 0 : headers.hashCode());
       result = prime * result + ((matrixParameters == null) ? 0 : matrixParameters.hashCode());
       result = prime * result + ((pathSuffix == null) ? 0 : pathSuffix.hashCode());
       result = prime * result + ((payload == null) ? 0 : payload.hashCode());
       result = prime * result + ((queryParameters == null) ? 0 : queryParameters.hashCode());
       return result;
    }
 
    @Override
    public boolean equals(Object obj) {
       if (this == obj)
          return true;
       if (obj == null)
          return false;
       if (getClass() != obj.getClass())
          return false;
       BaseHttpRequestOptions other = (BaseHttpRequestOptions) obj;
       if (formParameters == null) {
          if (other.formParameters != null)
             return false;
       } else if (!formParameters.equals(other.formParameters))
          return false;
       if (headers == null) {
          if (other.headers != null)
             return false;
       } else if (!headers.equals(other.headers))
          return false;
       if (matrixParameters == null) {
          if (other.matrixParameters != null)
             return false;
       } else if (!matrixParameters.equals(other.matrixParameters))
          return false;
       if (pathSuffix == null) {
          if (other.pathSuffix != null)
             return false;
       } else if (!pathSuffix.equals(other.pathSuffix))
          return false;
       if (payload == null) {
          if (other.payload != null)
             return false;
       } else if (!payload.equals(other.payload))
          return false;
       if (queryParameters == null) {
          if (other.queryParameters != null)
             return false;
       } else if (!queryParameters.equals(other.queryParameters))
          return false;
       return true;
    }
 
    @Override
    public String toString() {
       return "[formParameters=" + formParameters + ", headers=" + headers + ", matrixParameters="
                + matrixParameters + ", pathSuffix=" + pathSuffix + ", payload=" + payload
                + ", queryParameters=" + queryParameters + "]";
    }
 
 }