package org.apache.http.impl.client;

import org.apache.http.params.AbstractHttpParams;
import org.apache.http.params.HttpParams;
import org.apache.http.util.Args;

/** @deprecated */
@Deprecated
public class ClientParamsStack extends AbstractHttpParams {
   protected final HttpParams applicationParams;
   protected final HttpParams clientParams;
   protected final HttpParams requestParams;
   protected final HttpParams overrideParams;

   public ClientParamsStack(HttpParams aparams, HttpParams cparams, HttpParams rparams, HttpParams oparams) {
      this.applicationParams = aparams;
      this.clientParams = cparams;
      this.requestParams = rparams;
      this.overrideParams = oparams;
   }

   public ClientParamsStack(ClientParamsStack stack) {
      this(stack.getApplicationParams(), stack.getClientParams(), stack.getRequestParams(), stack.getOverrideParams());
   }

   public ClientParamsStack(ClientParamsStack stack, HttpParams aparams, HttpParams cparams, HttpParams rparams, HttpParams oparams) {
      this(aparams != null ? aparams : stack.getApplicationParams(), cparams != null ? cparams : stack.getClientParams(), rparams != null ? rparams : stack.getRequestParams(), oparams != null ? oparams : stack.getOverrideParams());
   }

   public final HttpParams getApplicationParams() {
      return this.applicationParams;
   }

   public final HttpParams getClientParams() {
      return this.clientParams;
   }

   public final HttpParams getRequestParams() {
      return this.requestParams;
   }

   public final HttpParams getOverrideParams() {
      return this.overrideParams;
   }

   public Object getParameter(String name) {
      Args.notNull(name, "Parameter name");
      Object result = null;
      if (this.overrideParams != null) {
         result = this.overrideParams.getParameter(name);
      }

      if (result == null && this.requestParams != null) {
         result = this.requestParams.getParameter(name);
      }

      if (result == null && this.clientParams != null) {
         result = this.clientParams.getParameter(name);
      }

      if (result == null && this.applicationParams != null) {
         result = this.applicationParams.getParameter(name);
      }

      return result;
   }

   public HttpParams setParameter(String name, Object value) throws UnsupportedOperationException {
      throw new UnsupportedOperationException("Setting parameters in a stack is not supported.");
   }

   public boolean removeParameter(String name) {
      throw new UnsupportedOperationException("Removing parameters in a stack is not supported.");
   }

   public HttpParams copy() {
      return this;
   }
}
