package com.atlassian.plugins.rest.common.interceptor.impl;
   
   import com.atlassian.plugins.rest.common.interceptor.MethodInvocation;
   import com.atlassian.plugins.rest.common.interceptor.ResourceInterceptor;
   import com.sun.jersey.api.core.HttpContext;
   import com.sun.jersey.api.model.AbstractResourceMethod;
   
   import java.lang.reflect.InvocationTargetException;
   import java.util.List;
  import java.util.ArrayList;
  
  /**
   * Default implementation of the {@link MethodInvocation}.  Continually calls interceptors until empty.
   *
   * @since 2.0 
   */
  class DefaultMethodInvocation implements MethodInvocation
  {
      private final List<ResourceInterceptor> interceptors;
      private final Object resource;
      private final HttpContext httpContext;
      private final AbstractResourceMethod method;
      private final Object[] parameters;
  
      public DefaultMethodInvocation(Object resource, AbstractResourceMethod method, HttpContext httpContext, List<ResourceInterceptor> interceptors,
                                     Object[] params)
      {
          this.resource = resource;
          this.method = method;
          this.httpContext = httpContext;
          this.interceptors = new ArrayList<ResourceInterceptor>(interceptors);
          this.parameters = params;
      }
  
      public Object getResource()
      {
          return resource;
      }
  
      public HttpContext getHttpContext()
      {
          return httpContext;
      }
  
      public AbstractResourceMethod getMethod()
      {
          return method;
      }
  
      public Object[] getParameters()
      {
          return parameters;
      }
  
  
      public void invoke() throws IllegalAccessException, InvocationTargetException
      {
          if (!interceptors.isEmpty())
          {
              ResourceInterceptor interceptor = interceptors.remove(0);
              interceptor.intercept(this);
          }
          else
          {
              throw new IllegalStateException("End of interceptor chain");
          }
      }
  }