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/*
 * JMockit Expectations
 * Copyright (c) 2006-2009 Rogério Liesenfeld
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package mockit.internal.expectations;

import java.util.*;

import mockit.*;
import mockit.internal.expectations.InvocationResult.*;

public final class InvocationResults
{
   private final Expectation expectation;
   private InvocationResult currentResult;
   private InvocationResult lastResult;
   private int resultCount;

   InvocationResults(Expectation expectation)
   {
      this.expectation = expectation;
   }

   public void addReturnValue(Object value)
   {
      InvocationResult result =
         value instanceof Delegate ?
            new DelegatedResult((Delegate) value) : new ReturnValueResult(value);

      addResult(result);
   }

   public void addReturnValues(Object... values)
   {
      for (Object value : values) {
         addReturnValue(value);
      }
   }

   public void addDeferredReturnValues(Iterator values)
   {
      InvocationResult result = new DeferredReturnValues(values);
      addResult(result);
      expectation.constraints.setUnlimitedMaxInvocations();
   }

   public void addThrowable(Throwable t)
   {
      addResult(new ThrowableResult(t));
   }

   private void addResult(InvocationResult result)
   {
      resultCount++;
      expectation.constraints.adjustMaxInvocations(resultCount);

      if (currentResult == null) {
         currentResult = result;
         lastResult = result;
      }
      else {
         lastResult.next = result;
         lastResult = result;
      }
   }

   Object produceResult(Object[] invocationArgs) throws Throwable
   {
      InvocationResult resultToBeProduced = currentResult;
      InvocationResult nextResult = resultToBeProduced.next;

      if (nextResult != null) {
         currentResult = nextResult;
      }

      return resultToBeProduced.produceResult(expectation.expectedInvocation, invocationArgs);
   }
}