/*

  * 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.

  */

 package org.apache.commons.nabla.automatic.analysis;

 import org.apache.commons.nabla.core.DifferentiationException;

 /** Class used for delayed error reporting.

  */

 public class ErrorReporter {

     /** Error report. */

     private DifferentiationException reportedError;

     /** Register an exception to be reported later.

      * @param exception exception to be reported

      */

     public void register(final DifferentiationException exception) {

         reportedError = exception;

     }

     /** Check if an error has already been registered.

      * @return true if an error has already been registered

      */

     public boolean hasError() {

         return reportedError != null;

     }

     /** Report the error if any.

      * <p>If not error has been reported (i.e. if {@link #hasError()} returns

      * <code>false</code>), this method does nothing. Otherwise, it rethrows

      * the original exception.</p>

      * @exception DifferentiationException if some error occurred

      * during differentiation

      */

     public void reportErrors() throws DifferentiationException {

         if (reportedError != null) {

             throw reportedError;

         }

     }

 }