/* Copyright 2002-2019 CS Systèmes d'Information
    * Licensed to CS Systèmes d'Information (CS) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * CS 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.orekit.errors;
  
  import java.text.MessageFormat;
  import java.util.Locale;
  
  import org.hipparchus.exception.Localizable;
  import org.hipparchus.exception.MathRuntimeException;
  
  /** This class is the base class for all specific exceptions thrown by
   * the Orekit classes.
  
   * <p>When the Orekit classes throw exceptions that are specific to
   * the package, these exceptions are always subclasses of
   * OrekitException. When exceptions that are already covered by the
   * standard java API should be thrown, like
   * ArrayIndexOutOfBoundsException or InvalidParameterException, these
   * standard exceptions are thrown rather than the Hipparchus specific
   * ones.</p>
   * <p>This class also provides utility methods to throw some standard
   * java exceptions with localized messages.</p>
   *
   * @author Luc Maisonobe
  
   */
  
  public class OrekitException extends RuntimeException implements LocalizedException {
  
      /** Serializable UID. */
      private static final long serialVersionUID = 20150611L;
  
      /** Format specifier (to be translated). */
      private final Localizable specifier;
  
      /** Parts to insert in the format (no translation). */
      private final Object[] parts;
  
      /** Simple constructor.
       * Build an exception with a translated and formatted message
       * @param specifier format specifier (to be translated)
       * @param parts parts to insert in the format (no translation)
       */
      public OrekitException(final Localizable specifier, final Object... parts) {
          this.specifier = specifier;
          this.parts     = (parts == null) ? new Object[0] : parts.clone();
      }
  
      /** Copy constructor.
       * @param exception exception to copy from
       * @since 5.1
       */
      public OrekitException.html#OrekitException">OrekitException(final OrekitException exception) {
          super(exception);
          this.specifier = exception.specifier;
          this.parts     = exception.parts.clone();
      }
  
      /** Simple constructor.
       * Build an exception from a cause and with a specified message
       * @param message descriptive message
       * @param cause underlying cause
       */
      public OrekitException(final Localizable message, final Throwable cause) {
          super(cause);
          this.specifier = message;
          this.parts     = new Object[0];
      }
  
      /** Simple constructor.
       * Build an exception from a cause and with a translated and formatted message
       * @param cause underlying cause
       * @param specifier format specifier (to be translated)
       * @param parts parts to insert in the format (no translation)
       */
      public OrekitException(final Throwable cause, final Localizable specifier,
                             final Object... parts) {
          super(cause);
          this.specifier = specifier;
          this.parts     = (parts == null) ? new Object[0] : parts.clone();
      }
  
      /** Simple constructor.
       * Build an exception from an Hipparchus exception
       * @param exception underlying Hipparchus exception
      * @since 6.0
      */
     public OrekitException(final MathRuntimeException exception) {
         super(exception);
         this.specifier = exception.getSpecifier();
         this.parts     = exception.getParts();
     }
 
     /** {@inheritDoc} */
     @Override
     public String getMessage(final Locale locale) {
         return buildMessage(locale, specifier, parts);
     }
 
     /** {@inheritDoc} */
     @Override
     public String getMessage() {
         return getMessage(Locale.US);
     }
 
     /** {@inheritDoc} */
     @Override
     public String getLocalizedMessage() {
         return getMessage(Locale.getDefault());
     }
 
     /** {@inheritDoc} */
     @Override
     public Localizable getSpecifier() {
         return specifier;
     }
 
     /** {@inheritDoc} */
     @Override
     public Object[] getParts() {
         return parts.clone();
     }
 
     /** Recover a OrekitException, possibly embedded in a {@link MathRuntimeException}.
      * <p>
      * If the {@code MathRuntimeException} does not embed a OrekitException, a
      * new one will be created.
      * </p>
      * @param exception MathRuntimeException to analyze
      * @return a (possibly embedded) OrekitException
      */
     public static OrekitException unwrap(final MathRuntimeException exception) {
 
         for (Throwable t = exception; t != null; t = t.getCause()) {
             if (t instanceof OrekitException) {
                 return (OrekitException) t;
             }
         }
 
         return new OrekitException(exception);
 
     }
 
     /**
      * Builds a message string by from a pattern and its arguments.
      * @param locale Locale in which the message should be translated
      * @param specifier format specifier (to be translated)
      * @param parts parts to insert in the format (no translation)
      * @return a message string
      */
     private static String buildMessage(final Locale locale, final Localizable specifier, final Object... parts) {
         if (specifier == null) {
             return "";
         } else {
             final String localizedString = specifier.getLocalizedString(locale);
             if (localizedString == null) {
                 return "";
             } else {
                 return new MessageFormat(localizedString, locale).format(parts);
             }
         }
     }
 
 }