uimaj-core/src/main/java/org/apache/uima/I18nExceptionI.java

/*
 * 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.uima;

import java.util.Locale;

import org.apache.uima.internal.util.I18nUtil;

/**
 * Like InternationalizedException, but is an interface with default methods.
 * <p>
 * This common set of default implementations are intended to be added to sets of messages collected
 * into exception classes, which implement this, and separately extend one of the 3 superclasses:
 * <ul>
 * <li>Exception (for checked exceptions)</li>
 * <li>RuntimeException (for unchecked exceptions)</li>
 * <li>SaxException (for exceptions within XML parsing code</li>
 * </ul>
 */
public interface I18nExceptionI {

  String getResourceBundleName(); // like getMessageCatalog?

  String getMessageKey();

  Object[] getArguments();

  Throwable getCause();

  /**
   * Due to the fact that superclass definitions override any default methods, these next must be in
   * the class definitions as they override other supertype methods.
   * 
   * @return -
   */
  String getMessage();

  String getLocalizedMessage();

  /**
   * Gets the localized detail message for this exception using the specified <code>Locale</code>.
   * 
   * @param aLocale
   *          the locale to use for localizing the message
   * 
   * @return this exception's detail message, localized for the specified <code>Locale</code>.
   */
  default String getLocalizedMessage(Locale aLocale) {
    // check for null message
    if (getMessageKey() == null) {
      return null;
    }

    return I18nUtil.localizeMessage(getResourceBundleName(), aLocale, getMessageKey(),
            getArguments());
  }

  /**
   * Checks if this exception, or any of its root causes, has a particular UIMA message key. This
   * allows checking for particular error condition in test cases
   * 
   * @param messageKey
   *          to search for in the exception chain
   * @return true if this exception or any of its root causes has a particular UIMA message key.
   */
  default boolean hasMessageKey(String messageKey) {
    if (messageKey.equals(this.getMessageKey())) {
      return true;
    }
    Throwable cause = getCause();
    if (cause != null && cause instanceof I18nExceptionI) {
      return ((I18nExceptionI) cause).hasMessageKey(messageKey);
    }
    return false;
  }
}