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/*******************************************************************************
 * Copyright 2015-2024 Sergey Karpushin
 *
 * Licensed 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.summerb.webappboilerplate.utils.exceptions.translator;

import java.util.Arrays;
import java.util.List;

public class ExceptionUnwindingStrategyImpl implements ExceptionUnwindingStrategy {
  // NOTE: I'm using String here because in some cases not all classes will be
  // available, i.e. excluded from classpath. Don
  public static final List CLASS_NAMES_TO_SKIP =
      Arrays.asList(
          "org.springframework.web.util.NestedServletException",
          "java.lang.reflect.UndeclaredThrowableException",
          "java.lang.reflect.InvocationTargetException");

  @Override
  public Throwable getNextMeaningfulExc(Throwable current) {
    if (current == null) {
      return null;
    }
    Throwable cur = current;
    while (cur != null && isShouldSkipException(cur)) {
      if (cur == cur.getCause()) {
        break;
      }
      cur = cur.getCause();
    }
    return cur;
  }

  protected boolean isShouldSkipException(Throwable cur) {
    return CLASS_NAMES_TO_SKIP.contains(cur.getClass().getName());
  }
}