/*
 * Copyright 2000-2018 JetBrains s.r.o.
 *
 * 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 jetbrains.buildServer.server.rest.errors;

import java.util.List;

/**
 * @author Yegor.Yarko
 *         Date: 02.12.13
 */
public class PartialUpdateError extends RuntimeException {
  public PartialUpdateError(String message, List<Throwable> causes) {
    super(getCombinedMessage(message, causes).toString(), getFirst(causes));
  }

  private static Throwable getFirst(final List<Throwable> causes) {
    if (causes == null || causes.size() == 0) {
      return null;
    }
    return causes.get(0);
  }

  private static StringBuilder getCombinedMessage(final String message, final List<Throwable> causes) {
    final StringBuilder resultMessage = new StringBuilder(message);
    if (causes.size() > 0) {
      resultMessage.append(", nested errors: ");
      for (Throwable cause : causes) {
        resultMessage.append(cause.toString()).append(", ");
      }
      resultMessage.delete(resultMessage.length() - 2, resultMessage.length());
    }
    return resultMessage;
  }
}