ObserverException.java

/**
 * Copyright 2015 StreamSets Inc.
 *
 * Licensed under 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 com.streamsets.datacollector.util;

import com.streamsets.pipeline.api.ErrorCode;
import com.streamsets.pipeline.api.impl.ErrorMessage;

public class ObserverException extends Exception {

  private static Throwable getCause(Object... params) {
    Throwable throwable = null;
    if (params.length > 0 && params[params.length - 1] instanceof Throwable) {
      throwable = (Throwable) params[params.length - 1];
    }
    return throwable;
  }

  private final ErrorCode errorCode;
  private final ErrorMessage errorMessage;

  // last parameter can be an exception cause
  public ObserverException(ErrorCode errorCode, Object... params) {
    super(getCause(params));
    this.errorCode = errorCode;
    errorMessage = new ErrorMessage(errorCode, params);
  }

  public ErrorCode getErrorCode() {
    return errorCode;
  }

  @Override
  public String getMessage() {
    return errorMessage.getNonLocalized();
  }

  @Override
  public String getLocalizedMessage() {
    return errorMessage.getLocalized();
  }

}