/* 
* ============LICENSE_START=======================================================
* SPARKY (AAI UI service)
* ================================================================================
* Copyright © 2017 AT&T Intellectual Property.
* Copyright © 2017 Amdocs
* All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
* 
* ECOMP and OpenECOMP are trademarks
* and service marks of AT&T Intellectual Property.
*/

package org.openecomp.sparky.util;

/**
 * The Class ExceptionHelper.
 */
public class ExceptionHelper {
   
  /**
   * Extract stack trace elements.
   *
   * @param maxNumberOfElementsToCapture the max number of elements to capture
   * @param exc the exc
   * @return the string
   */
  public static String extractStackTraceElements(int maxNumberOfElementsToCapture, Exception exc) {
    StringBuilder sb = new StringBuilder(128);

    StackTraceElement[] stackTraceElements = exc.getStackTrace();

    if (stackTraceElements != null) {

      /*
       * We want to avoid an index out-of-bounds error, so we will make sure to only extract the
       * number of frames from the stack trace that actually exist.
       */

      int numFramesToExtract = Math.min(maxNumberOfElementsToCapture, stackTraceElements.length);

      for (int x = 0; x < numFramesToExtract; x++) {
        sb.append(stackTraceElements[x]).append("\n");
      }

    }

    return sb.toString();
  }
}