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/**
 * Copyright (c) 2004-2011 QOS.ch
 * All rights reserved.
 *
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 *
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 *
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
package org.slf4j.helpers;

/**
 * Holds the results of formatting done by {@link MessageFormatter}.
 * 
 * @author Joern Huxhorn
 */
public class FormattingTuple {
  
  
  static public FormattingTuple NULL = new FormattingTuple(null);
  
  private String message;
  private Throwable throwable;
  private Object[] argArray;
  
  public FormattingTuple(String message) {
    this(message, null, null);
  }

  public FormattingTuple(String message, Object[] argArray, Throwable throwable) {
    this.message = message;
    this.throwable = throwable;
    if(throwable == null) {
      this.argArray = argArray;
    } else {
      this.argArray = trimmedCopy(argArray);
    }
  }

  static Object[] trimmedCopy(Object[] argArray) {
    if(argArray == null || argArray.length == 0) {
      throw new  IllegalStateException("non-sensical empty or null argument array");
    }
    final int trimemdLen = argArray.length -1;
    Object[] trimmed = new Object[trimemdLen];
    System.arraycopy(argArray, 0, trimmed, 0, trimemdLen);
    return trimmed;
  }
  
  public String getMessage() {
    return message;
  }

  public Object[] getArgArray() {
    return argArray;
  }

  public Throwable getThrowable() {
    return throwable;
  }

}