com.taobao.middleware.logger.util.FormattingTuple Maven / Gradle / Ivy

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package com.taobao.middleware.logger.util;

/**
 * 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;
  }

}