ch.qos.logback.classic.spi.EventArgUtil Maven / Gradle / Ivy
/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2015, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.classic.spi;
public class EventArgUtil {
public static final Throwable extractThrowable(Object[] argArray) {
if (argArray == null || argArray.length == 0) {
return null;
}
final Object lastEntry = argArray[argArray.length - 1];
if (lastEntry instanceof Throwable) {
return (Throwable) lastEntry;
}
return null;
}
/**
* This method should be called only if {@link #successfulExtraction(Throwable)}
* returns true.
*
* @param argArray
* @return
*/
public 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 static Object[] arrangeArguments(Object[] argArray) {
return argArray;
}
public static boolean successfulExtraction(Throwable throwable) {
return throwable != null;
}
}