org.apache.log4j.spi.ThrowableInformation Maven / Gradle / Ivy
/*
* Licensed to 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 org.apache.log4j.spi;
import java.io.Serializable;
import java.lang.reflect.Method;
import java.util.List;
import org.apache.log4j.Category;
import org.apache.logging.log4j.util.Strings;
/**
* Log4j's internal representation of throwables.
*/
public class ThrowableInformation implements Serializable {
static final long serialVersionUID = -4748765566864322735L;
private transient Throwable throwable;
private transient Category category;
private String[] rep;
private static final Method TO_STRING_LIST;
static {
Method method = null;
try {
final Class throwables = Class.forName("org.apache.logging.log4j.core.util.Throwables");
method = throwables.getMethod("toStringList", Throwable.class);
} catch (ClassNotFoundException | NoSuchMethodException ex) {
// Ignore the exception if Log4j-core is not present.
}
TO_STRING_LIST = method;
}
/**
* Constructs new instance.
*
* @since 1.2.15
* @param r String representation of throwable.
*/
public ThrowableInformation(final String[] r) {
this.rep = rep != null ? r.clone() : null;
}
/**
* Constructs new instance.
*/
public ThrowableInformation(final Throwable throwable) {
this.throwable = throwable;
}
/**
* Constructs a new instance.
*
* @param throwable throwable, may not be null.
* @param category category used to obtain ThrowableRenderer, may be null.
* @since 1.2.16
*/
public ThrowableInformation(final Throwable throwable, final Category category) {
this(throwable);
this.category = category;
this.rep = null;
}
public Throwable getThrowable() {
return throwable;
}
public synchronized String[] getThrowableStrRep() {
if (TO_STRING_LIST != null && throwable != null) {
try {
@SuppressWarnings("unchecked")
final List elements = (List) TO_STRING_LIST.invoke(null, throwable);
if (elements != null) {
return elements.toArray(Strings.EMPTY_ARRAY);
}
} catch (final ReflectiveOperationException ex) {
// Ignore the exception.
}
}
return rep;
}
}