--- /dev/null
+/*
+ * 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 org.apache.log4j.Category;
+import org.apache.log4j.DefaultThrowableRenderer;
+
+/**
+ * ThrowableInformation is log4j's internal representation of
+ * throwables. It essentially consists of a string array, called
+ * 'rep', where the first element, that is rep[0], represents the
+ * string representation of the throwable (i.e. the value you get
+ * when you do throwable.toString()) and subsequent elements
+ * correspond the stack trace with the top most entry of the stack
+ * corresponding to the second entry of the 'rep' array that is
+ * rep[1].
+ *
+ * @author Ceki Gülcü
+ *
+ * */
+public class ThrowableInformation implements java.io.Serializable {
+
+ static final long serialVersionUID = -4748765566864322735L;
+
+ private transient Throwable throwable;
+ private transient Category category;
+ private String[] rep;
+
+ public
+ ThrowableInformation(Throwable throwable) {
+ this.throwable = throwable;
+ }
+
+ /**
+ * Create 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(Throwable throwable, Category category) {
+ this.throwable = throwable;
+ this.category = category;
+ }
+
+ /**
+ * Create new instance.
+ * @since 1.2.15
+ * @param r String representation of throwable.
+ */
+ public ThrowableInformation(final String[] r) {
+ if (r != null) {
+ rep = (String[]) r.clone();
+ }
+ }
+
+
+ public
+ Throwable getThrowable() {
+ return throwable;
+ }
+
+ public synchronized String[] getThrowableStrRep() {
+ if(rep == null) {
+ ThrowableRenderer renderer = null;
+ if (category != null) {
+ LoggerRepository repo = category.getLoggerRepository();
+ if (repo instanceof ThrowableRendererSupport) {
+ renderer = ((ThrowableRendererSupport) repo).getThrowableRenderer();
+ }
+ }
+ if (renderer == null) {
+ rep = DefaultThrowableRenderer.render(throwable);
+ } else {
+ rep = renderer.doRender(throwable);
+ }
+ }
+ return (String[]) rep.clone();
+ }
+}
+
+