net.hasor.utils.ExceptionUtils Maven / Gradle / Ivy
/*
* Copyright 2008-2009 the original author or authors.
*
* Licensed 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 net.hasor.utils;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.StringTokenizer;
import java.util.function.Function;
/**
* Provides utilities for manipulating and examining
* Throwable objects.
* @version : 2014年9月25日
* @author 赵永春 ([email protected])
* @version $Id: ExceptionUtils.java 1436770 2013-01-22 07:09:45Z ggregory $
*/
public class ExceptionUtils {
public static RuntimeException toRuntimeException(Throwable proxy) {
return toRuntimeException(proxy, throwable -> {
return new RuntimeException(throwable.getClass().getName() + " - " + throwable.getMessage(), throwable);
});
}
/**将异常包装为 {@link RuntimeException}*/
public static RuntimeException toRuntimeException(Throwable proxy, Function convert) {
if (proxy instanceof InvocationTargetException && ((InvocationTargetException) proxy).getTargetException() != null) {
proxy = ((InvocationTargetException) proxy).getTargetException();
}
if (proxy instanceof RuntimeException) {
return (RuntimeException) proxy;
}
return convert.apply(proxy);
}
public static Throwable toRuntimeException(Throwable proxy, Class[] exceptionTypes) {
if (exceptionTypes != null) {
for (Class e : exceptionTypes) {
if (e.isInstance(exceptionTypes)) {
return proxy;
}
}
}
return new RuntimeException(proxy.getClass().getName() + " - " + proxy.getMessage(), proxy);
}
public static Throwable getRootCause(Throwable throwable) {
List list = getThrowableList(throwable);
return list.isEmpty() ? null : list.get(list.size() - 1);
}
private static Throwable getCauseUsingMethodName(Throwable throwable, String methodName) {
Method method = null;
try {
method = throwable.getClass().getMethod(methodName);
} catch (SecurityException | NoSuchMethodException var) { /**/}
if (method != null && Throwable.class.isAssignableFrom(method.getReturnType())) {
try {
return (Throwable) method.invoke(throwable);
} catch (IllegalArgumentException | InvocationTargetException | IllegalAccessException var) { /**/ }
}
return null;
}
public static int getThrowableCount(Throwable throwable) {
return getThrowableList(throwable).size();
}
public static Throwable[] getThrowables(Throwable throwable) {
List list = getThrowableList(throwable);
return list.toArray(new Throwable[0]);
}
public static List getThrowableList(Throwable throwable) {
ArrayList list;
for (list = new ArrayList<>(); throwable != null && !list.contains(throwable); throwable = throwable.getCause()) {
list.add(throwable);
}
return list;
}
public static int indexOfThrowable(Throwable throwable, Class clazz) {
return indexOf(throwable, clazz, 0, false);
}
public static int indexOfThrowable(Throwable throwable, Class clazz, int fromIndex) {
return indexOf(throwable, clazz, fromIndex, false);
}
public static int indexOfType(Throwable throwable, Class type) {
return indexOf(throwable, type, 0, true);
}
public static int indexOfType(Throwable throwable, Class type, int fromIndex) {
return indexOf(throwable, type, fromIndex, true);
}
private static int indexOf(Throwable throwable, Class type, int fromIndex, boolean subclass) {
if (throwable != null && type != null) {
if (fromIndex < 0) {
fromIndex = 0;
}
Throwable[] throwables = getThrowables(throwable);
if (fromIndex >= throwables.length) {
return -1;
} else {
int i;
if (subclass) {
for (i = fromIndex; i < throwables.length; ++i) {
if (type.isAssignableFrom(throwables[i].getClass())) {
return i;
}
}
} else {
for (i = fromIndex; i < throwables.length; ++i) {
if (type.equals(throwables[i].getClass())) {
return i;
}
}
}
return -1;
}
} else {
return -1;
}
}
public static void printRootCauseStackTrace(Throwable throwable) {
printRootCauseStackTrace(throwable, System.err);
}
public static void printRootCauseStackTrace(Throwable throwable, PrintStream stream) {
if (throwable == null) {
return;
}
Objects.requireNonNull(stream, "The PrintStream must not be null.");
String[] trace = getRootCauseStackTrace(throwable);
for (String s : trace) {
stream.println(s);
}
stream.flush();
}
public static void printRootCauseStackTrace(Throwable throwable, PrintWriter writer) {
if (throwable == null) {
return;
}
Objects.requireNonNull(writer, "The PrintWriter must not be null");
String[] trace = getRootCauseStackTrace(throwable);
for (String s : trace) {
writer.println(s);
}
writer.flush();
}
public static String[] getRootCauseStackTrace(Throwable throwable) {
if (throwable == null) {
return ArrayUtils.EMPTY_STRING_ARRAY;
} else {
Throwable[] throwables = getThrowables(throwable);
int count = throwables.length;
List frames = new ArrayList<>();
List nextTrace = getStackFrameList(throwables[count - 1]);
int i = count;
while (true) {
--i;
if (i < 0) {
return frames.toArray(new String[0]);
}
List trace = nextTrace;
if (i != 0) {
nextTrace = getStackFrameList(throwables[i - 1]);
removeCommonFrames(trace, nextTrace);
}
if (i == count - 1) {
frames.add(throwables[i].toString());
} else {
frames.add(" [wrapped] " + throwables[i].toString());
}
frames.addAll(nextTrace);
}
}
}
public static void removeCommonFrames(List causeFrames, List wrapperFrames) {
if (causeFrames != null && wrapperFrames != null) {
int causeFrameIndex = causeFrames.size() - 1;
for (int wrapperFrameIndex = wrapperFrames.size() - 1; causeFrameIndex >= 0 && wrapperFrameIndex >= 0; --wrapperFrameIndex) {
String causeFrame = causeFrames.get(causeFrameIndex);
String wrapperFrame = wrapperFrames.get(wrapperFrameIndex);
if (causeFrame.equals(wrapperFrame)) {
causeFrames.remove(causeFrameIndex);
}
--causeFrameIndex;
}
} else {
throw new IllegalArgumentException("The List must not be null");
}
}
public static String getStackTrace(Throwable throwable) {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw, true);
throwable.printStackTrace(pw);
return sw.getBuffer().toString();
}
public static String[] getStackFrames(Throwable throwable) {
return throwable == null ? ArrayUtils.EMPTY_STRING_ARRAY : getStackFrames(getStackTrace(throwable));
}
static String[] getStackFrames(String stackTrace) {
String linebreak = System.lineSeparator();
StringTokenizer frames = new StringTokenizer(stackTrace, linebreak);
ArrayList list = new ArrayList<>();
while (frames.hasMoreTokens()) {
list.add(frames.nextToken());
}
return list.toArray(new String[0]);
}
static List getStackFrameList(Throwable t) {
String stackTrace = getStackTrace(t);
String linebreak = System.lineSeparator();
StringTokenizer frames = new StringTokenizer(stackTrace, linebreak);
List list = new ArrayList<>();
boolean traceStarted = false;
while (frames.hasMoreTokens()) {
String token = frames.nextToken();
int at = token.indexOf("at");
if (at != -1 && token.substring(0, at).trim().isEmpty()) {
traceStarted = true;
list.add(token);
} else if (traceStarted) {
break;
}
}
return list;
}
public static String getMessage(Throwable th) {
if (th == null) {
return "";
} else {
String clsName = ClassUtils.getShortClassName(th, null);
String msg = th.getMessage();
return clsName + ": " + StringUtils.defaultString(msg);
}
}
public static String getRootCauseMessage(Throwable th) {
Throwable root = getRootCause(th);
root = root == null ? th : root;
return getMessage(root);
}
}