7b6336f1fd
Motivation: As netty 4.x supported Java 6 we had various if statements to check for java versions < 8. We can remove these now. Modification: Remove unnecessary if statements that check for java versions < 8. Result: Cleanup code.
73 lines
2.5 KiB
Java
73 lines
2.5 KiB
Java
/*
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* Copyright 2016 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.util.internal;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.PrintStream;
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import java.util.List;
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public final class ThrowableUtil {
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private ThrowableUtil() { }
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/**
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* Set the {@link StackTraceElement} for the given {@link Throwable}, using the {@link Class} and method name.
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*/
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public static <T extends Throwable> T unknownStackTrace(T cause, Class<?> clazz, String method) {
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cause.setStackTrace(new StackTraceElement[] { new StackTraceElement(clazz.getName(), method, null, -1)});
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return cause;
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}
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/**
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* Gets the stack trace from a Throwable as a String.
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*
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* @param cause the {@link Throwable} to be examined
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* @return the stack trace as generated by {@link Throwable#printStackTrace(java.io.PrintWriter)} method.
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*/
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public static String stackTraceToString(Throwable cause) {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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PrintStream pout = new PrintStream(out);
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cause.printStackTrace(pout);
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pout.flush();
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try {
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return new String(out.toByteArray());
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} finally {
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try {
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out.close();
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} catch (IOException ignore) {
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// ignore as should never happen
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}
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}
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}
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@SuppressJava6Requirement(reason = "Throwable addSuppressed is only available for >= 7. Has check for < 7.")
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public static void addSuppressed(Throwable target, Throwable suppressed) {
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target.addSuppressed(suppressed);
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}
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public static void addSuppressedAndClear(Throwable target, List<Throwable> suppressed) {
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addSuppressed(target, suppressed);
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suppressed.clear();
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}
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public static void addSuppressed(Throwable target, List<Throwable> suppressed) {
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for (Throwable t : suppressed) {
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addSuppressed(target, t);
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}
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}
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}
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