63 lines
2.0 KiB
Java
63 lines
2.0 KiB
Java
/*
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* Minecraft Forge
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* Copyright (c) 2016-2018.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation version 2.1
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* of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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package net.minecraftforge.fml.common;
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import java.io.PrintStream;
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import org.apache.logging.log4j.Logger;
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/**
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* PrintStream which redirects it's output to a given logger.
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*
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* @author Arkan
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*/
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public class TracingPrintStream extends PrintStream {
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private Logger logger;
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private int BASE_DEPTH = 3;
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public TracingPrintStream(Logger logger, PrintStream original) {
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super(original);
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this.logger = logger;
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}
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@Override
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public void println(Object o) {
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logger.info("{}{}", getPrefix(), o);
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}
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@Override
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public void println(String s) {
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logger.info("{}{}", getPrefix(), s);
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}
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private String getPrefix() {
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StackTraceElement[] elems = Thread.currentThread().getStackTrace();
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StackTraceElement elem = elems[BASE_DEPTH]; // The caller is always at BASE_DEPTH, including this call.
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if (elem.getClassName().startsWith("kotlin.io.")) {
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elem = elems[BASE_DEPTH + 2]; // Kotlins IoPackage masks origins 2 deeper in the stack.
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} else if (elem.getClassName().startsWith("java.lang.Throwable")) {
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elem = elems[BASE_DEPTH + 4];
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}
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return "[" + elem.getClassName() + ":" + elem.getMethodName() + ":" + elem.getLineNumber() + "]: ";
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}
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}
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