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| 1 | +package com.lishid.openinv.util; |
| 2 | + |
| 3 | +import org.slf4j.Marker; |
| 4 | +import org.slf4j.helpers.LegacyAbstractLogger; |
| 5 | +import org.slf4j.helpers.MessageFormatter; |
| 6 | +import org.slf4j.helpers.NormalizedParameters; |
| 7 | +import org.slf4j.spi.LocationAwareLogger; |
| 8 | + |
| 9 | +import java.util.logging.Level; |
| 10 | +import java.util.logging.LogRecord; |
| 11 | +import java.util.logging.Logger; |
| 12 | + |
| 13 | +/** |
| 14 | + * An adapter for wrapping a {@link java.util.logging.Logger} as a {@link org.slf4j.Logger}. |
| 15 | + * <br>Largely based on {@code JDK14LoggerAdapter}, which is not present at runtime. |
| 16 | + */ |
| 17 | +public class JulLoggerAdapter extends LegacyAbstractLogger implements LocationAwareLogger { |
| 18 | + |
| 19 | + private final Logger wrapped; |
| 20 | + |
| 21 | + public JulLoggerAdapter(Logger wrapped) { |
| 22 | + this.wrapped = wrapped; |
| 23 | + this.name = wrapped.getName(); |
| 24 | + } |
| 25 | + |
| 26 | + @Override |
| 27 | + protected String getFullyQualifiedCallerName() { |
| 28 | + return JulLoggerAdapter.class.getName(); |
| 29 | + } |
| 30 | + |
| 31 | + @Override |
| 32 | + protected void handleNormalizedLoggingCall( |
| 33 | + org.slf4j.event.Level slf4jLevel, |
| 34 | + Marker marker, |
| 35 | + String msg, |
| 36 | + Object[] args, |
| 37 | + Throwable thrown |
| 38 | + ) { |
| 39 | + Level level = fromSlf4jLevel(slf4jLevel); |
| 40 | + |
| 41 | + if (wrapped.isLoggable(level)) { |
| 42 | + normalizedLog(getFullyQualifiedCallerName(), level, msg, args, thrown); |
| 43 | + } |
| 44 | + } |
| 45 | + |
| 46 | + private void normalizedLog(String fqcn, Level level, String msg, Object[] args, Throwable thrown) { |
| 47 | + String formatted = MessageFormatter.basicArrayFormat(msg, args); |
| 48 | + LogRecord logRecord = new LogRecord(level, formatted); |
| 49 | + logRecord.setLoggerName(getName()); |
| 50 | + logRecord.setThrown(thrown); |
| 51 | + |
| 52 | + addSource(fqcn, logRecord); |
| 53 | + |
| 54 | + wrapped.log(logRecord); |
| 55 | + } |
| 56 | + |
| 57 | + private void addSource(String fqcn, LogRecord logRecord) { |
| 58 | + // TODO stackwalker? |
| 59 | + StackTraceElement[] trace = new Throwable().getStackTrace(); |
| 60 | + int maxElements = 12; |
| 61 | + int lastIgnored = maxElements; |
| 62 | + // Start from 2; 0 is above and 1 is caller of internal method. |
| 63 | + for (int i = 2; i < maxElements; ++i) { |
| 64 | + if (isIgnored(trace[i].getClassName(), fqcn)) { |
| 65 | + lastIgnored = i; |
| 66 | + } |
| 67 | + } |
| 68 | + |
| 69 | + if (lastIgnored < maxElements - 1) { |
| 70 | + StackTraceElement caller = trace[lastIgnored + 1]; |
| 71 | + logRecord.setSourceClassName(caller.getClassName()); |
| 72 | + logRecord.setSourceMethodName(caller.getMethodName()); |
| 73 | + } |
| 74 | + } |
| 75 | + |
| 76 | + private boolean isIgnored(String className, String fqcn) { |
| 77 | + if (className.equals(fqcn)) { |
| 78 | + return true; |
| 79 | + } |
| 80 | + // Ignore slf4j classes - they shouldn't be the source. |
| 81 | + if (className.startsWith("org.slf4j.")) { |
| 82 | + return true; |
| 83 | + } |
| 84 | + return className.equals(getFullyQualifiedCallerName()); |
| 85 | + } |
| 86 | + |
| 87 | + @Override |
| 88 | + public void log(Marker marker, String callerFqn, int levelInt, String msg, Object[] args, Throwable thrown) { |
| 89 | + Level level = fromSlf4jLevel(org.slf4j.event.Level.intToLevel(levelInt)); |
| 90 | + |
| 91 | + if (!wrapped.isLoggable(level)) { |
| 92 | + return; |
| 93 | + } |
| 94 | + |
| 95 | + NormalizedParameters params = NormalizedParameters.normalize(msg, args, thrown); |
| 96 | + normalizedLog(callerFqn, level, params.getMessage(), params.getArguments(), params.getThrowable()); |
| 97 | + } |
| 98 | + |
| 99 | + private Level fromSlf4jLevel(org.slf4j.event.Level level) { |
| 100 | + return switch (level) { |
| 101 | + case TRACE -> Level.FINEST; |
| 102 | + case DEBUG -> Level.FINE; |
| 103 | + case INFO -> Level.INFO; |
| 104 | + case WARN -> Level.WARNING; |
| 105 | + case ERROR -> Level.SEVERE; |
| 106 | + }; |
| 107 | + } |
| 108 | + |
| 109 | + @Override |
| 110 | + public boolean isTraceEnabled() { |
| 111 | + return wrapped.isLoggable(Level.FINEST); |
| 112 | + } |
| 113 | + |
| 114 | + @Override |
| 115 | + public boolean isDebugEnabled() { |
| 116 | + return wrapped.isLoggable(Level.FINE); |
| 117 | + } |
| 118 | + |
| 119 | + @Override |
| 120 | + public boolean isInfoEnabled() { |
| 121 | + return wrapped.isLoggable(Level.INFO); |
| 122 | + } |
| 123 | + |
| 124 | + @Override |
| 125 | + public boolean isWarnEnabled() { |
| 126 | + return wrapped.isLoggable(Level.WARNING); |
| 127 | + } |
| 128 | + |
| 129 | + @Override |
| 130 | + public boolean isErrorEnabled() { |
| 131 | + return wrapped.isLoggable(Level.SEVERE); |
| 132 | + } |
| 133 | + |
| 134 | +} |
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