http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
public class org.apache.fop.events.LoggingEventListener implements org.apache.fop.events.EventListener
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.fop.events.LoggingEventListener
  super_class: java.lang.Object
{
  private static org.apache.commons.logging.Log defaultLog;
    descriptor: Lorg/apache/commons/logging/Log;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC

  private org.apache.commons.logging.Log log;
    descriptor: Lorg/apache/commons/logging/Log;
    flags: (0x0002) ACC_PRIVATE

  private boolean skipFatal;
    descriptor: Z
    flags: (0x0002) ACC_PRIVATE

  private final java.util.Set<java.lang.String> loggedMessages;
    descriptor: Ljava/util/Set;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/util/Set<Ljava/lang/String;>;

  static final boolean $assertionsDisabled;
    descriptor: Z
    flags: (0x1018) ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 34
            ldc Lorg/apache/fop/events/LoggingEventListener;
            invokevirtual java.lang.Class.desiredAssertionStatus:()Z
            ifne 1
            iconst_1
            goto 2
      StackMap locals:
      StackMap stack:
         1: iconst_0
      StackMap locals:
      StackMap stack: int
         2: putstatic org.apache.fop.events.LoggingEventListener.$assertionsDisabled:Z
         3: .line 37
            ldc Lorg/apache/fop/events/LoggingEventListener;
            invokestatic org.apache.commons.logging.LogFactory.getLog:(Ljava/lang/Class;)Lorg/apache/commons/logging/Log;
            putstatic org.apache.fop.events.LoggingEventListener.defaultLog:Lorg/apache/commons/logging/Log;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.apache.fop.events.LoggingEventListener this
         0: .line 48
            aload 0 /* this */
            getstatic org.apache.fop.events.LoggingEventListener.defaultLog:Lorg/apache/commons/logging/Log;
            invokespecial org.apache.fop.events.LoggingEventListener.<init>:(Lorg/apache/commons/logging/Log;)V
         1: .line 49
            return
        end local 0 // org.apache.fop.events.LoggingEventListener this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/fop/events/LoggingEventListener;

  public void <init>(org.apache.commons.logging.Log);
    descriptor: (Lorg/apache/commons/logging/Log;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.apache.fop.events.LoggingEventListener this
        start local 1 // org.apache.commons.logging.Log log
         0: .line 57
            aload 0 /* this */
            aload 1 /* log */
            iconst_1
            invokespecial org.apache.fop.events.LoggingEventListener.<init>:(Lorg/apache/commons/logging/Log;Z)V
         1: .line 58
            return
        end local 1 // org.apache.commons.logging.Log log
        end local 0 // org.apache.fop.events.LoggingEventListener this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/fop/events/LoggingEventListener;
            0    2     1   log  Lorg/apache/commons/logging/Log;
    MethodParameters:
      Name  Flags
      log   

  public void <init>(org.apache.commons.logging.Log, boolean);
    descriptor: (Lorg/apache/commons/logging/Log;Z)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.apache.fop.events.LoggingEventListener this
        start local 1 // org.apache.commons.logging.Log log
        start local 2 // boolean skipFatal
         0: .line 65
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 42
            aload 0 /* this */
            new java.util.HashSet
            dup
            invokespecial java.util.HashSet.<init>:()V
            putfield org.apache.fop.events.LoggingEventListener.loggedMessages:Ljava/util/Set;
         2: .line 66
            aload 0 /* this */
            aload 1 /* log */
            putfield org.apache.fop.events.LoggingEventListener.log:Lorg/apache/commons/logging/Log;
         3: .line 67
            aload 0 /* this */
            iload 2 /* skipFatal */
            putfield org.apache.fop.events.LoggingEventListener.skipFatal:Z
         4: .line 68
            return
        end local 2 // boolean skipFatal
        end local 1 // org.apache.commons.logging.Log log
        end local 0 // org.apache.fop.events.LoggingEventListener this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    5     0       this  Lorg/apache/fop/events/LoggingEventListener;
            0    5     1        log  Lorg/apache/commons/logging/Log;
            0    5     2  skipFatal  Z
    MethodParameters:
           Name  Flags
      log        
      skipFatal  

  public org.apache.commons.logging.Log getLog();
    descriptor: ()Lorg/apache/commons/logging/Log;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.fop.events.LoggingEventListener this
         0: .line 75
            aload 0 /* this */
            getfield org.apache.fop.events.LoggingEventListener.log:Lorg/apache/commons/logging/Log;
            areturn
        end local 0 // org.apache.fop.events.LoggingEventListener this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/fop/events/LoggingEventListener;

  public void processEvent(org.apache.fop.events.Event);
    descriptor: (Lorg/apache/fop/events/Event;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=5, args_size=2
        start local 0 // org.apache.fop.events.LoggingEventListener this
        start local 1 // org.apache.fop.events.Event event
         0: .line 80
            aload 1 /* event */
            invokestatic org.apache.fop.events.EventFormatter.format:(Lorg/apache/fop/events/Event;)Ljava/lang/String;
            astore 2 /* msg */
        start local 2 // java.lang.String msg
         1: .line 81
            aload 1 /* event */
            invokevirtual org.apache.fop.events.Event.getSeverity:()Lorg/apache/fop/events/model/EventSeverity;
            astore 3 /* severity */
        start local 3 // org.apache.fop.events.model.EventSeverity severity
         2: .line 82
            aload 3 /* severity */
            getstatic org.apache.fop.events.model.EventSeverity.INFO:Lorg/apache/fop/events/model/EventSeverity;
            if_acmpne 5
         3: .line 83
            aload 0 /* this */
            getfield org.apache.fop.events.LoggingEventListener.log:Lorg/apache/commons/logging/Log;
            aload 2 /* msg */
            invokeinterface org.apache.commons.logging.Log.info:(Ljava/lang/Object;)V
         4: .line 84
            goto 28
      StackMap locals: java.lang.String org.apache.fop.events.model.EventSeverity
      StackMap stack:
         5: aload 3 /* severity */
            getstatic org.apache.fop.events.model.EventSeverity.WARN:Lorg/apache/fop/events/model/EventSeverity;
            if_acmpne 14
         6: .line 90
            aload 1 /* event */
            invokevirtual org.apache.fop.events.Event.getEventGroupID:()Ljava/lang/String;
            astore 4 /* eventGroupID */
        start local 4 // java.lang.String eventGroupID
         7: .line 91
            aload 4 /* eventGroupID */
            ldc "org.apache.fop.fonts.FontEventProducer"
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 12
         8: .line 92
            aload 0 /* this */
            getfield org.apache.fop.events.LoggingEventListener.loggedMessages:Ljava/util/Set;
            aload 2 /* msg */
            invokeinterface java.util.Set.contains:(Ljava/lang/Object;)Z
            ifne 28
         9: .line 93
            aload 0 /* this */
            getfield org.apache.fop.events.LoggingEventListener.loggedMessages:Ljava/util/Set;
            aload 2 /* msg */
            invokeinterface java.util.Set.add:(Ljava/lang/Object;)Z
            pop
        10: .line 94
            aload 0 /* this */
            getfield org.apache.fop.events.LoggingEventListener.log:Lorg/apache/commons/logging/Log;
            aload 2 /* msg */
            invokeinterface org.apache.commons.logging.Log.warn:(Ljava/lang/Object;)V
        11: .line 96
            goto 28
        12: .line 97
      StackMap locals: java.lang.String
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.events.LoggingEventListener.log:Lorg/apache/commons/logging/Log;
            aload 2 /* msg */
            invokeinterface org.apache.commons.logging.Log.warn:(Ljava/lang/Object;)V
        end local 4 // java.lang.String eventGroupID
        13: .line 99
            goto 28
      StackMap locals:
      StackMap stack:
        14: aload 3 /* severity */
            getstatic org.apache.fop.events.model.EventSeverity.ERROR:Lorg/apache/fop/events/model/EventSeverity;
            if_acmpne 20
        15: .line 100
            aload 1 /* event */
            ldc "e"
            invokevirtual org.apache.fop.events.Event.getParam:(Ljava/lang/String;)Ljava/lang/Object;
            ifnull 18
        16: .line 101
            aload 0 /* this */
            getfield org.apache.fop.events.LoggingEventListener.log:Lorg/apache/commons/logging/Log;
            aload 2 /* msg */
            aload 1 /* event */
            ldc "e"
            invokevirtual org.apache.fop.events.Event.getParam:(Ljava/lang/String;)Ljava/lang/Object;
            checkcast java.lang.Throwable
            invokeinterface org.apache.commons.logging.Log.error:(Ljava/lang/Object;Ljava/lang/Throwable;)V
        17: .line 102
            goto 28
        18: .line 103
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.events.LoggingEventListener.log:Lorg/apache/commons/logging/Log;
            aload 2 /* msg */
            invokeinterface org.apache.commons.logging.Log.error:(Ljava/lang/Object;)V
        19: .line 105
            goto 28
      StackMap locals:
      StackMap stack:
        20: aload 3 /* severity */
            getstatic org.apache.fop.events.model.EventSeverity.FATAL:Lorg/apache/fop/events/model/EventSeverity;
            if_acmpne 27
        21: .line 106
            aload 0 /* this */
            getfield org.apache.fop.events.LoggingEventListener.skipFatal:Z
            ifne 28
        22: .line 107
            aload 1 /* event */
            ldc "e"
            invokevirtual org.apache.fop.events.Event.getParam:(Ljava/lang/String;)Ljava/lang/Object;
            ifnull 25
        23: .line 108
            aload 0 /* this */
            getfield org.apache.fop.events.LoggingEventListener.log:Lorg/apache/commons/logging/Log;
            aload 2 /* msg */
            aload 1 /* event */
            ldc "e"
            invokevirtual org.apache.fop.events.Event.getParam:(Ljava/lang/String;)Ljava/lang/Object;
            checkcast java.lang.Throwable
            invokeinterface org.apache.commons.logging.Log.fatal:(Ljava/lang/Object;Ljava/lang/Throwable;)V
        24: .line 109
            goto 28
        25: .line 110
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.events.LoggingEventListener.log:Lorg/apache/commons/logging/Log;
            aload 2 /* msg */
            invokeinterface org.apache.commons.logging.Log.fatal:(Ljava/lang/Object;)V
        26: .line 113
            goto 28
        27: .line 114
      StackMap locals:
      StackMap stack:
            getstatic org.apache.fop.events.LoggingEventListener.$assertionsDisabled:Z
            ifne 28
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
        28: .line 116
      StackMap locals:
      StackMap stack:
            return
        end local 3 // org.apache.fop.events.model.EventSeverity severity
        end local 2 // java.lang.String msg
        end local 1 // org.apache.fop.events.Event event
        end local 0 // org.apache.fop.events.LoggingEventListener this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0   29     0          this  Lorg/apache/fop/events/LoggingEventListener;
            0   29     1         event  Lorg/apache/fop/events/Event;
            1   29     2           msg  Ljava/lang/String;
            2   29     3      severity  Lorg/apache/fop/events/model/EventSeverity;
            7   13     4  eventGroupID  Ljava/lang/String;
    MethodParameters:
       Name  Flags
      event  
}
SourceFile: "LoggingEventListener.java"