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 abstract class org.apache.fop.area.AbstractOffDocumentItem implements org.apache.fop.area.OffDocumentItem
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: org.apache.fop.area.AbstractOffDocumentItem
  super_class: java.lang.Object
{
  public static final int IMMEDIATELY;
    descriptor: I
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 0

  public static final int AFTER_PAGE;
    descriptor: I
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  public static final int END_OF_DOC;
    descriptor: I
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 2

  public static final int START_OF_DOC;
    descriptor: I
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: 2

  protected int whenToProcess;
    descriptor: I
    flags: (0x0004) ACC_PROTECTED

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.apache.fop.area.AbstractOffDocumentItem this
         0: .line 28
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 56
            aload 0 /* this */
            iconst_0
            putfield org.apache.fop.area.AbstractOffDocumentItem.whenToProcess:I
         2: .line 28
            return
        end local 0 // org.apache.fop.area.AbstractOffDocumentItem this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/apache/fop/area/AbstractOffDocumentItem;

  public int getWhenToProcess();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.fop.area.AbstractOffDocumentItem this
         0: .line 63
            aload 0 /* this */
            getfield org.apache.fop.area.AbstractOffDocumentItem.whenToProcess:I
            ireturn
        end local 0 // org.apache.fop.area.AbstractOffDocumentItem this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/fop/area/AbstractOffDocumentItem;

  public abstract java.lang.String getName();
    descriptor: ()Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "AbstractOffDocumentItem.java"