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) 
class org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper implements org.apache.fop.pdf.PDFDocument$TrailerOutputHelper
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper
  super_class: java.lang.Object
{
  private org.apache.fop.pdf.ObjectStreamManager structureTreeObjectStreams;
    descriptor: Lorg/apache/fop/pdf/ObjectStreamManager;
    flags: (0x0002) ACC_PRIVATE

  final org.apache.fop.pdf.PDFDocument this$0;
    descriptor: Lorg/apache/fop/pdf/PDFDocument;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  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 1184
            ldc Lorg/apache/fop/pdf/PDFDocument;
            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.pdf.PDFDocument$CompressedTrailerOutputHelper.$assertionsDisabled:Z
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>(org.apache.fop.pdf.PDFDocument);
    descriptor: (Lorg/apache/fop/pdf/PDFDocument;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper this
         0: .line 1184
            aload 0 /* this */
            aload 1
            putfield org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.this$0:Lorg/apache/fop/pdf/PDFDocument;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/fop/pdf/PDFDocument$CompressedTrailerOutputHelper;
    MethodParameters:
        Name  Flags
      this$0  final

  public void outputStructureTreeElements(java.io.OutputStream);
    descriptor: (Ljava/io/OutputStream;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=4, args_size=2
        start local 0 // org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper this
        start local 1 // java.io.OutputStream stream
         0: .line 1190
            getstatic org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.$assertionsDisabled:Z
            ifne 1
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.this$0:Lorg/apache/fop/pdf/PDFDocument;
            getfield org.apache.fop.pdf.PDFDocument.structureTreeElements:Ljava/util/List;
            invokeinterface java.util.List.size:()I
            ifgt 1
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         1: .line 1191
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            new org.apache.fop.pdf.ObjectStreamManager
            dup
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.this$0:Lorg/apache/fop/pdf/PDFDocument;
            invokespecial org.apache.fop.pdf.ObjectStreamManager.<init>:(Lorg/apache/fop/pdf/PDFDocument;)V
            putfield org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.structureTreeObjectStreams:Lorg/apache/fop/pdf/ObjectStreamManager;
         2: .line 1192
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.this$0:Lorg/apache/fop/pdf/PDFDocument;
            getfield org.apache.fop.pdf.PDFDocument.structureTreeElements:Ljava/util/List;
            invokeinterface java.util.List.iterator:()Ljava/util/Iterator;
            astore 3
            goto 5
      StackMap locals: org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper java.io.OutputStream top java.util.Iterator
      StackMap stack:
         3: aload 3
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast org.apache.fop.pdf.PDFStructElem
            astore 2 /* structElem */
        start local 2 // org.apache.fop.pdf.PDFStructElem structElem
         4: .line 1193
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.structureTreeObjectStreams:Lorg/apache/fop/pdf/ObjectStreamManager;
            aload 2 /* structElem */
            invokevirtual org.apache.fop.pdf.ObjectStreamManager.add:(Lorg/apache/fop/pdf/CompressedObject;)V
        end local 2 // org.apache.fop.pdf.PDFStructElem structElem
         5: .line 1192
      StackMap locals:
      StackMap stack:
            aload 3
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 3
         6: .line 1195
            return
        end local 1 // java.io.OutputStream stream
        end local 0 // org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    7     0        this  Lorg/apache/fop/pdf/PDFDocument$CompressedTrailerOutputHelper;
            0    7     1      stream  Ljava/io/OutputStream;
            4    5     2  structElem  Lorg/apache/fop/pdf/PDFStructElem;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
        Name  Flags
      stream  

  public long outputCrossReferenceObject(java.io.OutputStream, org.apache.fop.pdf.xref.TrailerDictionary, int, int, int);
    descriptor: (Ljava/io/OutputStream;Lorg/apache/fop/pdf/xref/TrailerDictionary;III)J
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=9, locals=6, args_size=6
        start local 0 // org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper this
        start local 1 // java.io.OutputStream stream
        start local 2 // org.apache.fop.pdf.xref.TrailerDictionary trailerDictionary
        start local 3 // int first
        start local 4 // int last
        start local 5 // int size
         0: .line 1200
            getstatic org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.$assertionsDisabled:Z
            ifne 1
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.this$0:Lorg/apache/fop/pdf/PDFDocument;
            getfield org.apache.fop.pdf.PDFDocument.objects:Ljava/util/List;
            invokeinterface java.util.List.isEmpty:()Z
            ifne 1
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         1: .line 1201
      StackMap locals:
      StackMap stack:
            new org.apache.fop.pdf.xref.CrossReferenceStream
            dup
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.this$0:Lorg/apache/fop/pdf/PDFDocument;
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.this$0:Lorg/apache/fop/pdf/PDFDocument;
            dup
            getfield org.apache.fop.pdf.PDFDocument.objectcount:I
            iconst_1
            iadd
            dup_x1
            putfield org.apache.fop.pdf.PDFDocument.objectcount:I
            aload 2 /* trailerDictionary */
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.this$0:Lorg/apache/fop/pdf/PDFDocument;
            getfield org.apache.fop.pdf.PDFDocument.position:J
         2: .line 1202
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.this$0:Lorg/apache/fop/pdf/PDFDocument;
            getfield org.apache.fop.pdf.PDFDocument.indirectObjectOffsets:Ljava/util/List;
         3: .line 1203
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.structureTreeObjectStreams:Lorg/apache/fop/pdf/ObjectStreamManager;
            invokevirtual org.apache.fop.pdf.ObjectStreamManager.getCompressedObjectReferences:()Ljava/util/List;
         4: .line 1201
            invokespecial org.apache.fop.pdf.xref.CrossReferenceStream.<init>:(Lorg/apache/fop/pdf/PDFDocument;ILorg/apache/fop/pdf/xref/TrailerDictionary;JLjava/util/List;Ljava/util/List;)V
         5: .line 1204
            aload 1 /* stream */
            invokevirtual org.apache.fop.pdf.xref.CrossReferenceStream.output:(Ljava/io/OutputStream;)V
         6: .line 1205
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper.this$0:Lorg/apache/fop/pdf/PDFDocument;
            getfield org.apache.fop.pdf.PDFDocument.position:J
            lreturn
        end local 5 // int size
        end local 4 // int last
        end local 3 // int first
        end local 2 // org.apache.fop.pdf.xref.TrailerDictionary trailerDictionary
        end local 1 // java.io.OutputStream stream
        end local 0 // org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper this
      LocalVariableTable:
        Start  End  Slot               Name  Signature
            0    7     0               this  Lorg/apache/fop/pdf/PDFDocument$CompressedTrailerOutputHelper;
            0    7     1             stream  Ljava/io/OutputStream;
            0    7     2  trailerDictionary  Lorg/apache/fop/pdf/xref/TrailerDictionary;
            0    7     3              first  I
            0    7     4               last  I
            0    7     5               size  I
    Exceptions:
      throws java.io.IOException
    MethodParameters:
                   Name  Flags
      stream             
      trailerDictionary  
      first              
      last               
      size               
}
SourceFile: "PDFDocument.java"
NestHost: org.apache.fop.pdf.PDFDocument
InnerClasses:
  private CompressedTrailerOutputHelper = org.apache.fop.pdf.PDFDocument$CompressedTrailerOutputHelper of org.apache.fop.pdf.PDFDocument
  private abstract TrailerOutputHelper = org.apache.fop.pdf.PDFDocument$TrailerOutputHelper of org.apache.fop.pdf.PDFDocument