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.pdf.PDFFunction extends org.apache.fop.pdf.PDFObject
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.fop.pdf.PDFFunction
  super_class: org.apache.fop.pdf.PDFObject
{
  private final org.apache.fop.render.gradient.Function function;
    descriptor: Lorg/apache/fop/render/gradient/Function;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final java.util.List<org.apache.fop.pdf.PDFFunction> pdfFunctions;
    descriptor: Ljava/util/List;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/util/List<Lorg/apache/fop/pdf/PDFFunction;>;

  public void <init>(java.util.List<java.lang.Double>, java.util.List<java.lang.Double>, float[], float[], );
    descriptor: (Ljava/util/List;Ljava/util/List;[F[FD)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=9, locals=7, args_size=6
        start local 0 // org.apache.fop.pdf.PDFFunction this
        start local 1 // java.util.List domain
        start local 2 // java.util.List range
        start local 3 // float[] cZero
        start local 4 // float[] cOne
        start local 5 // double interpolationExponentN
         0: .line 76
            aload 0 /* this */
            new org.apache.fop.render.gradient.Function
            dup
            aload 1 /* domain */
            aload 2 /* range */
            aload 3 /* cZero */
            aload 4 /* cOne */
            dload 5 /* interpolationExponentN */
            invokespecial org.apache.fop.render.gradient.Function.<init>:(Ljava/util/List;Ljava/util/List;[F[FD)V
            invokespecial org.apache.fop.pdf.PDFFunction.<init>:(Lorg/apache/fop/render/gradient/Function;)V
         1: .line 78
            return
        end local 5 // double interpolationExponentN
        end local 4 // float[] cOne
        end local 3 // float[] cZero
        end local 2 // java.util.List range
        end local 1 // java.util.List domain
        end local 0 // org.apache.fop.pdf.PDFFunction this
      LocalVariableTable:
        Start  End  Slot                    Name  Signature
            0    2     0                    this  Lorg/apache/fop/pdf/PDFFunction;
            0    2     1                  domain  Ljava/util/List<Ljava/lang/Double;>;
            0    2     2                   range  Ljava/util/List<Ljava/lang/Double;>;
            0    2     3                   cZero  [F
            0    2     4                    cOne  [F
            0    2     5  interpolationExponentN  D
    Signature: (Ljava/util/List<Ljava/lang/Double;>;Ljava/util/List<Ljava/lang/Double;>;[F[FD)V
    MethodParameters:
                        Name  Flags
      domain                  
      range                   
      cZero                   
      cOne                    
      interpolationExponentN  

  public void <init>(org.apache.fop.render.gradient.Function);
    descriptor: (Lorg/apache/fop/render/gradient/Function;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.apache.fop.pdf.PDFFunction this
        start local 1 // org.apache.fop.render.gradient.Function function
         0: .line 82
            aload 0 /* this */
            aload 1 /* function */
            getstatic java.util.Collections.EMPTY_LIST:Ljava/util/List;
            invokespecial org.apache.fop.pdf.PDFFunction.<init>:(Lorg/apache/fop/render/gradient/Function;Ljava/util/List;)V
         1: .line 83
            return
        end local 1 // org.apache.fop.render.gradient.Function function
        end local 0 // org.apache.fop.pdf.PDFFunction this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0      this  Lorg/apache/fop/pdf/PDFFunction;
            0    2     1  function  Lorg/apache/fop/render/gradient/Function;
    MethodParameters:
          Name  Flags
      function  

  public void <init>(org.apache.fop.render.gradient.Function, java.util.List<org.apache.fop.pdf.PDFFunction>);
    descriptor: (Lorg/apache/fop/render/gradient/Function;Ljava/util/List;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.apache.fop.pdf.PDFFunction this
        start local 1 // org.apache.fop.render.gradient.Function function
        start local 2 // java.util.List pdfFunctions
         0: .line 85
            aload 0 /* this */
            invokespecial org.apache.fop.pdf.PDFObject.<init>:()V
         1: .line 86
            aload 0 /* this */
            aload 1 /* function */
            putfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
         2: .line 87
            aload 0 /* this */
            aload 2 /* pdfFunctions */
            putfield org.apache.fop.pdf.PDFFunction.pdfFunctions:Ljava/util/List;
         3: .line 88
            return
        end local 2 // java.util.List pdfFunctions
        end local 1 // org.apache.fop.render.gradient.Function function
        end local 0 // org.apache.fop.pdf.PDFFunction this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    4     0          this  Lorg/apache/fop/pdf/PDFFunction;
            0    4     1      function  Lorg/apache/fop/render/gradient/Function;
            0    4     2  pdfFunctions  Ljava/util/List<Lorg/apache/fop/pdf/PDFFunction;>;
    Signature: (Lorg/apache/fop/render/gradient/Function;Ljava/util/List<Lorg/apache/fop/pdf/PDFFunction;>;)V
    MethodParameters:
              Name  Flags
      function      
      pdfFunctions  

  public org.apache.fop.render.gradient.Function getFunction();
    descriptor: ()Lorg/apache/fop/render/gradient/Function;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.fop.pdf.PDFFunction this
         0: .line 91
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            areturn
        end local 0 // org.apache.fop.pdf.PDFFunction this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/fop/pdf/PDFFunction;

  public byte[] toPDF();
    descriptor: ()[B
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.fop.pdf.PDFFunction this
         0: .line 106
            aload 0 /* this */
            invokevirtual org.apache.fop.pdf.PDFFunction.toByteString:()[B
            areturn
        end local 0 // org.apache.fop.pdf.PDFFunction this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/fop/pdf/PDFFunction;

  public byte[] toByteString();
    descriptor: ()[B
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=4, args_size=1
        start local 0 // org.apache.fop.pdf.PDFFunction this
         0: .line 111
            new org.apache.fop.pdf.PDFFunction$1
            dup
            aload 0 /* this */
            invokespecial org.apache.fop.pdf.PDFFunction$1.<init>:(Lorg/apache/fop/pdf/PDFFunction;)V
            astore 1 /* subFunctionRenderer */
        start local 1 // org.apache.fop.render.gradient.Function$SubFunctionRenderer subFunctionRenderer
         1: .line 117
            new java.lang.StringBuilder
            dup
            invokespecial java.lang.StringBuilder.<init>:()V
            astore 2 /* out */
        start local 2 // java.lang.StringBuilder out
         2: .line 118
            new org.apache.fop.pdf.PDFFunction$2
            dup
            aload 0 /* this */
            invokespecial org.apache.fop.pdf.PDFFunction$2.<init>:(Lorg/apache/fop/pdf/PDFFunction;)V
            astore 3 /* doubleFormatter */
        start local 3 // org.apache.fop.render.gradient.GradientMaker$DoubleFormatter doubleFormatter
         3: .line 124
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            aload 2 /* out */
            aload 3 /* doubleFormatter */
            aload 1 /* subFunctionRenderer */
            invokevirtual org.apache.fop.render.gradient.Function.output:(Ljava/lang/StringBuilder;Lorg/apache/fop/render/gradient/GradientMaker$DoubleFormatter;Lorg/apache/fop/render/gradient/Function$SubFunctionRenderer;)Ljava/lang/String;
            pop
         4: .line 125
            aload 2 /* out */
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokestatic org.apache.fop.pdf.PDFFunction.encode:(Ljava/lang/String;)[B
            areturn
        end local 3 // org.apache.fop.render.gradient.GradientMaker$DoubleFormatter doubleFormatter
        end local 2 // java.lang.StringBuilder out
        end local 1 // org.apache.fop.render.gradient.Function$SubFunctionRenderer subFunctionRenderer
        end local 0 // org.apache.fop.pdf.PDFFunction this
      LocalVariableTable:
        Start  End  Slot                 Name  Signature
            0    5     0                 this  Lorg/apache/fop/pdf/PDFFunction;
            1    5     1  subFunctionRenderer  Lorg/apache/fop/render/gradient/Function$SubFunctionRenderer;
            2    5     2                  out  Ljava/lang/StringBuilder;
            3    5     3      doubleFormatter  Lorg/apache/fop/render/gradient/GradientMaker$DoubleFormatter;

  protected boolean contentEquals(org.apache.fop.pdf.PDFObject);
    descriptor: (Lorg/apache/fop/pdf/PDFObject;)Z
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=4, locals=3, args_size=2
        start local 0 // org.apache.fop.pdf.PDFFunction this
        start local 1 // org.apache.fop.pdf.PDFObject obj
         0: .line 130
            aload 1 /* obj */
            ifnonnull 2
         1: .line 131
            iconst_0
            ireturn
         2: .line 133
      StackMap locals:
      StackMap stack:
            aload 1 /* obj */
            aload 0 /* this */
            if_acmpne 4
         3: .line 134
            iconst_1
            ireturn
         4: .line 136
      StackMap locals:
      StackMap stack:
            aload 1 /* obj */
            instanceof org.apache.fop.pdf.PDFFunction
            ifne 6
         5: .line 137
            iconst_0
            ireturn
         6: .line 139
      StackMap locals:
      StackMap stack:
            aload 1 /* obj */
            checkcast org.apache.fop.pdf.PDFFunction
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            astore 2 /* func */
        start local 2 // org.apache.fop.render.gradient.Function func
         7: .line 140
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getFunctionType:()I
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getFunctionType:()I
            if_icmpeq 9
         8: .line 141
            iconst_0
            ireturn
         9: .line 143
      StackMap locals: org.apache.fop.render.gradient.Function
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getBitsPerSample:()I
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getBitsPerSample:()I
            if_icmpeq 11
        10: .line 144
            iconst_0
            ireturn
        11: .line 146
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getOrder:()I
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getOrder:()I
            if_icmpeq 13
        12: .line 147
            iconst_0
            ireturn
        13: .line 149
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getInterpolationExponentN:()D
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getInterpolationExponentN:()D
            dcmpl
            ifeq 15
        14: .line 150
            iconst_0
            ireturn
        15: .line 152
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getDomain:()Ljava/util/List;
            ifnull 18
        16: .line 153
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getDomain:()Ljava/util/List;
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getDomain:()Ljava/util/List;
            invokeinterface java.util.List.equals:(Ljava/lang/Object;)Z
            ifne 20
        17: .line 154
            iconst_0
            ireturn
        18: .line 156
      StackMap locals:
      StackMap stack:
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getDomain:()Ljava/util/List;
            ifnull 20
        19: .line 157
            iconst_0
            ireturn
        20: .line 159
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getRange:()Ljava/util/List;
            ifnull 23
        21: .line 160
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getRange:()Ljava/util/List;
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getRange:()Ljava/util/List;
            invokeinterface java.util.List.equals:(Ljava/lang/Object;)Z
            ifne 25
        22: .line 161
            iconst_0
            ireturn
        23: .line 163
      StackMap locals:
      StackMap stack:
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getRange:()Ljava/util/List;
            ifnull 25
        24: .line 164
            iconst_0
            ireturn
        25: .line 166
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getEncode:()Ljava/util/List;
            ifnull 28
        26: .line 167
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getEncode:()Ljava/util/List;
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getEncode:()Ljava/util/List;
            invokeinterface java.util.List.equals:(Ljava/lang/Object;)Z
            ifne 30
        27: .line 168
            iconst_0
            ireturn
        28: .line 170
      StackMap locals:
      StackMap stack:
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getEncode:()Ljava/util/List;
            ifnull 30
        29: .line 171
            iconst_0
            ireturn
        30: .line 173
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getCZero:()[F
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getCZero:()[F
            invokestatic java.util.Arrays.equals:([F[F)Z
            ifne 32
        31: .line 174
            iconst_0
            ireturn
        32: .line 176
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getCOne:()[F
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getCOne:()[F
            invokestatic java.util.Arrays.equals:([F[F)Z
            ifne 34
        33: .line 177
            iconst_0
            ireturn
        34: .line 179
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.pdfFunctions:Ljava/util/List;
            aload 1 /* obj */
            checkcast org.apache.fop.pdf.PDFFunction
            getfield org.apache.fop.pdf.PDFFunction.pdfFunctions:Ljava/util/List;
            invokeinterface java.util.List.equals:(Ljava/lang/Object;)Z
            ifne 36
        35: .line 180
            iconst_0
            ireturn
        36: .line 182
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getBounds:()Ljava/util/List;
            ifnull 39
        37: .line 183
            aload 0 /* this */
            getfield org.apache.fop.pdf.PDFFunction.function:Lorg/apache/fop/render/gradient/Function;
            invokevirtual org.apache.fop.render.gradient.Function.getBounds:()Ljava/util/List;
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getBounds:()Ljava/util/List;
            invokeinterface java.util.List.equals:(Ljava/lang/Object;)Z
            ifne 41
        38: .line 184
            iconst_0
            ireturn
        39: .line 186
      StackMap locals:
      StackMap stack:
            aload 2 /* func */
            invokevirtual org.apache.fop.render.gradient.Function.getBounds:()Ljava/util/List;
            ifnull 41
        40: .line 187
            iconst_0
            ireturn
        41: .line 189
      StackMap locals:
      StackMap stack:
            iconst_1
            ireturn
        end local 2 // org.apache.fop.render.gradient.Function func
        end local 1 // org.apache.fop.pdf.PDFObject obj
        end local 0 // org.apache.fop.pdf.PDFFunction this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   42     0  this  Lorg/apache/fop/pdf/PDFFunction;
            0   42     1   obj  Lorg/apache/fop/pdf/PDFObject;
            7   42     2  func  Lorg/apache/fop/render/gradient/Function;
    MethodParameters:
      Name  Flags
      obj   
}
SourceFile: "PDFFunction.java"
NestMembers:
  org.apache.fop.pdf.PDFFunction$1  org.apache.fop.pdf.PDFFunction$2
InnerClasses:
  org.apache.fop.pdf.PDFFunction$1
  org.apache.fop.pdf.PDFFunction$2
  public abstract SubFunctionRenderer = org.apache.fop.render.gradient.Function$SubFunctionRenderer of org.apache.fop.render.gradient.Function
  public abstract DoubleFormatter = org.apache.fop.render.gradient.GradientMaker$DoubleFormatter of org.apache.fop.render.gradient.GradientMaker