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.layoutmgr.SpaceElement extends org.apache.fop.layoutmgr.UnresolvedListElementWithLength
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.fop.layoutmgr.SpaceElement
  super_class: org.apache.fop.layoutmgr.UnresolvedListElementWithLength
{
  private int precedence;
    descriptor: I
    flags: (0x0002) ACC_PRIVATE

  public void <init>(org.apache.fop.layoutmgr.Position, org.apache.fop.fo.properties.SpaceProperty, org.apache.fop.layoutmgr.RelSide, boolean, boolean, org.apache.fop.datatypes.PercentBaseContext);
    descriptor: (Lorg/apache/fop/layoutmgr/Position;Lorg/apache/fop/fo/properties/SpaceProperty;Lorg/apache/fop/layoutmgr/RelSide;ZZLorg/apache/fop/datatypes/PercentBaseContext;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=7, locals=8, args_size=7
        start local 0 // org.apache.fop.layoutmgr.SpaceElement this
        start local 1 // org.apache.fop.layoutmgr.Position position
        start local 2 // org.apache.fop.fo.properties.SpaceProperty space
        start local 3 // org.apache.fop.layoutmgr.RelSide side
        start local 4 // boolean isFirst
        start local 5 // boolean isLast
        start local 6 // org.apache.fop.datatypes.PercentBaseContext context
         0: .line 45
            aload 0 /* this */
            aload 1 /* position */
            aload 2 /* space */
            invokevirtual org.apache.fop.fo.properties.SpaceProperty.getSpace:()Lorg/apache/fop/fo/properties/SpaceProperty;
            invokevirtual org.apache.fop.fo.properties.SpaceProperty.getLengthRange:()Lorg/apache/fop/fo/properties/LengthRangeProperty;
            aload 6 /* context */
            invokevirtual org.apache.fop.fo.properties.LengthRangeProperty.toMinOptMax:(Lorg/apache/fop/datatypes/PercentBaseContext;)Lorg/apache/fop/traits/MinOptMax;
            aload 3 /* side */
         1: .line 46
            aload 2 /* space */
            invokevirtual org.apache.fop.fo.properties.SpaceProperty.isDiscard:()Z
            iload 4 /* isFirst */
            iload 5 /* isLast */
            invokespecial org.apache.fop.layoutmgr.UnresolvedListElementWithLength.<init>:(Lorg/apache/fop/layoutmgr/Position;Lorg/apache/fop/traits/MinOptMax;Lorg/apache/fop/layoutmgr/RelSide;ZZZ)V
         2: .line 47
            aload 2 /* space */
            invokevirtual org.apache.fop.fo.properties.SpaceProperty.getSpace:()Lorg/apache/fop/fo/properties/SpaceProperty;
            invokevirtual org.apache.fop.fo.properties.SpaceProperty.getPrecedence:()Lorg/apache/fop/fo/properties/Property;
            invokevirtual org.apache.fop.fo.properties.Property.getEnum:()I
            istore 7 /* en */
        start local 7 // int en
         3: .line 48
            iload 7 /* en */
            bipush 53
            if_icmpne 6
         4: .line 49
            aload 0 /* this */
            ldc 2147483647
            putfield org.apache.fop.layoutmgr.SpaceElement.precedence:I
         5: .line 50
            goto 7
         6: .line 51
      StackMap locals: org.apache.fop.layoutmgr.SpaceElement org.apache.fop.layoutmgr.Position org.apache.fop.fo.properties.SpaceProperty org.apache.fop.layoutmgr.RelSide int int org.apache.fop.datatypes.PercentBaseContext int
      StackMap stack:
            aload 0 /* this */
            aload 2 /* space */
            invokevirtual org.apache.fop.fo.properties.SpaceProperty.getSpace:()Lorg/apache/fop/fo/properties/SpaceProperty;
            invokevirtual org.apache.fop.fo.properties.SpaceProperty.getPrecedence:()Lorg/apache/fop/fo/properties/Property;
            invokevirtual org.apache.fop.fo.properties.Property.getNumber:()Ljava/lang/Number;
            invokevirtual java.lang.Number.intValue:()I
            putfield org.apache.fop.layoutmgr.SpaceElement.precedence:I
         7: .line 53
      StackMap locals:
      StackMap stack:
            return
        end local 7 // int en
        end local 6 // org.apache.fop.datatypes.PercentBaseContext context
        end local 5 // boolean isLast
        end local 4 // boolean isFirst
        end local 3 // org.apache.fop.layoutmgr.RelSide side
        end local 2 // org.apache.fop.fo.properties.SpaceProperty space
        end local 1 // org.apache.fop.layoutmgr.Position position
        end local 0 // org.apache.fop.layoutmgr.SpaceElement this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    8     0      this  Lorg/apache/fop/layoutmgr/SpaceElement;
            0    8     1  position  Lorg/apache/fop/layoutmgr/Position;
            0    8     2     space  Lorg/apache/fop/fo/properties/SpaceProperty;
            0    8     3      side  Lorg/apache/fop/layoutmgr/RelSide;
            0    8     4   isFirst  Z
            0    8     5    isLast  Z
            0    8     6   context  Lorg/apache/fop/datatypes/PercentBaseContext;
            3    8     7        en  I
    MethodParameters:
          Name  Flags
      position  
      space     
      side      
      isFirst   
      isLast    
      context   

  public boolean isForcing();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.apache.fop.layoutmgr.SpaceElement this
         0: .line 57
            aload 0 /* this */
            getfield org.apache.fop.layoutmgr.SpaceElement.precedence:I
            ldc 2147483647
            if_icmpne 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 0 // org.apache.fop.layoutmgr.SpaceElement this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/fop/layoutmgr/SpaceElement;

  public int getPrecedence();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.fop.layoutmgr.SpaceElement this
         0: .line 62
            aload 0 /* this */
            getfield org.apache.fop.layoutmgr.SpaceElement.precedence:I
            ireturn
        end local 0 // org.apache.fop.layoutmgr.SpaceElement this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/fop/layoutmgr/SpaceElement;

  public void notifyLayoutManager(org.apache.fop.traits.MinOptMax);
    descriptor: (Lorg/apache/fop/traits/MinOptMax;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=2
        start local 0 // org.apache.fop.layoutmgr.SpaceElement this
        start local 1 // org.apache.fop.traits.MinOptMax effectiveLength
         0: .line 67
            aload 0 /* this */
            invokevirtual org.apache.fop.layoutmgr.SpaceElement.getOriginatingLayoutManager:()Lorg/apache/fop/layoutmgr/LayoutManager;
            astore 2 /* lm */
        start local 2 // org.apache.fop.layoutmgr.LayoutManager lm
         1: .line 68
            aload 2 /* lm */
            instanceof org.apache.fop.layoutmgr.ConditionalElementListener
            ifeq 6
         2: .line 69
            aload 2 /* lm */
            checkcast org.apache.fop.layoutmgr.ConditionalElementListener
         3: .line 70
            aload 0 /* this */
            invokevirtual org.apache.fop.layoutmgr.SpaceElement.getSide:()Lorg/apache/fop/layoutmgr/RelSide;
            aload 1 /* effectiveLength */
         4: .line 69
            invokeinterface org.apache.fop.layoutmgr.ConditionalElementListener.notifySpace:(Lorg/apache/fop/layoutmgr/RelSide;Lorg/apache/fop/traits/MinOptMax;)V
         5: .line 71
            goto 9
         6: .line 72
      StackMap locals: org.apache.fop.layoutmgr.LayoutManager
      StackMap stack:
            getstatic org.apache.fop.layoutmgr.SpaceElement.log:Lorg/apache/commons/logging/Log;
            new java.lang.StringBuilder
            dup
            ldc "Cannot notify LM. It does not implement ConditionalElementListener:"
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
         7: .line 73
            aload 2 /* lm */
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
         8: .line 72
            invokeinterface org.apache.commons.logging.Log.warn:(Ljava/lang/Object;)V
         9: .line 75
      StackMap locals:
      StackMap stack:
            return
        end local 2 // org.apache.fop.layoutmgr.LayoutManager lm
        end local 1 // org.apache.fop.traits.MinOptMax effectiveLength
        end local 0 // org.apache.fop.layoutmgr.SpaceElement this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0   10     0             this  Lorg/apache/fop/layoutmgr/SpaceElement;
            0   10     1  effectiveLength  Lorg/apache/fop/traits/MinOptMax;
            1   10     2               lm  Lorg/apache/fop/layoutmgr/LayoutManager;
    MethodParameters:
                 Name  Flags
      effectiveLength  

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=1
        start local 0 // org.apache.fop.layoutmgr.SpaceElement this
         0: .line 79
            new java.lang.StringBuffer
            dup
            ldc "Space["
            invokespecial java.lang.StringBuffer.<init>:(Ljava/lang/String;)V
            astore 1 /* sb */
        start local 1 // java.lang.StringBuffer sb
         1: .line 80
            aload 1 /* sb */
            aload 0 /* this */
            invokespecial org.apache.fop.layoutmgr.UnresolvedListElementWithLength.toString:()Ljava/lang/String;
            invokevirtual java.lang.StringBuffer.append:(Ljava/lang/String;)Ljava/lang/StringBuffer;
            pop
         2: .line 81
            aload 1 /* sb */
            ldc ", precedence="
            invokevirtual java.lang.StringBuffer.append:(Ljava/lang/String;)Ljava/lang/StringBuffer;
            pop
         3: .line 82
            aload 0 /* this */
            invokevirtual org.apache.fop.layoutmgr.SpaceElement.isForcing:()Z
            ifeq 6
         4: .line 83
            aload 1 /* sb */
            ldc "forcing"
            invokevirtual java.lang.StringBuffer.append:(Ljava/lang/String;)Ljava/lang/StringBuffer;
            pop
         5: .line 84
            goto 7
         6: .line 85
      StackMap locals: java.lang.StringBuffer
      StackMap stack:
            aload 1 /* sb */
            aload 0 /* this */
            invokevirtual org.apache.fop.layoutmgr.SpaceElement.getPrecedence:()I
            invokevirtual java.lang.StringBuffer.append:(I)Ljava/lang/StringBuffer;
            pop
         7: .line 87
      StackMap locals:
      StackMap stack:
            aload 1 /* sb */
            ldc "]"
            invokevirtual java.lang.StringBuffer.append:(Ljava/lang/String;)Ljava/lang/StringBuffer;
            pop
         8: .line 88
            aload 1 /* sb */
            invokevirtual java.lang.StringBuffer.toString:()Ljava/lang/String;
            areturn
        end local 1 // java.lang.StringBuffer sb
        end local 0 // org.apache.fop.layoutmgr.SpaceElement this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    9     0  this  Lorg/apache/fop/layoutmgr/SpaceElement;
            1    9     1    sb  Ljava/lang/StringBuffer;
}
SourceFile: "SpaceElement.java"