https://tomcat.apache.org/: Tomcat Servlet Engine Core Classes and Standard implementations 
public class org.apache.catalina.util.DOMWriter
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.catalina.util.DOMWriter
  super_class: java.lang.Object
{
  private final java.io.PrintWriter out;
    descriptor: Ljava/io/PrintWriter;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>(java.io.Writer);
    descriptor: (Ljava/io/Writer;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // org.apache.catalina.util.DOMWriter this
        start local 1 // java.io.Writer writer
         0: .line 37
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 38
            aload 0 /* this */
            new java.io.PrintWriter
            dup
            aload 1 /* writer */
            invokespecial java.io.PrintWriter.<init>:(Ljava/io/Writer;)V
            putfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
         2: .line 39
            return
        end local 1 // java.io.Writer writer
        end local 0 // org.apache.catalina.util.DOMWriter this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    3     0    this  Lorg/apache/catalina/util/DOMWriter;
            0    3     1  writer  Ljava/io/Writer;
    MethodParameters:
        Name  Flags
      writer  

  public void print(org.w3c.dom.Node);
    descriptor: (Lorg/w3c/dom/Node;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=8, args_size=2
        start local 0 // org.apache.catalina.util.DOMWriter this
        start local 1 // org.w3c.dom.Node node
         0: .line 49
            aload 1 /* node */
            ifnonnull 2
         1: .line 50
            return
         2: .line 53
      StackMap locals:
      StackMap stack:
            aload 1 /* node */
            invokeinterface org.w3c.dom.Node.getNodeType:()S
            istore 2 /* type */
        start local 2 // int type
         3: .line 54
            iload 2 /* type */
            tableswitch { // 1 - 9
                    1: 7
                    2: 35
                    3: 26
                    4: 24
                    5: 22
                    6: 35
                    7: 28
                    8: 35
                    9: 4
              default: 35
          }
         4: .line 57
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            aload 1 /* node */
            checkcast org.w3c.dom.Document
            invokeinterface org.w3c.dom.Document.getDocumentElement:()Lorg/w3c/dom/Element;
            invokevirtual org.apache.catalina.util.DOMWriter.print:(Lorg/w3c/dom/Node;)V
         5: .line 58
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            invokevirtual java.io.PrintWriter.flush:()V
         6: .line 59
            goto 35
         7: .line 63
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            bipush 60
            invokevirtual java.io.PrintWriter.print:(C)V
         8: .line 64
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            aload 1 /* node */
            invokeinterface org.w3c.dom.Node.getLocalName:()Ljava/lang/String;
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
         9: .line 65
            aload 0 /* this */
            aload 1 /* node */
            invokeinterface org.w3c.dom.Node.getAttributes:()Lorg/w3c/dom/NamedNodeMap;
            invokevirtual org.apache.catalina.util.DOMWriter.sortAttributes:(Lorg/w3c/dom/NamedNodeMap;)[Lorg/w3c/dom/Attr;
            astore 3 /* attrs */
        start local 3 // org.w3c.dom.Attr[] attrs
        10: .line 66
            aload 3 /* attrs */
            dup
            astore 7
            arraylength
            istore 6
            iconst_0
            istore 5
            goto 18
      StackMap locals: org.apache.catalina.util.DOMWriter org.w3c.dom.Node int org.w3c.dom.Attr[] top int int org.w3c.dom.Attr[]
      StackMap stack:
        11: aload 7
            iload 5
            aaload
            astore 4 /* attr */
        start local 4 // org.w3c.dom.Attr attr
        12: .line 67
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            bipush 32
            invokevirtual java.io.PrintWriter.print:(C)V
        13: .line 68
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            aload 4 /* attr */
            invokeinterface org.w3c.dom.Attr.getLocalName:()Ljava/lang/String;
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        14: .line 70
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            ldc "=\""
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        15: .line 71
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            ldc ""
            iconst_1
            aload 4 /* attr */
            invokeinterface org.w3c.dom.Attr.getNodeValue:()Ljava/lang/String;
            invokestatic org.apache.tomcat.util.security.Escape.xml:(Ljava/lang/String;ZLjava/lang/String;)Ljava/lang/String;
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        16: .line 72
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            bipush 34
            invokevirtual java.io.PrintWriter.print:(C)V
        end local 4 // org.w3c.dom.Attr attr
        17: .line 66
            iinc 5 1
      StackMap locals:
      StackMap stack:
        18: iload 5
            iload 6
            if_icmplt 11
        19: .line 74
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            bipush 62
            invokevirtual java.io.PrintWriter.print:(C)V
        20: .line 75
            aload 0 /* this */
            aload 1 /* node */
            invokevirtual org.apache.catalina.util.DOMWriter.printChildren:(Lorg/w3c/dom/Node;)V
        21: .line 76
            goto 35
        end local 3 // org.w3c.dom.Attr[] attrs
        22: .line 80
      StackMap locals: org.apache.catalina.util.DOMWriter org.w3c.dom.Node int
      StackMap stack:
            aload 0 /* this */
            aload 1 /* node */
            invokevirtual org.apache.catalina.util.DOMWriter.printChildren:(Lorg/w3c/dom/Node;)V
        23: .line 81
            goto 35
        24: .line 85
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            ldc ""
            iconst_1
            aload 1 /* node */
            invokeinterface org.w3c.dom.Node.getNodeValue:()Ljava/lang/String;
            invokestatic org.apache.tomcat.util.security.Escape.xml:(Ljava/lang/String;ZLjava/lang/String;)Ljava/lang/String;
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        25: .line 86
            goto 35
        26: .line 90
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            ldc ""
            iconst_1
            aload 1 /* node */
            invokeinterface org.w3c.dom.Node.getNodeValue:()Ljava/lang/String;
            invokestatic org.apache.tomcat.util.security.Escape.xml:(Ljava/lang/String;ZLjava/lang/String;)Ljava/lang/String;
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        27: .line 91
            goto 35
        28: .line 95
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            ldc "<?"
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        29: .line 96
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            aload 1 /* node */
            invokeinterface org.w3c.dom.Node.getLocalName:()Ljava/lang/String;
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        30: .line 98
            aload 1 /* node */
            invokeinterface org.w3c.dom.Node.getNodeValue:()Ljava/lang/String;
            astore 4 /* data */
        start local 4 // java.lang.String data
        31: .line 99
            aload 4 /* data */
            ifnull 34
            aload 4 /* data */
            invokevirtual java.lang.String.length:()I
            ifle 34
        32: .line 100
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            bipush 32
            invokevirtual java.io.PrintWriter.print:(C)V
        33: .line 101
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            aload 4 /* data */
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        34: .line 103
      StackMap locals: org.apache.catalina.util.DOMWriter org.w3c.dom.Node int top java.lang.String
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            ldc "?>"
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        end local 4 // java.lang.String data
        35: .line 107
      StackMap locals: org.apache.catalina.util.DOMWriter org.w3c.dom.Node int
      StackMap stack:
            iload 2 /* type */
            iconst_1
            if_icmpne 39
        36: .line 108
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            ldc "</"
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        37: .line 109
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            aload 1 /* node */
            invokeinterface org.w3c.dom.Node.getLocalName:()Ljava/lang/String;
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        38: .line 110
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            bipush 62
            invokevirtual java.io.PrintWriter.print:(C)V
        39: .line 113
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.catalina.util.DOMWriter.out:Ljava/io/PrintWriter;
            invokevirtual java.io.PrintWriter.flush:()V
        40: .line 115
            return
        end local 2 // int type
        end local 1 // org.w3c.dom.Node node
        end local 0 // org.apache.catalina.util.DOMWriter this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0   41     0   this  Lorg/apache/catalina/util/DOMWriter;
            0   41     1   node  Lorg/w3c/dom/Node;
            3   41     2   type  I
           10   22     3  attrs  [Lorg/w3c/dom/Attr;
           12   17     4   attr  Lorg/w3c/dom/Attr;
           31   35     4   data  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      node  

  private void printChildren(org.w3c.dom.Node);
    descriptor: (Lorg/w3c/dom/Node;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=5, args_size=2
        start local 0 // org.apache.catalina.util.DOMWriter this
        start local 1 // org.w3c.dom.Node node
         0: .line 119
            aload 1 /* node */
            invokeinterface org.w3c.dom.Node.getChildNodes:()Lorg/w3c/dom/NodeList;
            astore 2 /* children */
        start local 2 // org.w3c.dom.NodeList children
         1: .line 120
            aload 2 /* children */
            ifnull 8
         2: .line 121
            aload 2 /* children */
            invokeinterface org.w3c.dom.NodeList.getLength:()I
            istore 3 /* len */
        start local 3 // int len
         3: .line 122
            iconst_0
            istore 4 /* i */
        start local 4 // int i
         4: goto 7
         5: .line 123
      StackMap locals: org.w3c.dom.NodeList int int
      StackMap stack:
            aload 0 /* this */
            aload 2 /* children */
            iload 4 /* i */
            invokeinterface org.w3c.dom.NodeList.item:(I)Lorg/w3c/dom/Node;
            invokevirtual org.apache.catalina.util.DOMWriter.print:(Lorg/w3c/dom/Node;)V
         6: .line 122
            iinc 4 /* i */ 1
      StackMap locals:
      StackMap stack:
         7: iload 4 /* i */
            iload 3 /* len */
            if_icmplt 5
        end local 4 // int i
        end local 3 // int len
         8: .line 126
      StackMap locals:
      StackMap stack:
            return
        end local 2 // org.w3c.dom.NodeList children
        end local 1 // org.w3c.dom.Node node
        end local 0 // org.apache.catalina.util.DOMWriter this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    9     0      this  Lorg/apache/catalina/util/DOMWriter;
            0    9     1      node  Lorg/w3c/dom/Node;
            1    9     2  children  Lorg/w3c/dom/NodeList;
            3    8     3       len  I
            4    8     4         i  I
    MethodParameters:
      Name  Flags
      node  

  private org.w3c.dom.Attr[] sortAttributes(org.w3c.dom.NamedNodeMap);
    descriptor: (Lorg/w3c/dom/NamedNodeMap;)[Lorg/w3c/dom/Attr;
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=4, locals=9, args_size=2
        start local 0 // org.apache.catalina.util.DOMWriter this
        start local 1 // org.w3c.dom.NamedNodeMap attrs
         0: .line 135
            aload 1 /* attrs */
            ifnonnull 2
         1: .line 136
            iconst_0
            anewarray org.w3c.dom.Attr
            areturn
         2: .line 139
      StackMap locals:
      StackMap stack:
            aload 1 /* attrs */
            invokeinterface org.w3c.dom.NamedNodeMap.getLength:()I
            istore 2 /* len */
        start local 2 // int len
         3: .line 140
            iload 2 /* len */
            anewarray org.w3c.dom.Attr
            astore 3 /* array */
        start local 3 // org.w3c.dom.Attr[] array
         4: .line 141
            iconst_0
            istore 4 /* i */
        start local 4 // int i
         5: goto 8
         6: .line 142
      StackMap locals: int org.w3c.dom.Attr[] int
      StackMap stack:
            aload 3 /* array */
            iload 4 /* i */
            aload 1 /* attrs */
            iload 4 /* i */
            invokeinterface org.w3c.dom.NamedNodeMap.item:(I)Lorg/w3c/dom/Node;
            checkcast org.w3c.dom.Attr
            aastore
         7: .line 141
            iinc 4 /* i */ 1
      StackMap locals:
      StackMap stack:
         8: iload 4 /* i */
            iload 2 /* len */
            if_icmplt 6
        end local 4 // int i
         9: .line 144
            iconst_0
            istore 4 /* i */
        start local 4 // int i
        10: goto 28
        11: .line 145
      StackMap locals:
      StackMap stack:
            aconst_null
            astore 5 /* name */
        start local 5 // java.lang.String name
        12: .line 146
            aload 3 /* array */
            iload 4 /* i */
            aaload
            invokeinterface org.w3c.dom.Attr.getLocalName:()Ljava/lang/String;
            astore 5 /* name */
        13: .line 147
            iload 4 /* i */
            istore 6 /* index */
        start local 6 // int index
        14: .line 148
            iload 4 /* i */
            iconst_1
            iadd
            istore 7 /* j */
        start local 7 // int j
        15: goto 22
        16: .line 149
      StackMap locals: java.lang.String int int
      StackMap stack:
            aconst_null
            astore 8 /* curName */
        start local 8 // java.lang.String curName
        17: .line 150
            aload 3 /* array */
            iload 7 /* j */
            aaload
            invokeinterface org.w3c.dom.Attr.getLocalName:()Ljava/lang/String;
            astore 8 /* curName */
        18: .line 151
            aload 8 /* curName */
            aload 5 /* name */
            invokevirtual java.lang.String.compareTo:(Ljava/lang/String;)I
            ifge 21
        19: .line 152
            aload 8 /* curName */
            astore 5 /* name */
        20: .line 153
            iload 7 /* j */
            istore 6 /* index */
        end local 8 // java.lang.String curName
        21: .line 148
      StackMap locals:
      StackMap stack:
            iinc 7 /* j */ 1
      StackMap locals:
      StackMap stack:
        22: iload 7 /* j */
            iload 2 /* len */
            if_icmplt 16
        end local 7 // int j
        23: .line 156
            iload 6 /* index */
            iload 4 /* i */
            if_icmpeq 27
        24: .line 157
            aload 3 /* array */
            iload 4 /* i */
            aaload
            astore 7 /* temp */
        start local 7 // org.w3c.dom.Attr temp
        25: .line 158
            aload 3 /* array */
            iload 4 /* i */
            aload 3 /* array */
            iload 6 /* index */
            aaload
            aastore
        26: .line 159
            aload 3 /* array */
            iload 6 /* index */
            aload 7 /* temp */
            aastore
        end local 7 // org.w3c.dom.Attr temp
        end local 6 // int index
        end local 5 // java.lang.String name
        27: .line 144
      StackMap locals:
      StackMap stack:
            iinc 4 /* i */ 1
      StackMap locals:
      StackMap stack:
        28: iload 4 /* i */
            iload 2 /* len */
            iconst_1
            isub
            if_icmplt 11
        end local 4 // int i
        29: .line 163
            aload 3 /* array */
            areturn
        end local 3 // org.w3c.dom.Attr[] array
        end local 2 // int len
        end local 1 // org.w3c.dom.NamedNodeMap attrs
        end local 0 // org.apache.catalina.util.DOMWriter this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0   30     0     this  Lorg/apache/catalina/util/DOMWriter;
            0   30     1    attrs  Lorg/w3c/dom/NamedNodeMap;
            3   30     2      len  I
            4   30     3    array  [Lorg/w3c/dom/Attr;
            5    9     4        i  I
           10   29     4        i  I
           12   27     5     name  Ljava/lang/String;
           14   27     6    index  I
           15   23     7        j  I
           17   21     8  curName  Ljava/lang/String;
           25   27     7     temp  Lorg/w3c/dom/Attr;
    MethodParameters:
       Name  Flags
      attrs  
}
SourceFile: "DOMWriter.java"