http://xmlgraphics.apache.org/commons/: Apache XML Graphics Commons is a library that consists of several reusable components used by Apache Batik and Apache FOP. Many of these components can easily be used separately outside the domains of SVG and XSL-FO. (Apache Software Foundation) 
public final class org.apache.xmlgraphics.xmp.XMPPacketParser
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: org.apache.xmlgraphics.xmp.XMPPacketParser
  super_class: java.lang.Object
{
  private static final byte[] PACKET_HEADER;
    descriptor: [B
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static final byte[] PACKET_HEADER_END;
    descriptor: [B
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static final byte[] PACKET_TRAILER;
    descriptor: [B
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=0, args_size=0
         0: .line 52
            ldc "<?xpacket begin="
            ldc "US-ASCII"
            invokevirtual java.lang.String.getBytes:(Ljava/lang/String;)[B
            putstatic org.apache.xmlgraphics.xmp.XMPPacketParser.PACKET_HEADER:[B
         1: .line 53
            ldc "?>"
            ldc "US-ASCII"
            invokevirtual java.lang.String.getBytes:(Ljava/lang/String;)[B
            putstatic org.apache.xmlgraphics.xmp.XMPPacketParser.PACKET_HEADER_END:[B
         2: .line 54
            ldc "<?xpacket"
            ldc "US-ASCII"
            invokevirtual java.lang.String.getBytes:(Ljava/lang/String;)[B
            putstatic org.apache.xmlgraphics.xmp.XMPPacketParser.PACKET_TRAILER:[B
         3: .line 55
            goto 6
      StackMap locals:
      StackMap stack: java.io.UnsupportedEncodingException
         4: pop
         5: .line 56
            new java.lang.RuntimeException
            dup
            ldc "Incompatible JVM! US-ASCII encoding not supported."
            invokespecial java.lang.RuntimeException.<init>:(Ljava/lang/String;)V
            athrow
         6: .line 58
      StackMap locals:
      StackMap stack:
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature
      Exception table:
        from    to  target  type
           0     3       4  Class java.io.UnsupportedEncodingException

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.xmlgraphics.xmp.XMPPacketParser this
         0: .line 43
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 44
            return
        end local 0 // org.apache.xmlgraphics.xmp.XMPPacketParser this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/xmlgraphics/xmp/XMPPacketParser;

  public static org.apache.xmlgraphics.xmp.Metadata parse(java.io.InputStream);
    descriptor: (Ljava/io/InputStream;)Lorg/apache/xmlgraphics/xmp/Metadata;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=5, args_size=1
        start local 0 // java.io.InputStream in
         0: .line 71
            aload 0 /* in */
            invokevirtual java.io.InputStream.markSupported:()Z
            ifne 2
         1: .line 72
            new java.io.BufferedInputStream
            dup
            aload 0 /* in */
            invokespecial java.io.BufferedInputStream.<init>:(Ljava/io/InputStream;)V
            astore 0 /* in */
         2: .line 74
      StackMap locals:
      StackMap stack:
            aload 0 /* in */
            getstatic org.apache.xmlgraphics.xmp.XMPPacketParser.PACKET_HEADER:[B
            invokestatic org.apache.xmlgraphics.xmp.XMPPacketParser.skipAfter:(Ljava/io/InputStream;[B)Z
            istore 1 /* foundXMP */
        start local 1 // boolean foundXMP
         3: .line 75
            iload 1 /* foundXMP */
            ifne 5
         4: .line 76
            aconst_null
            areturn
         5: .line 79
      StackMap locals: int
      StackMap stack:
            aload 0 /* in */
            getstatic org.apache.xmlgraphics.xmp.XMPPacketParser.PACKET_HEADER_END:[B
            invokestatic org.apache.xmlgraphics.xmp.XMPPacketParser.skipAfter:(Ljava/io/InputStream;[B)Z
            ifne 7
         6: .line 80
            new java.io.IOException
            dup
            ldc "Invalid XMP packet header!"
            invokespecial java.io.IOException.<init>:(Ljava/lang/String;)V
            athrow
         7: .line 82
      StackMap locals:
      StackMap stack:
            aconst_null
            astore 2 /* baout */
        start local 2 // org.apache.commons.io.output.ByteArrayOutputStream baout
         8: .line 87
            new org.apache.commons.io.output.ByteArrayOutputStream
            dup
            invokespecial org.apache.commons.io.output.ByteArrayOutputStream.<init>:()V
            astore 2 /* baout */
         9: .line 89
            aload 0 /* in */
            getstatic org.apache.xmlgraphics.xmp.XMPPacketParser.PACKET_TRAILER:[B
            aload 2 /* baout */
            invokestatic org.apache.xmlgraphics.xmp.XMPPacketParser.skipAfter:(Ljava/io/InputStream;[BLjava/io/OutputStream;)Z
            ifne 11
        10: .line 90
            new java.io.IOException
            dup
            ldc "XMP packet not properly terminated!"
            invokespecial java.io.IOException.<init>:(Ljava/lang/String;)V
            athrow
        11: .line 93
      StackMap locals: org.apache.commons.io.output.ByteArrayOutputStream
      StackMap stack:
            new javax.xml.transform.stream.StreamSource
            dup
            new java.io.ByteArrayInputStream
            dup
            aload 2 /* baout */
            invokevirtual org.apache.commons.io.output.ByteArrayOutputStream.toByteArray:()[B
            invokespecial java.io.ByteArrayInputStream.<init>:([B)V
            invokespecial javax.xml.transform.stream.StreamSource.<init>:(Ljava/io/InputStream;)V
        12: .line 92
            invokestatic org.apache.xmlgraphics.xmp.XMPParser.parseXMP:(Ljavax/xml/transform/Source;)Lorg/apache/xmlgraphics/xmp/Metadata;
            astore 3 /* metadata */
        start local 3 // org.apache.xmlgraphics.xmp.Metadata metadata
        13: .line 94
            goto 17
        end local 3 // org.apache.xmlgraphics.xmp.Metadata metadata
      StackMap locals:
      StackMap stack: java.lang.Throwable
        14: astore 4
        15: .line 95
            aload 2 /* baout */
            invokestatic org.apache.commons.io.IOUtils.closeQuietly:(Ljava/io/OutputStream;)V
        16: .line 96
            aload 4
            athrow
        start local 3 // org.apache.xmlgraphics.xmp.Metadata metadata
        17: .line 95
      StackMap locals: org.apache.xmlgraphics.xmp.Metadata
      StackMap stack:
            aload 2 /* baout */
            invokestatic org.apache.commons.io.IOUtils.closeQuietly:(Ljava/io/OutputStream;)V
        18: .line 97
            aload 3 /* metadata */
            areturn
        end local 3 // org.apache.xmlgraphics.xmp.Metadata metadata
        end local 2 // org.apache.commons.io.output.ByteArrayOutputStream baout
        end local 1 // boolean foundXMP
        end local 0 // java.io.InputStream in
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   19     0        in  Ljava/io/InputStream;
            3   19     1  foundXMP  Z
            8   19     2     baout  Lorg/apache/commons/io/output/ByteArrayOutputStream;
           13   14     3  metadata  Lorg/apache/xmlgraphics/xmp/Metadata;
           17   19     3  metadata  Lorg/apache/xmlgraphics/xmp/Metadata;
      Exception table:
        from    to  target  type
           8    14      14  any
    Exceptions:
      throws java.io.IOException, javax.xml.transform.TransformerException
    MethodParameters:
      Name  Flags
      in    

  private static boolean skipAfter(java.io.InputStream, byte[]);
    descriptor: (Ljava/io/InputStream;[B)Z
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // java.io.InputStream in
        start local 1 // byte[] match
         0: .line 101
            aload 0 /* in */
            aload 1 /* match */
            aconst_null
            invokestatic org.apache.xmlgraphics.xmp.XMPPacketParser.skipAfter:(Ljava/io/InputStream;[BLjava/io/OutputStream;)Z
            ireturn
        end local 1 // byte[] match
        end local 0 // java.io.InputStream in
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0     in  Ljava/io/InputStream;
            0    1     1  match  [B
    Exceptions:
      throws java.io.IOException
    MethodParameters:
       Name  Flags
      in     
      match  

  private static boolean skipAfter(java.io.InputStream, byte[], java.io.OutputStream);
    descriptor: (Ljava/io/InputStream;[BLjava/io/OutputStream;)Z
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=4, locals=6, args_size=3
        start local 0 // java.io.InputStream in
        start local 1 // byte[] match
        start local 2 // java.io.OutputStream out
         0: .line 106
            iconst_0
            istore 3 /* found */
        start local 3 // int found
         1: .line 107
            aload 1 /* match */
            arraylength
            istore 4 /* len */
        start local 4 // int len
         2: .line 109
            goto 12
        start local 5 // int b
         3: .line 110
      StackMap locals: int int int
      StackMap stack:
            iload 5 /* b */
            aload 1 /* match */
            iload 3 /* found */
            baload
            if_icmpne 7
         4: .line 111
            iinc 3 /* found */ 1
         5: .line 112
            iload 3 /* found */
            iload 4 /* len */
            if_icmpne 12
         6: .line 113
            iconst_1
            ireturn
         7: .line 116
      StackMap locals:
      StackMap stack:
            aload 2 /* out */
            ifnull 11
         8: .line 117
            iload 3 /* found */
            ifle 10
         9: .line 118
            aload 2 /* out */
            aload 1 /* match */
            iconst_0
            iload 3 /* found */
            invokevirtual java.io.OutputStream.write:([BII)V
        10: .line 120
      StackMap locals:
      StackMap stack:
            aload 2 /* out */
            iload 5 /* b */
            invokevirtual java.io.OutputStream.write:(I)V
        11: .line 122
      StackMap locals:
      StackMap stack:
            iconst_0
            istore 3 /* found */
        end local 5 // int b
        12: .line 109
      StackMap locals:
      StackMap stack:
            aload 0 /* in */
            invokevirtual java.io.InputStream.read:()I
            dup
            istore 5 /* b */
        start local 5 // int b
        13: ifge 3
        14: .line 125
            iconst_0
            ireturn
        end local 5 // int b
        end local 4 // int len
        end local 3 // int found
        end local 2 // java.io.OutputStream out
        end local 1 // byte[] match
        end local 0 // java.io.InputStream in
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0   15     0     in  Ljava/io/InputStream;
            0   15     1  match  [B
            0   15     2    out  Ljava/io/OutputStream;
            1   15     3  found  I
            2   15     4    len  I
            3   12     5      b  I
           13   15     5      b  I
    Exceptions:
      throws java.io.IOException
    MethodParameters:
       Name  Flags
      in     
      match  
      out    
}
SourceFile: "XMPPacketParser.java"