Package org.apache.xmlgraphics.util.io
Class Base64EncodeStream
- java.lang.Object
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- java.io.OutputStream
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- org.apache.xmlgraphics.util.io.Base64EncodeStream
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- All Implemented Interfaces:
java.io.Closeable
,java.io.Flushable
,java.lang.AutoCloseable
public class Base64EncodeStream extends java.io.OutputStream
This class implements a Base64 Character encoder as specified in RFC1113. Unlike some other encoding schemes there is nothing in this encoding that indicates where a buffer starts or ends. This means that the encoded text will simply start with the first line of encoded text and end with the last line of encoded text.- Version:
- $Id$ Originally authored by Thomas DeWeese, Vincent Hardy, and Chuck McManis.
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Field Summary
Fields Modifier and Type Field Description (package private) byte[]
atom
(package private) int
atomLen
(package private) boolean
closeOutOnClose
(package private) byte[]
encodeBuf
(package private) int
lineLen
(package private) java.io.PrintStream
out
private static byte[]
PEM_ARRAY
This array maps the 6 bit values to their characters
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Constructor Summary
Constructors Constructor Description Base64EncodeStream(java.io.OutputStream out)
Base64EncodeStream(java.io.OutputStream out, boolean closeOutOnClose)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
close()
(package private) void
encodeAtom()
enocodeAtom - Take three bytes of input and encode it as 4 printable characters.(package private) void
encodeFromArray(byte[] data, int offset, int len)
enocodeAtom - Take three bytes of input and encode it as 4 printable characters.void
flush()
This can't really flush out output since that may generate '=' chars which would indicate the end of the stream.void
write(byte[] data)
void
write(byte[] data, int off, int len)
void
write(int b)
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Method Detail
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close
public void close() throws java.io.IOException
- Specified by:
close
in interfacejava.lang.AutoCloseable
- Specified by:
close
in interfacejava.io.Closeable
- Overrides:
close
in classjava.io.OutputStream
- Throws:
java.io.IOException
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flush
public void flush() throws java.io.IOException
This can't really flush out output since that may generate '=' chars which would indicate the end of the stream. Instead we flush out. You can only be sure all output is writen by closing this stream.- Specified by:
flush
in interfacejava.io.Flushable
- Overrides:
flush
in classjava.io.OutputStream
- Throws:
java.io.IOException
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write
public void write(int b) throws java.io.IOException
- Specified by:
write
in classjava.io.OutputStream
- Throws:
java.io.IOException
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write
public void write(byte[] data) throws java.io.IOException
- Overrides:
write
in classjava.io.OutputStream
- Throws:
java.io.IOException
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write
public void write(byte[] data, int off, int len) throws java.io.IOException
- Overrides:
write
in classjava.io.OutputStream
- Throws:
java.io.IOException
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encodeAtom
void encodeAtom() throws java.io.IOException
enocodeAtom - Take three bytes of input and encode it as 4 printable characters. Note that if the length in len is less than three is encodes either one or two '=' signs to indicate padding characters.- Throws:
java.io.IOException
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encodeFromArray
void encodeFromArray(byte[] data, int offset, int len) throws java.io.IOException
enocodeAtom - Take three bytes of input and encode it as 4 printable characters. Note that if the length in len is less than three is encodes either one or two '=' signs to indicate padding characters.- Throws:
java.io.IOException
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