BASE64Decoder

Class Overview

This class implements a BASE64 Character decoder as specified in RFC1521. This RFC is part of the MIME specification which is published by the Internet Engineering Task Force (IETF). Unlike some other encoding schemes there is nothing in this encoding that tells the decoder where a buffer starts or stops, so to use it you will need to isolate your encoded data into a single chunk and then feed them this decoder. The simplest way to do that is to read all of the encoded data into a string and then use:

      byte    mydata[];
      BASE64Decoder base64 = new BASE64Decoder();

      mydata = base64.decodeBuffer(bufferString);
 

    "BASE64Decoder: Not enough bytes for an atom."
 

Summary

[Expand] Inherited Methods
From class sun.misc.CharacterDecoder abstract int bytesPerAtom() Return the number of bytes per atom of decoding abstract int bytesPerLine() Return the maximum number of bytes that can be encoded per line void decodeAtom(PushbackInputStream aStream, OutputStream bStream, int l) This method does an actual decode. void decodeBuffer(InputStream aStream, OutputStream bStream) Decode the text from the InputStream and write the decoded octets to the OutputStream. byte[] decodeBuffer(InputStream in) Decode the contents of the inputstream into a buffer. byte[] decodeBuffer(String inputString) Alternate decode interface that takes a String containing the encoded buffer and returns a byte array containing the data. void decodeBufferPrefix(PushbackInputStream aStream, OutputStream bStream) decode the beginning of the buffer, by default this is a NOP. void decodeBufferSuffix(PushbackInputStream aStream, OutputStream bStream) decode the buffer suffix, again by default it is a NOP. ByteBuffer decodeBufferToByteBuffer(InputStream in) Decode the contents of the inputStream into a ByteBuffer. ByteBuffer decodeBufferToByteBuffer(String inputString) Decode the contents of the String into a ByteBuffer. int decodeLinePrefix(PushbackInputStream aStream, OutputStream bStream) This method should return, if it knows, the number of bytes that will be decoded. void decodeLineSuffix(PushbackInputStream aStream, OutputStream bStream) This method post processes the line, if there are error detection or correction codes in a line, they are generally processed by this method. int readFully(InputStream in, byte[] buffer, int offset, int len) This method works around the bizarre semantics of BufferedInputStream's read method.
From class java.lang.Object Object clone() Creates and returns a copy of this object. boolean equals(Object obj) Indicates whether some other object is "equal to" this one. void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. final Class<?> getClass() Returns the runtime class of this Object. int hashCode() Returns a hash code value for the object. final void notify() Wakes up a single thread that is waiting on this object's monitor. final void notifyAll() Wakes up all threads that are waiting on this object's monitor. String toString() Returns a string representation of the object. final void wait() Causes the current thread to wait until another thread invokes the notify() method or the notifyAll() method for this object. final void wait(long timeout, int nanos) Causes the current thread to wait until another thread invokes the notify() method or the notifyAll() method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed. final void wait(long timeout) Causes the current thread to wait until either another thread invokes the notify() method or the notifyAll() method for this object, or a specified amount of time has elapsed.