File	Doc	Category	Size	Date	Package
DigestOutputStream.java	API Doc	Android 1.5 API	4455	Wed May 06 22:41:06 BST 2009	java.security

DigestOutputStream

• java.lang.Object
  • java.io.OutputStream
    • java.io.FilterOutputStream

Fields Summary
protected MessageDigest	digest The message digest for this stream.
private boolean	isOn

Constructors Summary
public DigestOutputStream(OutputStream stream, MessageDigest digest) Constructs a new instance of this {@code DigestOutputStream}, using the given {@code stream} and the {@code digest}. param stream the output stream. param digest the message digest. since Android 1.0 super(stream); this.digest = digest;

Methods Summary
public java.security.MessageDigest	getMessageDigest() Returns the message digest for this stream. return the message digest for this stream. since Android 1.0 return digest;
public void	on(boolean on) Enables or disables the digest function (default is on). param on {@code true} if the digest should be computed, {@code false} otherwise. since Android 1.0 isOn = on;
public void	setMessageDigest(java.security.MessageDigest digest) Sets the message digest which this stream will use. param digest the message digest which this stream will use. since Android 1.0 this.digest = digest;
public java.lang.String	toString() Returns a string containing a concise, human-readable description of this {@code DigestOutputStream} including the digest. return a printable representation for this {@code DigestOutputStream}. since Android 1.0 return super.toString() + ", " + digest.toString() + //$NON-NLS-1$ (isOn ? ", is on" : ", is off"); //$NON-NLS-1$ //$NON-NLS-2$
public void	write(int b) Writes the specified {@code int} to the stream. Updates the digest if this function is {@link #on(boolean)}. param b the byte to be written. throws IOException if writing to the stream causes a {@code IOException} since Android 1.0 // update digest only if digest functionality is on if (isOn) { digest.update((byte)b); } // write the byte out.write(b);
public void	write(byte[] b, int off, int len) Writes {@code len} bytes into the stream, starting from the specified offset. Updates the digest if this function is {@link #on(boolean)}. param b the buffer to write to. param off the index of the first byte in {@code b} to write. param len the number of bytes in {@code b} to write. throws IOException if writing to the stream causes an {@code IOException}. since Android 1.0 // update digest only if digest functionality is on if (isOn) { digest.update(b, off, len); } // write len bytes out.write(b, off, len);