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org.apache.derby.impl.drda

public Class ReEncodedInputStream

extends InputStream
Class Inheritance
Imports
java.io.ByteArrayInputStream, .ByteArrayOutputStream, .IOException, .InputStream, .OutputStreamWriter, .Reader
ReEncodedInputStream passes stream from Reader, which is stream of decoded style, to user of this subclass of InputStream, which is stream of encoded style. The encoding of stream passed to user is limited to UTF8. This class will be used to pass stream, which is served as a Reader, as a InputStream of a arbitrary encoding.

Nested and Inner Type Summary

Modifier and TypeClass and Description
private static class
ReEncodedInputStream.PublicBufferOutputStream

Field Summary

Modifier and TypeField and Description
private static final int
BUFFERED_CHAR_LEN

private char[]
decodedBuffer_

private ByteArrayInputStream
encodedInputStream_

private ReEncodedInputStream.PublicBufferOutputStream
encodedOutputStream_

private OutputStreamWriter
encodedStreamWriter_

private Reader
reader_

Constructor Summary

AccessConstructor and Description
public
ReEncodedInputStream(Reader reader)

Method Summary

Modifier and TypeMethod and Description
public int
available()

Overrides java.io.InputStream.available.

Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking, which may be 0, or 0 when end of stream is detected.
public void
close()

Overrides java.io.InputStream.close.

Implements java.io.Closeable.close.

Closes this input stream and releases any system resources associated with the stream.
protected void
finalize()

Overrides java.lang.Object.finalize.

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
public int
read()

Implements abstract java.io.InputStream.read.

Reads the next byte of data from the input stream.
private ByteArrayInputStream
reEncode(Reader reader)

Inherited from java.io.InputStream:
markmarkSupportednullInputStreamreadreadreadAllBytesreadNBytesreadNBytesresetskipskipNBytestransferTo

Field Detail

BUFFERED_CHAR_LENback to summary
private static final int BUFFERED_CHAR_LEN
decodedBuffer_back to summary
private char[] decodedBuffer_
encodedInputStream_back to summary
private ByteArrayInputStream encodedInputStream_
encodedOutputStream_back to summary
private ReEncodedInputStream.PublicBufferOutputStream encodedOutputStream_
encodedStreamWriter_back to summary
private OutputStreamWriter encodedStreamWriter_
reader_back to summary
private Reader reader_

Constructor Detail

ReEncodedInputStreamback to summary
public ReEncodedInputStream(Reader reader) throws IOException

Method Detail

availableback to summary
public int available() throws IOException

Overrides java.io.InputStream.available.

Doc from java.io.InputStream.available.

Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking, which may be 0, or 0 when end of stream is detected. The read might be on the same thread or another thread. A single read or skip of this many bytes will not block, but may read or skip fewer bytes.

Note that while some implementations of InputStream will return the total number of bytes in the stream, many will not. It is never correct to use the return value of this method to allocate a buffer intended to hold all data in this stream.

A subclass's implementation of this method may choose to throw an IOException if this input stream has been closed by invoking the close() method.

Returns:int

an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking or 0 when it reaches the end of the input stream.

Exceptions
IOException:
if an I/O error occurs.
closeback to summary
public void close() throws IOException

Overrides java.io.InputStream.close.

Implements java.io.Closeable.close.

Doc from java.io.InputStream.close.

Closes this input stream and releases any system resources associated with the stream.

Exceptions
IOException:
if an I/O error occurs.
finalizeback to summary
protected void finalize() throws IOException

Overrides java.lang.Object.finalize.

Doc from java.lang.Object.finalize.

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. A subclass overrides the finalize method to dispose of system resources or to perform other cleanup.

When running in a Java virtual machine in which finalization has been disabled or removed, the garbage collector will never call finalize(). In a Java virtual machine in which finalization is enabled, the garbage collector might call finalize only after an indefinite delay.

The general contract of finalize is that it is invoked if and when the Java virtual machine has determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, except as a result of an action taken by the finalization of some other object or class which is ready to be finalized. The finalize method may take any action, including making this object available again to other threads; the usual purpose of finalize, however, is to perform cleanup actions before the object is irrevocably discarded. For example, the finalize method for an object that represents an input/output connection might perform explicit I/O transactions to break the connection before the object is permanently discarded.

The finalize method of class Object performs no special action; it simply returns normally. Subclasses of Object may override this definition.

The Java programming language does not guarantee which thread will invoke the finalize method for any given object. It is guaranteed, however, that the thread that invokes finalize will not be holding any user-visible synchronization locks when finalize is invoked. If an uncaught exception is thrown by the finalize method, the exception is ignored and finalization of that object terminates.

After the finalize method has been invoked for an object, no further action is taken until the Java virtual machine has again determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, including possible actions by other objects or classes which are ready to be finalized, at which point the object may be discarded.

The finalize method is never invoked more than once by a Java virtual machine for any given object.

Any exception thrown by the finalize method causes the finalization of this object to be halted, but is otherwise ignored.

Annotations
@SuppressWarnings:deprecation, removal
readback to summary
public int read() throws IOException

Implements abstract java.io.InputStream.read.

Doc from java.io.InputStream.read.

Reads the next byte of data from the input stream. The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.

Returns:int

the next byte of data, or -1 if the end of the stream is reached.

Exceptions
IOException:
if an I/O error occurs.
reEncodeback to summary
private ByteArrayInputStream reEncode(Reader reader) throws IOException
org.apache.derby.impl.drda back to summary

private Class ReEncodedInputStream.PublicBufferOutputStream

extends ByteArrayOutputStream
Class Inheritance

Field Summary

Inherited from java.io.ByteArrayOutputStream:
bufcount

Constructor Summary

AccessConstructor and Description
pack-priv
PublicBufferOutputStream(int size)

Method Summary

Modifier and TypeMethod and Description
public byte[]
getBuffer()

Inherited from java.io.ByteArrayOutputStream:
closeresetsizetoByteArraytoStringtoStringtoStringtoStringwritewritewriteByteswriteTo

Constructor Detail

PublicBufferOutputStreamback to summary
pack-priv PublicBufferOutputStream(int size)

Method Detail

getBufferback to summary
public byte[] getBuffer()