org.pentaho.reporting.engine.classic.core.util
Class MemoryStringWriter

java.lang.Object
  java.io.Writer
      org.pentaho.reporting.engine.classic.core.util.MemoryStringWriter

All Implemented Interfaces:

Closeable, Flushable, Appendable

public class MemoryStringWriter
extends Writer

A string writer that is able to write large amounts of data. The original StringWriter contained in Java doubles its buffersize everytime the buffer overflows. This is nice with small amounts of data, but awfull for huge buffers.

Author:

Thomas Morgner

Constructor Summary

MemoryStringWriter()
Create a new character-stream writer whose critical sections will synchronize on the writer itself.

MemoryStringWriter(int bufferSize)
Create a new character-stream writer whose critical sections will synchronize on the writer itself.

MemoryStringWriter(int bufferSize, int maximumBufferIncrement)

Method Summary

void	close() Close the stream, flushing it first.
MemoryStringReader	createReader()
void	flush() Flush the stream.
int	getCursor()
String	toString()
void	write(char[] cbuf, int off, int len) Write a portion of an array of characters.

Methods inherited from class java.io.Writer

append, append, append, write, write, write, write

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MemoryStringWriter

public MemoryStringWriter()

Create a new character-stream writer whose critical sections will synchronize on the writer itself.

MemoryStringWriter

public MemoryStringWriter(int bufferSize)

Create a new character-stream writer whose critical sections will synchronize on the writer itself.

MemoryStringWriter

public MemoryStringWriter(int bufferSize,
                          int maximumBufferIncrement)

Method Detail

write

public void write(char[] cbuf,
                  int off,
                  int len)
           throws IOException

Write a portion of an array of characters.

Specified by:

write in class Writer

Parameters:

cbuf - Array of characters

off - Offset from which to start writing characters

len - Number of characters to write

Throws:

IOException - If an I/O error occurs

flush

public void flush()
           throws IOException

Flush the stream. If the stream has saved any characters from the various write() methods in a buffer, write them immediately to their intended destination. Then, if that destination is another character or byte stream, flush it. Thus one flush() invocation will flush all the buffers in a chain of Writers and OutputStreams.

If the intended destination of this stream is an abstraction provided by the underlying operating system, for example a file, then flushing the stream guarantees only that bytes previously written to the stream are passed to the operating system for writing; it does not guarantee that they are actually written to a physical device such as a disk drive.

Specified by:

flush in interface Flushable

Specified by:

flush in class Writer

Throws:

IOException - If an I/O error occurs

close

public void close()
           throws IOException

Close the stream, flushing it first. Once a stream has been closed, further write() or flush() invocations will cause an IOException to be thrown. Closing a previously-closed stream, however, has no effect.

Specified by:

close in interface Closeable

Specified by:

close in class Writer

Throws:

IOException - If an I/O error occurs

getCursor

public int getCursor()

createReader

public MemoryStringReader createReader()

toString

public String toString()

Overrides:

toString in class Object