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java.lang.Object java.io.OutputStream net.jini.io.OptimizedByteArrayOutputStream
public class OptimizedByteArrayOutputStream
This class is an optimized porting of java.io.ByteArrayOutputStream: a) All methods are not synchronized. b) Most safety checks have been removed. c) ensureCapacity method have been added, for low level optimizations. Naturally, this class and all of its methods are not thread safe.
Field Summary | |
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protected byte[] |
_buffer
The buffer where data is stored. |
protected int |
_count
The number of valid bytes in the buffer. |
Constructor Summary | |
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OptimizedByteArrayOutputStream()
Creates a new byte array output stream. |
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OptimizedByteArrayOutputStream(int capacity)
Creates a new byte array output stream, with a buffer capacity of the specified size, in bytes. |
Method Summary | |
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void |
copyToBuffer(ByteBuffer buffer)
Copy internal buffer |
boolean |
ensureCapacity(int delta)
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byte[] |
getBuffer()
Gets internal buffers |
int |
getCapacity()
The current buffer capacity. |
void |
reset()
Resets the count field of this byte array output
stream to zero, so that all currently accumulated output in the
output stream is discarded. |
void |
setBuffer(byte[] buf)
Set stream buffer, and reset the counter. |
void |
setBuffer(byte[] buffer,
int count)
Set stream buffer and set the counter. |
void |
setSize(int size)
Set the buffer size. |
int |
size()
Returns the current size of the buffer. |
byte[] |
toByteArray()
Creates a newly allocated byte array. |
void |
write(byte[] b,
int off,
int len)
Writes len bytes from the specified byte array
starting at offset off to this byte array output stream. |
void |
write(int b)
Writes the specified byte to this byte array output stream. |
void |
writeByte(byte b)
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void |
writeTo(OutputStream out)
Writes the complete contents of this byte array output stream to the specified output stream argument, as if by calling the output stream's write method using out.write(buf, 0, count) . |
Methods inherited from class java.io.OutputStream |
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close, flush, write |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected byte[] _buffer
protected int _count
Constructor Detail |
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public OptimizedByteArrayOutputStream()
public OptimizedByteArrayOutputStream(int capacity)
capacity
- the initial capacity.
IllegalArgumentException
- if size is negative.Method Detail |
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public final void copyToBuffer(ByteBuffer buffer)
public void setBuffer(byte[] buf)
buf
- new bufferpublic void setBuffer(byte[] buffer, int count)
count
- amount of valid bytespublic byte[] getBuffer()
public void setSize(int size)
size
- amount of valid bytespublic int size()
count
field, which is the number
of valid bytes in this output stream.ByteArrayOutputStream.count
public int getCapacity()
public void write(int b)
write
in class OutputStream
b
- the byte to be written.public void writeByte(byte b)
public void write(byte[] b, int off, int len)
len
bytes from the specified byte array
starting at offset off
to this byte array output stream.
write
in class OutputStream
b
- the data.off
- the start offset in the data.len
- the number of bytes to write.public boolean ensureCapacity(int delta)
public void writeTo(OutputStream out) throws IOException
out.write(buf, 0, count)
.
out
- the output stream to which to write the data.
IOException
- if an I/O error occurs.public void reset()
count
field of this byte array output
stream to zero, so that all currently accumulated output in the
output stream is discarded. The output stream can be used again,
reusing the already allocated buffer space.
ByteArrayInputStream.count
public byte[] toByteArray()
ByteArrayOutputStream.size()
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