Java Doc for MemByteHolder.java in  » Database-DBMS » db-derby-10.2 » org » apache » derby » impl » store » raw » data » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.impl.store.raw.data 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.apache.derby.impl.store.raw.data.MemByteHolder

MemByteHolder
public class MemByteHolder implements ByteHolder(Code)
A ByteHolder that stores all its bytes in memory.


Field Summary
 intbufSize
    
 VectorbufV
    
 byte[]curBuf
    
 intcurBufDataBytes
    
 intcurBufPos
    
 intcurBufVEleAt
    
 intlastBufDataBytes
    
 intlastBufVEleAt
    
 booleanwriting
    

Constructor Summary
public  MemByteHolder(int bufSize)
     Create a new MemByteHolder.

Method Summary
public  intavailable()
    
public  voidclear()
    
protected  booleangetNextBuffer_r()
     Get the next buffer for reading bytes.
protected  voidgetNextBuffer_w()
     Get the next buffer for writing bytes.
protected  voidgetNextBuffer_w_Sanity()
    
protected  voidinitBuffer_w()
    
public  intnumBytesSaved()
     Return the number of bytes that have been saved to this byte holder.
public  intread()
    
public  intread(byte b, int off, int len)
    
public  intread(OutputStream out, int len)
    
public  intread(byte b, int off, OutputStream out, int len)
    
public  intshiftToFront()
    
public  longskip(long count)
    
public  voidstartReading()
    
public  StringtoString()
     Produce a string describing the state of this ByteHolder.
public  voidwrite(int b)
    
public  voidwrite(byte[] data, int offset, int len)
    
public  longwrite(InputStream is, long count)
    
public  booleanwritingMode()
    

Field Detail
bufSize
int bufSize(Code)



bufV
Vector bufV(Code)



curBuf
byte[] curBuf(Code)



curBufDataBytes
int curBufDataBytes(Code)



curBufPos
int curBufPos(Code)



curBufVEleAt
int curBufVEleAt(Code)



lastBufDataBytes
int lastBufDataBytes(Code)



lastBufVEleAt
int lastBufVEleAt(Code)



writing
boolean writing(Code)




Constructor Detail
MemByteHolder
public MemByteHolder(int bufSize)(Code)
Create a new MemByteHolder. Store bytes as a list of buffers of size 'bufSize'.




Method Detail
available
public int available()(Code)

See Also:   ByteHolder.available



clear
public void clear() throws IOException(Code)

See Also:   ByteHolder.clear
exception:
  IOException - Thrown on error



getNextBuffer_r
protected boolean getNextBuffer_r() throws IOException(Code)
Get the next buffer for reading bytes. true if the user has read all the bytesin this ByteHolder.
exception:
  IOException - Thrown on error



getNextBuffer_w
protected void getNextBuffer_w() throws IOException(Code)
Get the next buffer for writing bytes.
exception:
  IOException - Thrown on error



getNextBuffer_w_Sanity
protected void getNextBuffer_w_Sanity()(Code)
Do sanity checking when getting the next write buffer



initBuffer_w
protected void initBuffer_w()(Code)
Initialize a buffer for writing



numBytesSaved
public int numBytesSaved()(Code)
Return the number of bytes that have been saved to this byte holder. This result is different from available() as it is unaffected by the current read position on the ByteHolder.
See Also:   ByteHolder.numBytesSaved



read
public int read() throws IOException(Code)

See Also:   ByteHolder.read
exception:
  IOException - Thrown on error



read
public int read(byte b, int off, int len) throws IOException(Code)

See Also:   ByteHolder.read
exception:
  IOException - Thrown on error



read
public int read(OutputStream out, int len) throws IOException(Code)

See Also:   ByteHolder.read
exception:
  IOException - Thrown on error



read
public int read(byte b, int off, OutputStream out, int len) throws IOException(Code)

See Also:   ByteHolder.read
exception:
  IOException - Thrown on error



shiftToFront
public int shiftToFront() throws IOException(Code)

See Also:   ByteHolder.shiftToFront
exception:
  IOException - Thrown on error



skip
public long skip(long count) throws IOException(Code)

See Also:   ByteHolder.skip
exception:
  IOException - Thrown on error



startReading
public void startReading() throws IOException(Code)

See Also:   ByteHolder.startReading



toString
public String toString()(Code)
Produce a string describing the state of this ByteHolder. This is mainly for debugging.



write
public void write(int b) throws IOException(Code)

See Also:   ByteHolder.write
exception:
  IOException - Thrown on error



write
public void write(byte[] data, int offset, int len) throws IOException(Code)

See Also:   ByteHolder.write
exception:
  IOException - Thrown on error



write
public long write(InputStream is, long count) throws IOException(Code)

See Also:   ByteHolder.write
exception:
  IOException - Thrown on error



writingMode
public boolean writingMode()(Code)

See Also:   ByteHolder.writingMode



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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