MappedByteBufferDataSource (Serviceability Agent API)

java.lang.Object
- sun.jvm.hotspot.debugger.MappedByteBufferDataSource

All Implemented Interfaces:

DataSource
```
public class MappedByteBufferDataSource
extends java.lang.Object
implements DataSource
```
Implementation of DataSource using MappedByteBuffer. This works around a performance problem in JDK 1.4 where ByteBuffer's operations always become virtual calls rather than being inlined. Need to fix this soon.

Constructor Summary

Constructors
Constructor and Description

MappedByteBufferDataSource(java.nio.MappedByteBuffer buf)

Constructors
Constructor and Description
`MappedByteBufferDataSource(java.nio.MappedByteBuffer buf)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`close()`
`long`	`getFilePointer()`
`int`	`read(byte[] b)`
`byte`	`readByte()`
`int`	`readInt()`
`long`	`readLong()`
`short`	`readShort()`
`void`	`seek(long pos)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - MappedByteBufferDataSource
```
public MappedByteBufferDataSource(java.nio.MappedByteBuffer buf)
```
- Method Detail
  - readByte
```
public byte readByte()
              throws java.io.IOException
```
    Specified by:
    
    readByte in interface DataSource
    
    Throws:
    
    java.io.IOException
  - readShort
```
public short readShort()
                throws java.io.IOException
```
    Specified by:
    
    readShort in interface DataSource
    
    Throws:
    
    java.io.IOException
  - readInt
```
public int readInt()
            throws java.io.IOException
```
    Specified by:
    
    readInt in interface DataSource
    
    Throws:
    
    java.io.IOException
  - readLong
```
public long readLong()
              throws java.io.IOException
```
    Specified by:
    
    readLong in interface DataSource
    
    Throws:
    
    java.io.IOException
  - read
```
public int read(byte[] b)
         throws java.io.IOException
```
    Specified by:
    
    read in interface DataSource
    
    Throws:
    
    java.io.IOException
  - seek
```
public void seek(long pos)
          throws java.io.IOException
```
    Specified by:
    
    seek in interface DataSource
    
    Throws:
    
    java.io.IOException
  - getFilePointer
```
public long getFilePointer()
                    throws java.io.IOException
```
    Specified by:
    
    getFilePointer in interface DataSource
    
    Throws:
    
    java.io.IOException
  - close
```
public void close()
           throws java.io.IOException
```
    Specified by:
    
    close in interface DataSource
    
    Throws:
    
    java.io.IOException

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Class MappedByteBufferDataSource

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

MappedByteBufferDataSource

Method Detail

readByte

readShort

readInt

readLong

read

seek

getFilePointer

close