java.nio
Class HeapLongBufferR

java.lang.Object
  java.nio.Buffer
      java.nio.LongBuffer
          java.nio.HeapLongBuffer
              java.nio.HeapLongBufferR

All Implemented Interfaces:

Comparable

class HeapLongBufferR

extends HeapLongBuffer

A read-only HeapLongBuffer. This class extends the corresponding read/write class, overriding the mutation methods to throw a ReadOnlyBufferException and overriding the view-buffer methods to return an instance of this class rather than of the superclass.

Field Summary

Fields inherited from class java.nio.LongBuffer

hb, isReadOnly, offset

Fields inherited from class java.nio.Buffer

address

Constructor Summary

(package private)	HeapLongBufferR(int cap, int lim)
(package private)	HeapLongBufferR(long[] buf, int off, int len)
protected	HeapLongBufferR(long[] buf, int mark, int pos, int lim, int cap, int off)

Method Summary

LongBuffer	asReadOnlyBuffer() Creates a new, read-only long buffer that shares this buffer's content.
LongBuffer	compact() Compacts this buffer (optional operation).
LongBuffer	duplicate() Creates a new long buffer that shares this buffer's content.
long	get() Relative get method.
long	get(int i) Absolute get method.
LongBuffer	get(long[] dst, int offset, int length) Relative bulk get method.
boolean	isDirect() Tells whether or not this long buffer is direct.
boolean	isReadOnly() Tells whether or not this buffer is read-only.
protected int	ix(int i)
ByteOrder	order() Retrieves this buffer's byte order.
LongBuffer	put(int i, long x) Absolute put method (optional operation).
LongBuffer	put(long x) Relative put method (optional operation).
LongBuffer	put(long[] src, int offset, int length) Relative bulk put method (optional operation).
LongBuffer	put(LongBuffer src) Relative bulk put method (optional operation).
LongBuffer	slice() Creates a new long buffer whose content is a shared subsequence of this buffer's content.

Methods inherited from class java.nio.LongBuffer

allocate, array, arrayOffset, compareTo, equals, get, hasArray, hashCode, put, toString, wrap, wrap

Methods inherited from class java.nio.Buffer

capacity, checkBounds, checkIndex, checkIndex, clear, flip, hasRemaining, limit, limit, mark, markValue, nextGetIndex, nextGetIndex, nextPutIndex, nextPutIndex, position, position, remaining, reset, rewind

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

HeapLongBufferR

HeapLongBufferR(int cap,
                int lim)

HeapLongBufferR

HeapLongBufferR(long[] buf,
                int off,
                int len)

HeapLongBufferR

protected HeapLongBufferR(long[] buf,
                          int mark,
                          int pos,
                          int lim,
                          int cap,
                          int off)

Method Detail

slice

public LongBuffer slice()

Description copied from class: LongBuffer

Creates a new long buffer whose content is a shared subsequence of this buffer's content.

The content of the new buffer will start at this buffer's current position. Changes to this buffer's content will be visible in the new buffer, and vice versa; the two buffers' position, limit, and mark values will be independent.

The new buffer's position will be zero, its capacity and its limit will be the number of longs remaining in this buffer, and its mark will be undefined. The new buffer will be direct if, and only if, this buffer is direct, and it will be read-only if, and only if, this buffer is read-only.

Overrides:

slice in class HeapLongBuffer

duplicate

public LongBuffer duplicate()

Description copied from class: LongBuffer

Creates a new long buffer that shares this buffer's content.

The content of the new buffer will be that of this buffer. Changes to this buffer's content will be visible in the new buffer, and vice versa; the two buffers' position, limit, and mark values will be independent.

The new buffer's capacity, limit, position, and mark values will be identical to those of this buffer. The new buffer will be direct if, and only if, this buffer is direct, and it will be read-only if, and only if, this buffer is read-only.

Overrides:

duplicate in class HeapLongBuffer

asReadOnlyBuffer

public LongBuffer asReadOnlyBuffer()

Description copied from class: LongBuffer

Creates a new, read-only long buffer that shares this buffer's content.

The content of the new buffer will be that of this buffer. Changes to this buffer's content will be visible in the new buffer; the new buffer itself, however, will be read-only and will not allow the shared content to be modified. The two buffers' position, limit, and mark values will be independent.

The new buffer's capacity, limit, position, and mark values will be identical to those of this buffer.

If this buffer is itself read-only then this method behaves in exactly the same way as the duplicate method.

Overrides:

asReadOnlyBuffer in class HeapLongBuffer

isReadOnly

public boolean isReadOnly()

Description copied from class: Buffer

Tells whether or not this buffer is read-only.

Overrides:

isReadOnly in class HeapLongBuffer

put

public LongBuffer put(long x)

Description copied from class: LongBuffer

Relative put method (optional operation).

Writes the given long into this buffer at the current position, and then increments the position.

Overrides:

put in class HeapLongBuffer

put

public LongBuffer put(int i,
                      long x)

Description copied from class: LongBuffer

Absolute put method (optional operation).

Writes the given long into this buffer at the given index.

Overrides:

put in class HeapLongBuffer

put

public LongBuffer put(long[] src,
                      int offset,
                      int length)

Description copied from class: LongBuffer

Relative bulk put method (optional operation).

This method transfers longs into this buffer from the given source array. If there are more longs to be copied from the array than remain in this buffer, that is, if length > remaining(), then no longs are transferred and a BufferOverflowException is thrown.

Otherwise, this method copies length longs from the given array into this buffer, starting at the given offset in the array and at the current position of this buffer. The position of this buffer is then incremented by length.

In other words, an invocation of this method of the form dst.put(src, off, len) has exactly the same effect as the loop

     for (int i = off; i < off + len; i++)
         dst.put(a[i]); 

except that it first checks that there is sufficient space in this buffer and it is potentially much more efficient.

Overrides:

put in class HeapLongBuffer

put

public LongBuffer put(LongBuffer src)

Description copied from class: LongBuffer

Relative bulk put method (optional operation).

This method transfers the longs remaining in the given source buffer into this buffer. If there are more longs remaining in the source buffer than in this buffer, that is, if src.remaining() > remaining(), then no longs are transferred and a BufferOverflowException is thrown.

Otherwise, this method copies n = src.remaining() longs from the given buffer into this buffer, starting at each buffer's current position. The positions of both buffers are then incremented by n.

In other words, an invocation of this method of the form dst.put(src) has exactly the same effect as the loop

     while (src.hasRemaining())
         dst.put(src.get()); 

except that it first checks that there is sufficient space in this buffer and it is potentially much more efficient.

Overrides:

put in class HeapLongBuffer

compact

public LongBuffer compact()

Description copied from class: LongBuffer

Compacts this buffer (optional operation).

The longs between the buffer's current position and its limit, if any, are copied to the beginning of the buffer. That is, the long at index p = position() is copied to index zero, the long at index p + 1 is copied to index one, and so forth until the long at index limit() - 1 is copied to index n = limit() - 1 - p. The buffer's position is then set to n+1 and its limit is set to its capacity. The mark, if defined, is discarded.

The buffer's position is set to the number of longs copied, rather than to zero, so that an invocation of this method can be followed immediately by an invocation of another relative put method.

Overrides:

compact in class HeapLongBuffer

order

public ByteOrder order()

Description copied from class: LongBuffer

Retrieves this buffer's byte order.

The byte order of a long buffer created by allocation or by wrapping an existing long array is the native order of the underlying hardware. The byte order of a long buffer created as a view of a byte buffer is that of the byte buffer at the moment that the view is created.

Overrides:

order in class HeapLongBuffer

ix

protected int ix(int i)

get

public long get()

Description copied from class: LongBuffer

Relative get method. Reads the long at this buffer's current position, and then increments the position.

Specified by:

get in class LongBuffer

Returns:

The long at the buffer's current position

get

public long get(int i)

Description copied from class: LongBuffer

Absolute get method. Reads the long at the given index.

Specified by:

get in class LongBuffer

Parameters:

i - The index from which the long will be read

Returns:

The long at the given index

get

public LongBuffer get(long[] dst,
                      int offset,
                      int length)

Description copied from class: LongBuffer

Relative bulk get method.

This method transfers longs from this buffer into the given destination array. If there are fewer longs remaining in the buffer than are required to satisfy the request, that is, if length > remaining(), then no longs are transferred and a BufferUnderflowException is thrown.

Otherwise, this method copies length longs from this buffer into the given array, starting at the current position of this buffer and at the given offset in the array. The position of this buffer is then incremented by length.

In other words, an invocation of this method of the form src.get(dst, off, len) has exactly the same effect as the loop

     for (int i = off; i < off + len; i++)
         dst[i] = src.get(); 

except that it first checks that there are sufficient longs in this buffer and it is potentially much more efficient.

Overrides:

get in class LongBuffer

Parameters:

dst - The array into which longs are to be written

offset - The offset within the array of the first long to be written; must be non-negative and no larger than dst.length

length - The maximum number of longs to be written to the given array; must be non-negative and no larger than dst.length - offset

Returns:

This buffer

isDirect

public boolean isDirect()

Description copied from class: LongBuffer

Tells whether or not this long buffer is direct.

Specified by:

isDirect in class LongBuffer

Returns:

true if, and only if, this buffer is direct