*/
public abstract class ByteBuffer extends Buffer implements Comparable
{
+ private ByteOrder endian = ByteOrder.BIG_ENDIAN;
+
int offset;
byte[] backing_buffer;
}
/**
+ * This method transfers bytes from this buffer into
+ * the given destination array.
+ *
+ * @param dst The destination array
+ * @param offset The offset within the array of the first byte to be written;
+ * must be non-negative and no larger than dst.length.
+ * @param length The maximum number of bytes to be written to the given array;
+ * must be non-negative and no larger than dst.length - offset.
+ *
+ * @exception BufferUnderflowException If there are fewer than length bytes
+ * remaining in this buffer.
+ * @exception IndexOutOfBoundsException - If the preconditions on the offset
+ * and length parameters do not hold.
+ */
+ public ByteBuffer get (byte[] dst, int offset, int length)
+ {
+ if ((offset < 0)
+ || (offset > dst.length)
+ || (length < 0)
+ || (length > (dst.length - offset)))
+ throw new IndexOutOfBoundsException ();
+
+ for (int i = offset; i < offset + length; i++)
+ {
+ dst [i] = get();
+ }
+
+ return this;
+ }
+
+ /**
+ * This method transfers bytes from this buffer into the given
+ * destination array.
+ *
+ * @param dst The byte array to write into.
+ *
+ * @exception BufferUnderflowException If there are fewer than dst.length
+ * bytes remaining in this buffer.
+ */
+ public ByteBuffer get (byte[] dst)
+ {
+ return get (dst, 0, dst.length);
+ }
+
+ /**
* Writes the content of src into the buffer.
*
* @param src The source data.
}
/**
- * Relative get method.
+ * Tells whether or not this buffer is equal to another object.
+ */
+ public boolean equals (Object obj)
+ {
+ if (obj != null &&
+ obj instanceof ByteBuffer)
+ {
+ return compareTo (obj) == 0;
+ }
+
+ return false;
+ }
+
+ /**
+ * Compares this buffer to another object.
+ *
+ * @exception ClassCastException If the argument is not a byte buffer
+ */
+ public int compareTo (Object obj)
+ {
+ ByteBuffer a = (ByteBuffer) obj;
+
+ if (a.remaining() != remaining())
+ {
+ return 1;
+ }
+
+ if (! hasArray() ||
+ ! a.hasArray())
+ {
+ return 1;
+ }
+
+ int r = remaining();
+ int i1 = position ();
+ int i2 = a.position ();
+
+ for (int i = 0; i < r; i++)
+ {
+ int t = (int) (get (i1) - a.get (i2));
+
+ if (t != 0)
+ {
+ return (int) t;
+ }
+ }
+
+ return 0;
+ }
+
+ /**
+ * Retrieves this buffer's byte order.
+ */
+ public final ByteOrder order()
+ {
+ return endian;
+ }
+
+ /**
+ * Modifies this buffer's byte order.
+ */
+ public final ByteBuffer order (ByteOrder endian)
+ {
+ this.endian = endian;
+ return this;
+ }
+
+ /**
+ * Reads the byte at this buffer's current position,
+ * and then increments the position.
+ *
+ * @exception BufferUnderflowException If the buffer's current position
+ * is not smaller than its limit.
*/
public abstract byte get ();
* @exception ReadOnlyBufferException If this buffer is read-only.
*/
public abstract ByteBuffer put (byte b);
+
+ /**
+ * Absolute get method.
+ *
+ * @exception IndexOutOfBoundsException FIXME
+ */
+ public abstract byte get (int index);
+
+ /**
+ * Absolute put method.
+ *
+ * @exception ReadOnlyBufferException If this buffer is read-only
+ * @exception IndexOutOfBoundsException FIXME
+ */
+ public abstract ByteBuffer put (int index, byte b);
+
+ /**
+ * Compacts this buffer.
+ *
+ * @exception ReadOnlyBufferException If this buffer is read-only
+ */
+ public abstract ByteBuffer compact();
+
+ /**
+ * Tells whether or not this buffer is direct.
+ */
+ public abstract boolean isDirect();
+
+ /**
+ * Creates a new byte buffer whose content is a shared subsequence of this
+ * buffer's content.
+ */
+ public abstract ByteBuffer slice();
+
+ /**
+ * Creates a new byte buffer that shares this buffer's content.
+ */
+ public abstract ByteBuffer duplicate();
+
+ /**
+ * Creates a new, read-only byte buffer that shares this buffer's content.
+ */
+ public abstract ByteBuffer asReadOnlyBuffer();
+
+ /**
+ * Creates a view of this byte buffer as a short buffer.
+ */
+ public abstract ShortBuffer asShortBuffer();
+
+ /**
+ * Creates a view of this byte buffer as a char buffer.
+ */
+ public abstract CharBuffer asCharBuffer();
+
+ /**
+ * Creates a view of this byte buffer as an integer buffer.
+ */
+ public abstract IntBuffer asIntBuffer();
+
+ /**
+ * Creates a view of this byte buffer as a long buffer.
+ */
+ public abstract LongBuffer asLongBuffer();
+
+ /**
+ * Creates a view of this byte buffer as a float buffer.
+ */
+ public abstract FloatBuffer asFloatBuffer();
+
+ /**
+ * Creates a view of this byte buffer as a double buffer.
+ */
+ public abstract DoubleBuffer asDoubleBuffer();
+
+ /**
+ * Relative get method for reading a character value.
+ *
+ * @exception BufferUnderflowException If there are fewer than two bytes
+ * remaining in this buffer.
+ */
+ public abstract char getChar();
+
+ /**
+ * Relative put method for writing a character value.
+ *
+ * @exception BufferOverflowException If this buffer's current position is
+ * not smaller than its limit.
+ */
+ public abstract ByteBuffer putChar(char value);
+
+ /**
+ * Absolute get method for reading a character value.
+ *
+ * @exception IndexOutOfBoundsException If there are fewer than two bytes
+ * remaining in this buffer
+ */
+ public abstract char getChar(int index);
+
+ /**
+ * Absolute put method for writing a character value.
+ *
+ * @exception IndexOutOfBoundsException If index is negative or not smaller
+ * than the buffer's limit, minus one.
+ */
+ public abstract ByteBuffer putChar(int index, char value);
+
+ /**
+ * Relative get method for reading a short value.
+ *
+ * @exception BufferUnderflowException If index is negative or not smaller
+ * than the buffer's limit, minus one.
+ */
+ public abstract short getShort();
+
+ /**
+ * Relative put method for writing a short value.
+ *
+ * @exception BufferOverflowException If this buffer's current position is
+ * not smaller than its limit.
+ */
+ public abstract ByteBuffer putShort(short value);
+
+ /**
+ * Absolute get method for reading a short value.
+ *
+ * @exception IndexOutOfBoundsException If there are fewer than two bytes
+ * remaining in this buffer
+ */
+ public abstract short getShort(int index);
+
+ /**
+ * Absolute put method for writing a short value.
+ *
+ * @exception IndexOutOfBoundsException If index is negative or not smaller
+ * than the buffer's limit, minus one.
+ */
+ public abstract ByteBuffer putShort(int index, short value);
+
+ /**
+ * Relative get method for reading an integer value.
+ *
+ * @exception BufferUnderflowException If there are fewer than four bytes
+ * remaining in this buffer.
+ */
+ public abstract int getInt();
+
+ /**
+ * Relative put method for writing an integer value.
+ *
+ * @exception BufferOverflowException If this buffer's current position is
+ * not smaller than its limit.
+ */
+ public abstract ByteBuffer putInt(int value);
+
+ /**
+ * Absolute get method for reading an integer value.
+ *
+ * @exception IndexOutOfBoundsException If index is negative or not smaller
+ * than the buffer's limit, minus three.
+ */
+ public abstract int getInt(int index);
+
+ /**
+ * Absolute put method for writing an integer value.
+ *
+ * @exception IndexOutOfBoundsException If index is negative or not smaller
+ * than the buffer's limit, minus three.
+ */
+ public abstract ByteBuffer putInt(int index, int value);
+
+ /**
+ * Relative get method for reading a long value.
+ *
+ * @exception BufferUnderflowException If there are fewer than eight bytes
+ * remaining in this buffer.
+ */
+ public abstract long getLong();
+
+ /**
+ * Relative put method for writing a long value.
+ *
+ * @exception BufferOverflowException If this buffer's current position is
+ * not smaller than its limit.
+ */
+ public abstract ByteBuffer putLong(long value);
+
+ /**
+ * Absolute get method for reading a long value.
+ *
+ * @exception IndexOutOfBoundsException If index is negative or not smaller
+ * than the buffer's limit, minus seven.
+ */
+ public abstract long getLong(int index);
+
+ /**
+ * Absolute put method for writing a float value.
+ *
+ * @exception IndexOutOfBoundsException If index is negative or not smaller
+ * than the buffer's limit, minus seven.
+ */
+ public abstract ByteBuffer putLong(int index, long value);
+
+ /**
+ * Relative get method for reading a float value.
+ *
+ * @exception BufferUnderflowException If there are fewer than four bytes
+ * remaining in this buffer.
+ */
+ public abstract float getFloat();
+
+ /**
+ * Relative put method for writing a float value.
+ *
+ * @exception BufferOverflowException If there are fewer than four bytes
+ * remaining in this buffer.
+ */
+ public abstract ByteBuffer putFloat(float value);
+
+ /**
+ * Absolute get method for reading a float value.
+ *
+ * @exception IndexOutOfBoundsException If index is negative or not smaller
+ * than the buffer's limit, minus three.
+ */
+ public abstract float getFloat(int index);
+
+ /**
+ * Relative put method for writing a float value.
+ *
+ * @exception IndexOutOfBoundsException If index is negative or not smaller
+ * than the buffer's limit, minus three.
+ */
+ public abstract ByteBuffer putFloat(int index, float value);
+
+ /**
+ * Relative get method for reading a double value.
+ *
+ * @exception BufferUnderflowException If there are fewer than eight bytes
+ * remaining in this buffer.
+ */
+ public abstract double getDouble();
+
+ /**
+ * Relative put method for writing a double value.
+ *
+ * @exception BufferOverflowException If this buffer's current position is
+ * not smaller than its limit.
+ */
+ public abstract ByteBuffer putDouble(double value);
+
+ /**
+ * Absolute get method for reading a double value.
+ *
+ * @exception IndexOutOfBoundsException If index is negative or not smaller
+ * than the buffer's limit, minus seven.
+ */
+ public abstract double getDouble(int index);
+
+ /**
+ * Absolute put method for writing a double value.
+ *
+ * @exception IndexOutOfBoundsException If index is negative or not smaller
+ * than the buffer's limit, minus seven.
+ */
+ public abstract ByteBuffer putDouble(int index, double value);
+
+ /**
+ * Returns a string summarizing the state of this buffer.
+ */
+ public String toString ()
+ {
+ return getClass ().getName () +
+ "[pos=" + position () +
+ " lim=" + limit () +
+ " cap=" + capacity () + "]";
+ }
}
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