ByteBufferAs X Buffer.java :  » 6.0-JDK-Core » io-nio » java » nio » Java Open Source

/*
 * Copyright 2000-2004 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

#warn This file is preprocessed before being compiled

package java.nio;


class ByteBufferAs$Type$Buffer$RW$$BO$      // package-private
    extends {#if[ro]?ByteBufferAs}$Type$Buffer{#if[ro]?$BO$}
{

#if[rw]

    protected final ByteBuffer bb;
    protected final int offset;

#end[rw]

    ByteBufferAs$Type$Buffer$RW$$BO$(ByteBuffer bb) {  // package-private
#if[rw]
  super(-1, 0,
        bb.remaining() >> $LG_BYTES_PER_VALUE$,
        bb.remaining() >> $LG_BYTES_PER_VALUE$);
  this.bb = bb;
  // enforce limit == capacity
  int cap = this.capacity();
  this.limit(cap);
  int pos = this.position();
  assert (pos <= cap);
  offset = pos;
#else[rw]
  super(bb);
#end[rw]
    }

    ByteBufferAs$Type$Buffer$RW$$BO$(ByteBuffer bb,
             int mark, int pos, int lim, int cap,
             int off)
    {
#if[rw]
  super(mark, pos, lim, cap);
  this.bb = bb;
  offset = off;
#else[rw]
  super(bb, mark, pos, lim, cap, off);
#end[rw]
    }

    public $Type$Buffer slice() {
  int pos = this.position();
  int lim = this.limit();
  assert (pos <= lim);
  int rem = (pos <= lim ? lim - pos : 0);
  int off = (pos << $LG_BYTES_PER_VALUE$) + offset;
        assert (off >= 0);
  return new ByteBufferAs$Type$Buffer$RW$$BO$(bb, -1, 0, rem, rem, off);
    }

    public $Type$Buffer duplicate() {
  return new ByteBufferAs$Type$Buffer$RW$$BO$(bb,
                this.markValue(),
                this.position(),
                this.limit(),
                this.capacity(),
                offset);
    }

    public $Type$Buffer asReadOnlyBuffer() {
#if[rw]
  return new ByteBufferAs$Type$BufferR$BO$(bb,
             this.markValue(),
             this.position(),
             this.limit(),
             this.capacity(),
             offset);
#else[rw]
  return duplicate();
#end[rw]
    }

#if[rw]

    protected int ix(int i) {
  return (i << $LG_BYTES_PER_VALUE$) + offset;
    }

    public $type$ get() {
  return Bits.get$Type$$BO$(bb, ix(nextGetIndex()));
    }

    public $type$ get(int i) {
  return Bits.get$Type$$BO$(bb, ix(checkIndex(i)));
    }

#end[rw]

    public $Type$Buffer put($type$ x) {
#if[rw]
  Bits.put$Type$$BO$(bb, ix(nextPutIndex()), x);
  return this;
#else[rw]
  throw new ReadOnlyBufferException();
#end[rw]
    }

    public $Type$Buffer put(int i, $type$ x) {
#if[rw]
  Bits.put$Type$$BO$(bb, ix(checkIndex(i)), x);
  return this;
#else[rw]
  throw new ReadOnlyBufferException();
#end[rw]
    }

    public $Type$Buffer compact() {
#if[rw]
  int pos = position();
  int lim = limit();
  assert (pos <= lim);
  int rem = (pos <= lim ? lim - pos : 0);

  ByteBuffer db = bb.duplicate();
   db.limit(ix(lim));
  db.position(ix(0));
  ByteBuffer sb = db.slice();
  sb.position(pos << $LG_BYTES_PER_VALUE$);
  sb.compact();
   position(rem);
  limit(capacity());
  return this;
#else[rw]
  throw new ReadOnlyBufferException();
#end[rw]
    }

    public boolean isDirect() {
  return bb.isDirect();
    }

    public boolean isReadOnly() {
  return {#if[rw]?false:true};
    }

#if[char]

    public String toString(int start, int end) {
  if ((end > limit()) || (start > end))
      throw new IndexOutOfBoundsException();
  try {
      int len = end - start;
      char[] ca = new char[len];
      CharBuffer cb = CharBuffer.wrap(ca);
      CharBuffer db = this.duplicate();
      db.position(start);
      db.limit(end);
      cb.put(db);
      return new String(ca);
  } catch (StringIndexOutOfBoundsException x) {
      throw new IndexOutOfBoundsException();
  }
    }


    // --- Methods to support CharSequence ---

    public CharSequence subSequence(int start, int end) {
  int pos = position();
  int lim = limit();
  assert (pos <= lim);
  pos = (pos <= lim ? pos : lim);
  int len = lim - pos;

  if ((start < 0) || (end > len) || (start > end))
      throw new IndexOutOfBoundsException();
  int sublen = end - start;
   int off = offset + ((pos + start) << $LG_BYTES_PER_VALUE$);
        assert (off >= 0);
  return new ByteBufferAsCharBuffer$RW$$BO$(bb, -1, 0, sublen, sublen, off);
    }

#end[char]


    public ByteOrder order() {
#if[boB]
  return ByteOrder.BIG_ENDIAN;
#end[boB]
#if[boL]
  return ByteOrder.LITTLE_ENDIAN;
#end[boL]
    }

}