jdk/src/share/classes/java/nio/ByteBufferAs-X-Buffer.java

/*
 * 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]
    }

}