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10 package java.nio;
11
12 import sun.misc.Cleaner;
13 import sun.misc.Unsafe;
14 import sun.nio.ch.DirectBuffer;
15 import sun.nio.ch.FileChannelImpl;
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17
18 class DirectCharBufferRU
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22 extends DirectCharBufferU 
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24 implements DirectBuffer
25 {
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144 DirectCharBufferRU(DirectBuffer db, int mark, int pos, int lim, int cap,
148 int off)
149 {
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158 super(db, mark, pos, lim, cap, off);
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160 }
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162 public CharBuffer slice() {
163 int pos = this.position();
164 int lim = this.limit();
165 assert (pos <= lim);
166 int rem = (pos <= lim ? lim - pos : 0);
167 int off = (pos << 1);
168 assert (off >= 0);
169 return new DirectCharBufferRU (this, -1, 0, rem, rem, off);
170 }
171
172 public CharBuffer duplicate() {
173 return new DirectCharBufferRU (this,
174 this.markValue(),
175 this.position(),
176 this.limit(),
177 this.capacity(),
178 0);
179 }
180
181 public CharBuffer asReadOnlyBuffer() {
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190 return duplicate();
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192 }
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243 public CharBuffer put(char x) {
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248 throw new ReadOnlyBufferException ();
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250 }
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252 public CharBuffer put(int i, char x) {
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257 throw new ReadOnlyBufferException ();
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259 }
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261 public CharBuffer put(CharBuffer src) {
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298 throw new ReadOnlyBufferException ();
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300 }
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302 public CharBuffer put(char[] src, int offset, int length) {
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325 throw new ReadOnlyBufferException ();
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327 }
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329 public CharBuffer compact() {
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341 throw new ReadOnlyBufferException ();
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343 }
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345 public boolean isDirect() {
346 return true;
347 }
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349 public boolean isReadOnly() {
350 return true;
351 }
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356 public String toString(int start, int end) {
357 if ((end > limit()) || (start > end))
358 throw new IndexOutOfBoundsException ();
359 try {
360 int len = end - start;
361 char[] ca = new char[len];
362 CharBuffer cb = CharBuffer.wrap(ca);
363 CharBuffer db = this.duplicate();
364 db.position(start);
365 db.limit(end);
366 cb.put(db);
367 return new String (ca);
368 } catch (StringIndexOutOfBoundsException x) {
369 throw new IndexOutOfBoundsException ();
370 }
371 }
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374
376 public CharSequence subSequence(int start, int end) {
377 int pos = position();
378 int lim = limit();
379 assert (pos <= lim);
380 pos = (pos <= lim ? pos : lim);
381 int len = lim - pos;
382
383 if ((start < 0) || (end > len) || (start > end))
384 throw new IndexOutOfBoundsException ();
385 int sublen = end - start;
386 int off = (pos + start) << 1;
387 assert (off >= 0);
388 return new DirectCharBufferRU (this, -1, 0, sublen, sublen, off);
389 }
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397 public ByteOrder order() {
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403 return ((ByteOrder.nativeOrder() != ByteOrder.BIG_ENDIAN)
404 ? ByteOrder.LITTLE_ENDIAN : ByteOrder.BIG_ENDIAN);
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406 }
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433 }
434 |
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