Java Code Examples for java.nio.ByteBuffer#limit()
The following examples show how to use
java.nio.ByteBuffer#limit() .
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Example 1
Source File: BrotliCompressorTest.java From jbrotli with Apache License 2.0 | 6 votes |
@Test public void compress_with_byte_array_wrapped_ByteBuffer_using_position_and_limit_on_output_buffer() throws Exception { // setup ByteBuffer inBuffer = wrap(A_BYTES); ByteBuffer outBuffer = allocate(100); // given int testPosition = 23; outBuffer.position(testPosition); outBuffer.limit(testPosition + A_BYTES_COMPRESSED.length); // when int outLength = compressor.compress(Brotli.DEFAULT_PARAMETER, inBuffer, outBuffer); // then assertThat(outLength).isEqualTo(A_BYTES_COMPRESSED.length); assertThat(outBuffer.position()).isEqualTo(testPosition); assertThat(outBuffer.limit()).isEqualTo(testPosition + outLength); assertThat(inBuffer.position()).isEqualTo(A_BYTES.length); // then assertThat(getByteArray(outBuffer)).isEqualTo(A_BYTES_COMPRESSED); }
Example 2
Source File: PcapNgFile.java From tracecompass with Eclipse Public License 2.0 | 6 votes |
/** * Get an option value for a given option code from an options list * * @param options * options list byte buffer * @param code * option code * @return a byte buffer containing the option value, or null if not found */ private static @Nullable ByteBuffer getOptionValue(ByteBuffer options, int code) { options.rewind(); while (options.remaining() > 0) { short optionCode = options.getShort(); if (optionCode == PcapNgFileValues.ENDOFOPT_CODE) { break; } int length = ConversionHelper.unsignedShortToInt(options.getShort()); if (optionCode == code) { ByteBuffer value = options.slice(); value.limit(length); value.order(options.order()); return value; } if (length % 4 != 0) { // pad to 32-bit boundary length += (4 - length % 4); } options.position(options.position() + length); } return null; }
Example 3
Source File: RemotingCommand.java From rocketmq_trans_message with Apache License 2.0 | 6 votes |
public static RemotingCommand decode(final ByteBuffer byteBuffer) { int length = byteBuffer.limit(); int oriHeaderLen = byteBuffer.getInt(); int headerLength = getHeaderLength(oriHeaderLen); byte[] headerData = new byte[headerLength]; byteBuffer.get(headerData); RemotingCommand cmd = headerDecode(headerData, getProtocolType(oriHeaderLen)); int bodyLength = length - 4 - headerLength; byte[] bodyData = null; if (bodyLength > 0) { bodyData = new byte[bodyLength]; byteBuffer.get(bodyData); } cmd.body = bodyData; return cmd; }
Example 4
Source File: TestDelegatingSeekableInputStream.java From parquet-mr with Apache License 2.0 | 5 votes |
@Test public void testDirectReadFullySmallTempBufferWithPositionAndLimit() throws Exception { byte[] temp = new byte[2]; // this will cause readFully to loop final ByteBuffer readBuffer = ByteBuffer.allocateDirect(10); readBuffer.position(3); readBuffer.limit(7); readBuffer.mark(); MockInputStream stream = new MockInputStream(2, 3, 3); DelegatingSeekableInputStream.readFullyDirectBuffer(stream, readBuffer, temp); Assert.assertEquals(7, readBuffer.position()); Assert.assertEquals(7, readBuffer.limit()); DelegatingSeekableInputStream.readFullyDirectBuffer(stream, readBuffer, temp); Assert.assertEquals(7, readBuffer.position()); Assert.assertEquals(7, readBuffer.limit()); readBuffer.reset(); Assert.assertEquals("Buffer contents should match", ByteBuffer.wrap(TEST_ARRAY, 0, 4), readBuffer); readBuffer.position(7); readBuffer.limit(10); DelegatingSeekableInputStream.readFullyDirectBuffer(stream, readBuffer, temp); Assert.assertEquals(10, readBuffer.position()); Assert.assertEquals(10, readBuffer.limit()); readBuffer.reset(); Assert.assertEquals("Buffer contents should match", ByteBuffer.wrap(TEST_ARRAY, 0, 7), readBuffer); }
Example 5
Source File: ISO_8859_1.java From openjdk-jdk9 with GNU General Public License v2.0 | 5 votes |
private CoderResult decodeArrayLoop(ByteBuffer src, CharBuffer dst) { byte[] sa = src.array(); int sp = src.arrayOffset() + src.position(); int sl = src.arrayOffset() + src.limit(); assert (sp <= sl); sp = (sp <= sl ? sp : sl); char[] da = dst.array(); int dp = dst.arrayOffset() + dst.position(); int dl = dst.arrayOffset() + dst.limit(); assert (dp <= dl); dp = (dp <= dl ? dp : dl); try { while (sp < sl) { byte b = sa[sp]; if (dp >= dl) return CoderResult.OVERFLOW; da[dp++] = (char)(b & 0xff); sp++; } return CoderResult.UNDERFLOW; } finally { src.position(sp - src.arrayOffset()); dst.position(dp - dst.arrayOffset()); } }
Example 6
Source File: RowValueDecoderTest.java From kylin with Apache License 2.0 | 5 votes |
@Test public void testDecode() throws Exception { CubeDesc cubeDesc = CubeManager.getInstance(getTestConfig()).getCube("test_kylin_cube_with_slr_ready").getDescriptor(); HBaseColumnDesc hbaseCol = cubeDesc.getHbaseMapping().getColumnFamily()[0].getColumns()[0]; BufferedMeasureCodec codec = new BufferedMeasureCodec(hbaseCol.getMeasures()); BigDecimal sum = new BigDecimal("333.1234567"); BigDecimal min = new BigDecimal("333.1111111"); BigDecimal max = new BigDecimal("333.1999999"); Long count = new Long(2); Long item_count = new Long(100); ByteBuffer buf = codec.encode(new Object[] { sum, min, max, count, item_count }); buf.flip(); byte[] valueBytes = new byte[buf.limit()]; System.arraycopy(buf.array(), 0, valueBytes, 0, buf.limit()); RowValueDecoder rowValueDecoder = new RowValueDecoder(hbaseCol); for (MeasureDesc measure : cubeDesc.getMeasures()) { FunctionDesc aggrFunc = measure.getFunction(); int index = hbaseCol.findMeasure(aggrFunc); rowValueDecoder.setProjectIndex(index); } rowValueDecoder.decodeAndConvertJavaObj(valueBytes); Object[] measureValues = rowValueDecoder.getValues(); //BigDecimal.ROUND_HALF_EVEN in BigDecimalSerializer assertEquals("[333.1235, 333.1111, 333.2000, 2, 100]", Arrays.toString(measureValues)); }
Example 7
Source File: DoubleByte.java From openjdk-8-source with GNU General Public License v2.0 | 5 votes |
protected CoderResult decodeArrayLoop(ByteBuffer src, CharBuffer dst) { byte[] sa = src.array(); int sp = src.arrayOffset() + src.position(); int sl = src.arrayOffset() + src.limit(); char[] da = dst.array(); int dp = dst.arrayOffset() + dst.position(); int dl = dst.arrayOffset() + dst.limit(); try { while (sp < sl && dp < dl) { // inline the decodeSingle/Double() for better performance int inSize = 1; int b1 = sa[sp] & 0xff; char c = b2cSB[b1]; if (c == UNMAPPABLE_DECODING) { if (sl - sp < 2) return crMalformedOrUnderFlow(b1); int b2 = sa[sp + 1] & 0xff; if (b2 < b2Min || b2 > b2Max || (c = b2c[b1][b2 - b2Min]) == UNMAPPABLE_DECODING) { return crMalformedOrUnmappable(b1, b2); } inSize++; } da[dp++] = c; sp += inSize; } return (sp >= sl) ? CoderResult.UNDERFLOW : CoderResult.OVERFLOW; } finally { src.position(sp - src.arrayOffset()); dst.position(dp - dst.arrayOffset()); } }
Example 8
Source File: TestBytes.java From hbase with Apache License 2.0 | 5 votes |
public void testGetBytesForByteBuffer() { byte[] array = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; ByteBuffer target = ByteBuffer.wrap(array); target.position(2); target.limit(7); byte[] actual = Bytes.getBytes(target); byte[] expected = { 2, 3, 4, 5, 6 }; assertArrayEquals(expected, actual); assertEquals(2, target.position()); assertEquals(7, target.limit()); }
Example 9
Source File: PBKDF2KeyImpl.java From jdk8u-jdk with GNU General Public License v2.0 | 5 votes |
private static byte[] getPasswordBytes(char[] passwd) { Charset utf8 = Charset.forName("UTF-8"); CharBuffer cb = CharBuffer.wrap(passwd); ByteBuffer bb = utf8.encode(cb); int len = bb.limit(); byte[] passwdBytes = new byte[len]; bb.get(passwdBytes, 0, len); return passwdBytes; }
Example 10
Source File: UnknownEntry.java From mp4parser with Apache License 2.0 | 5 votes |
@Override public String toString() { ByteBuffer bb = content.duplicate(); ((Buffer)bb).rewind(); byte[] b = new byte[bb.limit()]; bb.get(b); return "UnknownEntry{" + "content=" + Hex.encodeHex(b) + '}'; }
Example 11
Source File: BinaryDocValuesField.java From liresolr with GNU General Public License v2.0 | 5 votes |
@Override public IndexableField createField(SchemaField field, Object val /*, float boost*/) { if (val == null) return null; if (!field.stored()) { return null; } byte[] buf = null; int offset = 0, len = 0; if (val instanceof byte[]) { buf = (byte[]) val; len = buf.length; } else if (val instanceof ByteBuffer && ((ByteBuffer)val).hasArray()) { ByteBuffer byteBuf = (ByteBuffer) val; buf = byteBuf.array(); offset = byteBuf.position(); len = byteBuf.limit() - byteBuf.position(); } else { String strVal = val.toString(); //the string has to be a base64 encoded string buf = Base64.base64ToByteArray(strVal); offset = 0; len = buf.length; } Field f = new org.apache.lucene.document.BinaryDocValuesField(field.getName(), new BytesRef(buf, offset, len)); // Field f = new org.apache.lucene.document.StoredField(field.getName(), buf, offset, len); //f.setBoost(boost); return f; }
Example 12
Source File: DataDecoder.java From qpid-proton-j with Apache License 2.0 | 5 votes |
@Override public void parse(ByteBuffer b, Data data) { int size = b.getInt(); ByteBuffer buf = b.slice(); buf.limit(size); b.position(b.position()+size); int count = buf.getInt(); parseArray(data, buf, count); }
Example 13
Source File: Buffers.java From jlibs with Apache License 2.0 | 5 votes |
public void write(byte b){ ByteBuffer buffer = this.length==0 ? null : array[this.offset+this.length-1]; if(buffer==null || buffer.limit()==buffer.capacity()) append(buffer=BufferAllocator.current().allocate()); else NIOUtil.compact(buffer); buffer.put(b); buffer.flip(); }
Example 14
Source File: DatagramChannelImpl.java From dragonwell8_jdk with GNU General Public License v2.0 | 5 votes |
private int send(FileDescriptor fd, ByteBuffer src, InetSocketAddress target) throws IOException { if (src instanceof DirectBuffer) return sendFromNativeBuffer(fd, src, target); // Substitute a native buffer int pos = src.position(); int lim = src.limit(); assert (pos <= lim); int rem = (pos <= lim ? lim - pos : 0); ByteBuffer bb = Util.getTemporaryDirectBuffer(rem); try { bb.put(src); bb.flip(); // Do not update src until we see how many bytes were written src.position(pos); int n = sendFromNativeBuffer(fd, bb, target); if (n > 0) { // now update src src.position(pos + n); } return n; } finally { Util.releaseTemporaryDirectBuffer(bb); } }
Example 15
Source File: TypeCodeOutputStream.java From openjdk-8 with GNU General Public License v2.0 | 4 votes |
public void writeRawBuffer(org.omg.CORBA.portable.OutputStream s, int firstLong) { // Writes this streams buffer to the given OutputStream // without byte order flag and length as is the case for encapsulations. // Make sure to align s to 4 byte boundaries. // Unfortunately we can't do just this: // s.alignAndReserve(4, 4); // So we have to take the first four bytes given in firstLong and write them // with a call to write_long which will trigger the alignment. // Then write the rest of the byte array. //if (TypeCodeImpl.debug) { //System.out.println(this + ".writeRawBuffer(" + s + ", " + firstLong + ")"); //if (s instanceof CDROutputStream) { //System.out.println("Parent position before writing kind = " + ((CDROutputStream)s).getIndex()); //} //} s.write_long(firstLong); //if (TypeCodeImpl.debug) { //if (s instanceof CDROutputStream) { //System.out.println("Parent position after writing kind = " + ((CDROutputStream)s).getIndex()); //} //} ByteBuffer byteBuffer = getByteBuffer(); if (byteBuffer.hasArray()) { s.write_octet_array(byteBuffer.array(), 4, getIndex() - 4); } else { // get bytes from DirectByteBuffer // NOTE: Microbenchmarks are showing it is faster to do // a loop of ByteBuffer.get(int) than it is to do // a bulk ByteBuffer.get(byte[], offset, length) byte[] buf = new byte[byteBuffer.limit()]; for (int i = 0; i < buf.length; i++) buf[i] = byteBuffer.get(i); s.write_octet_array(buf, 4, getIndex() - 4); } //if (TypeCodeImpl.debug) { //if (s instanceof CDROutputStream) { //System.out.println("Parent position after writing all " + getIndex() + " bytes = " + ((CDROutputStream)s).getIndex()); //} //} }
Example 16
Source File: FileData.java From openjdk-jdk8u-backup with GNU General Public License v2.0 | 4 votes |
FileData(DataFile file, ByteBuffer buf) { this(file, file.writeTo(buf.array(), 0, buf.limit()), buf.limit()); }
Example 17
Source File: SimpleEUCEncoder.java From jdk8u60 with GNU General Public License v2.0 | 4 votes |
private CoderResult encodeArrayLoop(CharBuffer src, ByteBuffer dst) { char[] sa = src.array(); int sp = src.arrayOffset() + src.position(); int sl = src.arrayOffset() + src.limit(); assert (sp <= sl); sp = (sp <= sl ? sp : sl); byte[] da = dst.array(); int dp = dst.arrayOffset() + dst.position(); int dl = dst.arrayOffset() + dst.limit(); assert (dp <= dl); dp = (dp <= dl ? dp : dl); int index; int spaceNeeded; int i; try { while (sp < sl) { boolean allZeroes = true; char inputChar = sa[sp]; if (Character.isSurrogate(inputChar)) { if (sgp.parse(inputChar, sa, sp, sl) < 0) return sgp.error(); return sgp.unmappableResult(); } if (inputChar >= '\uFFFE') return CoderResult.unmappableForLength(1); String theChars; char aChar; // We have a valid character, get the bytes for it index = index1[((inputChar & mask1) >> shift)] + (inputChar & mask2); if (index < 7500) theChars = index2; else if (index < 15000) { index = index - 7500; theChars = index2a; } else if (index < 22500){ index = index - 15000; theChars = index2b; } else { index = index - 22500; theChars = index2c; } aChar = theChars.charAt(2*index); outputByte[0] = (byte)((aChar & 0xff00)>>8); outputByte[1] = (byte)(aChar & 0x00ff); aChar = theChars.charAt(2*index + 1); outputByte[2] = (byte)((aChar & 0xff00)>>8); outputByte[3] = (byte)(aChar & 0x00ff); for (i = 0; i < outputByte.length; i++) { if (outputByte[i] != 0x00) { allZeroes = false; break; } } if (allZeroes && inputChar != '\u0000') { return CoderResult.unmappableForLength(1); } int oindex = 0; for (spaceNeeded = outputByte.length; spaceNeeded > 1; spaceNeeded--){ if (outputByte[oindex++] != 0x00 ) break; } if (dp + spaceNeeded > dl) return CoderResult.OVERFLOW; for (i = outputByte.length - spaceNeeded; i < outputByte.length; i++) { da[dp++] = outputByte[i]; } sp++; } return CoderResult.UNDERFLOW; } finally { src.position(sp - src.arrayOffset()); dst.position(dp - dst.arrayOffset()); } }
Example 18
Source File: AllocateDirectInit.java From dragonwell8_jdk with GNU General Public License v2.0 | 4 votes |
private static void printByteBuffer(ByteBuffer bb) { System.out.print("byte ["); for (bb.position(0); bb.position() < bb.limit(); ) System.out.print(" " + Integer.toHexString(bb.get() & 0xff)); System.out.println(" ]"); }
Example 19
Source File: FadvisedFileRegion.java From tez with Apache License 2.0 | 4 votes |
/** * This method transfers data using local buffer. It transfers data from * a disk to a local buffer in memory, and then it transfers data from the * buffer to the target. This is used only if transferTo is disallowed in * the configuration file. super.TransferTo does not perform well on Windows * due to a small IO request generated. customShuffleTransfer can control * the size of the IO requests by changing the size of the intermediate * buffer. */ @VisibleForTesting long customShuffleTransfer(WritableByteChannel target, long position) throws IOException { long actualCount = this.count - position; if (actualCount < 0 || position < 0) { throw new IllegalArgumentException( "position out of range: " + position + " (expected: 0 - " + (this.count - 1) + ')'); } if (actualCount == 0) { return 0L; } long trans = actualCount; int readSize; ByteBuffer byteBuffer = ByteBuffer.allocate(this.shuffleBufferSize); while(trans > 0L && (readSize = fileChannel.read(byteBuffer, this.position+position)) > 0) { //adjust counters and buffer limit if(readSize < trans) { trans -= readSize; position += readSize; byteBuffer.flip(); } else { //We can read more than we need if the actualCount is not multiple //of the byteBuffer size and file is big enough. In that case we cannot //use flip method but we need to set buffer limit manually to trans. byteBuffer.limit((int)trans); byteBuffer.position(0); position += trans; trans = 0; } //write data to the target while(byteBuffer.hasRemaining()) { target.write(byteBuffer); } byteBuffer.clear(); } return actualCount - trans; }
Example 20
Source File: AllocateDirectInit.java From openjdk-jdk9 with GNU General Public License v2.0 | 4 votes |
private static void printByteBuffer(ByteBuffer bb) { System.out.print("byte ["); for (bb.position(0); bb.position() < bb.limit(); ) System.out.print(" " + Integer.toHexString(bb.get() & 0xff)); System.out.println(" ]"); }