Java Utililty Methods ByteBuffer Read

List of utility methods to do ByteBuffer Read

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Description

The list of methods to do ByteBuffer Read are organized into topic(s).

Method

voidassertReadyForFreshRead(ByteBuffer b)
Ensure that a buffer is prepared for reading from the beginning. 
assert (b.limit() != 0); 
assert (b.position() == 0);
intc_read(Channel fd, ByteBuffer buffer, int count)
read 
try {
    ReadableByteChannel rc = (ReadableByteChannel) fd;
    buffer = buffer.duplicate();
    buffer.limit(buffer.position() + count);
    return rc.read(buffer);
} catch (Exception e) {
    e.printStackTrace();
    return -1;
...
voidcheckNotReadOnly(ByteBuffer buffer)
check Not Read Only 
if (buffer.isReadOnly()) {
    throw new ReadOnlyBufferException();
StringcontentOfUnreadBuffer(final ByteBuffer buffer)
content of unread byte buffer, hex representation using ByteBuffer#getInt() 
int position = buffer.position();
int limit = buffer.limit();
StringBuffer sb = new StringBuffer();
while (buffer.hasRemaining()) {
    sb.append(Integer.toHexString(buffer.getInt()));
buffer.position(position);
buffer.limit(limit);
...
ByteBufferenlargeThreadLocalByteBuffer()
Double the thread local buffer capacity. 
TMP_BUFFER.set(ByteBuffer.allocate(TMP_BUFFER.get().capacity() * 2));
return TMP_BUFFER.get();
voidparseEsInfo(ByteBuffer read)
parse Es Info 
intread(@Nonnull final FileChannel src, @Nonnull final ByteBuffer dst, @Nonnegative final long position)
Read until dst buffer is filled or src channel is reached end. 

int count = 0;
long offset = position;
while (dst.remaining() > 0) {
    int n = src.read(dst, offset);
    if (n == -1) {
        break;
    offset += n;
...

intread(ByteBuffer b)
read

int result = (b.get() & 0xFF);
return result;

voidread(ByteBuffer bb, FileChannel ch)
read

bb.clear();
ch.read(bb);
bb.flip();

longread(ByteBuffer bb, int elementWidth)
read

final long value = readBE(bb, elementWidth);
if (bb.order() == ByteOrder.BIG_ENDIAN) {
    return value;
return swap(elementWidth, value);