JavaInputStreamMBS.available as Integer

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Java Database	MBS Java Plugin	13.1	✅ Yes	✅ Yes	✅ Yes	❌ No	Desktop, Console & Web

Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream.

The next invocation might be the same thread or another thread. A single read or skip of this many bytes will not block, but may read or skip fewer bytes.
Note that while some implementations of InputStream will return the total number of bytes in the stream, many will not. It is never correct to use the return value of this method to allocate a buffer intended to hold all data in this stream.

A subclass' implementation of this method may choose to throw an IOException if this input stream has been closed by invoking the close() method.

The available method for class InputStream always returns 0.

This method should be overridden by subclasses.

Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking or 0 when it reaches the end of the input stream.

Throws:
IOException - if an I/O error occurs.

JavaInputStreamMBS.close

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Java Database	MBS Java Plugin	13.1	✅ Yes	✅ Yes	✅ Yes	❌ No	Desktop, Console & Web

Closes this input stream and releases any system resources associated with the stream.

JavaInputStreamMBS.Constructor   Private

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Java Database	MBS Java Plugin	13.1	✅ Yes	✅ Yes	✅ Yes	❌ No	Desktop, Console & Web

The private constructor.

JavaInputStreamMBS.mark(readlimit as Integer)

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Java Database	MBS Java Plugin	13.1	✅ Yes	✅ Yes	✅ Yes	❌ No	Desktop, Console & Web

Marks the current position in this input stream.

A subsequent call to the reset method repositions this stream at the last marked position so that subsequent reads re-read the same bytes.
The readlimit arguments tells this input stream to allow that many bytes to be read before the mark position gets invalidated.

The general contract of mark is that, if the method markSupported returns true, the stream somehow remembers all the bytes read after the call to mark and stands ready to supply those same bytes again if and whenever the method reset is called. However, the stream is not required to remember any data at all if more than readlimit bytes are read from the stream before reset is called.

Marking a closed stream should not have any effect on the stream.

The mark method of InputStream does nothing.

Parameters:
readlimit - the maximum limit of bytes that can be read before the mark position becomes invalid.

JavaInputStreamMBS.markSupported as boolean

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Java Database	MBS Java Plugin	13.1	✅ Yes	✅ Yes	✅ Yes	❌ No	Desktop, Console & Web

Tests if this input stream supports the mark and reset methods.

Whether or not mark and reset are supported is an invariant property of a particular input stream instance. The markSupported method of InputStream returns false.

Returns true if this stream instance supports the mark and reset methods; false otherwise.

JavaInputStreamMBS.read as Integer

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Java Database	MBS Java Plugin	13.1	✅ Yes	✅ Yes	✅ Yes	❌ No	Desktop, Console & Web

Reads the next byte of data from the input stream.

The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.
A subclass must provide an implementation of this method.

Returns the next byte of data, or -1 if the end of the stream is reached.

Throws:
IOException - if an I/O error occurs.

See also:

• read(bytes as JavaByteArrayMBS) as Integer
• read(bytes as JavaByteArrayMBS, Offset as Integer, Length as Integer) as Integer

JavaInputStreamMBS.read(bytes as JavaByteArrayMBS) as Integer

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Java Database	MBS Java Plugin	13.1	✅ Yes	✅ Yes	✅ Yes	❌ No	Desktop, Console & Web

Reads some number of bytes from the input stream and stores them into the buffer array bytes.

The number of bytes actually read is returned as an integer. This method blocks until input data is available, end of file is detected, or an exception is thrown.
If the length of bytes is zero, then no bytes are read and 0 is returned; otherwise, there is an attempt to read at least one byte. If no byte is available because the stream is at the end of the file, the value -1 is returned; otherwise, at least one byte is read and stored into bytes.

The first byte read is stored into element bytes[0], the next one into bytes[1], and so on. The number of bytes read is, at most, equal to the length of bytes. Let k be the number of bytes actually read; these bytes will be stored in elements bytes[0] through bytes[k-1], leaving elements bytes[k] through bytes[bytes.length-1] unaffected.

The read(bytes) method for class InputStream has the same effect as:

read(bytes, 0, bytes.length)

Parameters:
bytes: the buffer into which the data is read.

Returns the total number of bytes read into the buffer, or -1 is there is no more data because the end of the stream has been reached.

Throws:
IOException - If the first byte cannot be read for any reason other than the end of the file, if the input stream has been closed, or if some other I/O error occurs.
NullPointerException - if bytes is null.

See also:

• read as Integer
• read(bytes as JavaByteArrayMBS, Offset as Integer, Length as Integer) as Integer

JavaInputStreamMBS.read(bytes as JavaByteArrayMBS, Offset as Integer, Length as Integer) as Integer

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Java Database	MBS Java Plugin	13.1	✅ Yes	✅ Yes	✅ Yes	❌ No	Desktop, Console & Web

Reads up to Length bytes of data from the input stream into an array of bytes.

An attempt is made to read as many as Length bytes, but a smaller number may be read. The number of bytes actually read is returned as an integer.
This method blocks until input data is available, end of file is detected, or an exception is thrown.

If Length is zero, then no bytes are read and 0 is returned; otherwise, there is an attempt to read at least one byte. If no byte is available because the stream is at end of file, the value -1 is returned; otherwise, at least one byte is read and stored into bytes.

The first byte read is stored into element bytes[Offset], the next one into bytes[Offset+1], and so on. The number of bytes read is, at most, equal to Length. Let k be the number of bytes actually read; these bytes will be stored in elements bytes[Offset] through bytes[Offset+k-1], leaving elements bytes[Offset+k] through bytes[Offset+Length-1] unaffected.

In every case, elements bytes[0] through bytes[Offset] and elements bytes[Offset+Length] through bytes[bytes.length-1] are unaffected.

The read(bytes, Offset, Length) method for class InputStream simply calls the method read() repeatedly. If the first such call results in an IOException, that exception is returned from the call to the read(bytes, Offset, Length) method. If any subsequent call to read() results in a IOException, the exception is caught and treated as if it were end of file; the bytes read up to that point are stored into bytes and the number of bytes read before the exception occurred is returned. The default implementation of this method blocks until the requested amount of input data len has been read, end of file is detected, or an exception is thrown. Subclasses are encouraged to provide a more efficient implementation of this method.

Parameters:
bytes: the buffer into which the data is read.
Offset: the start offset in array bytes at which the data is written.
Length: the maximum number of bytes to read.

Returns the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.

Throws:
IOException - If the first byte cannot be read for any reason other than end of file, or if the input stream has been closed, or if some other I/O error occurs.
NullPointerException - If bytes is null.
IndexOutOfBoundsException - If Offset is negative, Length is negative, or Length is greater than bytes.length - Offset

See also:

• read as Integer
• read(bytes as JavaByteArrayMBS) as Integer

JavaInputStreamMBS.reset

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Java Database	MBS Java Plugin	13.1	✅ Yes	✅ Yes	✅ Yes	❌ No	Desktop, Console & Web

Repositions this stream to the position at the time the mark method was last called on this input stream.

The general contract of reset is:

• If the method markSupported returns true, then:
• If the method mark has not been called since the stream was created, or the number of bytes read from the stream since mark was last called is larger than the argument to mark at that last call, then an IOException might be thrown.
• If such an IOException is not thrown, then the stream is reset to a state such that all the bytes read since the most recent call to mark (or since the start of the file, if mark has not been called) will be resupplied to subsequent callers of the read method, followed by any bytes that otherwise would have been the next input data as of the time of the call to reset.
• If the method markSupported returns false, then:
• The call to reset may throw an IOException.
• If an IOException is not thrown, then the stream is reset to a fixed state that depends on the particular type of the input stream and how it was created. The bytes that will be supplied to subsequent callers of the read method depend on the particular type of the input stream.

The method reset for class InputStream does nothing except throw an IOException.

Throws:
IOException - if this stream has not been marked or if the mark has been invalidated.

JavaInputStreamMBS.skip(count as Int64) as Int64

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	Java Database	MBS Java Plugin	13.1	✅ Yes	✅ Yes	✅ Yes	❌ No	Desktop, Console & Web

Skips over and discards count bytes of data from this input stream.

The skip method may, for a variety of reasons, end up skipping over some smaller number of bytes, possibly 0. This may result from any of a number of conditions; reaching end of file before count bytes have been skipped is only one possibility. The actual number of bytes skipped is returned. If count is negative, no bytes are skipped.
The skip method of this class creates a byte array and then repeatedly reads into it until count bytes have been read or the end of the stream has been reached. Subclasses are encouraged to provide a more efficient implementation of this method. For instance, the implementation may depend on the ability to seek.

Parameters:
count: the number of bytes to be skipped.

Returns the actual number of bytes skipped.

Throws:
IOException - if the stream does not support seek, or if some other I/O error occurs.