- java.lang.Object
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- java.io.InputStream
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- org.snmp4j.asn1.BERInputStream
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- All Implemented Interfaces:
java.io.Closeable,java.lang.AutoCloseable
public class BERInputStream extends java.io.InputStreamTheBERInputStreamclass wraps aByteBufferand implements theInputStreamabstract class. positions in the input stream.- Version:
- 1.6.1
- Author:
- Frank Fock
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Constructor Summary
Constructors Constructor Description BERInputStream(java.nio.ByteBuffer buffer)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description intavailable()Returns the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream.voidclose()Closes this input stream and releases any system resources associated with the stream.intgetAvailableBytes()Gets the total number of bytes that can be read from this input stream.java.nio.ByteBuffergetBuffer()longgetPosition()Gets the current position in the underlyingbuffer.booleanisMarked()Checks whether a mark has been set on the input stream.voidmark(int readlimit)Marks the current position in this input stream.booleanmarkSupported()Tests if this input stream supports themarkandresetmethods.intread()intread(byte[] b)Reads some number of bytes from the input stream and stores them into the buffer arrayb.intread(byte[] b, int off, int len)Reads up tolenbytes of data from the input stream into an array of bytes.voidreset()Repositions this stream to the position at the time themarkmethod was last called on this input stream.voidsetBuffer(java.nio.ByteBuffer buf)longskip(long n)Skips over and discardsnbytes of data from this input stream.
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Method Detail
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getBuffer
public java.nio.ByteBuffer getBuffer()
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setBuffer
public void setBuffer(java.nio.ByteBuffer buf)
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read
public int read() throws java.io.IOException- Specified by:
readin classjava.io.InputStream- Throws:
java.io.IOException
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available
public int available() throws java.io.IOExceptionReturns the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream.- Overrides:
availablein classjava.io.InputStream- Returns:
- the number of bytes that can be read from this input stream without blocking.
- Throws:
java.io.IOException- if an I/O error occurs.
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close
public void close() throws java.io.IOExceptionCloses this input stream and releases any system resources associated with the stream.- Specified by:
closein interfacejava.lang.AutoCloseable- Specified by:
closein interfacejava.io.Closeable- Overrides:
closein classjava.io.InputStream- Throws:
java.io.IOException- if an I/O error occurs.
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mark
public void mark(int readlimit)
Marks the current position in this input stream.- Overrides:
markin classjava.io.InputStream- Parameters:
readlimit- the maximum limit of bytes that can be read before the mark position becomes invalid.
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markSupported
public boolean markSupported()
Tests if this input stream supports themarkandresetmethods.- Overrides:
markSupportedin classjava.io.InputStream- Returns:
trueif this stream instance supports the mark and reset methods;falseotherwise.
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read
public int read(byte[] b) throws java.io.IOExceptionReads some number of bytes from the input stream and stores them into the buffer arrayb.- Overrides:
readin classjava.io.InputStream- Parameters:
b- the buffer into which the data is read.- Returns:
- the total number of bytes read into the buffer, or
-1is there is no more data because the end of the stream has been reached. - Throws:
java.io.IOException- if an I/O error occurs.
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read
public int read(byte[] b, int off, int len) throws java.io.IOExceptionReads up tolenbytes of data from the input stream into an array of bytes.- Overrides:
readin classjava.io.InputStream- Parameters:
b- the buffer into which the data is read.off- the start offset in arraybat which the data is written.len- the maximum number of bytes to read.- Returns:
- the total number of bytes read into the buffer, or
-1if there is no more data because the end of the stream has been reached. - Throws:
java.io.IOException- if an I/O error occurs.
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reset
public void reset() throws java.io.IOExceptionRepositions this stream to the position at the time themarkmethod was last called on this input stream.- Overrides:
resetin classjava.io.InputStream- Throws:
java.io.IOException- if this stream has not been marked or if the mark has been invalidated.
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skip
public long skip(long n) throws java.io.IOExceptionSkips over and discardsnbytes of data from this input stream.- Overrides:
skipin classjava.io.InputStream- Parameters:
n- the number of bytes to be skipped.- Returns:
- the actual number of bytes skipped.
- Throws:
java.io.IOException- if an I/O error occurs.
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getPosition
public long getPosition()
Gets the current position in the underlyingbuffer.- Returns:
buffer.position().
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isMarked
public boolean isMarked()
Checks whether a mark has been set on the input stream. This can be used to determine whether the value returned byavailable()is limited by a readlimit set when the mark has been set.- Returns:
- always
true. If no mark has been set explicitly, the mark is set to the initial position (i.e. zero).
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getAvailableBytes
public int getAvailableBytes()
Gets the total number of bytes that can be read from this input stream.- Returns:
- the number of bytes that can be read from this stream.
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