public class WrapperInputStream extends InputStream implements InputStreaming
Constructor and Description |
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WrapperInputStream()
Construct an uninitialized WrapperInputStream.
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WrapperInputStream(InputStream in)
Construct a WrapperInputStream that will input from the specified InputStream object.
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Modifier and Type | Method and Description |
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int |
available()
Returns the number of bytes that can be read (or skipped over) from this input stream without causing a blocking I/O condition to occur.
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void |
close()
Close the InputStream and release any system resources associated with it.
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protected InputStream |
ensureInputStream()
Return the underlying InputStream.
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InputStream |
getInputStream()
Obtain the underlying InputStream.
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void |
mark(int cbReadLimit)
Marks the current read position in the InputStream in order to support the stream to be later "rewound" (using the
reset() method) to the current position. |
boolean |
markSupported()
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int |
read()
Read the next byte of data from the InputStream.
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int |
read(byte[] ab)
Read some number of bytes from the input stream and store them into the passed array
ab . |
int |
read(byte[] ab, int of, int cb)
Read up to
cb bytes from the input stream and store them into the passed array ab starting at offset of . |
void |
reset()
Rewind this stream to the position at the time the
mark(int) method was last called on this InputStream. |
protected void |
setInputStream(InputStream in)
Specify the underlying InputSream.
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long |
skip(long cb)
Skips over up to the specified number of bytes of data from this InputStream.
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public WrapperInputStream()
public WrapperInputStream(InputStream in)
in
- an InputStream object to read frompublic InputStream getInputStream()
protected InputStream ensureInputStream()
IllegalStateException
- if the underlying stream has not been specified.protected void setInputStream(InputStream in)
in
- the stream to be wrappedIllegalStateException
- if the underlying stream has already been specified.public int read() throws IOException
int
in the range 0
to 255
. If 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.
read
in interface com.oracle.common.io.InputStreaming
read
in class InputStream
-1
if the end of the stream has been reachedIOException
- if an I/O error occurspublic int read(byte[] ab) throws IOException
ab
. The number of bytes actually read is returned.
This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.
read
in interface com.oracle.common.io.InputStreaming
read
in class InputStream
ab
- the array to store the bytes which are read from the stream-1
if no bytes were read from the stream because the end of the stream had been reachedNullPointerException
- if the passed array is nullIOException
- if an I/O error occurspublic int read(byte[] ab, int of, int cb) throws IOException
cb
bytes from the input stream and store them into the passed array ab
starting at offset of
. The number of bytes actually read is returned.
This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.
read
in interface com.oracle.common.io.InputStreaming
read
in class InputStream
ab
- the array to store the bytes which are read from the streamof
- the offset into the array that the read bytes will be storedcb
- the maximum number of bytes to read-1
if no bytes were read from the stream because the end of the stream had been reachedNullPointerException
- if the passed array is nullIndexOutOfBoundsException
- if of
or cb
is negative, or of+cb
is greater than the length of the ab
IOException
- if an I/O error occurspublic long skip(long cb) throws IOException
skip
in interface com.oracle.common.io.InputStreaming
skip
in class InputStream
cb
- the maximum number of bytes to skip overIOException
- if an I/O error occurspublic int available() throws IOException
available
in interface com.oracle.common.io.InputStreaming
available
in class InputStream
IOException
- if an I/O error occurspublic void close() throws IOException
close
in interface com.oracle.common.io.InputStreaming
close
in interface Closeable
close
in interface AutoCloseable
close
in class InputStream
IOException
- if an I/O error occurspublic void mark(int cbReadLimit)
reset()
method) to the current position. The caller passes in the maximum number of bytes that it expects to read before calling the reset()
method, thus indicating the upper bounds of the responsibility of the stream to be able to buffer what it has read in order to support this functionality.mark
in interface com.oracle.common.io.InputStreaming
mark
in class InputStream
cbReadLimit
- the maximum number of bytes that caller expects the InputStream to be able to read before the mark position becomes invalidpublic void reset() throws IOException
mark(int)
method was last called on this InputStream. If the InputStream cannot fulfill this contract, it should throw an IOException.reset
in interface com.oracle.common.io.InputStreaming
reset
in class InputStream
IOException
- if an I/O error occurs, for example if this has not been marked or if the mark has been invalidatedpublic boolean markSupported()
markSupported
in interface com.oracle.common.io.InputStreaming
markSupported
in class InputStream
true
if this InputStream supports the mark and reset method; false
otherwise