- java.lang.Object
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- java.io.InputStream
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- org.hsqldb.lib.AsciiInputStream
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- All Implemented Interfaces:
java.io.Closeable,java.lang.AutoCloseable
public class AsciiInputStream extends java.io.InputStreamAn input stream that reads US-ASCII values from a Reader, in compliance with the Java US_ASCII Charset encoder, including utf-16-surrogate-pairs.- Since:
- 2.7.1
- Author:
- Campbell Burnet (campbell-burnet@users dot sourceforge.net)
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Field Summary
Fields Modifier and Type Field Description static intASCII_BITSis 7;static intASCII_MASKis 0b01111111static intASCII_MAXis 2^7 - 1 (127)static intNON_ASCII_MINis 2^7 (128)static intNON_ASCII_REPLACEMENTis '?'
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Constructor Summary
Constructors Constructor Description AsciiInputStream(java.io.Reader reader)Constructs a new instance for the given reader.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidclose()intread()Reads the next byte of data from the input stream.
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Field Detail
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ASCII_BITS
public static final int ASCII_BITS
is 7;- See Also:
- Constant Field Values
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ASCII_MASK
public static final int ASCII_MASK
is 0b01111111- See Also:
- Constant Field Values
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ASCII_MAX
public static final int ASCII_MAX
is 2^7 - 1 (127)- See Also:
- Constant Field Values
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NON_ASCII_MIN
public static final int NON_ASCII_MIN
is 2^7 (128)- See Also:
- Constant Field Values
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NON_ASCII_REPLACEMENT
public static final int NON_ASCII_REPLACEMENT
is '?'- See Also:
- Constant Field Values
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Method Detail
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close
public void close() throws java.io.IOException- Specified by:
closein interfacejava.lang.AutoCloseable- Specified by:
closein interfacejava.io.Closeable- Overrides:
closein classjava.io.InputStream- Throws:
java.io.IOException
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read
public int read() throws java.io.IOExceptionReads the next byte of data from the input stream. The value byte is returned as anintin the range0toASCII_MAX. If no byte is available because the end of the stream has been reached, the value-1is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.UTF-16 characters above
ASCII_MAXproduce aNON_ASCII_REPLACEMENTvalue when read.Surrogate pairs are correctly counted as a single character and produce a single
NON_ASCII_REPLACEMENTvalue when read.- Specified by:
readin classjava.io.InputStream- Returns:
- the next byte of data, or
-1if the end of the stream is reached. - Throws:
java.io.IOException- if an I/O error occurs.
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