Package org.openl.util.fast

Class FastStringReader

java.lang.Object
java.io.Reader
org.openl.util.fast.FastStringReader
All Implemented Interfaces:
Closeable, AutoCloseable, Readable
public class FastStringReader extends Reader

  • Field Summary

    Fields inherited from class java.io.Reader

    lock

  • Constructor Summary

    Constructors
    Constructor
    Description
    FastStringReader(String s)
    Creates a new string reader.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    close()
    Closes the stream and releases any system resources associated with it.
    void
    mark(int readAheadLimit)
    Marks the present position in the stream.
    boolean
    markSupported()
    Tells whether this stream supports the mark() operation, which it does.
    int
    read()
    Reads a single character.
    int
    read(char[] cbuf, int off, int len)
    Reads characters into a portion of an array.
    boolean
    ready()
    Tells whether this stream is ready to be read.
    void
    reset()
    Resets the stream to the most recent mark, or to the beginning of the string if it has never been marked.
    long
    skip(long ns)
    Skips the specified number of characters in the stream.

    Methods inherited from class java.io.Reader

    nullReader, read, read, transferTo

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • FastStringReader

      public FastStringReader(String s)
      Creates a new string reader.
      Parameters:
      s - String providing the character stream.

  • Method Details

    • read

      public int read() throws IOException
      Reads a single character.
      Overrides:
      read in class Reader
      Returns:
      The character read, or -1 if the end of the stream has been reached
      Throws:
      IOException - If an I/O error occurs

    • read

      public int read(char[] cbuf, int off, int len) throws IOException
      Reads characters into a portion of an array.
      Specified by:
      read in class Reader
      Parameters:
      cbuf - Destination buffer
      off - Offset at which to start writing characters
      len - Maximum number of characters to read
      Returns:
      The number of characters read, or -1 if the end of the stream has been reached
      Throws:
      IOException - If an I/O error occurs

    • skip

      public long skip(long ns) throws IOException
      Skips the specified number of characters in the stream. Returns the number of characters that were skipped.

      The ns parameter may be negative, even though the skip method of the Reader superclass throws an exception in this case. Negative values of ns cause the stream to skip backwards. Negative return values indicate a skip backwards. It is not possible to skip backwards past the beginning of the string.

      If the entire string has been read or skipped, then this method has no effect and always returns 0.

      Overrides:
      skip in class Reader
      Throws:
      IOException - If an I/O error occurs

    • ready

      public boolean ready() throws IOException
      Tells whether this stream is ready to be read.
      Overrides:
      ready in class Reader
      Returns:
      True if the next read() is guaranteed not to block for input
      Throws:
      IOException - If the stream is closed

    • markSupported

      public boolean markSupported()
      Tells whether this stream supports the mark() operation, which it does.
      Overrides:
      markSupported in class Reader

    • mark

      public void mark(int readAheadLimit) throws IOException
      Marks the present position in the stream. Subsequent calls to reset() will reposition the stream to this point.
      Overrides:
      mark in class Reader
      Parameters:
      readAheadLimit - Limit on the number of characters that may be read while still preserving the mark. Because the stream's input comes from a string, there is no actual limit, so this argument must not be negative, but is otherwise ignored.
      Throws:
      IllegalArgumentException - If readAheadLimit is invalid input: '<' 0
      IOException - If an I/O error occurs

    • reset

      public void reset() throws IOException
      Resets the stream to the most recent mark, or to the beginning of the string if it has never been marked.
      Overrides:
      reset in class Reader
      Throws:
      IOException - If an I/O error occurs

    • close

      public void close()
      Closes the stream and releases any system resources associated with it. Once the stream has been closed, further read(), ready(), mark(), or reset() invocations will throw an IOException. Closing a previously closed stream has no effect.
      Specified by:
      close in interface AutoCloseable
      Specified by:
      close in interface Closeable
      Specified by:
      close in class Reader