gov.nist.nlpir.irf.util
Class StringTable

java.lang.Object
  |
  +--gov.nist.nlpir.irf.util.StringTable

public class StringTable

extends java.lang.Object

This class implements a table of unique strings read from a file in the format described below. removal.

Version:

$Revision: 1.1 $

Author:

This software was produced by NIST, an agency of the U.S. government, and by statute is not subject to copyright in the United States. Recipients of this software assume all responsibilities associated with its operation, modification and maintenance.

Field Summary

private static int	EOF Working copy of end of file marker value
private java.util.Hashtable	table Table of strings - key is the string, value is always 0

Constructor Summary

StringTable(java.lang.String fileName)
Creates the StringTable from a file.

Method Summary

boolean	containsString(java.lang.String stringToLookUp) Tests whether the given string is in the table or not.
void	present() Presents the contents of the string table.
int	size() Gets number of strings in string table.

Methods inherited from class java.lang.Object

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

Field Detail

table

private java.util.Hashtable table

Table of strings - key is the string, value is always 0

EOF

private static int EOF

Working copy of end of file marker value

Constructor Detail

StringTable

public StringTable(java.lang.String fileName)
            throws java.io.IOException

Creates the StringTable from a file. The file must contain the list of terms. A term is a sequence of letters and/or digits. Terms must be separated by one or more chars which are not letters/digits. If file cannot be opened, constructor returns with empty stringtable (size() = 0)

Parameters:

filename - the name of the file used.

Throws:

java.io.IOException - if the file cannot be read

Method Detail

size

public int size()

Gets number of strings in string table.

Returns:

number of strings in string table

present

public void present()

Presents the contents of the string table.

containsString

public boolean containsString(java.lang.String stringToLookUp)

Tests whether the given string is in the table or not.

Returns:

true if the word is in the table,
false otherwise.