vega.uplink.commanding.itl.gui

Class KeywordMap

java.lang.Object

vega.uplink.commanding.itl.gui.KeywordMap

public final class KeywordMap
extends java.lang.Object

A KeywordMap is similar to a hashtable in that it maps keys to values. However, the `keys' are Swing segments. This allows lookups of text substrings without the overhead of creating a new string object.

This class is used by CTokenMarker to map keywords to ids.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	mapLength DOCUMENT ME!

Constructor Summary

Constructors

Constructor and Description
KeywordMap(boolean ignoreCase) Creates a new KeywordMap.
KeywordMap(boolean ignoreCase, int mapLength) Creates a new KeywordMap.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(java.lang.String keyword, byte id) Adds a key-value mapping.
boolean	getIgnoreCase() Returns true if the keyword map is set to be case insensitive, false otherwise.
protected int	getSegmentMapKey(javax.swing.text.Segment s, int off, int len) DOCUMENT ME!
protected int	getStringMapKey(java.lang.String s) DOCUMENT ME!
byte	lookup(javax.swing.text.Segment text, int offset, int length) Looks up a key.
int	sequenceHash(javax.swing.text.Segment text, int offset, int length)
int	sequenceHash(java.lang.String st)
void	setIgnoreCase(boolean ignoreCase) Sets if the keyword map should be case insensitive.

Methods inherited from class java.lang.Object

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

Field Detail

mapLength

protected int mapLength

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Constructor Detail

KeywordMap

public KeywordMap(boolean ignoreCase)

Creates a new KeywordMap.

Parameters:

ignoreCase - True if keys are case insensitive

KeywordMap

public KeywordMap(boolean ignoreCase,
          int mapLength)

Creates a new KeywordMap.

Parameters:

ignoreCase - True if the keys are case insensitive

mapLength - The number of `buckets' to create. A value of 52 will give good performance for most maps.

Method Detail

setIgnoreCase

public void setIgnoreCase(boolean ignoreCase)

Sets if the keyword map should be case insensitive.

Parameters:

ignoreCase - True if the keyword map should be case insensitive, false otherwise

getIgnoreCase

public boolean getIgnoreCase()

Returns true if the keyword map is set to be case insensitive, false otherwise.

Returns:

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add

public void add(java.lang.String keyword,
       byte id)

Adds a key-value mapping.

Parameters:

keyword - The key

id - The value

sequenceHash

public int sequenceHash(java.lang.String st)

sequenceHash

public int sequenceHash(javax.swing.text.Segment text,
               int offset,
               int length)

lookup

public byte lookup(javax.swing.text.Segment text,
          int offset,
          int length)

Looks up a key.

Parameters:

text - The text segment

offset - The offset of the substring within the text segment

length - The length of the substring

Returns:

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getSegmentMapKey

protected int getSegmentMapKey(javax.swing.text.Segment s,
                   int off,
                   int len)

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Parameters:

s - DOCUMENT ME!

off - DOCUMENT ME!

len - DOCUMENT ME!

Returns:

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getStringMapKey

protected int getStringMapKey(java.lang.String s)

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Parameters:

s - DOCUMENT ME!

Returns:

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