org.openqa.jetty.util
Class StringMap

java.lang.Object
  java.util.AbstractMap
      org.openqa.jetty.util.StringMap

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, java.util.Map

public class StringMap
extends java.util.AbstractMap
implements java.io.Externalizable

Map like class of Strings to Objects. This String Map has been optimized for mapping small sets of Strings where the most frequently accessed Strings have been put to the map first. It also has the benefit that it can look up entries by substring or sections of char and byte arrays. This can prevent many String objects from being created just to look up in the map. This map is NOT synchronized.

Version:

$Id: StringMap.java,v 1.13 2004/10/23 09:03:22 gregwilkins Exp $

Author:

Greg Wilkins (gregw)

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V>

Nested classes/interfaces inherited from interface java.util.Map

java.util.Map.Entry<K,V>

Field Summary

protected java.util.HashSet	_entrySet
protected boolean	_ignoreCase
protected org.openqa.jetty.util.StringMap.NullEntry	_nullEntry
protected java.lang.Object	_nullValue
protected org.openqa.jetty.util.StringMap.Node	_root
protected java.util.Set	_umEntrySet
protected int	_width

Constructor Summary

StringMap()
Constructor.

StringMap(boolean ignoreCase)
Constructor.

StringMap(boolean ignoreCase, int width)
Constructor.

Method Summary

void	clear()
boolean	containsKey(java.lang.Object key)
java.util.Set	entrySet()
java.lang.Object	get(java.lang.Object key)
java.lang.Object	get(java.lang.String key)
java.util.Map.Entry	getEntry(byte[] key, int offset, int length) Get a map entry by byte array key.
java.util.Map.Entry	getEntry(char[] key, int offset, int length) Get a map entry by char array key.
java.util.Map.Entry	getEntry(java.lang.String key, int offset, int length) Get a map entry by substring key.
int	getWidth()
boolean	isEmpty()
boolean	isIgnoreCase()
java.lang.Object	put(java.lang.Object key, java.lang.Object value)
java.lang.Object	put(java.lang.String key, java.lang.Object value)
void	readExternal(java.io.ObjectInput in)
java.lang.Object	remove(java.lang.Object key)
java.lang.Object	remove(java.lang.String key)
void	setIgnoreCase(boolean ic) Set the ignoreCase attribute.
void	setWidth(int width) Set the hash width.
int	size()
void	writeExternal(java.io.ObjectOutput out)

Methods inherited from class java.util.AbstractMap

clone, containsValue, equals, hashCode, keySet, putAll, toString, values

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

_width

protected int _width

_root

protected org.openqa.jetty.util.StringMap.Node _root

_ignoreCase

protected boolean _ignoreCase

_nullEntry

protected org.openqa.jetty.util.StringMap.NullEntry _nullEntry

_nullValue

protected java.lang.Object _nullValue

_entrySet

protected java.util.HashSet _entrySet

_umEntrySet

protected java.util.Set _umEntrySet

Constructor Detail

StringMap

public StringMap()

Constructor.

StringMap

public StringMap(boolean ignoreCase)

Constructor.

Parameters:

ignoreCase -

StringMap

public StringMap(boolean ignoreCase,
                 int width)

Constructor.

Parameters:

ignoreCase -

width - Width of hash tables, larger values are faster but use more memory.

Method Detail

setIgnoreCase

public void setIgnoreCase(boolean ic)

Set the ignoreCase attribute.

Parameters:

ic - If true, the map is case insensitive for keys.

isIgnoreCase

public boolean isIgnoreCase()

setWidth

public void setWidth(int width)

Set the hash width.

Parameters:

width - Width of hash tables, larger values are faster but use more memory.

getWidth

public int getWidth()

put

public java.lang.Object put(java.lang.Object key,
                            java.lang.Object value)

Specified by:

put in interface java.util.Map

Overrides:

put in class java.util.AbstractMap

put

public java.lang.Object put(java.lang.String key,
                            java.lang.Object value)

get

public java.lang.Object get(java.lang.Object key)

Specified by:

get in interface java.util.Map

Overrides:

get in class java.util.AbstractMap

get

public java.lang.Object get(java.lang.String key)

getEntry

public java.util.Map.Entry getEntry(java.lang.String key,
                                    int offset,
                                    int length)

Get a map entry by substring key.

Parameters:

key - String containing the key

offset - Offset of the key within the String.

length - The length of the key

Returns:

The Map.Entry for the key or null if the key is not in the map.

getEntry

public java.util.Map.Entry getEntry(char[] key,
                                    int offset,
                                    int length)

Get a map entry by char array key.

Parameters:

key - char array containing the key

offset - Offset of the key within the array.

length - The length of the key

Returns:

The Map.Entry for the key or null if the key is not in the map.

getEntry

public java.util.Map.Entry getEntry(byte[] key,
                                    int offset,
                                    int length)

Get a map entry by byte array key.

Parameters:

key - byte array containing the key. A simple ASCII byte to char mapping is used.

offset - Offset of the key within the array.

length - The length of the key

Returns:

The Map.Entry for the key or null if the key is not in the map.

remove

public java.lang.Object remove(java.lang.Object key)

Specified by:

remove in interface java.util.Map

Overrides:

remove in class java.util.AbstractMap

remove

public java.lang.Object remove(java.lang.String key)

entrySet

public java.util.Set entrySet()

Specified by:

entrySet in interface java.util.Map

Specified by:

entrySet in class java.util.AbstractMap

size

public int size()

Specified by:

size in interface java.util.Map

Overrides:

size in class java.util.AbstractMap

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map

Overrides:

isEmpty in class java.util.AbstractMap

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map

Overrides:

containsKey in class java.util.AbstractMap

clear

public void clear()

Specified by:

clear in interface java.util.Map

Overrides:

clear in class java.util.AbstractMap

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Specified by:

writeExternal in interface java.io.Externalizable

Throws:

java.io.IOException

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Specified by:

readExternal in interface java.io.Externalizable

Throws:

java.io.IOException

java.lang.ClassNotFoundException