org.apache.lucene.analysis
Class CharArraySet

java.lang.Object
  java.util.AbstractCollection<E>
      java.util.AbstractSet
          org.apache.lucene.analysis.CharArraySet

All Implemented Interfaces:

Iterable, Collection, Set

public class CharArraySet
extends AbstractSet

A simple class that stores Strings as char[]'s in a hash table. Note that this is not a general purpose class. For example, it cannot remove items from the set, nor does it resize its hash table to be smaller, etc. It is designed to be quick to test if a char[] is in the set without the necessity of converting it to a String first.

Nested Class Summary

class

CharArraySet.CharArraySetIterator The Iterator for this set.

Constructor Summary

CharArraySet(Collection c, boolean ignoreCase)
Create set from a Collection of char[] or String

CharArraySet(int startSize, boolean ignoreCase)
Create set with enough capacity to hold startSize terms

Method Summary

boolean	add(char[] text) Add this char[] directly to the set.
boolean	add(CharSequence text) Add this CharSequence into the set
boolean	add(Object o)
boolean	add(String text) Add this String into the set
boolean	contains(char[] text, int off, int len) true if the len chars of text starting at off are in the set
boolean	contains(CharSequence cs) true if the CharSequence is in the set
boolean	contains(Object o)
boolean	isEmpty()
Iterator	iterator()
int	size()
static CharArraySet	unmodifiableSet(CharArraySet set) Returns an unmodifiable CharArraySet.

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

addAll, clear, containsAll, remove, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

addAll, clear, containsAll, remove, retainAll, toArray, toArray

Constructor Detail

CharArraySet

public CharArraySet(int startSize,
                    boolean ignoreCase)

Create set with enough capacity to hold startSize terms

CharArraySet

public CharArraySet(Collection c,
                    boolean ignoreCase)

Create set from a Collection of char[] or String

Method Detail

contains

public boolean contains(char[] text,
                        int off,
                        int len)

true if the len chars of text starting at off are in the set

contains

public boolean contains(CharSequence cs)

true if the CharSequence is in the set

add

public boolean add(CharSequence text)

Add this CharSequence into the set

add

public boolean add(String text)

Add this String into the set

add

public boolean add(char[] text)

Add this char[] directly to the set. If ignoreCase is true for this Set, the text array will be directly modified. The user should never modify this text array after calling this method.

size

public int size()

Specified by:

size in interface Collection

Specified by:

size in interface Set

Specified by:

size in class AbstractCollection

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection

Specified by:

isEmpty in interface Set

Overrides:

isEmpty in class AbstractCollection

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection

Specified by:

contains in interface Set

Overrides:

contains in class AbstractCollection

add

public boolean add(Object o)

Specified by:

add in interface Collection

Specified by:

add in interface Set

Overrides:

add in class AbstractCollection

unmodifiableSet

public static CharArraySet unmodifiableSet(CharArraySet set)

Returns an unmodifiable CharArraySet. This allows to provide unmodifiable views of internal sets for "read-only" use.

Parameters:

set - a set for which the unmodifiable set is returned.

Returns:

an new unmodifiable CharArraySet.

Throws:

NullPointerException - if the given set is null.

iterator

public Iterator iterator()

Specified by:

iterator in interface Iterable

Specified by:

iterator in interface Collection

Specified by:

iterator in interface Set

Specified by:

iterator in class AbstractCollection