org.apache.lucene.util.automaton

Class Transition

java.lang.Object

org.apache.lucene.util.automaton.Transition

All Implemented Interfaces:

java.lang.Cloneable

public class Transition
extends java.lang.Object
implements java.lang.Cloneable

Automaton transition.

A transition, which belongs to a source state, consists of a Unicode codepoint interval and a destination state.

Field Summary

Fields

Modifier and Type	Field and Description
static java.util.Comparator<Transition>	CompareByDestThenMinMax
static java.util.Comparator<Transition>	CompareByMinMaxThenDest

Constructor Summary

Constructors

Constructor and Description
Transition(int min, int max, State to) Constructs a new transition.
Transition(int c, State to) Constructs a new singleton interval transition.

Method Summary

Modifier and Type	Method and Description
Transition	clone() Clones this transition.
boolean	equals(java.lang.Object obj) Checks for equality.
State	getDest() Returns destination of this transition.
int	getMax() Returns maximum of this transition interval.
int	getMin() Returns minimum of this transition interval.
int	hashCode() Returns hash code.
java.lang.String	toString() Returns a string describing this state.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Field Detail

CompareByDestThenMinMax

public static final java.util.Comparator<Transition> CompareByDestThenMinMax

CompareByMinMaxThenDest

public static final java.util.Comparator<Transition> CompareByMinMaxThenDest

Constructor Detail

Transition

public Transition(int c,
                  State to)

Constructs a new singleton interval transition.

Parameters:

c - transition codepoint

to - destination state

Transition

public Transition(int min,
                  int max,
                  State to)

Constructs a new transition. Both end points are included in the interval.

Parameters:

min - transition interval minimum

max - transition interval maximum

to - destination state

Method Detail

getMin

public int getMin()

Returns minimum of this transition interval.

getMax

public int getMax()

Returns maximum of this transition interval.

getDest

public State getDest()

Returns destination of this transition.

equals

public boolean equals(java.lang.Object obj)

Checks for equality.

Overrides:

equals in class java.lang.Object

Parameters:

obj - object to compare with

Returns:

true if obj is a transition with same character interval and destination state as this transition.

hashCode

public int hashCode()

Returns hash code. The hash code is based on the character interval (not the destination state).

Overrides:

hashCode in class java.lang.Object

Returns:

hash code

clone

public Transition clone()

Clones this transition.

Overrides:

clone in class java.lang.Object

Returns:

clone with same character interval and destination state

toString

public java.lang.String toString()

Returns a string describing this state. Normally invoked via Automaton.toString().

Overrides:

toString in class java.lang.Object