Record Class Transition

java.lang.Object
java.lang.Record
it.tugamer89.autogex.core.Transition
Record Components:
from - The starting state of the transition.
symbol - The symbol read during the transition (null indicates an epsilon transition).
to - The destination state.
public record Transition(State from, Character symbol, State to) extends Record
Represents a single transition from one state to another by reading a symbol.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Transition(State from, Character symbol, State to)
    Creates an instance of a Transition record class.

  • Method Summary

    Modifier and Type
    Method
    Description
    final boolean
    equals(Object o)
    Indicates whether some other object is "equal to" this one.
    State
    from()
    Returns the value of the from record component.
    final int
    hashCode()
    Returns a hash code value for this object.
    boolean
    isEpsilon()
    Checks if this is a silent transition.
    Character
    symbol()
    Returns the value of the symbol record component.
    State
    to()
    Returns the value of the to record component.
    String
    toString()
    Returns a string representation of this record class.

    Methods inherited from class Object

    getClass, notify, notifyAll, wait, wait, wait

  • Constructor Details

    • Transition

      public Transition(State from, Character symbol, State to)
      Creates an instance of a Transition record class.
      Parameters:
      from - the value for the from record component
      symbol - the value for the symbol record component
      to - the value for the to record component

  • Method Details

    • isEpsilon

      public boolean isEpsilon()
      Checks if this is a silent transition. We use 'null' to represent epsilon (ε).
      Returns:
      true if it is an epsilon transition, false otherwise.

    • toString

      public String toString()
      Returns a string representation of this record class. The representation contains the name of the class, followed by the name and value of each of the record components.
      Specified by:
      toString in class Record
      Returns:
      a string representation of this object

    • hashCode

      public final int hashCode()
      Returns a hash code value for this object. The value is derived from the hash code of each of the record components.
      Specified by:
      hashCode in class Record
      Returns:
      a hash code value for this object

    • equals

      public final boolean equals(Object o)
      Indicates whether some other object is "equal to" this one. The objects are equal if the other object is of the same class and if all the record components are equal. All components in this record class are compared with Objects::equals(Object,Object).
      Specified by:
      equals in class Record
      Parameters:
      o - the object with which to compare
      Returns:
      true if this object is the same as the o argument; false otherwise.

    • from

      public State from()
      Returns the value of the from record component.
      Returns:
      the value of the from record component

    • symbol

      public Character symbol()
      Returns the value of the symbol record component.
      Returns:
      the value of the symbol record component

    • to

      public State to()
      Returns the value of the to record component.
      Returns:
      the value of the to record component