Package com.onec.query

Record Class Path

java.lang.Object
java.lang.Record
com.onec.query.Path
public record Path(Class<?> root, List<String> segments) extends Record
A column reference within a query, expressed as a chain of bean-property hops on the query's from entity.
  • A single segment is a direct attribute — SalesOrder::getNumber → ["number"].
  • Multiple segments are reference navigation: every segment but the last must be a Ref<T> attribute, and the join-walker emits a LEFT JOIN per hop — SalesOrder -> customer -> Customer::getName → ["customer", "name"].

root is the entity the path is rooted on. The fluent builder fills it in from Query.from(...), so DSL helpers can leave it null; a hand-authored QuerySpec should set it explicitly.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Path(Class<?> root, List<String> segments)
    Creates an instance of a Path record class.

  • Method Summary

    Modifier and Type
    Method
    Description
    final boolean
    equals(Object o)
    Indicates whether some other object is "equal to" this one.
    final int
    hashCode()
    Returns a hash code value for this object.
    boolean
    isNavigation()
    True when this path crosses at least one Ref hop.
    static Path
    of(Class<?> root, String... segments)
     
    Class<?>
    root()
    Returns the value of the root record component.
    List<String>
    segments()
    Returns the value of the segments record component.
    String
    tail()
    Terminal segment — the attribute the path ultimately reads.
    final String
    toString()
    Returns a string representation of this record class.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Path

      public Path(Class<?> root, List<String> segments)
      Creates an instance of a Path record class.
      Parameters:
      root - the value for the root record component
      segments - the value for the segments record component

  • Method Details

    • of

      public static Path of(Class<?> root, String... segments)

    • tail

      public String tail()
      Terminal segment — the attribute the path ultimately reads.

    • isNavigation

      public boolean isNavigation()
      True when this path crosses at least one Ref hop.

    • toString

      public final 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.

    • root

      public Class<?> root()
      Returns the value of the root record component.
      Returns:
      the value of the root record component

    • segments

      public List<String> segments()
      Returns the value of the segments record component.
      Returns:
      the value of the segments record component