Module org.apache.jena.arq
Package org.apache.jena.sparql.engine.binding

Interface Binding

All Known Implementing Classes:
Binding0, Binding1, Binding2, Binding3, Binding4, BindingBase, BindingOverMap, BindingProject, BindingProjectBase, BindingProjectNamed, BindingRoot
public interface Binding
Interface encapsulating a mapping from a name to a value.

A Binding is a map from Var to Node. It can have a parent, meaning this binding extends (adds new var/node pairs) another. The operation get(java.lang.String) looks in this binding, then looks in the parent recursively. Bindings are immutable. Bindings provide value-based equality and hash code.

See Also:

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final Binding
    noParent
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static BindingBuilder
    builder()
    Create a BindingBuilder
    static BindingBuilder
    builder(Binding parent)
    Create a BindingBuilder
    default boolean
    contains(String varName)
    Test whether a variable is bound to some object
    boolean
    contains(Var var)
    Test whether a variable is bound to some object
    Binding
    detach()
    Returns a binding which is guaranteed to be independent of any resources such as an ongoing query execution or a disk-based dataset.
    boolean
    equals(Object other)
     
    void
    forEach(BiConsumer<Var,org.apache.jena.graph.Node> action)
    Operate on each entry.
    default org.apache.jena.graph.Node
    get(String varName)
    Return the object bound to a variable, or null
    org.apache.jena.graph.Node
    get(Var var)
    Return the object bound to a variable, or null
    int
    hashCode()
     
    boolean
    isEmpty()
    Is this an empty binding?
    int
    size()
    Number of (var, value) pairs.
    Iterator<Var>
    vars()
    Iterate over all variables of this binding.
    Set<Var>
    varsMentioned()
    Collect all variables of this binding.

  • Field Details

    • noParent

      static final Binding noParent

  • Method Details

    • builder

      static BindingBuilder builder()
      Create a BindingBuilder

    • builder

      static BindingBuilder builder(Binding parent)
      Create a BindingBuilder

    • vars

      Iterator<Var> vars()
      Iterate over all variables of this binding.

    • varsMentioned

      Set<Var> varsMentioned()
      Collect all variables of this binding.

    • forEach

      void forEach(BiConsumer<Var,org.apache.jena.graph.Node> action)
      Operate on each entry.

    • contains

      boolean contains(Var var)
      Test whether a variable is bound to some object

    • get

      default org.apache.jena.graph.Node get(String varName)
      Return the object bound to a variable, or null

    • contains

      default boolean contains(String varName)
      Test whether a variable is bound to some object

    • get

      org.apache.jena.graph.Node get(Var var)
      Return the object bound to a variable, or null

    • size

      int size()
      Number of (var, value) pairs.

    • isEmpty

      boolean isEmpty()
      Is this an empty binding? No variables.

    • hashCode

      int hashCode()
      Overrides:
      hashCode in class Object

    • equals

      boolean equals(Object other)
      Overrides:
      equals in class Object

    • detach

      Binding detach()
      Returns a binding which is guaranteed to be independent of any resources such as an ongoing query execution or a disk-based dataset. May return itself if it is already detached.