Class AbstractBindingSet

java.lang.Object

org.eclipse.rdf4j.query.AbstractBindingSet

All Implemented Interfaces:

Serializable, Iterable<Binding>, BindingSet

Direct Known Subclasses:

ArrayBindingSet, ListBindingSet, MapBindingSet, QueryBindingSet, SPARQLQueryBindingSet

public abstract class AbstractBindingSet
extends Object
implements BindingSet

Abstract base class for BindingSet implementations, providing a.o. consistent implementations of BindingSet.equals(Object) and BindingSet.hashCode().

Author:

Jeen Broekstra

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
AbstractBindingSet()

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object other)	Compares a BindingSet object to another object.
int	hashCode()	The hash code of a binding is defined as the bit-wise XOR of the hash codes of its bindings:
String	toString()

Methods inherited from class Object

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

Methods inherited from interface BindingSet

getBinding, getBindingNames, getValue, hasBinding, isCompatible, isEmpty, iterator, size

Modifier and Type	Method	Description
Binding	getBinding(String bindingName)	Gets the binding with the specified name from this BindingSet.
Set<String>	getBindingNames()	Gets the names of the bindings in this BindingSet.
Value	getValue(String bindingName)	Gets the value of the binding with the specified name from this BindingSet.
boolean	hasBinding(String bindingName)	Checks whether this BindingSet has a binding with the specified name.
default boolean	isCompatible(BindingSet other)	Check whether this BindingSet is compatible with another.
default boolean	isEmpty()
Iterator<Binding>	iterator()	Creates an iterator over the bindings in this BindingSet.
int	size()	Returns the number of bindings in this BindingSet.

Methods inherited from interface Iterable

forEach, spliterator

Constructor Details

AbstractBindingSet

public AbstractBindingSet()

Method Details

equals

public boolean equals(Object other)

Description copied from interface: BindingSet

Compares a BindingSet object to another object.

Specified by:

equals in interface BindingSet

Overrides:

equals in class Object

Parameters:

other - The object to compare this binding to.

Returns:

true if the other object is an instance of BindingSet and it contains the same set of bindings (disregarding order), false otherwise.

hashCode

public int hashCode()

Description copied from interface: BindingSet

The hash code of a binding is defined as the bit-wise XOR of the hash codes of its bindings:

int hashCode = 0;

for (Binding binding : this) {
        hashCode ˆ= binding.getName().hashCode() ˆ binding.getValue().hashCode();
}

Note: the calculated hash code intentionally does not depend on the order in which the bindings are iterated over.

Specified by:

hashCode in interface BindingSet

Overrides:

hashCode in class Object

Returns:

A hash code for the BindingSet.

toString

public String toString()

Overrides:

toString in class Object