org.openrdf.query.impl

Class MapBindingSet

java.lang.Object

org.openrdf.query.impl.MapBindingSet

All Implemented Interfaces:

java.io.Serializable, java.lang.Iterable<Binding>, BindingSet

public class MapBindingSet
extends java.lang.Object
implements BindingSet

A Map-based implementation of the BindingSet interface.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MapBindingSet()
MapBindingSet(int capacity) Creates a new Map-based BindingSet with the specified initial capacity.

Method Summary

Methods

Modifier and Type	Method and Description
void	addBinding(Binding binding) Adds a binding to the binding set.
void	addBinding(java.lang.String name, Value value) Adds a binding to the binding set.
void	clear() Removes all bindings from the binding set.
boolean	equals(java.lang.Object other) Compares a BindingSet object to another object.
Binding	getBinding(java.lang.String bindingName) Gets the binding with the specified name from this BindingSet.
java.util.Set<java.lang.String>	getBindingNames() Gets the names of the bindings in this BindingSet.
Value	getValue(java.lang.String bindingName) Gets the value of the binding with the specified name from this BindingSet.
boolean	hasBinding(java.lang.String bindingName) Checks whether this BindingSet has a binding with the specified name.
int	hashCode() The hash code of a binding is defined as the bit-wise XOR of the hash codes of its bindings:
java.util.Iterator<Binding>	iterator() Creates an iterator over the bindings in this BindingSet.
void	removeBinding(java.lang.String name) Removes a binding from the binding set.
int	size() Returns the number of bindings in this BindingSet.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

MapBindingSet

public MapBindingSet()

MapBindingSet

public MapBindingSet(int capacity)

Creates a new Map-based BindingSet with the specified initial capacity. Bindings can be added to this binding set using the addBinding(java.lang.String, org.openrdf.model.Value) methods.

Parameters:

capacity - The initial capacity of the created BindingSet object.

Method Detail

addBinding

public void addBinding(java.lang.String name,
              Value value)

Adds a binding to the binding set.

Parameters:

name - The binding's name.

value - The binding's value.

addBinding

public void addBinding(Binding binding)

Adds a binding to the binding set.

Parameters:

binding - The binding to add to the binding set.

removeBinding

public void removeBinding(java.lang.String name)

Removes a binding from the binding set.

Parameters:

name - The binding's name.

clear

public void clear()

Removes all bindings from the binding set.

iterator

public java.util.Iterator<Binding> iterator()

Description copied from interface: BindingSet

Creates an iterator over the bindings in this BindingSet. This only returns bindings with non-null values. An implementation is free to return the bindings in arbitrary order.

Specified by:

iterator in interface java.lang.Iterable<Binding>

Specified by:

iterator in interface BindingSet

getBindingNames

public java.util.Set<java.lang.String> getBindingNames()

Description copied from interface: BindingSet

Gets the names of the bindings in this BindingSet.

Specified by:

getBindingNames in interface BindingSet

Returns:

A set of binding names.

getBinding

public Binding getBinding(java.lang.String bindingName)

Description copied from interface: BindingSet

Gets the binding with the specified name from this BindingSet.

Specified by:

getBinding in interface BindingSet

Parameters:

bindingName - The name of the binding.

Returns:

The binding with the specified name, or null if there is no such binding in this BindingSet.

hasBinding

public boolean hasBinding(java.lang.String bindingName)

Description copied from interface: BindingSet

Checks whether this BindingSet has a binding with the specified name.

Specified by:

hasBinding in interface BindingSet

Parameters:

bindingName - The name of the binding.

Returns:

true if this BindingSet has a binding with the specified name, false otherwise.

getValue

public Value getValue(java.lang.String bindingName)

Description copied from interface: BindingSet

Gets the value of the binding with the specified name from this BindingSet.

Specified by:

getValue in interface BindingSet

Parameters:

bindingName - The name of the binding.

Returns:

The value of the binding with the specified name, or null if there is no such binding in this BindingSet.

size

public int size()

Description copied from interface: BindingSet

Returns the number of bindings in this BindingSet.

Specified by:

size in interface BindingSet

Returns:

The number of bindings in this BindingSet.

equals

public boolean equals(java.lang.Object other)

Description copied from interface: BindingSet

Compares a BindingSet object to another object.

Specified by:

equals in interface BindingSet

Overrides:

equals in class java.lang.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.hashCode();
 }
 

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

Specified by:

hashCode in interface BindingSet

Overrides:

hashCode in class java.lang.Object

Returns:

A hash code for the BindingSet.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object