Package gnu.mapping

Class NamedLocation<T>

java.lang.Object

gnu.mapping.Location<T>

gnu.mapping.IndirectableLocation<T>

gnu.mapping.NamedLocation<T>

All Implemented Interfaces:

EnvironmentKey, java.util.Map.Entry<EnvironmentKey,T>

Direct Known Subclasses:

AbstractScriptEngineFactory.BindingsLocation, DynamicLocation, PlainLocation, SharedLocation, ThreadLocation

public abstract class NamedLocation<T>
extends IndirectableLocation<T>
implements java.util.Map.Entry<EnvironmentKey,T>, EnvironmentKey

A Location that can be used as an entry in an Environment.

Field Summary

Fields inherited from class gnu.mapping.IndirectableLocation

base, DIRECT_ON_SET, INDIRECT_FLUIDS, value

Fields inherited from class gnu.mapping.Location

UNBOUND

Fields inherited from interface gnu.mapping.EnvironmentKey

FUNCTION

Constructor Summary

Constructors

Constructor	Description
NamedLocation(NamedLocation loc)
NamedLocation(Symbol name, java.lang.Object property)

Method Summary

Modifier and Type	Method	Description
boolean	entered()	True if directly entered in an Environment.
boolean	equals(java.lang.Object x)
Environment	getEnvironment()
EnvironmentKey	getKey()
java.lang.Object	getKeyProperty()
Symbol	getKeySymbol()
int	hashCode()
boolean	matches(EnvironmentKey key)
boolean	matches(Symbol symbol, java.lang.Object property)
void	setRestore(java.lang.Object oldValue)	Restore an old value.
java.lang.Object	setWithSave(T newValue)	Set a value, but return cookie so old value can be restored.

Methods inherited from class gnu.mapping.IndirectableLocation

getBase, getBaseForce, isConstant, setAlias, setBase, undefine

Methods inherited from class gnu.mapping.Location

define, get, get, getValue, isBound, make, make, make, print, set, setValue, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map.Entry

getValue, setValue

Constructor Detail

NamedLocation

public NamedLocation(NamedLocation loc)

NamedLocation

public NamedLocation(Symbol name,
                     java.lang.Object property)

Method Detail

entered

public boolean entered()

Description copied from class: Location

True if directly entered in an Environment. (Only if NamedLocation.)

Overrides:

entered in class Location<T>

getEnvironment

public Environment getEnvironment()

Overrides:

getEnvironment in class IndirectableLocation<T>

getKeySymbol

public final Symbol getKeySymbol()

Specified by:

getKeySymbol in interface EnvironmentKey

Overrides:

getKeySymbol in class IndirectableLocation<T>

getKeyProperty

public final java.lang.Object getKeyProperty()

Specified by:

getKeyProperty in interface EnvironmentKey

Overrides:

getKeyProperty in class IndirectableLocation<T>

matches

public final boolean matches(EnvironmentKey key)

Specified by:

matches in interface EnvironmentKey

matches

public final boolean matches(Symbol symbol,
                             java.lang.Object property)

Specified by:

matches in interface EnvironmentKey

getKey

public final EnvironmentKey getKey()

Specified by:

getKey in interface java.util.Map.Entry<EnvironmentKey,T>

equals

public boolean equals(java.lang.Object x)

Specified by:

equals in interface java.util.Map.Entry<EnvironmentKey,T>

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Specified by:

hashCode in interface java.util.Map.Entry<EnvironmentKey,T>

Overrides:

hashCode in class java.lang.Object

setWithSave

public java.lang.Object setWithSave(T newValue)

Description copied from class: Location

Set a value, but return cookie so old value can be restored. This is intended for fluid-let where (in the case of multiple threads) a simple save-restore isn't always the right thing.

Overrides:

setWithSave in class Location<T>

setRestore

public void setRestore(java.lang.Object oldValue)

Description copied from class: Location

Restore an old value.

Overrides:

setRestore in class Location<T>

Parameters:

oldValue - the return value from a prior setWithSave.