get
public final Object get(Object defaultValue)
- get in interface Location
getProperty
public static Object getProperty(Object symbol,
Object property,
Object defaultValue)
Gets a property value associated with an object.
Corresponds to Common Lisp's get
function.
getProperty
public static Object getProperty(Object symbol,
Object property,
Object defaultValue,
Environment env)
Gets a property value associated with an object.
symbol
- Usually a Symbol
, but can be any
Object>/code>. A
String
is converted to a
Symbol
using env.getSymbol()
.
Symbols require a constant-type hash lookup; other object
are serached linearly.
getPropertyList
public static Object getPropertyList(Object symbol)
Get the property list associated with object in the current Environment.
Corresponds to Common Lisp's symbol-plist
function.
symbol
- Usually but not necessarily a Symbol.
(A String is not converted a Symbol by this method.)
getPropertyList
public static Object getPropertyList(Object symbol,
Environment env)
Get the property list assocated with an object in a given Environment.
symbol
- Usually but not necessarily a Symbol.
(A String is not converted a Symbol by this method.)
plistGet
public static Object plistGet(Object plist,
Object prop,
Object dfault)
Given a property list and a key, find the corresponding property value.
plistPut
public static Object plistPut(Object plist,
Object prop,
Object value)
Modify and add a property binding to a property list.
- The updated property list.
plistRemove
public static Object plistRemove(Object plist,
Object prop)
Remove a property binding from a property list.
- The updated property list.
putProperty
public static void putProperty(Object symbol,
Object property,
Object newValue)
Sets a property value associated with an object.
Corresponds to Common Lisp's (setf get)
function.
putProperty
public static void putProperty(Object symbol,
Object property,
Object newValue,
Environment env)
removeProperty
public static boolean removeProperty(Object symbol,
Object property)
Remove a properaty assocatied with an object.
Corresponds to Common Lisp's remprop
function.
removeProperty
public static boolean removeProperty(Object symbol,
Object property,
Environment env)
Remove a properaty assocatied with an object.
set
public final void set(Object newValue)
- set in interface Location
setPropertyList
public static void setPropertyList(Object symbol,
Object plist)
Set the property list assocated with an object in a given Environment.
Corresponds to Common Lisp's (setf symbol-plist)
function.
setPropertyList
public static void setPropertyList(Object symbol,
Object plist,
Environment env)
Set the property list assocated with an object in a given Environment.
This function should be avoided, since a Symbol's property list may
be used by unknown classes. It also can be slow.
symbol
- Usually but not necessarily a Symbol.
(A String is not converted a Symbol by this method.)