| java.lang.Object
 gnu.mapping.Location
gnu.mapping.PropertyLocation
| PropertyLocation | | public class PropertyLocation extends Location (Code) | | Used to implement Lisp-style "property lists".
A PropertyLocation is a location whose value is the
car of a property list.
This class also contains a number of static methods useful for
working with property lists.
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| Method Summary | |
| final public Object | get(Object defaultValue)
| | public static Object | getProperty(Object symbol, Object property, Object defaultValue, Environment env)
Gets a property value associated with an object.
Parameters:
symbol - Usually a Symbol, but can be anyObject>/code>. | | public static Object | getProperty(Object symbol, Object property, Object defaultValue)
Gets a property value associated with an object. | | public static Object | getPropertyList(Object symbol, Environment env)
Get the property list assocated with an object in a given Environment. | | public static Object | getPropertyList(Object symbol)
Get the property list associated with object in the current Environment. | | public boolean | isBound()
| | public static Object | plistGet(Object plist, Object prop, Object dfault)
Given a property list and a key, find the corresponding property value. | | public static Object | plistPut(Object plist, Object prop, Object value)
Modify and add a property binding to a property list. | | public static Object | plistRemove(Object plist, Object prop)
Remove a property binding from a property list. | | public static void | putProperty(Object symbol, Object property, Object newValue, Environment env)
| | public static void | putProperty(Object symbol, Object property, Object newValue)
Sets a property value associated with an object. | | public static boolean | removeProperty(Object symbol, Object property, Environment env)
Remove a properaty assocatied with an object. | | public static boolean | removeProperty(Object symbol, Object property)
Remove a properaty assocatied with an object. | | final public void | set(Object newValue)
| | 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. | | public static void | setPropertyList(Object symbol, Object plist)
Set the property list assocated with an object in a given Environment. |
| getProperty | | public static Object getProperty(Object symbol, Object property, Object defaultValue, Environment env)(Code) | | Gets a property value associated with an object.
Parameters:
symbol - Usually a Symbol, but can be anyObject>/code>. A String is converted to aSymbol using env.getSymbol().Symbols require a constant-type hash lookup; other objectare serached linearly. |
| getProperty | | public static Object getProperty(Object symbol, Object property, Object defaultValue)(Code) | | Gets a property value associated with an object.
Corresponds to Common Lisp's get function.
See Also: #getProperty(Object, Object, Object, Environment). |
| getPropertyList | | public static Object getPropertyList(Object symbol, Environment env)(Code) | | Get the property list assocated with an object in a given Environment.
Parameters:
symbol - Usually but not necessarily a Symbol.(A String is not converted a Symbol by this method.) |
| getPropertyList | | public static Object getPropertyList(Object symbol)(Code) | | Get the property list associated with object in the current Environment.
Corresponds to Common Lisp's symbol-plist function.
Parameters:
symbol - Usually but not necessarily a Symbol.(A String is not converted a Symbol by this method.) |
| isBound | | public boolean isBound()(Code) | | |
| plistGet | | public static Object plistGet(Object plist, Object prop, Object dfault)(Code) | | Given a property list and a key, find the corresponding property value.
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| plistPut | | public static Object plistPut(Object plist, Object prop, Object value)(Code) | | Modify and add a property binding to a property list.
The updated property list. |
| plistRemove | | public static Object plistRemove(Object plist, Object prop)(Code) | | Remove a property binding from a property list.
The updated property list. |
| putProperty | | public static void putProperty(Object symbol, Object property, Object newValue)(Code) | | Sets a property value associated with an object.
Corresponds to Common Lisp's (setf get) function.
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| removeProperty | | public static boolean removeProperty(Object symbol, Object property, Environment env)(Code) | | Remove a properaty assocatied with an object.
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| removeProperty | | public static boolean removeProperty(Object symbol, Object property)(Code) | | Remove a properaty assocatied with an object.
Corresponds to Common Lisp's remprop function.
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| setPropertyList | | public static void setPropertyList(Object symbol, Object plist, Environment env)(Code) | | 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.
Parameters:
symbol - Usually but not necessarily a Symbol.(A String is not converted a Symbol by this method.) |
| setPropertyList | | public static void setPropertyList(Object symbol, Object plist)(Code) | | Set the property list assocated with an object in a given Environment.
Corresponds to Common Lisp's (setf symbol-plist) function.
See Also: #setPropertyList(Object, Object, Environment). |
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