Date: 2004-09-24T12:37:43 Editor: MichaelMcGrady <[EMAIL PROTECTED]> Wiki: Apache Struts Wiki Page: StrutsCatalogInstrumentableForms URL: http://wiki.apache.org/struts/StrutsCatalogInstrumentableForms
no comment Change Log: ------------------------------------------------------------------------------ @@ -1,55 +1 @@ -StrutsCatalog: '''Provide a multipurpose form that can be instrumented.''' - -'''IN ORDER TO USE THIS YOU HAVE TO USE CLASSES THAT ARE NOT READILY AVAILABLE. IF YOU ARE INTERESTED, PLEASE CONTACT ME AT [EMAIL PROTECTED]''' - -This !BeanMapForm class allows you to instrument your !ActionForms and use them as dynamic property setters and getters as well. (The size 89 is chosen because the series created by x = 2x + 1 stays prime for a considerable time, e.g. 89, 179, 359, ''etc''. This maximizes the benefits of the lookup algorithms.) You don't have to use this class as a form, of course. You can use it just for the dynamic property setters and getters and instrument that, if you like, or not. But, there are lots of reasons to instrument action forms and this allows you to do that. - -You instrument such forms, of course, by subclassing !BeanMapForm. Check Joshua Bloch's ''Effective Java'', Item 14 (favor composition over inheritance), p. 71 ''et seq'', to understand the intricacies involved with instrumentation and collection classes. - -Also, cf. ["StrutsCatalogVariableScreenFields"] and http://jakarta.apache.org/struts/faqs/indexedprops.html - -{{{ -public class BeanMapForm - extends ActionForm - implements Map { - private Map map; - - public BeanMapForm() { - int size = 89; - this.map = Collections.synchronizedMap(new HashMap(size)); - } - - public void setMap(Map map) { - this.map = map; - } - - public Map getMap() { - return map; - } - - public void setProperty(Object key, Object value) { - map.put(key,value); - } - - public Object getProperty(Object key) { - return map.get(key); - } - - public void clear() { map.clear(); } - public boolean containsKey(Object key) { return map.containsKey(key);} - public boolean containsValue(Object value) { return map.containsValue(value); } - public Set entrySet() { return map.entrySet(); } - public boolean equals(Object object) { return map.equals(object); } - public Object get(Object key) { return map.get(key); } - public int hashCode() { return map.hashCode(); } - public boolean isEmpty() { return map.isEmpty(); } - public Set keySet() { return map.keySet(); } - public Object put(Object key, Object value) { return map.put(key,value); } - public void putAll(Map map) { map.putAll(map); } - public Object remove(Object key) { return map.remove(key); } - public int size() { return map.size(); } - public Collection values() { return map.values(); } - public String toString() { return "BeanMapForm[" + map.toString() + "]"; } -} ///;-) -}}} --- Michael !McGrady +Please see the following for the code [http://www.michaelmcgrady.com/] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
