用于PHP的StdClass的Java模拟

Question

I need something like a property bag to throw key value pairs into. I want to create list of such objects, initialize them in bean and then use the list to render table in JSF template. I know how to do it, but I want to avoid creating some special class for that case, like OrderLineItem and using List<OrderLineItem>. I do not want to define new class.

In PHP I could use StdClass.
StdClass is a sparsely documented class in PHP which has no predefined members.

$object = new StdClass;
$object->foo = 'bar';

But, as far as I know, Primefaces <p:dataTable> list item must be an object with getter. If I want to reference <h:outputText value="#{item.title}" />, my list object should have getTitle() method.

Is there any walkaround in my case or I really need to define special class to make life easier?
Thanks.

Answer 1

When you want a simple key/value table, then the HashMap might be what you are looking for.

Map<String, String> myMap = new HashMap<>();

myMap.put("foo", "bar");

System.out.println(myMap.get("foo")); // outputs "bar"

This example matches Strings to Strings, but you can use HashMaps to map any type to any other type. You can even create a Map<Object, Object> to create a weakly-typed map which maps anything to anything. But for most use-cases you would rather use a more specialized form.