Class StringTemplate.Aggregate

  extended by org.antlr.stringtemplate.StringTemplate.Aggregate
Enclosing class:

public static final class StringTemplate.Aggregate
extends java.lang.Object

An automatically created aggregate of properties. I often have lists of things that need to be formatted, but the list items are actually pieces of data that are not already in an object. I need ST to do something like: Ter=3432 Tom=32234 .... using template: $items:{$=$it.type$}$ This example will call getName() on the objects in items attribute, but what if they aren't objects? I have perhaps two parallel arrays instead of a single array of objects containing two fields. One solution is allow Maps to be handled like properties so that would fail getName() but then see that it's a Map and do it.get("name") instead. This very clean approach is espoused by some, but the problem is that it's a hole in my separation rules. People can put the logic in the view because you could say: "go get bob's data" in the view: Bob's Phone: $$ A view should not be part of the program and hence should never be able to go ask for a specific person's data. After much thought, I finally decided on a simple solution. I've added setAttribute variants that pass in multiple property values, with the property names specified as part of the name using a special attribute name syntax: "name.{propName1,propName2,...}". This object is a special kind of HashMap that hopefully prevents people from passing a subclass or other variant that they have created as it would be a loophole. Anyway, the ASTExpr.getObjectProperty() method looks for Aggregate as a special case and does a get() instead of getPropertyName.

Field Summary
protected  java.util.HashMap properties
Constructor Summary
Method Summary
 java.lang.Object get(java.lang.String propName)
protected  void put(java.lang.String propName, java.lang.Object propValue)
          Allow StringTemplate to add values, but prevent the end user from doing so.
 java.lang.String toString()
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail


protected java.util.HashMap properties
Constructor Detail


public StringTemplate.Aggregate()
Method Detail


protected void put(java.lang.String propName,
                   java.lang.Object propValue)
Allow StringTemplate to add values, but prevent the end user from doing so.


public java.lang.Object get(java.lang.String propName)


public java.lang.String toString()
toString in class java.lang.Object