IPropertyCollector (Metaschema Java Data/Object Binding and Code Generation 1.0.0-M1 API)

```
public interface IPropertyCollector
```
The class is used to "collect" items together to assign to the property's field. For fields with a collection type, implementations of this class will handle managing the underlying collection.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`add(Object item)`	Add an item to the "collection", who's type depends on the property configuration.
`void`	`addAll(Collection<?> items)`	Add a collection of item to the "collection", who's type depends on the property configuration.
`Object`	`getValue()`	Get the current state of the "collection".

- Method Detail
  - add
```
void add(@NonNull
         Object item)
```
    Add an item to the "collection", who's type depends on the property configuration.
    
    Parameters:
    
    item - the item to add
    
    Throws:
    
    IllegalStateException - if the item cannot be added due to a model inconsistency
  - addAll
```
void addAll(@NonNull
            Collection<?> items)
```
    Add a collection of item to the "collection", who's type depends on the property configuration.
    
    Parameters:
    
    items - the items to add
    
    Throws:
    
    IllegalStateException - if the item cannot be added due to a model inconsistency
  - getValue
```
Object getValue()
```
    Get the current state of the "collection". For single valued "non-collections" this may return a null value. For any collection type, such as List or Map, this must return a non-null empty collection.
    
    Returns:
    
    the "collection" value or null for a single valued instance that is not defined