PlaceHistoryHandler.Historian (GWT Javadoc)

All Known Implementing Classes:

PlaceHistoryHandler.DefaultHistorian

Enclosing class:

PlaceHistoryHandler
```
public static interface PlaceHistoryHandler.Historian
```
Optional delegate in charge of History related events. Provides nice isolation for unit testing, and allows pre- or post-processing of tokens. Methods correspond to the like named methods on History.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`HandlerRegistration`	`addValueChangeHandler(ValueChangeHandler<java.lang.String> valueChangeHandler)`	Adds a `ValueChangeEvent` handler to be informed of changes to the browser's history stack.
`java.lang.String`	`getToken()`
`void`	`newItem(java.lang.String token, boolean issueEvent)`	Adds a new browser history entry.

- Method Detail
  - addValueChangeHandler
```
HandlerRegistration addValueChangeHandler(ValueChangeHandler<java.lang.String> valueChangeHandler)
```
    Adds a ValueChangeEvent handler to be informed of changes to the browser's history stack.
    
    Parameters:
    
    valueChangeHandler - the handler
    
    Returns:
    
    the registration used to remove this value change handler
  - getToken
```
java.lang.String getToken()
```
    Returns:
    
    the current history token.
  - newItem
```
void newItem(java.lang.String token,
             boolean issueEvent)
```
    Adds a new browser history entry. Calling this method will cause ValueChangeHandler.onValueChange(com.google.gwt.event.logical.shared.ValueChangeEvent) to be called as well.