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## com.google.gwt.place.shared
Class PlaceHistoryHandler

    java.lang.Object
      com.google.gwt.place.shared.PlaceHistoryHandler

    public class PlaceHistoryHandler

extends java.lang.Object

Monitors `PlaceChangeEvent`s and `History` events and keep them in sync.

Nested Class Summary
`static class` | `PlaceHistoryHandler.DefaultHistorian` Default implementation of `PlaceHistoryHandler.DefaultHistorian`, based on `History`.
`static interface` | `PlaceHistoryHandler.Historian` Optional delegate in charge of History related events.

Constructor Summary
`PlaceHistoryHandler(PlaceHistoryMapper mapper)` Create a new PlaceHistoryHandler with a `PlaceHistoryHandler.DefaultHistorian`.
`PlaceHistoryHandler(PlaceHistoryMapper mapper, PlaceHistoryHandler.Historian historian)` Create a new PlaceHistoryHandler.

Method Summary
`void` | `handleCurrentHistory()` Handle the current history token.
`(package private) java.util.logging.Logger` | `log()` Visible for testing.
`HandlerRegistration` | `register(PlaceController placeController, EventBus eventBus, Place defaultPlace)` Deprecated. use `register(PlaceController, EventBus, Place)`
`HandlerRegistration` | `register(PlaceController placeController, EventBus eventBus, Place defaultPlace)` Initialize this place history handler.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### PlaceHistoryHandler

    public PlaceHistoryHandler(PlaceHistoryMapper mapper)

  Create a new PlaceHistoryHandler with a `PlaceHistoryHandler.DefaultHistorian`. The DefaultHistorian is created via a call to GWT.create(), so an alternative default implementation can be provided through <replace-with> rules in a `gwt.xml` file.

  Parameters:
    `mapper` - a `PlaceHistoryMapper` instance

### PlaceHistoryHandler

    public PlaceHistoryHandler(PlaceHistoryMapper mapper,
                               PlaceHistoryHandler.Historian historian)

  Create a new PlaceHistoryHandler.

  Parameters:
    `mapper` - a `PlaceHistoryMapper` instance
    `historian` - a `PlaceHistoryHandler.DefaultHistorian` instance

Method Detail

### handleCurrentHistory

    public void handleCurrentHistory()

  Handle the current history token. Typically called at application start, to ensure bookmark launches work.

### register

    @Deprecated
    public HandlerRegistration register(PlaceController placeController,
                                                   EventBus eventBus,
                                                   Place defaultPlace)

  Deprecated. use `register(PlaceController, EventBus, Place)`

  Legacy method tied to the old location for `EventBus`.

### register

    public HandlerRegistration register(PlaceController placeController,
                                        EventBus eventBus,
                                        Place defaultPlace)

  Initialize this place history handler.

  Returns:
    a registration object to de-register the handler

### log

    java.util.logging.Logger log()

  Visible for testing.

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