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/*
* Copyright 2000-2016 Vaadin Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.vaadin.navigator;
import java.io.Serializable;
/**
* An interface for handling interaction between {@link Navigator} and the
* browser location URI or other similar view identification and bookmarking
* system. The state is limited to a single string because in the usual cases it
* forms a part of a URI.
* <p>
* Different implementations can be created for hashbang URIs, HTML5 pushState,
* portlet URL navigation and other similar systems.
* <p>
* This interface is mostly for internal use by Navigator.
*
* @author Vaadin Ltd
* @since 7.0
*/
public interface NavigationStateManager extends Serializable {
/**
* Returns the current navigation state including view name and any optional
* parameters.
*
* @return current view and parameter string, not null
*/
public String getState();
/**
* Sets the current navigation state in the location URI or similar
* location, including view name and any optional parameters.
* <p>
* This method should be only called by a Navigator.
*
* @param fragment
* new view and parameter string, not null
*/
public void setState(String state);
/**
* Sets the Navigator used with this state manager. The state manager should
* notify the provided navigator of user-triggered navigation state changes
* by invoking <code>navigator.navigateTo(getState())</code>.
* {@code navigator} parameter value could be null if previously set
* navigator is destroyed.
* <p>
* This method should only be called by a Navigator.
*/
public void setNavigator(Navigator navigator);
}
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