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package com.sun.faces.application;
import com.sun.faces.application.view.JspStateManagementStrategy;
import java.io.IOException;
import java.util.Map;
import javax.faces.application.StateManager;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;
import javax.faces.render.RenderKit;
import javax.faces.render.ResponseStateManager;
import javax.faces.view.StateManagementStrategy;
import javax.faces.view.ViewDeclarationLanguage;
/**
* <p> A
* <code>StateManager</code> implementation to meet the requirements of the
* specification. </p>
*/
public class StateManagerImpl extends StateManager {
/**
* Save the view.
*
* @param context the Faces context.
* @return the saved view.
*/
@Override
public Object saveView(FacesContext context) {
Object result = null;
if (context != null && !context.getViewRoot().isTransient()) {
UIViewRoot viewRoot = context.getViewRoot();
StateManagementStrategy strategy = null;
String viewId = viewRoot.getViewId();
ViewDeclarationLanguage vdl =
context.getApplication().getViewHandler().
getViewDeclarationLanguage(context, viewId);
if (vdl != null) {
strategy = vdl.getStateManagementStrategy(context, viewId);
}
Map<Object, Object> contextAttributes = context.getAttributes();
try {
contextAttributes.put(StateManager.IS_SAVING_STATE, Boolean.TRUE);
if (strategy != null) {
result = strategy.saveView(context);
} else {
strategy = new JspStateManagementStrategy(context);
result = strategy.saveView(context);
}
} finally {
contextAttributes.remove(StateManager.IS_SAVING_STATE);
}
}
return result;
}
/**
* Write out the state.
*
* @param context the Faces context.
* @param state the state.
* @throws IOException when an I/O error occurs.
*/
@Override
public void writeState(FacesContext context, Object state) throws IOException {
RenderKit rk = context.getRenderKit();
ResponseStateManager rsm = rk.getResponseStateManager();
rsm.writeState(context, state);
}
/**
* Restores the view.
*
* @param context the Faces context.
* @param viewId the view id.
* @param renderKitId the render kit id.
* @return the view root.
* @see {@link StateManager#restoreView(javax.faces.context.FacesContext, String, String)}
*/
public UIViewRoot restoreView(FacesContext context, String viewId, String renderKitId) {
UIViewRoot result;
StateManagementStrategy strategy = null;
ViewDeclarationLanguage vdl =
context.getApplication().getViewHandler().
getViewDeclarationLanguage(context, viewId);
if (vdl != null) {
strategy = vdl.getStateManagementStrategy(context, viewId);
}
if (strategy != null) {
result = strategy.restoreView(context, viewId, renderKitId);
} else {
strategy = new JspStateManagementStrategy(context);
result = strategy.restoreView(context, viewId, renderKitId);
}
return result;
}
}