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/*
* Copyright 2011 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.server.widgetsetutils;
import java.util.Collection;
import java.util.HashSet;
import com.vaadin.client.ComponentConnector;
import com.vaadin.client.ServerConnector;
import com.vaadin.shared.ui.Connect;
import com.vaadin.shared.ui.Connect.LoadStyle;
/**
* An abstract helper class that can be used to easily build a widgetset with
* customized load styles for each components. In three abstract methods one can
* override the default values given in {@link Connect} annotations.
*
* @see WidgetMapGenerator
*
*/
public abstract class CustomWidgetMapGenerator extends WidgetMapGenerator {
private Collection<Class<? extends ComponentConnector>> eagerPaintables = new HashSet<Class<? extends ComponentConnector>>();
private Collection<Class<? extends ComponentConnector>> lazyPaintables = new HashSet<Class<? extends ComponentConnector>>();
private Collection<Class<? extends ComponentConnector>> deferredPaintables = new HashSet<Class<? extends ComponentConnector>>();
@Override
protected LoadStyle getLoadStyle(Class<? extends ServerConnector> connector) {
if (eagerPaintables == null) {
init();
}
if (eagerPaintables.contains(connector)) {
return LoadStyle.EAGER;
}
if (lazyPaintables.contains(connector)) {
return LoadStyle.LAZY;
}
if (deferredPaintables.contains(connector)) {
return LoadStyle.DEFERRED;
}
return super.getLoadStyle(connector);
}
private void init() {
Class<? extends ComponentConnector>[] eagerComponents = getEagerComponents();
if (eagerComponents != null) {
for (Class<? extends ComponentConnector> class1 : eagerComponents) {
eagerPaintables.add(class1);
}
}
Class<? extends ComponentConnector>[] lazyComponents = getEagerComponents();
if (lazyComponents != null) {
for (Class<? extends ComponentConnector> class1 : lazyComponents) {
lazyPaintables.add(class1);
}
}
Class<? extends ComponentConnector>[] deferredComponents = getEagerComponents();
if (deferredComponents != null) {
for (Class<? extends ComponentConnector> class1 : deferredComponents) {
deferredPaintables.add(class1);
}
}
}
/**
* @return an array of components whose load style should be overridden to
* {@link LoadStyle#EAGER}
*/
protected abstract Class<? extends ComponentConnector>[] getEagerComponents();
/**
* @return an array of components whose load style should be overridden to
* {@link LoadStyle#LAZY}
*/
protected abstract Class<? extends ComponentConnector>[] getLazyComponents();
/**
* @return an array of components whose load style should be overridden to
* {@link LoadStyle#DEFERRED}
*/
protected abstract Class<? extends ComponentConnector>[] getDeferredComponents();
}
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