/**
* Copyright 2010 Google Inc.
*
* 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 org.waveprotocol.wave.client.render;
/**
* A renderer helper that also provides result.
*
*/
public interface ResultProducingRenderHelper<R> extends RendererHelper {
/** Starts rendering */
void begin();
/** Ends rendering */
void end();
/**
* Obtain the result from renderer helper. This method is idempotent and can
* be called repeatedly.
*/
R getResult();
}