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/*
* Copyright 2000-2014 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.client.annotations;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import com.vaadin.client.communication.StateChangeEvent;
/**
* Marks a method in Connector classes that should be used to handle changes to
* specific properties in the connector's shared state.
* <p>
* The annotated method will be called whenever at least one of the named state
* properties have changed. If multiple listened properties are changed by the
* same {@link StateChangeEvent}, the method will only be called once.
* <p>
* If there is no state variable with the provided name, the widgetset
* compilation will fail.
*
* @since 7.2
* @author Vaadin Ltd
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
@Documented
public @interface OnStateChange {
/**
* Defines a list of property names to listen for.
*
* @return an array of property names, should contain at least one item
*/
public String[] value();
}
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