001    /**
002     * Copyright (C) 2009-2011 the original author or authors.
003     * See the notice.md file distributed with this work for additional
004     * information regarding copyright ownership.
005     *
006     * Licensed under the Apache License, Version 2.0 (the "License");
007     * you may not use this file except in compliance with the License.
008     * You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package org.fusesource.restygwt.example.client.event;
020    
021    import com.google.gwt.event.shared.GwtEvent;
022    
023    /**
024     * generic ModelChangeEvent with identifier for the matching domain class. unfortinately
025     * its not possible to have different eventclasses for different domain-updates due to
026     * the lack of reflection. could do this with a generator class, maybe later..
027     *
028     * taken from http://stackoverflow.com/questions/2951621/gwt-custom-events/2967359#2967359
029     *
030     * @author <a href="mailto:andi.balke@gmail.com">andi</<a>
031     *
032     */
033    public class ModelChangeEvent extends GwtEvent<ModelChangedEventHandler> {
034    
035        public static Type<ModelChangedEventHandler> TYPE = new Type<ModelChangedEventHandler>();
036    
037        /**
038         * for which domain class things have changed
039         */
040        private String domainIdentifier;
041    
042        public ModelChangeEvent(final String domainIdentifier) {
043            this.domainIdentifier = domainIdentifier;
044        }
045    
046        public String getDomain() {
047            return domainIdentifier;
048        }
049    
050        @Override
051        public com.google.gwt.event.shared.GwtEvent.Type<ModelChangedEventHandler> getAssociatedType() {
052            return TYPE;
053        }
054    
055        @Override
056        protected void dispatch(ModelChangedEventHandler handler) {
057            handler.onModelChange(this);
058        }
059    
060        public String toString() {
061            return "ModelChangeEvent#" + domainIdentifier;
062        }
063    }