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/**
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* Copyright (C) 2017 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.vaadin.event;
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import com.vaadin.data.Property.ValueChangeEvent;
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import com.vaadin.data.Property.ValueChangeListener;
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import com.vaadin.ui.Field;
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import eu.etaxonomy.cdm.cache.EntityCache;
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import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
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import eu.etaxonomy.cdm.model.common.CdmBase;
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import eu.etaxonomy.cdm.vaadin.view.name.CachingPresenter;
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/**
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*
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* @author a.kohlbecker
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* @since 19.10.2017
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*
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*/
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public class ToOneRelatedEntityReloader<CDM extends CdmBase> implements ValueChangeListener {
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private static final long serialVersionUID = -1141764783149024788L;
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Field<CDM> toOneRelatedEntityField;
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CachingPresenter cachingPresenter;
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public ToOneRelatedEntityReloader( Field<CDM> toOneRelatedEntityField, CachingPresenter entityCache){
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this.toOneRelatedEntityField = toOneRelatedEntityField;
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this.cachingPresenter = entityCache;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void valueChange(ValueChangeEvent event) {
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CDM value = (CDM)event.getProperty().getValue();
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if(value == null) {
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return;
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}
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value = HibernateProxyHelper.deproxy(value);
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EntityCache cache = cachingPresenter.getCache();
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if(cache != null){
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cache.update();
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CDM cachedEntity = cache.find(value);
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if(cachedEntity == null){
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cache.add(value);
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} else if(
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// pure object comparison is not reliable since the entity may have been changed
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cachedEntity.getId() == value.getId() && cachedEntity.getClass() == value.getClass()){
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toOneRelatedEntityField.removeValueChangeListener(this);
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toOneRelatedEntityField.setValue(null); // reset to trick equals check in vaadin
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toOneRelatedEntityField.setValue(cachedEntity);
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toOneRelatedEntityField.addValueChangeListener(this);
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}
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}
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}
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}
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