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/**
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* Copyright (C) 2018 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.vaadin.component;
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/**
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* Interface to ship around equality problems of entities which have modified data.
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*
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* TODO as inner type of ToOneRelatedEntityReloader?
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*
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* @author a.kohlbecker
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* @since Feb 8, 2018
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*
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* @param <V>
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*/
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public interface EntitySupport<V> {
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/**
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* This method allows updating the value even if the equals check done
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* in {@link com.vaadin.ui.AbstractField#setValue(Object)} would return true.
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* This is important when working with entity beans which have been modified.
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* For entity beans equality given when the type and id are equal, so data
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* modification is not respected by this concept of equality. Such entities
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* would be skipped in the {@link com.vaadin.ui.AbstractField#setValue(Object) setValue()}
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* method and {@link ValueChangeListener ValueChangeListeners} like the
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* {@link eu.etaxonomy.cdm.vaadin.event.ToOneRelatedEntityReloader ToOneRelatedEntityReloader}
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* would not be triggered.
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* <p>
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* To circumvent this problem this method checks for object identity with the internal value of
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* the select field and resets the internal select fields to cause the equality check to fail during
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* the subsequent execution of the setValue() method. By this it is guaranteed the the value will be
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* updated and that
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* the {@link eu.etaxonomy.cdm.vaadin.event.ToOneRelatedEntityReloader ToOneRelatedEntityReloaders}
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* will be triggered.
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*
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* @param bean
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*/
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void replaceEntityValue(V bean);
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}
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