EDIT

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.model.taxon;

import java.util.HashSet;

import java.util.Set;

import javax.persistence.Entity;

import javax.persistence.FetchType;

import javax.persistence.OneToMany;

import javax.persistence.Transient;

import javax.validation.Valid;

import javax.validation.constraints.NotNull;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlElementWrapper;

import javax.xml.bind.annotation.XmlIDREF;

import javax.xml.bind.annotation.XmlRootElement;

import javax.xml.bind.annotation.XmlSchemaType;

import javax.xml.bind.annotation.XmlType;

import org.apache.log4j.Logger;

import org.hibernate.annotations.Cascade;

import org.hibernate.annotations.CascadeType;

import org.hibernate.envers.Audited;

import org.hibernate.search.annotations.Indexed;

import org.hibernate.validator.constraints.NotEmpty;

import org.springframework.beans.factory.annotation.Configurable;

import eu.etaxonomy.cdm.model.common.IRelated;

import eu.etaxonomy.cdm.model.name.TaxonNameBase;

import eu.etaxonomy.cdm.model.reference.Reference;

import eu.etaxonomy.cdm.strategy.cache.taxon.ITaxonCacheStrategy;

import eu.etaxonomy.cdm.strategy.cache.taxon.TaxonBaseDefaultCacheStrategy;

import eu.etaxonomy.cdm.validation.Level2;

/**

 * The class for synonyms: these are {@link TaxonBase taxa} the {@link name.TaxonNameBase taxon names}

 * of which are not used by the {@link TaxonBase#getSec() reference} to designate a real

 * taxon but are mentioned as taxon names that were oder are used by some other

 * unspecified references to designate (at least to some extent) the same

 * particular real taxon. Synonyms that are involved in no

 * {@link SynonymRelationship synonym relationship} are actually meaningless.<BR>

 * Splitting taxa in "accepted/correct" and "synonyms"

 * makes it easier to handle particular relationships between

 * ("accepted/correct") {@link Taxon taxa} on the one hand and between ("synonym") taxa

 * and ("accepted/correct") taxa on the other.

 *

 * @author m.doering

 * @version 1.0

 * @created 08-Nov-2007 13:06:55

 */

@XmlAccessorType(XmlAccessType.FIELD)

@XmlType(name = "Synonym", propOrder = {

    "synonymRelations"

})

@XmlRootElement(name = "Synonym")

@Entity

@Indexed(index = "eu.etaxonomy.cdm.model.taxon.TaxonBase")

@Audited

@Configurable

public class Synonym extends TaxonBase<ITaxonCacheStrategy<Synonym>> implements IRelated<SynonymRelationship>{

	private static final long serialVersionUID = -454067515022159757L;

	@SuppressWarnings("unused")

	private static final Logger logger = Logger.getLogger(Synonym.class);

	// Don't need the synonym relations here since they are stored at taxon side?

	@XmlElementWrapper(name = "SynonymRelations")

	@XmlElement(name = "SynonymRelationship")

    @XmlIDREF

    @XmlSchemaType(name = "IDREF")

    @OneToMany(mappedBy="relatedFrom", fetch=FetchType.LAZY, orphanRemoval=true)

	@Cascade({CascadeType.SAVE_UPDATE, CascadeType.MERGE})

	@NotNull

	@NotEmpty(groups = Level2.class,message="{eu.etaxonomy.cdm.model.taxon.Synonym.noOrphanedSynonyms.message}")

	@Valid

	private Set<SynonymRelationship> synonymRelations = new HashSet<SynonymRelationship>();

	// ************* CONSTRUCTORS *************/

	/**

	 * Class constructor: creates a new empty synonym instance.

	 *

	 * @see 	#Synonym(TaxonNameBase, Reference)

	 */

	//TODO should be private, but still produces Spring init errors

	public Synonym(){

		this.cacheStrategy = new TaxonBaseDefaultCacheStrategy<Synonym>();

	}

	/**

	 * Class constructor: creates a new synonym instance with

	 * the {@link eu.etaxonomy.cdm.model.name.TaxonNameBase taxon name} used and the {@link eu.etaxonomy.cdm.model.reference.Reference reference}

	 * using it as a synonym and not as an ("accepted/correct") {@link Taxon taxon}.

	 *

	 * @param  taxonNameBase	the taxon name used

	 * @param  sec				the reference using the taxon name

	 * @see    					Synonym#Synonym(TaxonNameBase, Reference)

	 */

	public Synonym(TaxonNameBase taxonNameBase, Reference sec){

		super(taxonNameBase, sec);

		this.cacheStrategy = new TaxonBaseDefaultCacheStrategy<Synonym>();

	}

	//********* METHODS **************************************/

	/**

	 * Creates a new synonym instance with

	 * the {@link eu.etaxonomy.cdm.model.name.TaxonNameBase taxon name} used and the {@link eu.etaxonomy.cdm.model.reference.Reference reference}

	 * using it as a synonym and not as an ("accepted/correct") {@link Taxon taxon}.

	 *

	 * @param  taxonNameBase	the taxon name used

	 * @param  sec				the reference using the taxon name

	 * @see    					#Synonym(TaxonNameBase, Reference)

	 */

	public static Synonym NewInstance(TaxonNameBase taxonName, Reference sec){

		Synonym result = new Synonym(taxonName, sec);

		return result;

	}

	/**

	 * Returns the set of all {@link SynonymRelationship synonym relationships}

	 * in which <i>this</i> synonym is involved. <i>This</i> synonym can only

	 * be the source within these synonym relationships.

	 *

	 * @see    #addSynonymRelation(SynonymRelationship)

	 * @see    #addRelationship(SynonymRelationship)

	 * @see    #removeSynonymRelation(SynonymRelationship)

	 */

	public Set<SynonymRelationship> getSynonymRelations() {

		if(synonymRelations == null) {

			this.synonymRelations = new HashSet<SynonymRelationship>();

		}

		return synonymRelations;

	}

	/**

	 * @see    #getSynonymRelations()

	 */

	protected void setSynonymRelations(Set<SynonymRelationship> synonymRelations) {

		this.synonymRelations = synonymRelations;

	}

	/**

	 * Adds an existing {@link SynonymRelationship synonym relationship} to the set of

	 * {@link #getSynonymRelations() synonym relationships} assigned to <i>this</i> synonym. If

	 * the source of the synonym relationship does not match with <i>this</i>

	 * synonym no addition will be carried out.<BR>

	 * This methods does the same as the {@link #addRelationship() addRelationship} method.

	 *

	 * @param synonymRelation	the synonym relationship to be added to <i>this</i> synonym's

	 * 							synonym relationships set

	 * @see    	   				#addRelationship(SynonymRelationship)

	 * @see    	   				#getSynonymRelations()

	 * @see    	   				#removeSynonymRelation(SynonymRelationship)

	 */

	protected void addSynonymRelation(SynonymRelationship synonymRelation) {

		this.synonymRelations.add(synonymRelation);

	}

	/**

	 * Removes one element from the set of {@link SynonymRelationship synonym relationships} assigned

	 * to <i>this</i> synonym. Due to bidirectionality the given

	 * synonym relationship will also be removed from the set of synonym

	 * relationships assigned to the {@link Taxon#getSynonymRelations() taxon} involved in the

	 * relationship. Furthermore the content of

	 * the {@link SynonymRelationship#getAcceptedTaxon() accepted taxon} attribute and of the

	 * {@link SynonymRelationship#getSynonym() synonym} attribute within the synonym relationship

	 * itself will be set to "null".

	 *

	 * @param  synonymRelation  the synonym relationship which should be deleted

	 * @see     		  		#getSynonymRelations()

	 * @see     		  		#addRelationship(SynonymRelationship)

	 */

	public void removeSynonymRelation(SynonymRelationship synonymRelation) {

		synonymRelation.setSynonym(null);

		Taxon taxon = synonymRelation.getAcceptedTaxon();

		if (taxon != null){

			synonymRelation.setAcceptedTaxon(null);

			taxon.removeSynonymRelation(synonymRelation);

		}

		this.synonymRelations.remove(synonymRelation);

	}

	/**

	 * Adds an existing {@link SynonymRelationship synonym relationship} to the set of

	 * {@link #getSynonymRelations() synonym relationships} assigned to <i>this</i> synonym. If

	 * the source of the synonym relationship does not match with <i>this</i>

	 * synonym no addition will be carried out.<BR>

	 * This methods does the same as the {@link #addSynonymRelation(SynonymRelationship) addSynonymRelation} method.

	 *

	 * @param synonymRelation	the synonym relationship to be added to <i>this</i> synonym's

	 * 							synonym relationships set

	 * @see    	   				#addSynonymRelation(SynonymRelationship)

	 * @see    	   				#getSynonymRelations()

	 * @see    	   				#removeSynonymRelation(SynonymRelationship)

	 */

	/* (non-Javadoc)

	 * @see eu.etaxonomy.cdm.model.common.IRelated#addRelationship(eu.etaxonomy.cdm.model.common.RelationshipBase)

	 */

	@Override

    public void addRelationship(SynonymRelationship rel){

		addSynonymRelation(rel);

	}

	/**

	 * Returns the set of all ("accepted/correct") {@link Taxon taxa} involved in the same

	 * {@link SynonymRelationship synonym relationships} as <i>this</i> synonym.

	 * Each taxon is the target and <i>this</i> synonym is the source of a {@link SynonymRelationship synonym relationship}

	 * belonging to the {@link #getSynonymRelations() set of synonym relationships} assigned to

	 * <i>this</i> synonym. For a particular synonym there are more than one

	 * ("accepted/correct") taxa only if the {@link SynonymRelationship#isProParte() "is pro parte" flag}

	 * of the corresponding {@link SynonymRelationship synonym relationships} is set.

	 *

	 * @see    #getSynonymRelations()

	 * @see    #getRelationType(Taxon)

	 * @see    SynonymRelationship#isProParte()

	 */

	@Transient

	public Set<Taxon> getAcceptedTaxa() {

		Set<Taxon>taxa=new HashSet<Taxon>();

		for (SynonymRelationship rel:getSynonymRelations()){

			taxa.add(rel.getAcceptedTaxon());

		}

		return taxa;

	}

	/**

	 * Returns true if <i>this</i> is a synonym of the given taxon.

	 *

	 * @param taxon	the taxon to check synonym for

	 * @return	true if <i>this</i> is a ynonms of the given taxon

	 *

	 * @see #getAcceptedTaxa()

	 */

	@Transient

	public boolean isSynonymOf(Taxon taxon){

		return getAcceptedTaxa().contains(taxon);

	}

	@Override

    @Transient

	public boolean isOrphaned() {

		return false;

	}

	/**

	 * Returns the set of {@link SynonymRelationshipType synonym relationship types} of the

	 * {@link SynonymRelationship synonym relationships} where the {@link SynonymRelationship#getSynonym() synonym}

	 * is <i>this</i> synonym and the {@link SynonymRelationship#getAcceptedTaxon() taxon}

	 * is the given one. "Null" is returned if the given taxon is "null" or if

	 * no synonym relationship exists from <i>this</i> synonym to the

	 * given taxon.

	 *

	 * @param taxon	the ("accepted/correct") taxon which a synonym relationship

	 * 				from <i>this</i> synonym should point to

	 * @see    		#getSynonymRelations()

	 * @see    		#getAcceptedTaxa()

	 */

	public Set<SynonymRelationshipType> getRelationType(Taxon taxon){

		Set<SynonymRelationshipType> result = new HashSet<SynonymRelationshipType>();

		if (taxon == null ){

			return result;

		}

		for (SynonymRelationship rel : getSynonymRelations()){

			Taxon acceptedTaxon = rel.getAcceptedTaxon();

			if (taxon.equals(acceptedTaxon)){

				result.add(rel.getType());

			}

		}

		return result;

	}

	/**

	 * Replaces ALL accepted taxa of this synonym by the new accepted taxon.

	 * The citation information (citation /microcitation) of the synonym relationship

	 * is kept.

	 * @param newAcceptedTaxon

	 * 			the new accepted taxon

	 * @param relType

	 * 			if not <code>null</code> the relationship type is changed to relType

	 * @param copyCitationInfo

	 * 			if true the citation and the microcitation of relationship

	 * 			is not changed.

	 * @param citation

	 * 			if copyCitationInfo is <code>false</code> this citation is set

	 * 			to the synonym relationship.

	 * @param microCitation

	 * 			if copyCitationInfo is <code>false</code> this micro citation is set

	 * 			to the synonym relationship.

	 * @param acceptedTaxon

	 */

	public void replaceAcceptedTaxon(Taxon newAcceptedTaxon, SynonymRelationshipType relType, boolean copyCitationInfo, Reference citation, String microCitation) {

		Set<SynonymRelationship> rels = new HashSet<SynonymRelationship>();

		rels.addAll(this.getSynonymRelations());  //avoid concurrent modification exception

		for (SynonymRelationship rel : rels){

			Taxon oldAcceptedTaxon = rel.getAcceptedTaxon();

			Synonym syn = rel.getSynonym();

			oldAcceptedTaxon.removeSynonym(rel.getSynonym(), false);

			SynonymRelationship newRel = (SynonymRelationship)rel.clone();

			newRel.setAcceptedTaxon(newAcceptedTaxon);

			newAcceptedTaxon.getSynonymRelations().add(newRel);

			newRel.setSynonym(syn);

			syn.addSynonymRelation(newRel);

			newRel.setType(relType);

		}

	}

//*********************** CLONE ********************************************************/

	@Override

	public Object clone() {

		Synonym result;

		result = (Synonym)super.clone();

		result.setSynonymRelations(new HashSet<SynonymRelationship>());

			for (SynonymRelationship synRelationship : this.getSynonymRelations()){

				SynonymRelationship newRelationship = (SynonymRelationship)synRelationship.clone();

				newRelationship.setRelatedFrom(result);

				result.synonymRelations.add(newRelationship);

			}

			return result;

	}

}