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.common;

import java.beans.PropertyChangeEvent;

import java.beans.PropertyChangeListener;

import java.util.ArrayList;

import java.util.HashSet;

import java.util.List;

import java.util.Set;

import java.util.UUID;

import javax.persistence.Column;

import javax.persistence.Embedded;

import javax.persistence.FetchType;

import javax.persistence.MappedSuperclass;

import javax.persistence.OneToMany;

import javax.persistence.OrderColumn;

import javax.persistence.Transient;

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.XmlTransient;

import javax.xml.bind.annotation.XmlType;

import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

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.Analyze;

import org.hibernate.search.annotations.Field;

import org.hibernate.search.annotations.FieldBridge;

import org.hibernate.search.annotations.Fields;

import org.hibernate.search.annotations.Index;

import org.hibernate.search.annotations.SortableField;

import org.hibernate.search.annotations.Store;

import org.hibernate.validator.constraints.NotEmpty;

import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;

import eu.etaxonomy.cdm.hibernate.search.StripHtmlBridge;

import eu.etaxonomy.cdm.jaxb.FormattedTextAdapter;

import eu.etaxonomy.cdm.jaxb.LSIDAdapter;

import eu.etaxonomy.cdm.model.media.Rights;

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

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

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

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

import eu.etaxonomy.cdm.model.taxon.TaxonBase;

import eu.etaxonomy.cdm.strategy.cache.common.IIdentifiableEntityCacheStrategy;

import eu.etaxonomy.cdm.strategy.match.Match;

import eu.etaxonomy.cdm.strategy.match.Match.ReplaceMode;

import eu.etaxonomy.cdm.strategy.match.MatchMode;

import eu.etaxonomy.cdm.strategy.merge.Merge;

import eu.etaxonomy.cdm.strategy.merge.MergeMode;

import eu.etaxonomy.cdm.validation.Level2;

/**

 * Superclass for the primary CDM classes that can be referenced from outside via LSIDs and contain a simple generated title string as a label for human reading.

 * All subclasses inherit the ability to store additional properties that are stored as {@link Extension Extensions}, basically a string value with a type term.

 * Any number of right statements can be attached as well as multiple {@link OriginalSourceBase} objects.

 * Original sources carry a reference to the source, an ID within that source and the original title/label of this object as it was used in that source (originalNameString).

 * A Taxon for example that was taken from 2 sources like FaunaEuropaea and IPNI would have two originalSource objects.

 * The originalSource representing that taxon as it was found in IPNI would contain IPNI as the reference, the IPNI id of the taxon and the name of the taxon exactly as it was used in IPNI.

 *

 * @author m.doering

 * @version 1.0

 * @created 08-Nov-2007 13:06:27

 */

@XmlAccessorType(XmlAccessType.FIELD)

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

    "lsid",

    "titleCache",

    "protectedTitleCache",

    "credits",

    "extensions",

    "identifiers",

    "rights",

    "sources"

})

@Audited

@MappedSuperclass

public abstract class IdentifiableEntity<S extends IIdentifiableEntityCacheStrategy> extends SourceableEntity<IdentifiableSource>

        implements IIdentifiableEntity /*, ISourceable<IdentifiableSource> */ {

    private static final long serialVersionUID = -5610995424730659058L;

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

    @XmlTransient

    public static final boolean PROTECTED = true;

    @XmlTransient

    public static final boolean NOT_PROTECTED = false;

    @XmlElement(name = "LSID", type = String.class)

    @XmlJavaTypeAdapter(LSIDAdapter.class)

    @Embedded

    private LSID lsid;

    @XmlElement(name = "TitleCache", required = true)

    @XmlJavaTypeAdapter(FormattedTextAdapter.class)

    @Column(name="titleCache", length=800) //see #1592

    @Match(value=MatchMode.CACHE, cacheReplaceMode=ReplaceMode.ALL)

    @NotEmpty(groups = Level2.class) // implictly NotNull

    @Fields({

        @Field(store=Store.YES),

        //  If the field is only needed for sorting and nothing else, you may configure it as

        //  un-indexed and un-stored, thus avoid unnecessary index growth.

        @Field(name = "titleCache__sort", analyze = Analyze.NO, store=Store.NO, index = Index.NO)

    })

    @SortableField(forField = "titleCache__sort")

    @FieldBridge(impl=StripHtmlBridge.class)

    protected String titleCache;

    //if true titleCache will not be automatically generated/updated

    @XmlElement(name = "ProtectedTitleCache")

    protected boolean protectedTitleCache;

    @XmlElementWrapper(name = "Rights", nillable = true)

    @XmlElement(name = "Rights")

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

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

    //TODO

    @Merge(MergeMode.ADD_CLONE)

    @NotNull

    private Set<Rights> rights = new HashSet<Rights>();

    @XmlElementWrapper(name = "Credits", nillable = true)

    @XmlElement(name = "Credit")

    @OrderColumn(name="sortIndex")

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

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

    //TODO

    @Merge(MergeMode.ADD_CLONE)

    @NotNull

    private List<Credit> credits = new ArrayList<Credit>();

    @XmlElementWrapper(name = "Extensions", nillable = true)

    @XmlElement(name = "Extension")

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

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

    @Merge(MergeMode.ADD_CLONE)

    @NotNull

    private Set<Extension> extensions = new HashSet<Extension>();

    @XmlElementWrapper(name = "Identifiers", nillable = true)

    @XmlElement(name = "Identifier")

    @OrderColumn(name="sortIndex")

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

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

    @Merge(MergeMode.ADD_CLONE)

    @NotNull

    private List<Identifier> identifiers = new ArrayList<Identifier>();

//    @XmlElementWrapper(name = "Sources", nillable = true)

//    @XmlElement(name = "IdentifiableSource")

//    @OneToMany(fetch = FetchType.LAZY, orphanRemoval=true)

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

//    @Merge(MergeMode.ADD_CLONE)

//    @NotNull

//    private Set<IdentifiableSource> sources = new HashSet<IdentifiableSource>();

    @XmlTransient

    @Transient

    protected S cacheStrategy;

    protected IdentifiableEntity(){

        initListener();

    }

    @Override

    public void initListener(){

        PropertyChangeListener listener = new PropertyChangeListener() {

            @Override

            public void propertyChange(PropertyChangeEvent ev) {

                if (! "titleCache".equals(ev.getPropertyName()) && !"cacheStrategy".equals(ev.getPropertyName()) && ! isProtectedTitleCache()){

                    titleCache = null;

                }

            }

        };

        addPropertyChangeListener(listener);

    }

    /**

     * By default, we expect most cdm objects to be abstract things

     * i.e. unable to return a data representation.

     *

     * Specific subclasses (e.g. Sequence) can override if necessary.

     */

    @Override

    public byte[] getData() {

        return null;

    }

//******************************** CACHE *****************************************************/

    // @Transient  - must not be transient, since this property needs to to be included in all serializations produced by the remote layer

    @Override

    public String getTitleCache(){

        if (protectedTitleCache){

            return this.titleCache;

        }

        // is title dirty, i.e. equal NULL?

        if (titleCache == null){

            this.titleCache = generateTitle();

            this.titleCache = getTruncatedCache(this.titleCache) ;

        }

        return titleCache;

    }

    @Deprecated

    @Override

    public void setTitleCache(String titleCache){

    	//TODO shouldn't we call setTitleCache(String, boolean),but is this conformant with Java Bean Specification?

    	this.titleCache = getTruncatedCache(titleCache);

    }

    @Override

    public void setTitleCache(String titleCache, boolean protectCache){

        titleCache = getTruncatedCache(titleCache);

        this.titleCache = titleCache;

        this.protectedTitleCache = protectCache;

    }

    /**

     * @param cache

     * @return

     */

    @Transient

    protected String getTruncatedCache(String cache) {

        int maxLength = 800;

    	if (cache != null && cache.length() > maxLength){

            logger.warn("Truncation of cache: " + this.toString() + "/" + cache);

            cache = cache.substring(0, maxLength - 4) + "...";   //TODO do we need -4 or is -3 enough

        }

        return cache;

    }

//**************************************************************************************

    @Override

    public LSID getLsid(){

        return this.lsid;

    }

    @Override

    public void setLsid(LSID lsid){

        this.lsid = lsid;

    }

    @Override

    public Set<Rights> getRights() {

        if(rights == null) {

            this.rights = new HashSet<Rights>();

        }

        return this.rights;

    }

    @Override

    public void addRights(Rights right){

        getRights().add(right);

    }

    @Override

    public void removeRights(Rights right){

        getRights().remove(right);

    }

    @Override

    public List<Credit> getCredits() {

        if(credits == null) {

            this.credits = new ArrayList<Credit>();

        }

        return this.credits;

    }

    @Override

    public Credit getCredits(Integer index){

        return getCredits().get(index);

    }

    @Override

    public void addCredit(Credit credit){

        getCredits().add(credit);

    }

    @Override

    public void addCredit(Credit credit, int index){

        getCredits().add(index, credit);

    }

    @Override

    public void removeCredit(Credit credit){

        getCredits().remove(credit);

    }

    @Override

    public void removeCredit(int index){

        getCredits().remove(index);

    }

    @Override

    public boolean replaceCredit(Credit newObject, Credit oldObject){

        return replaceInList(this.credits, newObject, oldObject);

    }

    @Override

    public List<Identifier> getIdentifiers(){

        if(this.identifiers == null) {

            this.identifiers = new ArrayList<Identifier>();

        }

        return this.identifiers;

    }

    /**

     * @param type

     * @return a set of identifier value strings

     */

    public Set<String> getIdentifiers(DefinedTerm type){

       return getIdentifiers(type.getUuid());

    }

    /**

     * @param identifierTypeUuid

     * @return a set of identifier value strings

     */

    public Set<String> getIdentifiers(UUID identifierTypeUuid){

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

        for (Identifier identifier : getIdentifiers()){

            if (identifier.getType().getUuid().equals(identifierTypeUuid)){

                result.add(identifier.getIdentifier());

            }

        }

        return result;

    }

    @Override

    public Identifier addIdentifier(String identifier, DefinedTerm identifierType){

    	Identifier result = Identifier.NewInstance(this, identifier, identifierType);

    	return result;

    }

     @Override

    public void addIdentifier(int index, Identifier identifier){

        if (identifier != null){

        	if (identifier.getIdentifiedObj() != null && ! identifier.getIdentifiedObj().equals(this)){

        		identifier.getIdentifiedObj().removeIdentifier(identifier);

        	}

        	identifier.setIdentifiedObj(this);

        	//deduplication

        	int oldIndex = getIdentifiers().indexOf(identifier);

        	if(oldIndex > -1){

        		getIdentifiers().remove(identifier);

        		if (oldIndex < index){

        			index--;

        		}

        	}

        	getIdentifiers().add(index, identifier);

        }

    }

    @Override

    public void addIdentifier(Identifier identifier){

        addIdentifier(getIdentifiers().size(), identifier);

    }

    @Override

    public void removeIdentifier(Identifier identifier){

        if (identifier != null){

        	identifier.setIdentifiedObj(null);

            getIdentifiers().remove(identifier);

        }

    }

    @Override

    public void removeIdentifier(int index){

    	getIdentifiers().remove(index);

    }

    @Override

    public boolean replaceIdentifier(Identifier newObject, Identifier oldObject){

        return replaceInList(this.identifiers, newObject, oldObject);

    }

    @Override

    public Set<Extension> getExtensions(){

        if(extensions == null) {

            this.extensions = new HashSet<Extension>();

        }

        return this.extensions;

    }

    /**

     * @param type

     * @return a Set of extension value strings

     */

    public Set<String> getExtensions(ExtensionType type){

       return getExtensions(type.getUuid());

    }

    /**

     * @param extensionTypeUuid

     * @return a Set of extension value strings

     */

    public Set<String> getExtensions(UUID extensionTypeUuid){

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

        for (Extension extension : getExtensions()){

            if (extension.getType().getUuid().equals(extensionTypeUuid)){

                result.add(extension.getValue());

            }

        }

        return result;

    }

    public void addExtension(String value, ExtensionType extensionType){

        Extension.NewInstance(this, value, extensionType);

    }

    @Override

    public void addExtension(Extension extension){

        if (extension != null){

            extension.setExtendedObj(this);

            getExtensions().add(extension);

        }

    }

    @Override

    public void removeExtension(Extension extension){

        if (extension != null){

            extension.setExtendedObj(null);

            getExtensions().remove(extension);

        }

    }

    @Override

    public boolean isProtectedTitleCache() {

        return protectedTitleCache;

    }

    @Override

    public void setProtectedTitleCache(boolean protectedTitleCache) {

        this.protectedTitleCache = protectedTitleCache;

    }

//    @Override

//    public Set<IdentifiableSource> getSources() {

//        if(sources == null) {

//            this.sources = new HashSet<IdentifiableSource>();

//        }

//        return this.sources;

//    }

//

//    @Override

//    public void addSource(IdentifiableSource source) {

//        if (source != null){

//            IdentifiableEntity<?> oldSourcedObj = source.getSourcedObj();

//            if (oldSourcedObj != null && oldSourcedObj != this){

//                oldSourcedObj.getSources().remove(source);

//            }

//            getSources().add(source);

//            source.setSourcedObj(this);

//        }

//    }

//

//    @Override

//    public void addSources(Set<IdentifiableSource> sources) {

//        if (sources != null){

//        	for (IdentifiableSource source: sources){

//	            IdentifiableEntity<?> oldSourcedObj = source.getSourcedObj();

//	            if (oldSourcedObj != null && oldSourcedObj != this){

//	                oldSourcedObj.getSources().remove(source);

//	            }

//	            getSources().add(source);

//	            source.setSourcedObj(this);

//        	}

//        }

//    }

//

//    @Override

//    public IdentifiableSource addSource(OriginalSourceType type, String id, String idNamespace, Reference citation, String microCitation) {

//        if (id == null && idNamespace == null && citation == null && microCitation == null){

//            return null;

//        }

//        IdentifiableSource source = IdentifiableSource.NewInstance(type, id, idNamespace, citation, microCitation);

//        addSource(source);

//        return source;

//    }

//

//

//    @Override

//    public IdentifiableSource addImportSource(String id, String idNamespace, Reference<?> citation, String microCitation) {

//        if (id == null && idNamespace == null && citation == null && microCitation == null){

//            return null;

//        }

//        IdentifiableSource source = IdentifiableSource.NewInstance(OriginalSourceType.Import, id, idNamespace, citation, microCitation);

//        addSource(source);

//        return source;

//    }

//

//

//    @Override

//    public void removeSource(IdentifiableSource source) {

//        getSources().remove(source);

//    }

    //

    @Override

    public void removeSources() {

       this.sources.clear();

    }

    @Override

    protected IdentifiableSource sourceInstance(OriginalSourceType type, String id, String idNamespace,

            Reference<?> citation, String microCitation) {

        return IdentifiableSource.NewInstance(type, id, idNamespace, citation, microCitation);

    }

//******************************** TO STRING *****************************************************/

     @Override

    public String toString() {

        String result;

        if (titleCache == null){

            result = super.toString();

        }else{

            result = this.titleCache;

        }

        return result;

    }

    public int compareTo(IdentifiableEntity identifiableEntity) {

         int result = 0;

         if (identifiableEntity == null) {

             throw new NullPointerException("Cannot compare to null.");

         }

         // First, compare the name cache.

         // TODO: Avoid using instanceof operator

         // Use Class.getDeclaredMethod() instead to find out whether class has getNameCache() method?

         String specifiedNameCache = "";

         String thisNameCache = "";

         String specifiedTitleCache = "";

         String thisTitleCache = "";

         String specifiedReferenceTitleCache = "";

         String thisReferenceTitleCache = "";

         String thisGenusString = "";

         String specifiedGenusString = "";

         int thisrank_order = 0;

         final String HYBRID_SIGN = "\u00D7";

         final String QUOT_SIGN = "[\\u02BA\\u0022\\u0022]";

         //TODO we can remove all the deproxies here except for the first one

         identifiableEntity = HibernateProxyHelper.deproxy(identifiableEntity, IdentifiableEntity.class);

         if(identifiableEntity instanceof NonViralName) {

             specifiedNameCache = HibernateProxyHelper.deproxy(identifiableEntity, NonViralName.class).getNameCache();

             specifiedTitleCache = identifiableEntity.getTitleCache();

            if (identifiableEntity instanceof BotanicalName){

            	 if (((BotanicalName)identifiableEntity).isAutonym()){

            		 boolean isProtected = false;

            		 String oldNameCache = ((BotanicalName) identifiableEntity).getNameCache();

            		 if ( ((BotanicalName)identifiableEntity).isProtectedNameCache()){

            			 isProtected = true;

            		 }

            		 ((BotanicalName)identifiableEntity).setProtectedNameCache(false);

            		 ((BotanicalName)identifiableEntity).setNameCache(null, false);

            		 specifiedNameCache = ((BotanicalName) identifiableEntity).getNameCache();

            		 ((BotanicalName)identifiableEntity).setNameCache(oldNameCache, isProtected);

            	 }

             }

         } else if(identifiableEntity instanceof TaxonBase) {

             TaxonBase taxonBase = HibernateProxyHelper.deproxy(identifiableEntity, TaxonBase.class);

             TaxonNameBase<?,?> taxonNameBase = taxonBase.getName();

             NonViralName nonViralName = HibernateProxyHelper.deproxy(taxonNameBase, NonViralName.class);

             specifiedNameCache = nonViralName.getNameCache();

             specifiedTitleCache = taxonNameBase.getTitleCache();

             specifiedReferenceTitleCache = ((TaxonBase)identifiableEntity).getSec().getTitleCache();

             Reference reference = taxonBase.getSec();

             if (reference != null) {

                 reference = HibernateProxyHelper.deproxy(reference, Reference.class);

                 specifiedReferenceTitleCache = reference.getTitleCache();

             }

         }

         if(this.isInstanceOf(NonViralName.class)) {

             thisNameCache = HibernateProxyHelper.deproxy(this, NonViralName.class).getNameCache();

             thisTitleCache = getTitleCache();

             if (this instanceof BotanicalName){

            	 if (((BotanicalName)this).isAutonym()){

            		 boolean isProtected = false;

            		 String oldNameCache = ((BotanicalName) this).getNameCache();

            		 if ( ((BotanicalName)this).isProtectedNameCache()){

            			 isProtected = true;

            		 }

            		 ((BotanicalName)this).setProtectedNameCache(false);

            		 ((BotanicalName)this).setNameCache(null, false);

            		 thisNameCache = ((BotanicalName) this).getNameCache();

            		 ((BotanicalName)this).setNameCache(oldNameCache, isProtected);

            	 }

             }

         } else if(this.isInstanceOf(TaxonBase.class)) {

             TaxonNameBase<?,?> taxonNameBase= HibernateProxyHelper.deproxy(this, TaxonBase.class).getName();

             NonViralName nonViralName = HibernateProxyHelper.deproxy(taxonNameBase, NonViralName.class);

             thisNameCache = nonViralName.getNameCache();

             thisTitleCache = taxonNameBase.getTitleCache();

             thisReferenceTitleCache = ((TaxonBase)this).getSec().getTitleCache();

             thisGenusString = nonViralName.getGenusOrUninomial();

         }

         // Compare name cache of taxon names

         if (!specifiedNameCache.equals("") && !thisNameCache.equals("")) {

        	 thisNameCache = thisNameCache.replaceAll(HYBRID_SIGN, "");

        	 thisNameCache = thisNameCache.replaceAll(QUOT_SIGN, "");

        	 specifiedNameCache = specifiedNameCache.replaceAll(HYBRID_SIGN, "");

        	 specifiedNameCache = specifiedNameCache.replaceAll(QUOT_SIGN, "");

             result = thisNameCache.compareTo(specifiedNameCache);

         }

         // Compare title cache of taxon names

         if ((result == 0) && (!specifiedTitleCache.equals("") || !thisTitleCache.equals(""))) {

        	 thisTitleCache = thisTitleCache.replaceAll(HYBRID_SIGN, "");

        	 thisTitleCache = thisTitleCache.replaceAll(QUOT_SIGN, "");

        	 specifiedTitleCache = specifiedTitleCache.replaceAll(HYBRID_SIGN, "");

        	 specifiedTitleCache = specifiedTitleCache.replaceAll(QUOT_SIGN, "");

             result = thisTitleCache.compareTo(specifiedTitleCache);

         }

         // Compare title cache of taxon references

         if ((result == 0) && (!specifiedReferenceTitleCache.equals("") || !thisReferenceTitleCache.equals(""))) {

             result = thisReferenceTitleCache.compareTo(specifiedReferenceTitleCache);

         }

         return result;

     }

    /**

     * Returns the {@link eu.etaxonomy.cdm.strategy.cache.common.IIdentifiableEntityCacheStrategy cache strategy} used to generate

     * several strings corresponding to <i>this</i> identifiable entity

     * (in particular taxon name caches and author strings).

     *

     * @return  the cache strategy used for <i>this</i> identifiable entity

     * @see     eu.etaxonomy.cdm.strategy.cache.common.IIdentifiableEntityCacheStrategy

     */

    public S getCacheStrategy() {

        return this.cacheStrategy;

    }

    /**

     * @see 	#getCacheStrategy()

     */

    public void setCacheStrategy(S cacheStrategy) {

        this.cacheStrategy = cacheStrategy;

    }

    @Override

    public String generateTitle() {

        if (getCacheStrategy() == null){

            //logger.warn("No CacheStrategy defined for "+ this.getClass() + ": " + this.getUuid());

            return this.getClass() + ": " + this.getUuid();

        }else{

            return getCacheStrategy().getTitleCache(this);

        }

    }

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

    @Override

    public Object clone() throws CloneNotSupportedException{

        IdentifiableEntity<?> result = (IdentifiableEntity<?>)super.clone();

        //Extensions

        result.extensions = new HashSet<Extension>();

        for (Extension extension : getExtensions() ){

            Extension newExtension = (Extension)extension.clone();

            result.addExtension(newExtension);

        }

        //Identifier

        result.identifiers = new ArrayList<Identifier>();

        for (Identifier<?> identifier : getIdentifiers() ){

        	Identifier<?> newIdentifier = (Identifier<?>)identifier.clone();

            result.addIdentifier(newIdentifier);

        }

        //OriginalSources

        result.sources = new HashSet<IdentifiableSource>();

        for (IdentifiableSource source : getSources()){

            IdentifiableSource newSource = (IdentifiableSource)source.clone();

            result.addSource(newSource);

        }

        //Rights

        result.rights = new HashSet<Rights>();

        for(Rights rights : getRights()) {

            result.addRights(rights);

        }

        //Credits

        result.credits = new ArrayList<Credit>();

        for(Credit credit : getCredits()) {

            result.addCredit(credit);

        }

        //no changes to: lsid, titleCache, protectedTitleCache

        //empty titleCache

        if (! protectedTitleCache){

            result.titleCache = null;

        }

        result.initListener();

        return result;

    }

}