EDIT

/**

* Copyright (C) 2009 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.net.URI;

import java.util.HashSet;

import java.util.Iterator;

import java.util.List;

import java.util.Set;

import javax.persistence.Column;

import javax.persistence.FetchType;

import javax.persistence.MappedSuperclass;

import javax.persistence.OneToMany;

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.XmlAttribute;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlElementWrapper;

import javax.xml.bind.annotation.XmlSeeAlso;

import javax.xml.bind.annotation.XmlType;

import org.apache.log4j.Logger;

import org.hibernate.LazyInitializationException;

import org.hibernate.annotations.Cascade;

import org.hibernate.annotations.CascadeType;

import org.hibernate.annotations.Type;

import org.hibernate.envers.Audited;

import org.hibernate.search.annotations.Analyze;

import org.hibernate.search.annotations.Field;

import eu.etaxonomy.cdm.model.description.TextData;

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

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

@XmlAccessorType(XmlAccessType.FIELD)

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

    "uri",

    "termType",

    "representations"

})

@XmlSeeAlso({

    DefinedTermBase.class,

    TermVocabulary.class

})

@MappedSuperclass

@Audited

public abstract class TermBase

            extends IdentifiableEntity<IIdentifiableEntityCacheStrategy<TermBase>>

            implements IHasTermType {

    private static final long serialVersionUID = 1471561531632115822L;

    @SuppressWarnings("unused")

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

    @XmlElement(name = "URI")

    @Field(analyze = Analyze.NO)

    @Type(type="uriUserType")

    private URI uri;

	/**

	 * The {@link TermType type} of this term. Needs to be the same type in a {@link DefinedTermBase defined term}

	 * and in it's {@link TermVocabulary vocabulary}.

	 */

	@XmlAttribute(name ="TermType")

	@Column(name="termType")

	@NotNull

    @Type(type = "eu.etaxonomy.cdm.hibernate.EnumUserType",

        parameters = {@org.hibernate.annotations.Parameter(name  = "enumClass", value = "eu.etaxonomy.cdm.model.common.TermType")}

    )

	@Audited

	private TermType termType;

    @XmlElementWrapper(name = "Representations")

    @XmlElement(name = "Representation")

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

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

    // @IndexedEmbedded no need for embedding since we are using the DefinedTermBaseClassBridge

    private Set<Representation> representations = new HashSet<>();

//******************* CONSTRUCTOR *************************************/

    //for JAXB only, TODO needed?

    @Deprecated

    protected TermBase(){}

    protected TermBase(TermType type){

        super();

        if (type == null){

        	throw new IllegalArgumentException("TermType must not be null");

        }else{

        	this.termType = type;

        }

        initCacheStrategy();

    }

    protected TermBase(TermType type, String term, String label, String labelAbbrev) {

        this(type);

        this.addRepresentation(new Representation(term, label, labelAbbrev, Language.DEFAULT()) );

    }

    private void initCacheStrategy() {

        this.cacheStrategy = new TermDefaultCacheStrategy<TermBase>();

    }

//******************** GETTER /SETTER ********************************/

	@Override

    public TermType getTermType() {

		return termType;

	}

	@Deprecated //the term type should never be changed, might be removed in future

	public void setTermType(TermType termType) {

		this.termType = termType;

	}

    public Set<Representation> getRepresentations() {

        return this.representations;

    }

    public void addRepresentation(Representation representation) {

//        this.representations.add(representation);

        this.addToSetWithChangeEvent(this.representations, representation, "representations");

    }

    public void removeRepresentation(Representation representation) {

//        this.representations.remove(representation);

        this.removeFromSetWithChangeEvent(this.representations, representation, "representations");

    }

    public Representation getRepresentation(Language lang) {

        for (Representation repr : representations){

            Language reprLanguage = repr.getLanguage();

            if (reprLanguage != null && reprLanguage.equals(lang)){

                return repr;

            }

        }

        return null;

    }

    /**

     * @see #getPreferredRepresentation(Language)

     * @param language

     * @return

     */

    public Representation getPreferredRepresentation(Language language) {

        Representation repr = getRepresentation(language);

        if(repr == null){

            repr = getRepresentation(Language.DEFAULT());

        }

        if(repr == null){

            repr = getRepresentations().isEmpty() ? null : getRepresentations().iterator().next();

        }

        return repr;

    }

    /**

     * Returns the Representation in the preferred language. Preferred languages

     * are specified by the parameter languages, which receives a list of

     * Language instances in the order of preference. If no representation in

     * any preferred languages is found the method falls back to return the

     * Representation in Language.DEFAULT() and if necessary further falls back

     * to return the first element found if any.

     *

     * TODO think about this fall-back strategy &

     * see also {@link TextData#getPreferredLanguageString(List)}

     *

     * @param languages

     * @return

     */

    public Representation getPreferredRepresentation(List<Language> languages) {

        Representation repr = null;

        if(languages != null){

            for(Language language : languages) {

                repr = getRepresentation(language);

                if(repr != null){

                    return repr;

                }

            }

        }

        if(repr == null){

            repr = getRepresentation(Language.DEFAULT());

        }

        if(repr == null){

            Iterator<Representation> it = getRepresentations().iterator();

            if(it.hasNext()){

                repr = getRepresentations().iterator().next();

            }

        }

        return repr;

    }

    public URI getUri() {

        return this.uri;

    }

    public void setUri(URI uri) {

        this.uri = uri;

    }

    @Transient

    public String getLabel() {

        if(getLabel(Language.DEFAULT())!=null){

            Representation repr = getRepresentation(Language.DEFAULT());

            return (repr == null)? null :repr.getLabel();

        }else{

            for (Representation r : representations){

                if (r.getLabel()!= null){

                    return r.getLabel();

                }

            }

            if (representations.size()>0){

                return null;

            }else{

                return super.getUuid().toString();

            }

        }

    }

    public String getLabel(Language lang) {

        Representation repr = this.getRepresentation(lang);

        return (repr == null) ? null : repr.getLabel();

    }

    public void setLabel(String label){

        Language lang = Language.DEFAULT();

        setLabel(label, lang);

    }

    public void setLabel(String label, Language language){

        if (language != null){

            Representation repr = getRepresentation(language);

            if (repr != null){

                repr.setLabel(label);

            }else{

                repr = Representation.NewInstance(null, label, null, language);

                this.addRepresentation(repr);

            }

            this.titleCache = null; //force titleCache refresh

        }

    }

    @Transient

    public String getDescription() {

        return this.getDescription(Language.DEFAULT());

    }

    public String getDescription(Language lang) {

        Representation repr = this.getRepresentation(lang);

        return (repr == null) ? null :repr.getDescription();

    }

    @Override

    public String toString() {

        //TODO eliminate nasty LazyInitializationException logging

        try {

            return super.toString();

        } catch (LazyInitializationException e) {

            return super.toString()+" "+this.getUuid();

        }

    }

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

    /**

     * Clones <i>this</i> TermBase. This is a shortcut that enables to create

     * a new instance that differs only slightly from <i>this</i> TermBase by

     * modifying only some of the attributes.

     *

     * @see eu.etaxonomy.cdm.model.common.IdentifiableEntity#clone()

     * @see java.lang.Object#clone()

     */

    @Override

    public Object clone()throws CloneNotSupportedException {

        TermBase result = (TermBase) super.clone();

        result.representations = new HashSet<Representation>();

        for (Representation rep : this.representations){

            result.representations.add((Representation)rep.clone());

        }

        return result;

    }

}