org.hibernate.mapping.OneToOne.java Source code

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Here is the source code for org.hibernate.mapping.OneToOne.java

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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.mapping;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.Objects;

import org.hibernate.MappingException;
import org.hibernate.boot.spi.MetadataBuildingContext;
import org.hibernate.boot.spi.MetadataImplementor;
import org.hibernate.type.EntityType;
import org.hibernate.type.ForeignKeyDirection;
import org.hibernate.type.Type;

/**
 * A one-to-one association mapping
 * @author Gavin King
 */
public class OneToOne extends ToOne {

    private boolean constrained;
    private ForeignKeyDirection foreignKeyType;
    private KeyValue identifier;
    private String propertyName;
    private String entityName;

    /**
     * @deprecated Use {@link OneToOne#OneToOne(MetadataBuildingContext, Table, PersistentClass)} instead.
     */
    @Deprecated
    public OneToOne(MetadataImplementor metadata, Table table, PersistentClass owner) throws MappingException {
        super(metadata, table);
        this.identifier = owner.getKey();
        this.entityName = owner.getEntityName();
    }

    public OneToOne(MetadataBuildingContext buildingContext, Table table, PersistentClass owner)
            throws MappingException {
        super(buildingContext, table);
        this.identifier = owner.getKey();
        this.entityName = owner.getEntityName();
    }

    public String getPropertyName() {
        return propertyName;
    }

    public void setPropertyName(String propertyName) {
        this.propertyName = propertyName == null ? null : propertyName.intern();
    }

    public String getEntityName() {
        return entityName;
    }

    public void setEntityName(String propertyName) {
        this.entityName = entityName == null ? null : entityName.intern();
    }

    public Type getType() throws MappingException {
        if (getColumnIterator().hasNext()) {
            return getMetadata().getTypeResolver().getTypeFactory().specialOneToOne(getReferencedEntityName(),
                    foreignKeyType, referenceToPrimaryKey, referencedPropertyName, isLazy(), isUnwrapProxy(),
                    entityName, propertyName, constrained);
        } else {
            return getMetadata().getTypeResolver().getTypeFactory().oneToOne(getReferencedEntityName(),
                    foreignKeyType, referenceToPrimaryKey, referencedPropertyName, isLazy(), isUnwrapProxy(),
                    entityName, propertyName, constrained);
        }
    }

    public void createForeignKey() throws MappingException {
        if (constrained && referencedPropertyName == null) {
            //TODO: handle the case of a foreign key to something other than the pk
            createForeignKeyOfEntity(((EntityType) getType()).getAssociatedEntityName());
        }
    }

    public java.util.List getConstraintColumns() {
        ArrayList list = new ArrayList();
        Iterator iter = identifier.getColumnIterator();
        while (iter.hasNext()) {
            list.add(iter.next());
        }
        return list;
    }

    /**
     * Returns the constrained.
     * @return boolean
     */
    public boolean isConstrained() {
        return constrained;
    }

    /**
     * Returns the foreignKeyType.
     * @return AssociationType.ForeignKeyType
     */
    public ForeignKeyDirection getForeignKeyType() {
        return foreignKeyType;
    }

    /**
     * Returns the identifier.
     * @return Value
     */
    public KeyValue getIdentifier() {
        return identifier;
    }

    /**
     * Sets the constrained.
     * @param constrained The constrained to set
     */
    public void setConstrained(boolean constrained) {
        this.constrained = constrained;
    }

    /**
     * Sets the foreignKeyType.
     * @param foreignKeyType The foreignKeyType to set
     */
    public void setForeignKeyType(ForeignKeyDirection foreignKeyType) {
        this.foreignKeyType = foreignKeyType;
    }

    /**
     * Sets the identifier.
     * @param identifier The identifier to set
     */
    public void setIdentifier(KeyValue identifier) {
        this.identifier = identifier;
    }

    public boolean isNullable() {
        return !constrained;
    }

    public Object accept(ValueVisitor visitor) {
        return visitor.accept(this);
    }

    @Override
    public boolean isSame(ToOne other) {
        return other instanceof OneToOne && isSame((OneToOne) other);
    }

    public boolean isSame(OneToOne other) {
        return super.isSame(other) && Objects.equals(foreignKeyType, other.foreignKeyType)
                && isSame(identifier, other.identifier) && Objects.equals(propertyName, other.propertyName)
                && Objects.equals(entityName, other.entityName) && constrained == other.constrained;
    }

}