org.hibernate.mapping.OneToMany.java Source code

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Here is the source code for org.hibernate.mapping.OneToMany.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.Iterator;
import java.util.Objects;

import org.hibernate.FetchMode;
import org.hibernate.MappingException;
import org.hibernate.boot.spi.MetadataBuildingContext;
import org.hibernate.boot.spi.MetadataImplementor;
import org.hibernate.engine.spi.Mapping;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.type.EntityType;
import org.hibernate.type.Type;

/**
 * A mapping for a one-to-many association
 *
 * @author Gavin King
 */
public class OneToMany implements Value {
    private final MetadataImplementor metadata;
    private final Table referencingTable;

    private String referencedEntityName;
    private PersistentClass associatedClass;
    private boolean ignoreNotFound;

    /**
     * @deprecated Use {@link OneToMany#OneToMany(MetadataBuildingContext, PersistentClass)} instead.
     */
    @Deprecated
    public OneToMany(MetadataImplementor metadata, PersistentClass owner) throws MappingException {
        this.metadata = metadata;
        this.referencingTable = (owner == null) ? null : owner.getTable();
    }

    public OneToMany(MetadataBuildingContext buildingContext, PersistentClass owner) throws MappingException {
        this.metadata = buildingContext.getMetadataCollector();
        this.referencingTable = (owner == null) ? null : owner.getTable();
    }

    @Override
    public ServiceRegistry getServiceRegistry() {
        return metadata.getMetadataBuildingOptions().getServiceRegistry();
    }

    private EntityType getEntityType() {
        return metadata.getTypeResolver().getTypeFactory().manyToOne(getReferencedEntityName(), true, null, false,
                false, isIgnoreNotFound(), false);
    }

    public PersistentClass getAssociatedClass() {
        return associatedClass;
    }

    /**
     * Associated entity on the many side
     */
    public void setAssociatedClass(PersistentClass associatedClass) {
        this.associatedClass = associatedClass;
    }

    public void createForeignKey() {
        // no foreign key element of for a one-to-many
    }

    public Iterator<Selectable> getColumnIterator() {
        return associatedClass.getKey().getColumnIterator();
    }

    public int getColumnSpan() {
        return associatedClass.getKey().getColumnSpan();
    }

    public FetchMode getFetchMode() {
        return FetchMode.JOIN;
    }

    /**
     * Table of the owner entity (the "one" side)
     */
    public Table getTable() {
        return referencingTable;
    }

    public Type getType() {
        return getEntityType();
    }

    public boolean isNullable() {
        return false;
    }

    public boolean isSimpleValue() {
        return false;
    }

    public boolean isAlternateUniqueKey() {
        return false;
    }

    public boolean hasFormula() {
        return false;
    }

    public boolean isValid(Mapping mapping) throws MappingException {
        if (referencedEntityName == null) {
            throw new MappingException("one to many association must specify the referenced entity");
        }
        return true;
    }

    public String getReferencedEntityName() {
        return referencedEntityName;
    }

    /**
     * Associated entity on the "many" side
     */
    public void setReferencedEntityName(String referencedEntityName) {
        this.referencedEntityName = referencedEntityName == null ? null : referencedEntityName.intern();
    }

    public void setTypeUsingReflection(String className, String propertyName) {
    }

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

    @Override
    public boolean isSame(Value other) {
        return this == other || other instanceof OneToMany && isSame((OneToMany) other);
    }

    public boolean isSame(OneToMany other) {
        return Objects.equals(referencingTable, other.referencingTable)
                && Objects.equals(referencedEntityName, other.referencedEntityName)
                && Objects.equals(associatedClass, other.associatedClass);
    }

    public boolean[] getColumnInsertability() {
        //TODO: we could just return all false...
        throw new UnsupportedOperationException();
    }

    public boolean[] getColumnUpdateability() {
        //TODO: we could just return all false...
        throw new UnsupportedOperationException();
    }

    public boolean isIgnoreNotFound() {
        return ignoreNotFound;
    }

    public void setIgnoreNotFound(boolean ignoreNotFound) {
        this.ignoreNotFound = ignoreNotFound;
    }

}