Hibernate example source code file (ManyToOneAttributeSourceImpl.java)

This example Hibernate source code file (ManyToOneAttributeSourceImpl.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

explicithibernatetypesource, fetchmode, iterable, iterable, list, list, localbindingcontext, manytooneattributesourceimpl, mappingexception, override, override, string, string, util, xmlmanytooneelement

The Hibernate ManyToOneAttributeSourceImpl.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.metamodel.source.hbm;

import java.util.List;

import org.hibernate.FetchMode;
import org.hibernate.engine.FetchStyle;
import org.hibernate.engine.FetchTiming;
import org.hibernate.engine.spi.CascadeStyle;
import org.hibernate.mapping.PropertyGeneration;
import org.hibernate.metamodel.source.LocalBindingContext;
import org.hibernate.metamodel.source.MappingException;
import org.hibernate.metamodel.source.binder.ExplicitHibernateTypeSource;
import org.hibernate.metamodel.source.binder.MetaAttributeSource;
import org.hibernate.metamodel.source.binder.RelationalValueSource;
import org.hibernate.metamodel.source.binder.SingularAttributeNature;
import org.hibernate.metamodel.source.binder.ToOneAttributeSource;
import org.hibernate.metamodel.source.hbm.jaxb.mapping.XMLManyToOneElement;

/**
 * Implementation for {@code <many-to-one/> mappings}
 *
 * @author Steve Ebersole
 */
class ManyToOneAttributeSourceImpl implements ToOneAttributeSource {
	private final XMLManyToOneElement manyToOneElement;
	private final LocalBindingContext bindingContext;
	private final List<RelationalValueSource> valueSources;

	ManyToOneAttributeSourceImpl(final XMLManyToOneElement manyToOneElement, LocalBindingContext bindingContext) {
		this.manyToOneElement = manyToOneElement;
		this.bindingContext = bindingContext;
		this.valueSources = Helper.buildValueSources(
				new Helper.ValueSourcesAdapter() {
					@Override
					public String getColumnAttribute() {
						return manyToOneElement.getColumn();
					}

					@Override
					public String getFormulaAttribute() {
						return manyToOneElement.getFormula();
					}

					@Override
					public List getColumnOrFormulaElements() {
						return manyToOneElement.getColumnOrFormula();
					}

					@Override
					public String getContainingTableName() {
						// todo : need to implement this...
						return null;
					}

					@Override
					public boolean isIncludedInInsertByDefault() {
						return manyToOneElement.isInsert();
					}

					@Override
					public boolean isIncludedInUpdateByDefault() {
						return manyToOneElement.isUpdate();
					}
				},
				bindingContext
		);
	}

	@Override
	public String getName() {
			return manyToOneElement.getName();
	}

	@Override
	public ExplicitHibernateTypeSource getTypeInformation() {
		return Helper.TO_ONE_ATTRIBUTE_TYPE_SOURCE;
	}

	@Override
	public String getPropertyAccessorName() {
		return manyToOneElement.getAccess();
	}

	@Override
	public boolean isInsertable() {
		return manyToOneElement.isInsert();
	}

	@Override
	public boolean isUpdatable() {
		return manyToOneElement.isUpdate();
	}

	@Override
	public PropertyGeneration getGeneration() {
		return PropertyGeneration.NEVER;
	}

	@Override
	public boolean isLazy() {
		return false;
	}

	@Override
	public boolean isIncludedInOptimisticLocking() {
		return manyToOneElement.isOptimisticLock();
	}

	@Override
	public Iterable<CascadeStyle> getCascadeStyles() {
		return Helper.interpretCascadeStyles( manyToOneElement.getCascade(), bindingContext );
	}

	@Override
	public FetchTiming getFetchTiming() {
		final String fetchSelection = manyToOneElement.getFetch() != null
				? manyToOneElement.getFetch().value()
				: null;
		final String lazySelection = manyToOneElement.getLazy() != null
				? manyToOneElement.getLazy().value()
				: null;
		final String outerJoinSelection = manyToOneElement.getOuterJoin() != null
				? manyToOneElement.getOuterJoin().value()
				: null;

		if ( lazySelection == null ) {
			if ( "join".equals( fetchSelection ) || "true".equals( outerJoinSelection ) ) {
				return FetchTiming.IMMEDIATE;
			}
			else if ( "false".equals( outerJoinSelection ) ) {
				return FetchTiming.DELAYED;
			}
			else {
				return bindingContext.getMappingDefaults().areAssociationsLazy()
						? FetchTiming.DELAYED
						: FetchTiming.IMMEDIATE;
			}
		}
		else  if ( "extra".equals( lazySelection ) ) {
			return FetchTiming.EXTRA_LAZY;
		}
		else if ( "true".equals( lazySelection ) ) {
			return FetchTiming.DELAYED;
		}
		else if ( "false".equals( lazySelection ) ) {
			return FetchTiming.IMMEDIATE;
		}

		throw new MappingException(
				String.format(
						"Unexpected lazy selection [%s] on '%s'",
						lazySelection,
						manyToOneElement.getName()
				),
				bindingContext.getOrigin()
		);
	}

	@Override
	public FetchStyle getFetchStyle() {
		// todo : handle batch fetches?

		final String fetchSelection = manyToOneElement.getFetch() != null
				? manyToOneElement.getFetch().value()
				: null;
		final String outerJoinSelection = manyToOneElement.getOuterJoin() != null
				? manyToOneElement.getOuterJoin().value()
				: null;

		if ( fetchSelection == null ) {
			if ( outerJoinSelection == null ) {
				return FetchStyle.SELECT;
			}
			else {
				if ( "auto".equals( outerJoinSelection ) ) {
					return bindingContext.getMappingDefaults().areAssociationsLazy()
							? FetchStyle.SELECT
							: FetchStyle.JOIN;
				}
				else {
					return "true".equals( outerJoinSelection ) ? FetchStyle.JOIN : FetchStyle.SELECT;
				}
			}
		}
		else {
			return "join".equals( fetchSelection ) ? FetchStyle.JOIN : FetchStyle.SELECT;
		}
	}

	@Override
	public FetchMode getFetchMode() {
		return manyToOneElement.getFetch() == null
				? FetchMode.DEFAULT
				: FetchMode.valueOf( manyToOneElement.getFetch().value() );
	}

	@Override
	public SingularAttributeNature getNature() {
		return SingularAttributeNature.MANY_TO_ONE;
	}

	@Override
	public boolean isVirtualAttribute() {
		return false;
	}

	@Override
	public boolean areValuesIncludedInInsertByDefault() {
		return manyToOneElement.isInsert();
	}

	@Override
	public boolean areValuesIncludedInUpdateByDefault() {
		return manyToOneElement.isUpdate();
	}

	@Override
	public boolean areValuesNullableByDefault() {
		return ! Helper.getBooleanValue( manyToOneElement.isNotNull(), false );
	}

	@Override
	public List<RelationalValueSource> relationalValueSources() {
		return valueSources;
	}

	@Override
	public boolean isSingular() {
		return true;
	}

	@Override
	public Iterable<MetaAttributeSource> metaAttributes() {
		return Helper.buildMetaAttributeSources( manyToOneElement.getMeta() );
	}

	@Override
	public String getReferencedEntityName() {
		return manyToOneElement.getClazz() != null
				? manyToOneElement.getClazz()
				: manyToOneElement.getEntityName();
	}

	@Override
	public String getReferencedEntityAttributeName() {
		return manyToOneElement.getPropertyRef();
	}
}