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Viewing changes to src/org/hibernate/tuple/PropertyFactory.java

  • Committer: Bazaar Package Importer
  • Author(s): Torsten Werner
  • Date: 2007-10-14 14:43:34 UTC
  • Revision ID: james.westby@ubuntu.com-20071014144334-eamc8i0q10gs1aro
Tags: upstream-3.2.5
Import upstream version 3.2.5

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src/org/hibernate/tuple/PropertyFactory.java
 
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// $Id: PropertyFactory.java 10119 2006-07-14 00:09:19Z steve.ebersole@jboss.com $
 
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package org.hibernate.tuple;
 
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import java.lang.reflect.Constructor;
 
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import org.hibernate.EntityMode;
 
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import org.hibernate.mapping.PropertyGeneration;
 
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import org.hibernate.engine.IdentifierValue;
 
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import org.hibernate.engine.UnsavedValueFactory;
 
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import org.hibernate.engine.VersionValue;
 
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import org.hibernate.id.IdentifierGenerator;
 
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import org.hibernate.mapping.KeyValue;
 
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import org.hibernate.mapping.PersistentClass;
 
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import org.hibernate.mapping.Property;
 
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import org.hibernate.property.Getter;
 
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import org.hibernate.property.PropertyAccessor;
 
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import org.hibernate.property.PropertyAccessorFactory;
 
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import org.hibernate.type.AssociationType;
 
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import org.hibernate.type.Type;
 
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import org.hibernate.type.VersionType;
 
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import org.hibernate.util.ReflectHelper;
 
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/**
 
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 * Responsible for generation of runtime metamodel {@link Property} representations.
 
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 * Makes distinction between identifier, version, and other (standard) properties.
 
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 *
 
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 * @author Steve Ebersole
 
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 */
 
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public class PropertyFactory {
 
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        /**
 
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         * Generates an IdentifierProperty representation of the for a given entity mapping.
 
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         *
 
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         * @param mappedEntity The mapping definition of the entity.
 
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         * @param generator The identifier value generator to use for this identifier.
 
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         * @return The appropriate IdentifierProperty definition.
 
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         */
 
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        public static IdentifierProperty buildIdentifierProperty(PersistentClass mappedEntity, IdentifierGenerator generator) {
 
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                String mappedUnsavedValue = mappedEntity.getIdentifier().getNullValue();
 
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                Type type = mappedEntity.getIdentifier().getType();
 
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                Property property = mappedEntity.getIdentifierProperty();
 
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                IdentifierValue unsavedValue = UnsavedValueFactory.getUnsavedIdentifierValue(
 
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                                mappedUnsavedValue,
 
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                                getGetter( property ),
 
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                                type,
 
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                                getConstructor(mappedEntity)
 
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                        );
 
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                if ( property == null ) {
 
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                        // this is a virtual id property...
 
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                        return new IdentifierProperty(
 
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                                type,
 
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                                        mappedEntity.hasEmbeddedIdentifier(),
 
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                                        mappedEntity.hasIdentifierMapper(),
 
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                                        unsavedValue,
 
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                                        generator
 
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                                );
 
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                }
 
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                else {
 
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                        return new IdentifierProperty(
 
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                                        property.getName(),
 
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                                        property.getNodeName(),
 
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                                        type,
 
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                                        mappedEntity.hasEmbeddedIdentifier(),
 
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                                        unsavedValue,
 
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                                        generator
 
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                                );
 
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                }
 
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        }
 
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        /**
 
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         * Generates a VersionProperty representation for an entity mapping given its
 
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         * version mapping Property.
 
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         *
 
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         * @param property The version mapping Property.
 
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         * @param lazyAvailable Is property lazy loading currently available.
 
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         * @return The appropriate VersionProperty definition.
 
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         */
 
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        public static VersionProperty buildVersionProperty(Property property, boolean lazyAvailable) {
 
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                String mappedUnsavedValue = ( (KeyValue) property.getValue() ).getNullValue();
 
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                VersionValue unsavedValue = UnsavedValueFactory.getUnsavedVersionValue(
 
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                                mappedUnsavedValue, 
 
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                                getGetter( property ),
 
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                                (VersionType) property.getType(),
 
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                                getConstructor( property.getPersistentClass() )
 
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                        );
 
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                boolean lazy = lazyAvailable && property.isLazy();
 
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                return new VersionProperty(
 
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                        property.getName(),
 
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                        property.getNodeName(),
 
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                        property.getValue().getType(),
 
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                        lazy,
 
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                                property.isInsertable(),
 
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                                property.isUpdateable(),
 
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                        property.getGeneration() == PropertyGeneration.INSERT || property.getGeneration() == PropertyGeneration.ALWAYS,
 
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                                property.getGeneration() == PropertyGeneration.ALWAYS,
 
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                                property.isOptional(),
 
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                                property.isUpdateable() && !lazy,
 
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                                property.isOptimisticLocked(),
 
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                        property.getCascadeStyle(),
 
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                        unsavedValue
 
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                        );
 
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        }
 
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        /**
 
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         * Generate a "standard" (i.e., non-identifier and non-version) based on the given
 
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         * mapped property.
 
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         *
 
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         * @param property The mapped property.
 
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         * @param lazyAvailable Is property lazy loading currently available.
 
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         * @return The appropriate StandardProperty definition.
 
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         */
 
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        public static StandardProperty buildStandardProperty(Property property, boolean lazyAvailable) {
 
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                final Type type = property.getValue().getType();
 
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                // we need to dirty check collections, since they can cause an owner
 
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                // version number increment
 
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                // we need to dirty check many-to-ones with not-found="ignore" in order 
 
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                // to update the cache (not the database), since in this case a null
 
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                // entity reference can lose information
 
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                boolean alwaysDirtyCheck = type.isAssociationType() && 
 
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                                ( (AssociationType) type ).isAlwaysDirtyChecked(); 
 
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                return new StandardProperty(
 
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                                property.getName(),
 
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                                property.getNodeName(),
 
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                                type,
 
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                                lazyAvailable && property.isLazy(),
 
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                                property.isInsertable(),
 
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                                property.isUpdateable(),
 
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                        property.getGeneration() == PropertyGeneration.INSERT || property.getGeneration() == PropertyGeneration.ALWAYS,
 
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                                property.getGeneration() == PropertyGeneration.ALWAYS,
 
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                                property.isOptional(),
 
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                                alwaysDirtyCheck || property.isUpdateable(),
 
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                                property.isOptimisticLocked(),
 
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                                property.getCascadeStyle(),
 
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                        property.getValue().getFetchMode()
 
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                        );
 
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        }
 
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        private static Constructor getConstructor(PersistentClass persistentClass) {
 
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                if ( persistentClass == null || !persistentClass.hasPojoRepresentation() ) {
 
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                        return null;
 
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                }
 
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                try {
 
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                        return ReflectHelper.getDefaultConstructor( persistentClass.getMappedClass() );
 
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                }
 
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                catch( Throwable t ) {
 
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                        return null;
 
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                }
 
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        }
 
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        private static Getter getGetter(Property mappingProperty) {
 
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                if ( mappingProperty == null || !mappingProperty.getPersistentClass().hasPojoRepresentation() ) {
 
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                        return null;
 
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                }
 
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                PropertyAccessor pa = PropertyAccessorFactory.getPropertyAccessor( mappingProperty, EntityMode.POJO );
 
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                return pa.getGetter( mappingProperty.getPersistentClass().getMappedClass(), mappingProperty.getName() );
 
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        }
 
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}