Examples of org.eclipse.persistence.internal.jpa.metadata.MetadataDescriptor

Package org.eclipse.persistence.internal.jpa.metadata

Examples of org.eclipse.persistence.internal.jpa.metadata.MetadataDescriptor

org.eclipse.persistence.internal.jpa.metadata.MetadataDescriptor
INTERNAL: Common metatata descriptor for the annotation and xml processors. This class is a wrap on an actual EclipseLink descriptor. @author Guy Pelletier @since TopLink EJB 3.0 Reference Implementation

            // Initialize the class with the package from entity mappings.
            Class entityClass = getClassForName(entity.getClassName());
            
            // Initialize the entity with its metadata descriptor and 
            // project.
            entity.initXMLClassAccessor(new MetadataClass(entityClass, this), new MetadataDescriptor(entityClass, entity), m_project);
            
            if (allEntities.containsKey(entityClass.getName())) {
                // Merge this entity with the existing one.
                allEntities.get(entityClass.getName()).merge(entity);
            } else {
                // Add this entity to the map.
                allEntities.put(entityClass.getName(), entity);
            }
        }
        
        // Process the embeddables.
        for (EmbeddableAccessor embeddable : getEmbeddables()) {
            // Initialize the class with the package from entity mappings.
            Class embeddableClass = getClassForName(embeddable.getClassName());
            
            // Initialize the embeddable with its metadata descriptor and
            // project.
            embeddable.initXMLClassAccessor(new MetadataClass(embeddableClass, this), new MetadataDescriptor(embeddableClass, embeddable), m_project);
            
            if (allEmbeddables.containsKey(embeddableClass.getName())) {
                // Merge this embeddable with the existing one.
                allEmbeddables.get(embeddableClass.getName()).merge(embeddable);
            } else {

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     * Set any entity-mappings defaults if specified. Do not blindly set them
     * since a global setting from the persistence-unit-metadata/defaults may
     * have been set and you do not want to risk removing the global value.
     */
    public void processEntityMappingsDefaults(ClassAccessor accessor) {
        MetadataDescriptor descriptor = accessor.getDescriptor();
        
        // Set the entity-mappings access if specified.
        if (m_access != null) {
            descriptor.setDefaultAccess(m_access);
        }
        
        // Set the entity-mappings catalog if specified.                
        if (m_catalog != null) {
            descriptor.setDefaultCatalog(m_catalog);
        }
        
        // Set the entity-mappings schema if specified.
        if (m_schema != null) {
            descriptor.setDefaultSchema(m_schema);
        }
    }

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     */
    protected String processMapKey(CollectionMapping mapping) {
        String mapKeyMethod = null;
        
        if (isMapCollectionAccessor()) {
            MetadataDescriptor referenceDescriptor = getReferenceDescriptor();
            
            if ((m_mapKey == null || m_mapKey.equals("")) && referenceDescriptor.hasCompositePrimaryKey()) {
                // No persistent property or field name has been provided, and
                // the reference class has a composite primary key class. Let
                // it fall through to return null for the map key. Internally,
                // EclipseLink will use an instance of the composite primary 
                // key class as the map key.
            } else {
                // A persistent property or field name may have have been 
                // provided. If one has not we will default to the primary
                // key of the reference class. The primary key cannot be 
                // composite at this point.
                String fieldOrPropertyName = getName(m_mapKey, referenceDescriptor.getIdAttributeName(), getLogger().MAP_KEY_ATTRIBUTE_NAME);
    
                // Look up the referenceAccessor
                MetadataAccessor referenceAccessor = referenceDescriptor.getAccessorFor(fieldOrPropertyName);
        
                if (referenceAccessor == null) {
                    throw ValidationException.couldNotFindMapKey(fieldOrPropertyName, referenceDescriptor.getJavaClass(), mapping);
                }
        
                mapKeyMethod = referenceAccessor.getAccessibleObjectName();
            }
        }

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     * used in the ordering must correspond to columns for which comparison
     * operators are supported.
     */
    protected void processOrderBy(CollectionMapping mapping) {
        if (m_orderBy != null) {
            MetadataDescriptor referenceDescriptor = getReferenceDescriptor();
            
            if (m_orderBy.equals("")) {
                // Default to the primary key field name(s).
                List<String> orderByAttributes = referenceDescriptor.getIdOrderByAttributeNames();
            
                if (referenceDescriptor.hasEmbeddedIdAttribute()) {
                    String embeddedIdAttributeName = referenceDescriptor.getEmbeddedIdAttributeName();
                
                    for (String orderByAttribute : orderByAttributes) {
                        mapping.addAggregateOrderBy(embeddedIdAttributeName, orderByAttribute, false);
                    }
                } else {
                    for (String orderByAttribute : orderByAttributes) {
                        mapping.addOrderBy(orderByAttribute, false);
                    }
                }
            } else {
                StringTokenizer commaTokenizer = new StringTokenizer(m_orderBy, ",");
            
                while (commaTokenizer.hasMoreTokens()) {
                    StringTokenizer spaceTokenizer = new StringTokenizer(commaTokenizer.nextToken());
                    String propertyOrFieldName = spaceTokenizer.nextToken();
                    MappingAccessor referenceAccessor = referenceDescriptor.getAccessorFor(propertyOrFieldName);
                
                    if (referenceAccessor == null) {
                        throw ValidationException.invalidOrderByValue(propertyOrFieldName, referenceDescriptor.getJavaClass(), getAccessibleObjectName(), getJavaClass());
                    }


                    String attributeName = referenceAccessor.getAttributeName();                    
                    String ordering = (spaceTokenizer.hasMoreTokens()) ? spaceTokenizer.nextToken() : ASCENDING;


                    if (referenceAccessor.isEmbedded()) {
                        for (String orderByAttributeName : referenceDescriptor.getOrderByAttributeNames()) {
                            mapping.addAggregateOrderBy(attributeName, orderByAttributeName, ordering.equals(DESCENDING));        
                        }
                    } else {
                        mapping.addOrderBy(attributeName, ordering.equals(DESCENDING));    
                    }

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     * process itself if it hasn't already done so. Assumes that a mapped by
     * value has been specified and that a check against mappedByValue has been
     * done.
     */
    protected DatabaseMapping getOwningMapping(String mappedBy) {
        MetadataDescriptor ownerDescriptor = getReferenceDescriptor();
        DatabaseMapping mapping = ownerDescriptor.getMappingForAttributeName(mappedBy, this);
        
        // If no mapping was found, there is an error in the mappedBy field, 
        // therefore, throw an exception.
        if (mapping == null) {
            throw ValidationException.noMappedByAttributeFound(ownerDescriptor.getJavaClass(), mappedBy, getJavaClass(), getAttributeName());
        }
        
        return mapping;
    }

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      * This method does additional checks to make sure that the target
      * entity is indeed an entity class.
      */
    @Override
    public MetadataDescriptor getReferenceDescriptor() {
        MetadataDescriptor descriptor;
       
        try {
            descriptor = super.getReferenceDescriptor();
        } catch (Exception exception) {
            descriptor = null;
        }
       
        if (descriptor == null || descriptor.isEmbeddable() || descriptor.isEmbeddableCollection()) {
            throw ValidationException.nonEntityTargetInRelationship(getJavaClass(), getReferenceClass(), getAnnotatedElement());
        }
       
        return descriptor;
    }

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     * Also this functionality is currently optional in the EJB 3.0 spec, but
     * since EclipseLink can handle it, it is implemented and assumes the user 
     * has properly configured its use since it will fail silently.
     */
    protected void processAssociationOverride(Object associationOverride, AggregateObjectMapping aggregateMapping) {
        MetadataDescriptor aggregateDescriptor = getReferenceDescriptor();
        
        // AssociationOverride.name(), the name of the attribute we want to
        // override.
        String name = (String) MetadataHelper.invokeMethod("name", associationOverride); 
        DatabaseMapping mapping = aggregateDescriptor.getMappingForAttributeName(name);
        
        if (mapping != null && mapping.isOneToOneMapping()) {
            int index = 0;
            
            for (Annotation joinColumn : (Annotation[]) MetadataHelper.invokeMethod("joinColumns", associationOverride)) {

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     * primary key entities. The processor should never get as far as to use 
     * them with entities that have a composite primary key (validation 
     * exception will be thrown).
     */
    protected void processOneToOnePrimaryKeyRelationship(OneToOneMapping mapping) {
        MetadataDescriptor referenceDescriptor = getReferenceDescriptor();
        List<PrimaryKeyJoinColumnMetadata> pkJoinColumns = processPrimaryKeyJoinColumns(new PrimaryKeyJoinColumnsMetadata(getPrimaryKeyJoinColumns()));


        // Add the source foreign key fields to the mapping.
        for (PrimaryKeyJoinColumnMetadata primaryKeyJoinColumn : pkJoinColumns) {
            // The default primary key name is the primary key field name of the
            // referenced entity.
            DatabaseField pkField = primaryKeyJoinColumn.getPrimaryKeyField();
            pkField.setName(getName(pkField, referenceDescriptor.getPrimaryKeyFieldName(), MetadataLogger.PK_COLUMN));
            pkField.setTable(referenceDescriptor.getPrimaryTable());
            
            // The default foreign key name is the primary key of the
            // referencing entity.
            DatabaseField fkField = primaryKeyJoinColumn.getForeignKeyField();
            fkField.setName(getName(fkField, getDescriptor().getPrimaryKeyFieldName(), MetadataLogger.FK_COLUMN));

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        // 1 - Check the access types from our parents if we are an inheritance 
        // sub-class. Inheritance hierarchies are processed top->down so our 
        // first parent that does not define an explicit access type will have 
        // the type we would want to default to.
        if (getDescriptor().isInheritanceSubclass()) {
            MetadataDescriptor parent = getDescriptor().getInheritanceParentDescriptor();
            while (parent != null) {
                if (! parent.getClassAccessor().hasAccess()) {
                    defaultAccessType = parent.getDefaultAccess();
                    break;
                }
                    
                parent = parent.getInheritanceParentDescriptor();
            }
        }
        
        // 2 - If there is no inheritance or no inheritance parent that does not 
        // explicitly define an access type. Let's check this entities mapped

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     */
    protected void processTableAndInheritance() {
        // If we are an inheritance subclass, ensure our root is processed 
        // first since it has information its subclasses depend on.
        if (getDescriptor().isInheritanceSubclass()) {
            MetadataDescriptor rootDescriptor = getDescriptor().getInheritanceRootDescriptor();
            EntityAccessor rootAccessor = (EntityAccessor) rootDescriptor.getClassAccessor();
            
            // An entity who didn't know they were the root of an inheritance 
            // hierarchy (that is, does not define inheritance metadata) must 
            // process and default the inheritance metadata.
            if (! rootAccessor.hasInheritance()) {    
                rootAccessor.processInheritance();
            }
            
            // Process the table metadata for this descriptor if either there
            // is an inheritance specification (we're a new root) or if we are
            // part of a joined or table per class inheritance strategy.
            if (hasInheritance() || ! rootDescriptor.usesSingleTableInheritanceStrategy()) {
                processTable();
            }
            
            // If this entity has inheritance metadata as well, then the 
            // inheritance strategy is mixed and we need to process the

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Related Classes of org.eclipse.persistence.internal.jpa.metadata.MetadataDescriptor

org.eclipse.persistence.descriptors.RelationalDescriptor

org.eclipse.persistence.descriptors.ReturningPolicy

org.eclipse.persistence.internal.descriptors.VirtualAttributeMethodInfo

org.eclipse.persistence.internal.helper.DatabaseField

org.eclipse.persistence.internal.helper.DatabaseTable

org.eclipse.persistence.internal.jpa.CMP3Policy

org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor

org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EmbeddableAccessor

org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor

org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.CollectionAccessor

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