Examples of org.eclipse.persistence.mappings.Association

Package org.eclipse.persistence.mappings

Examples of org.eclipse.persistence.mappings.Association

org.eclipse.persistence.mappings.Association

Purpose: Generic association object. This can be used to map hashtable/map containers where the key and value primitives or independent objects. @author James Sutherland @since TOPLink/Java 3.0

            public Object getAttributeValueFromObject(Object object) {
                List sourceFields = ((OneToManyMapping)object).getSourceKeyFields();
                List targetFields = ((OneToManyMapping)object).getTargetForeignKeyFields();
                List associations = new ArrayList(sourceFields.size());
                for (int index = 0; index < sourceFields.size(); index++) {
                    associations.add(new Association(targetFields.get(index), sourceFields.get(index)));
                }
                return associations;
            }


            public void setAttributeValueInObject(Object object, Object value) {
                OneToManyMapping mapping = (OneToManyMapping)object;
                List associations = (List)value;
                mapping.setSourceKeyFields(NonSynchronizedVector.newInstance(associations.size()));
                mapping.setTargetForeignKeyFields(NonSynchronizedVector.newInstance(associations.size()));
                Iterator iterator = associations.iterator();
                while (iterator.hasNext()) {
                    Association association = (Association)iterator.next();
                    mapping.getSourceKeyFields().add((DatabaseField)association.getValue());
                    mapping.getTargetForeignKeyFields().add((DatabaseField)association.getKey());
                }
            }
        });
        sourceToTargetKeyFieldAssociationsMapping.setAttributeName("sourceToTargetKeyFieldAssociations");
        sourceToTargetKeyFieldAssociationsMapping.setXPath(getSecondaryNamespaceXPath() + "target-foreign-key/" + getSecondaryNamespaceXPath() + "field-reference");

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                Map sourceToTargetKeyFields = ((OneToOneMapping)object).getSourceToTargetKeyFields();
                List associations = new ArrayList(sourceToTargetKeyFields.size());
                Iterator iterator = sourceToTargetKeyFields.entrySet().iterator();
                while (iterator.hasNext()) {
                    Map.Entry entry = (Map.Entry)iterator.next();
                    associations.add(new Association(entry.getKey(), entry.getValue()));
                }
                return associations;
            }


            public void setAttributeValueInObject(Object object, Object value) {
                OneToOneMapping mapping = (OneToOneMapping)object;
                List associations = (List)value;
                mapping.setSourceToTargetKeyFields(new HashMap(associations.size() + 1));
                mapping.setTargetToSourceKeyFields(new HashMap(associations.size() + 1));
                Iterator iterator = associations.iterator();
                while (iterator.hasNext()) {
                    Association association = (Association)iterator.next();
                    mapping.getSourceToTargetKeyFields().put((DatabaseField)association.getKey(), (DatabaseField)association.getValue());
                    mapping.getTargetToSourceKeyFields().put((DatabaseField)association.getValue(), (DatabaseField)association.getKey());
                }
            }
        });
        sourceToTargetKeyFieldAssociationsMapping.setAttributeName("sourceToTargetKeyFieldAssociations");
        sourceToTargetKeyFieldAssociationsMapping.setXPath(getSecondaryNamespaceXPath() + "foreign-key/" + getSecondaryNamespaceXPath() + "field-reference");

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            public Object getAttributeValueFromObject(Object object) {
                VariableOneToOneMapping mapping = (VariableOneToOneMapping)object;
                Vector associations = mapping.getSourceToTargetQueryKeyFieldAssociations();
                Vector queryKeyReferences = new Vector(associations.size());
                for (int index = 0; index < associations.size(); index++) {
                    Association association = (Association)associations.get(index);
                    QueryKeyReference reference = new QueryKeyReference();
                    reference.setKey(new DatabaseField((String)association.getKey()));
                    reference.setValue(association.getValue());
                    queryKeyReferences.add(reference);
                }
                return queryKeyReferences;
            }


            public void setAttributeValueInObject(Object object, Object value) {
                VariableOneToOneMapping mapping = (VariableOneToOneMapping)object;
                Vector associations = (Vector)value;
                for (int index = 0; index < associations.size(); index++) {
                    Association association = (Association)associations.get(index);
                    association.setKey(((DatabaseField)association.getKey()).getQualifiedName());
                }
                mapping.setSourceToTargetQueryKeyFieldAssociations(associations);
            }
        });
        sourceFieldToTargetQueryKeyMapping.setReferenceClass(QueryKeyReference.class);

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            key = keyMapping.createMapComponentFromRow(record, null, session);
            
            value = valueMapping.createMapComponentFromRow(record, null, session);
            return addInto(key, value, container, session);
        } else if (element instanceof Association){
            Association record = (Association)element;
            key = record.getKey();
            value = record.getValue();
            return addInto(key, value, container, session);
        }
        return super.addInto(element, container, session);
    }

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     * @param referenceDescriptor
     */
    protected void createChangeSetForKeys(Map originalKeyValues, CollectionChangeRecord changeRecord, AbstractSession session, ClassDescriptor referenceDescriptor){
        Iterator originalKeyValuesIterator = originalKeyValues.values().iterator();
        while (originalKeyValuesIterator.hasNext()){
            Association association = (Association)originalKeyValuesIterator.next();
            Object object = association.getValue();
            ObjectChangeSet changeSet = referenceDescriptor.getObjectBuilder().createObjectChangeSet(object, (UnitOfWorkChangeSet) changeRecord.getOwner().getUOWChangeSet(), session);
            changeSet.setOldKey(association.getKey());
        }
    }

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    public Object createWrappedObjectFromExistingWrappedObject(Object wrappedObject, Object parent, ClassDescriptor referenceDescriptor, MergeManager mergeManager){
        Object key = ((Map.Entry)wrappedObject).getKey();
        key = keyMapping.getTargetVersionOfSourceObject(key, parent, mergeManager);
        key = keyMapping.wrapKey(key, mergeManager.getSession());
        Object value = referenceDescriptor.getObjectBuilder().wrapObject(mergeManager.getTargetVersionOfSourceObject(unwrapIteratorResult(wrappedObject)), mergeManager.getSession());
        return new Association(key, value);
    }

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    public Object getCloneDataFromChangeSet(ObjectChangeSet changeSet){
        Object key = changeSet.getNewKey();
        if (key == null){
            key = changeSet.getOldKey();
        }
        return new Association(key ,changeSet.getUnitOfWorkClone());
    }

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     * INTERNAL:
     * Return an object representing an entry in the collection represented by this container policy
     * This method will returns an Association containing the key and the value for a Map
     */
    public Object buildCollectionEntry(Object objectAdded, ObjectChangeSet changeSet){
        return new Association(changeSet.getNewKey(), objectAdded);
    }

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        if (hasElementDescriptor()) {
            object = getElementDescriptor().getObjectBuilder().unwrapObject(object, session);
        }
        Object key = next.getKey();
        key = unwrapKey(key, session);
        next = new Association(next.getKey(), object);
        return next;
    }

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        foreignKeyForMultipleTables.setAttributeAccessor(new AttributeAccessor() {
                public Object getAttributeValueFromObject(Object object) {
                    ClassDescriptor descriptor = (ClassDescriptor) object;
                    Vector associations = descriptor.getMultipleTableForeignKeyAssociations();
                    for (int index = 0; index < associations.size(); index++) {
                        Association association = (Association) associations.get(index);
                        String targetPrimaryKeyFieldName = (String) association.getKey();
                        association.setKey(new DatabaseField((String) association.getValue()));
                        association.setValue(new DatabaseField(targetPrimaryKeyFieldName));
                    }
                    return associations;
                }
                public void setAttributeValueInObject(Object object, Object value) {
                    ClassDescriptor descriptor = (ClassDescriptor) object;
                    Vector associations = (Vector) value;
                    for (int index = 0; index < associations.size(); index++) {
                        Association association = (Association) associations.get(index);
                        association.setKey(((DatabaseField) association.getKey()).getQualifiedName());
                        association.setValue(((DatabaseField) association.getValue()).getQualifiedName());
                    }
                    descriptor.setForeignKeyFieldNamesForMultipleTable(associations);
                }
            });
        descriptor.addMapping(foreignKeyForMultipleTables);

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