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

                AggregateCollectionMapping mapping = (AggregateCollectionMapping)object;
                List sourceFields = mapping.getSourceKeyFields();
                List targetFields = mapping.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) {
                AggregateCollectionMapping mapping = (AggregateCollectionMapping)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(getPrimaryNamespaceXPath() + "target-foreign-key/" + getSecondaryNamespaceXPath() + "field-reference");

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                 */
                AggregateObjectMapping mapping = (AggregateObjectMapping)object;
                Vector associations = mapping.getAggregateToSourceFieldAssociations();
                Vector translations = new Vector(associations.size());
                for (int index = 0; index < associations.size(); index++) {
                    Association association = (Association)associations.get(index);
                    FieldTranslation translation = new FieldTranslation();
                    translation.setKey(new DatabaseField((String)association.getKey()));
                    translation.setValue(association.getValue());
                    translations.add(translation);
                }
                return translations;
            }


            public void setAttributeValueInObject(Object object, Object value) {
                AggregateObjectMapping mapping = (AggregateObjectMapping)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.setAggregateToSourceFieldAssociations(associations);
            }
        });

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        multipleTablesPrimaryKey.setAttributeAccessor(new AttributeAccessor() {
            public Object getAttributeValueFromObject(Object object) {
                ClassDescriptor mapping = (ClassDescriptor)object;
                Vector associations = mapping.getMultipleTablePrimaryKeyAssociations();
                for (int index = 0; index < associations.size(); index++) {
                    Association association = (Association)associations.get(index);
                    association.setKey(new DatabaseField((String)association.getKey()));
                    association.setValue(new DatabaseField((String)association.getValue()));
                }
                return associations;
            }


            public void setAttributeValueInObject(Object object, Object value) {
                ClassDescriptor mapping = (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());
                }
                mapping.setForeignKeyFieldNamesForMultipleTable(associations);
            }
        });
        multipleTablesPrimaryKey.setAttributeName("multipleTablesPrimaryKeys");
        multipleTablesPrimaryKey.setReferenceClass(Association.class);
        multipleTablesPrimaryKey.setXPath(getPrimaryNamespaceXPath() + "multiple-table-primary-keys/" + getSecondaryNamespaceXPath() + "field-reference");
        descriptor.addMapping(multipleTablesPrimaryKey);


        XMLCompositeCollectionMapping multipleTables = new XMLCompositeCollectionMapping();
        multipleTables.setReferenceClass(Association.class);
        multipleTables.setXPath(getPrimaryNamespaceXPath() + "multiple-table-foreign-keys/" + getSecondaryNamespaceXPath() + "field-reference");
        multipleTables.setAttributeAccessor(new AttributeAccessor() {
            public Object getAttributeValueFromObject(Object object) {
                ClassDescriptor mapping = (ClassDescriptor)object;
                Vector associations = mapping.getMultipleTableForeignKeyAssociations();
                for (int index = 0; index < associations.size(); index++) {
                    Association association = (Association)associations.get(index);
                    association.setKey(new DatabaseField((String)association.getKey()));
                    association.setValue(new DatabaseField((String)association.getValue()));
                }
                return associations;
            }


            public void setAttributeValueInObject(Object object, Object value) {
                ClassDescriptor mapping = (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());
                }
                mapping.setForeignKeyFieldNamesForMultipleTable(associations);
            }
        });
        multipleTables.setAttributeName("multipleTablesForeignKeys");

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


            public void setAttributeValueInObject(Object object, Object value) {
                DirectCollectionMapping mapping = (DirectCollectionMapping)object;
                List associations = (List)value;
                mapping.setSourceKeyFields(NonSynchronizedVector.newInstance(associations.size()));
                mapping.setReferenceKeyFields(NonSynchronizedVector.newInstance(associations.size()));
                Iterator iterator = associations.iterator();
                while (iterator.hasNext()) {
                    Association association = (Association)iterator.next();
                    mapping.getSourceKeyFields().add((DatabaseField)association.getValue());
                    mapping.getReferenceKeyFields().add((DatabaseField)association.getKey());
                }
            }
        });
        sourceToReferenceKeyFieldAssociationsMapping.setAttributeName("sourceToReferenceKeyFieldAssociations");
        sourceToReferenceKeyFieldAssociationsMapping.setXPath(getPrimaryNamespaceXPath() + "reference-foreign-key/" + getSecondaryNamespaceXPath() + "field-reference");

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


            public void setAttributeValueInObject(Object object, Object value) {
                ManyToManyMapping mapping = (ManyToManyMapping)object;
                List associations = (List)value;
                mapping.setSourceKeyFields(NonSynchronizedVector.newInstance(associations.size()));
                mapping.setSourceRelationKeyFields(NonSynchronizedVector.newInstance(associations.size()));
                Iterator iterator = associations.iterator();
                while (iterator.hasNext()) {
                    Association association = (Association)iterator.next();
                    mapping.getSourceKeyFields().add((DatabaseField)association.getValue());
                    mapping.getSourceRelationKeyFields().add((DatabaseField)association.getKey());
                }
            }
        });
        sourceToRelationKeyFieldAssociationsMapping.setAttributeName("sourceToRelationKeyFieldAssociationsMapping");
        sourceToRelationKeyFieldAssociationsMapping.setXPath(getSecondaryNamespaceXPath() + "source-relation-foreign-key/" + getSecondaryNamespaceXPath() + "field-reference");
        descriptor.addMapping(sourceToRelationKeyFieldAssociationsMapping);


        XMLCompositeCollectionMapping targetToRelationKeyFieldAssociationsMapping = new XMLCompositeCollectionMapping();
        targetToRelationKeyFieldAssociationsMapping.setReferenceClass(Association.class);
        // Handle translation of foreign key associations to hashtables.
        targetToRelationKeyFieldAssociationsMapping.setAttributeAccessor(new AttributeAccessor() {
            public Object getAttributeValueFromObject(Object object) {
                List targetFields = ((ManyToManyMapping)object).getTargetKeyFields();
                List relationFields = ((ManyToManyMapping)object).getTargetRelationKeyFields();
                List associations = new ArrayList(targetFields.size());
                for (int index = 0; index < targetFields.size(); index++) {
                    associations.add(new Association(relationFields.get(index), targetFields.get(index)));
                }
                return associations;
            }


            public void setAttributeValueInObject(Object object, Object value) {
                ManyToManyMapping mapping = (ManyToManyMapping)object;
                List associations = (List)value;
                mapping.setTargetKeyFields(NonSynchronizedVector.newInstance(associations.size()));
                mapping.setTargetRelationKeyFields(NonSynchronizedVector.newInstance(associations.size()));
                Iterator iterator = associations.iterator();
                while (iterator.hasNext()) {
                    Association association = (Association)iterator.next();
                    mapping.getTargetKeyFields().add((DatabaseField)association.getValue());
                    mapping.getTargetRelationKeyFields().add((DatabaseField)association.getKey());
                }
            }
        });
        targetToRelationKeyFieldAssociationsMapping.setAttributeName("targetToRelationKeyFieldAssociations");
        targetToRelationKeyFieldAssociationsMapping.setXPath(getSecondaryNamespaceXPath() + "target-relation-foreign-key/" + getSecondaryNamespaceXPath() + "field-reference");

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            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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     * 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
     */
    @Override
    public Object buildCollectionEntry(Object objectAdded, ObjectChangeSet changeSet){
        return new Association(changeSet.getNewKey(), objectAdded);
    }

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

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

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