Examples of org.eclipse.persistence.sessions.DatabaseRecord

Package org.eclipse.persistence.sessions

Examples of org.eclipse.persistence.sessions.DatabaseRecord

org.eclipse.persistence.sessions.DatabaseRecord
Purpose: Define a representation of a database row as field=>value pairs. This is the database row implementation class, the Record or java.util.Map interfaces should be used to access this class instead of the implementation class.
Responsibilities:
- Implement the common hashtable collection protocol.
- Allow get and put on the field or field name.
@see DatabaseField @see Record @see java.util.Map

                record = new TransformationMappingChangeRecord(objectChangeSet);
                record.setAttribute(mapping.getAttributeName());
                record.setMapping(mapping);
                objectChangeSet.addChange(record);
            }
            AbstractRecord transformationRow = new DatabaseRecord(mapping.getFields().size());
            int size = mapping.getFields().size();
            for (int i = 0; i < size; i++) {
                DatabaseField fieldToAdd = mapping.getFields().get(i);
                Object value = ((AbstractTransformationMapping)mapping).valueFromObject(object, fieldToAdd, getSession());
                transformationRow.add(fieldToAdd, value);
            }
            record.setRow(transformationRow);
            if (handledMappings != null) {
                handledMappings.add(mapping);
            }

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     * INTERNAL:
     * Return Record containing output fields and values.
     * Called only if shouldBuildOutputRow method returns true.
     */
    public AbstractRecord buildOutputRow(CallableStatement statement) throws SQLException {
        AbstractRecord row = new DatabaseRecord();
        for (int index = 0; index < parameters.size(); index++) {
            Object parameter = parameters.elementAt(index);
            if (parameter instanceof OutputParameterForCallableStatement) {
                OutputParameterForCallableStatement outParameter = (OutputParameterForCallableStatement)parameter;
                if (!outParameter.isCursor()) {
                    Object value = statement.getObject(index + 1);
                    DatabaseField field = outParameter.getOutputField();
                    if (value instanceof Struct){
                        ClassDescriptor descriptor = this.getQuery().getSession().getDescriptor(field.getType());
                        if ((value!=null) && (descriptor!=null) && (descriptor.isObjectRelationalDataTypeDescriptor())){
                            AbstractRecord nestedRow = ((ObjectRelationalDataTypeDescriptor)descriptor).buildRowFromStructure((Struct)value);
                            ReadObjectQuery query = new ReadObjectQuery();
                            query.setSession(this.getQuery().getSession());
                            value = descriptor.getObjectBuilder().buildNewInstance();
                            descriptor.getObjectBuilder().buildAttributesIntoObject(value, nestedRow, query, null, false);
                        }
                    } else if ((value instanceof Array)&&( field.isObjectRelationalDatabaseField() )){
                        value = ObjectRelationalDataTypeDescriptor.buildContainerFromArray((Array)value, (ObjectRelationalDatabaseField)field, this.getQuery().getSession());
                    }
                    row.put(field, value);
                }
            }
        }


        return row;

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     * INTERNAL:
     * Add a field - value pair for LOB field into the context.
     */
    public void addContext(DatabaseField field, Object value) {
        if (contexts == null) {
            contexts = new DatabaseRecord(2);
        }
        contexts.add(field, value);
    }

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                values.add(null);
            }
        }


        // Row creation is optimized through sharing the same fields for the entire result set.
        return new DatabaseRecord(fields, values);
    }

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            AbstractRecord parentRow = row;
            // Must adjust for the parent index to ensure the correct pk is extracted.
            if (parentIndex > 0) {
                Vector trimedFields = new NonSynchronizedSubVector(row.getFields(), parentIndex, row.size());
                Vector trimedValues = new NonSynchronizedSubVector(row.getValues(), parentIndex, row.size());
                parentRow = new DatabaseRecord(trimedFields, trimedValues);
            }
            // Extract the primary key of the source object, to filter only the joined rows for that object.
            Vector sourceKey = builder.extractPrimaryKeyFromRow(parentRow, session);
            // May be any outer-join so ignore null.
            if (sourceKey != null) {

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     * Build a phantom row that contains only the fields
     * for the mapping, populated with the values generated by
     * invoking the field methods on the specified object.
     */
    protected AbstractRecord buildPhantomRowFrom(Object domainObject, AbstractSession session) {
      AbstractRecord row = new DatabaseRecord(this.getFieldToTransformers().size());
        for (Enumeration stream = this.getFieldToTransformers().elements();
                 stream.hasMoreElements();) {
            Object[] pair = (Object[])stream.nextElement();
            DatabaseField field = (DatabaseField)pair[0];
            FieldTransformer transformer = (FieldTransformer)pair[1];
            Object fieldValue = this.invokeFieldTransformer(field, transformer, domainObject, session);
            row.put(field, fieldValue);
        }
        return row;
    }

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     * Extracts value from return row and set the attribute to the value in the object.
     * Return row is merged into object after execution of insert or update call
     * accordiing to ReturningPolicy.
     */
    public Object readFromReturnRowIntoObject(AbstractRecord row, Object object, ReadObjectQuery query, Collection handledMappings) throws DatabaseException {
        AbstractRecord transformationRow = new DatabaseRecord(getFields().size());
        for (int i = 0; i < getFields().size(); i++) {
            DatabaseField field = getFields().elementAt(i);
            Object value;
            if (row.containsKey(field)) {
                value = row.get(field);
            } else {
                value = valueFromObject(object, field, query.getSession());
            }
            transformationRow.add(field, value);
        }
        Object attributeValue = readFromRowIntoObject(transformationRow, null, object, query, query.getSession());
        if (handledMappings != null) {
            handledMappings.add(this);
        }

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            DatabaseField targetPrimaryKey = targetPrimaryKeyFields.get(index);
            Expression expression = builder.getField(targetPrimaryKey).equal(builder.getParameter(targetPrimaryKey));
            whereClause = expression.and(whereClause);
        }


        AbstractRecord modifyRow = new DatabaseRecord();
        size = targetForeignKeyFields.size();
        for (int index = 0; index < size; index++) {
            DatabaseField targetForeignKey = targetForeignKeyFields.get(index);
            modifyRow.put(targetForeignKey, null);
        }


        SQLUpdateStatement statement = new SQLUpdateStatement();
        statement.setTable(getReferenceDescriptor().getDefaultTable());
        statement.setWhereClause(whereClause);

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            DatabaseField targetPrimaryKey = targetPrimaryKeyFields.get(index);
            Expression expression = builder.getField(targetPrimaryKey).equal(builder.getParameter(targetPrimaryKey));
            whereClause = expression.and(whereClause);
        }


        AbstractRecord modifyRow = new DatabaseRecord();
        size = targetForeignKeyFields.size();
        for (int index = 0; index < size; index++) {
            DatabaseField targetForeignKey = targetForeignKeyFields.get(index);
            modifyRow.put(targetForeignKey, null);
            Expression expression = builder.getField(targetForeignKey).equal(builder.getParameter(targetForeignKey));
            whereClause = expression.and(whereClause);
        }


        SQLUpdateStatement statement = new SQLUpdateStatement();

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        // Build where clause expression.
        Expression whereClause = null;
        Expression builder = new ExpressionBuilder();


        AbstractRecord modifyRow = new DatabaseRecord();
        int size = targetForeignKeyFields.size();
        for (int index = 0; index < size; index++) {
            DatabaseField targetForeignKey = targetForeignKeyFields.get(index);
            modifyRow.put(targetForeignKey, null);
            Expression expression = builder.getField(targetForeignKey).equal(builder.getParameter(targetForeignKey));
            whereClause = expression.and(whereClause);
        }


        SQLUpdateStatement statement = new SQLUpdateStatement();

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