Difference between revisions of "EclipseLink/Development/DBWS/NamingConventionTransformer"

Revision as of 13:34, 12 September 2008

DBWS Schema Naming Convention Transformers

Document History

DBWS utility enhancement: Naming convention of generated schema types

bug 234677
The DBWSBuilder utility should allow the user to alter the names of the generated schema types.
The algorithm currently in use is very simple:

• table name ==> translate any characters un-supported by XML¹ ==> to_lowercase ==> add suffix 'Type' ==> top-level complex element type in .xsd file
• column name ==> translate characters ==> to_lowercase ==> element tag name²

¹ - same algorithm documented as part of the SQL/X specification (a.k.a. ISO/IEC 9075-14:2003 Part 14)
² - All columns expressed as XML elements

Proposed new Interface org.eclipse.persistence.tools.dbws.NamingConventionTransformer

The proposed fix for bug 234677 is the introduction of a new Interface class:

package org.eclipse.persistence.tools.dbws;
 
public interface NamingConventionTransformer {
 
    public enum ElementStyle {
        ELEMENT, ATTRIBYTE
    };
 
    public boolean isUserTransformer();
 
    public String generateTableAlias(String tableName);
 
    public String generateSchemaTypeAlias(String originalSchemaName);
 
    public String generateWrapperElementNameAlias(String originalWrapperElementName);
 
    public String generateElementNameAlias(String originalElementName);
 
    public ElementStyle styleForElement(String elementName);
}

The algorithm above will be converted to a series of transformers (operating as a Chain-of-Responsibility) that cooperate together to transform the database table's metadata
(table name, table columns) into the schema's <xsd:complexType> and <xsd:element>'s.

• isUserTransformer

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• generateTableAlias

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• generateWrapperElementNameAlias

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• generateElementNameAlias

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• ElementStyle styleForElement

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