## org.apache.xerces.impl.dv
Class SchemaDVFactory

    java.lang.Object
      |
      +--org.apache.xerces.impl.dv.SchemaDVFactory

Direct Known Subclasses:
  BaseDVFactory, SchemaDVFactoryImpl

public abstract class SchemaDVFactory
extends java.lang.Object

Defines a factory API that enables applications to

1. to get the instance of specified SchemaDVFactory implementation

2. to create/return built-in schema simple types

3. to create user defined simple types.

Implementations of this abstract class can be used to get built-in simple types and create user-defined simle types.

The implementation should store the built-in datatypes in static data, so that they can be shared by multiple parser instance, and multiple threads.

# INTERNAL:

  Usage of this class is not supported. It may be altered or removed at any time.

Version:
  $Id: SchemaDVFactory.java 558582 2007-07-23 02:05:04Z mrglavas $
Author:
  Sandy Gao, IBM

Constructor Summary
`protected` `SchemaDVFactory()`

Method Summary
`abstract XSSimpleType` `createTypeList(java.lang.String name, java.lang.String targetNamespace, short finalSet, XSSimpleType itemType, org.apache.xerces.xs.XSObjectList annotations)` Create a new simple type which is derived by list from another simple type.
`abstract XSSimpleType` `createTypeRestriction(java.lang.String name, java.lang.String targetNamespace, short finalSet, XSSimpleType base, org.apache.xerces.xs.XSObjectList annotations)` Create a new simple type which is derived by restriction from another simple type.
`abstract XSSimpleType` `createTypeUnion(java.lang.String name, java.lang.String targetNamespace, short finalSet, XSSimpleType[] memberTypes, org.apache.xerces.xs.XSObjectList annotations)` Create a new simple type which is derived by union from a list of other simple types.
`abstract XSSimpleType` `getBuiltInType(java.lang.String name)` Get a built-in simple type of the given name REVISIT: its still not decided within the Schema WG how to define the ur-types and if all simple types should be derived from a complex type, so as of now we ignore the fact that anySimpleType is derived from anyType, and pass 'null' as the base of anySimpleType.
`abstract SymbolHash` `getBuiltInTypes()` get all built-in simple types, which are stored in a SymbolHash keyed by the name
`static SchemaDVFactory` `getInstance()` Get a default instance of SchemaDVFactory implementation.
`static SchemaDVFactory` `getInstance(java.lang.String factoryClass)` Get an instance of SchemaDVFactory implementation.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### SchemaDVFactory

    protected SchemaDVFactory()

Method Detail

### getInstance

    public static final SchemaDVFactory getInstance()
                                             throws DVFactoryException

  Get a default instance of SchemaDVFactory implementation.
  Returns:
    an instance of SchemaDVFactory implementation
  Throws:
    `DVFactoryException` - cannot create an instance of the specified class name or the default class name

### getInstance

    public static final SchemaDVFactory getInstance(java.lang.String factoryClass)
                                             throws DVFactoryException

  Get an instance of SchemaDVFactory implementation.
  Parameters:
    `factoryClass` - name of the schema factory implementation to instantiate.
  Returns:
    an instance of SchemaDVFactory implementation
  Throws:
    `DVFactoryException` - cannot create an instance of the specified class name or the default class name

### getBuiltInType

    public abstract XSSimpleType getBuiltInType(java.lang.String name)

  Get a built-in simple type of the given name REVISIT: its still not decided within the Schema WG how to define the ur-types and if all simple types should be derived from a complex type, so as of now we ignore the fact that anySimpleType is derived from anyType, and pass 'null' as the base of anySimpleType. It needs to be changed as per the decision taken.
  Parameters:
    `name` - the name of the datatype
  Returns:
    the datatype validator of the given name

### getBuiltInTypes

    public abstract SymbolHash getBuiltInTypes()

  get all built-in simple types, which are stored in a SymbolHash keyed by the name
  Returns:
    a SymbolHash which contains all built-in simple types

### createTypeRestriction

    public abstract XSSimpleType createTypeRestriction(java.lang.String name,
                                                       java.lang.String targetNamespace,
                                                       short finalSet,
                                                       XSSimpleType base,
                                                       org.apache.xerces.xs.XSObjectList annotations)

  Create a new simple type which is derived by restriction from another simple type.
  Parameters:
    `name` - name of the new type, could be null
    `targetNamespace` - target namespace of the new type, could be null
    `finalSet` - value of "final"
    `base` - base type of the new type
    `annotations` - set of annotations
  Returns:
    the newly created simple type

### createTypeList

    public abstract XSSimpleType createTypeList(java.lang.String name,
                                                java.lang.String targetNamespace,
                                                short finalSet,
                                                XSSimpleType itemType,
                                                org.apache.xerces.xs.XSObjectList annotations)

  Create a new simple type which is derived by list from another simple type.
  Parameters:
    `name` - name of the new type, could be null
    `targetNamespace` - target namespace of the new type, could be null
    `finalSet` - value of "final"
    `itemType` - item type of the list type
    `annotations` - set of annotations
  Returns:
    the newly created simple type

### createTypeUnion

    public abstract XSSimpleType createTypeUnion(java.lang.String name,
                                                 java.lang.String targetNamespace,
                                                 short finalSet,
                                                 XSSimpleType[] memberTypes,
                                                 org.apache.xerces.xs.XSObjectList annotations)

  Create a new simple type which is derived by union from a list of other simple types.
  Parameters:
    `name` - name of the new type, could be null
    `targetNamespace` - target namespace of the new type, could be null
    `finalSet` - value of "final"
    `memberTypes` - member types of the union type
    `annotations` - set of annotations
  Returns:
    the newly created simple type

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