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## org.apache.fop.fo
Class ElementMappingRegistry

    java.lang.Object
      org.apache.fop.fo.ElementMappingRegistry

public class ElementMappingRegistry
extends java.lang.Object

This class keeps track of all configured ElementMapping implementations which are responsible for properly handling all kinds of different XML namespaces.

Field Summary
`protected java.util.Map` | `fobjTable` Table mapping element names to the makers of objects representing formatting objects.
`protected org.apache.commons.logging.Log` | `log` logging instance
`protected java.util.Map` | `namespaces` Map of mapped namespaces and their associated ElementMapping instances.

Constructor Summary
`ElementMappingRegistry(FopFactory factory)` Main constructor.

Method Summary
`void` | `addElementMapping(ElementMapping mapping)` Add the element mapping.
`void` | `addElementMapping(java.lang.String mappingClassName)` Add the element mapping with the given class name.
`ElementMapping.Maker` | `findFOMaker(java.lang.String namespaceURI, java.lang.String localName, org.xml.sax.Locator locator)` Finds the Maker used to create node objects of a particular type
`org.w3c.dom.DOMImplementation` | `getDOMImplementationForNamespace(java.lang.String namespaceURI)` Tries to determine the DOMImplementation that is used to handled a particular namespace.
`ElementMapping` | `getElementMapping(java.lang.String namespaceURI)` Returns an ElementMapping class for a namespace URI if there is one.
`boolean` | `isKnownNamespace(java.lang.String namespaceURI)` Indicates whether a namespace is known to FOP.

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

Field Detail

### log

    protected org.apache.commons.logging.Log log

  logging instance

### fobjTable

    protected java.util.Map fobjTable

  Table mapping element names to the makers of objects representing formatting objects.

### namespaces

    protected java.util.Map namespaces

  Map of mapped namespaces and their associated ElementMapping instances.

Constructor Detail

### ElementMappingRegistry

    public ElementMappingRegistry(FopFactory factory)

  Main constructor. Adds all default element mapping as well as detects ElementMapping through the Service discovery.

Parameters:
  `factory` - the Fop Factory

Method Detail

### addElementMapping

    public void addElementMapping(java.lang.String mappingClassName)
                           throws java.lang.IllegalArgumentException

  Add the element mapping with the given class name.

  Parameters:
    `mappingClassName` - the class name representing the element mapping.
  Throws:
    `java.lang.IllegalArgumentException` - if there was not such element mapping.

### addElementMapping

    public void addElementMapping(ElementMapping mapping)

  Add the element mapping.

  Parameters:
    `mapping` - the element mapping instance

### findFOMaker

    public ElementMapping.Maker findFOMaker(java.lang.String namespaceURI,
                                            java.lang.String localName,
                                            org.xml.sax.Locator locator)
                                     throws FOPException

  Finds the Maker used to create node objects of a particular type

  Parameters:
    `namespaceURI` - URI for the namespace of the element
    `localName` - name of the Element
    `locator` - the Locator instance for context information
  Returns:
    the ElementMapping.Maker that can create an FO object for this element
  Throws:
    `FOPException` - if a Maker could not be found for a bound namespace.

### getDOMImplementationForNamespace

    public org.w3c.dom.DOMImplementation getDOMImplementationForNamespace(java.lang.String namespaceURI)

  Tries to determine the DOMImplementation that is used to handled a particular namespace. The method may return null for namespaces that don't result in a DOM. It is mostly used in namespaces occurring in foreign objects.

  Parameters:
    `namespaceURI` - the namespace URI
  Returns:
    the handling DOMImplementation, or null if not applicable

### getElementMapping

    public ElementMapping getElementMapping(java.lang.String namespaceURI)

  Returns an ElementMapping class for a namespace URI if there is one.

  Parameters:
    `namespaceURI` - the namespace URI
  Returns:
    the requested ElementMapping or null, if no ElementMapping for the namespace is available.

### isKnownNamespace

    public boolean isKnownNamespace(java.lang.String namespaceURI)

  Indicates whether a namespace is known to FOP.

  Parameters:
    `namespaceURI` - the namespace URI
  Returns:
    true if the namespace is known.

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