com.novell.nds.dirxml.shimhost
Class NameMap

java.lang.Object
  com.novell.nds.dirxml.shimhost.NameMap

All Implemented Interfaces:

ConfigElement

public class NameMap
extends Object
implements ConfigElement

Class encapsulating DirXML Mapping Rule functionality.

This class can read and write an XML representation of the DirXML Mapping Rule and can be examined and edited programmatically.

To map the class names and attribute names in an XML document use the mapXML() method.

Nested Class Summary

static class	NameMap.AttrMap "Read-only" class for examining a single attribute mapping.
static class	NameMap.ClassMap "Read-only" class for examining the class mappings for a NameMap instance.

Field Summary

static String	ANY_CLASS Special class name used to specify "any class" for attributes that should be mapped regardless of class.
static String	ATTR_ATTR_NAME Name for XML attribute 'attr-name'.
static String	ATTR_CLASS_NAME Name for XML attribute 'class-name'.
static int	FROM_APP Parameter for mapXML(), specifying document to be mapped is being received from the application shim.
static String	TAG_APP_NAME Tag name for XML element 'app-name'.
static String	TAG_ATTR_NAME Tag name for XML element 'attr-name'.
static String	TAG_ATTR_NAME_MAP Tag name for XML element 'attr-name-map'.
static String	TAG_CLASS_NAME Tag name for XML element 'class-name'.
static String	TAG_NDS_NAME Tag name for XML element 'nds-name'.
static int	TO_APP Parameter for mapXML(), specifying document to be mapped is being sent to the application shim.

Constructor Summary

NameMap()
Create an empty NameMap instance.

NameMap(Element element)
Construct a NameMap instance from an XML representation.

Method Summary

void	addAttrMapping(String classNdsName, String attrNdsName, String attrAppName) Add a mapping for an attribute.
void	addClassMapping(String ndsName, String appName) Add a mapping for a class.
NameMap.ClassMap	getClassMap(String ndsName) Get a read-only object for a class that indicates the class and attribute name mappings.
boolean	hasBeenModified() Return true if this instance has been modified.
Iterator	iterator() Get an Iterator that will iterate through the class and attribute mappings in this instance.
String	mapAppAttrName(String appAttrName, String appClassName) Map an application attribute name into the corresponding name in the "nds" or "DirXML" namespace.
String	mapAppClassName(String appClassName) Map an application class name to the corresponding name in the "nds" or "DirXML" namespace.
String	mapNdsAttrName(String ndsAttrName, String ndsClassName) Map an attribute name in the "nds" or "DirXML" namespace into the corresponding name in application namespace.
String	mapNdsClassName(String ndsClassName) Map an nds or dirxml class name to the corresponding application class name.
void	mapXML(Node parent, int direction) Map an XML document subtree.
void	removeAttrMapping(String classNdsName, String attrNdsName) Remove an attribute mapping.
void	removeClassMapping(String ndsName) Remove a mapping for a class.
void	resetModified() Reset the modified flag for this instance such that hasBeenModified() will return false.
Element	toXML(Node parent) Create an XML representation of this NameMap instance.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TO_APP

public static final int TO_APP

Parameter for mapXML(), specifying document to be mapped is being sent to the application shim.

See Also:

mapXML(org.w3c.dom.Node, int), Constant Field Values

FROM_APP

public static final int FROM_APP

Parameter for mapXML(), specifying document to be mapped is being received from the application shim.

See Also:

mapXML(org.w3c.dom.Node, int), Constant Field Values

TAG_ATTR_NAME_MAP

public static final String TAG_ATTR_NAME_MAP

Tag name for XML element 'attr-name-map'.

See Also:

Constant Field Values

TAG_CLASS_NAME

public static final String TAG_CLASS_NAME

Tag name for XML element 'class-name'.

See Also:

Constant Field Values

TAG_ATTR_NAME

public static final String TAG_ATTR_NAME

Tag name for XML element 'attr-name'.

See Also:

Constant Field Values

TAG_NDS_NAME

public static final String TAG_NDS_NAME

Tag name for XML element 'nds-name'.

See Also:

Constant Field Values

TAG_APP_NAME

public static final String TAG_APP_NAME

Tag name for XML element 'app-name'.

See Also:

Constant Field Values

ATTR_CLASS_NAME

public static final String ATTR_CLASS_NAME

Name for XML attribute 'class-name'.

See Also:

Constant Field Values

ATTR_ATTR_NAME

public static final String ATTR_ATTR_NAME

Name for XML attribute 'attr-name'.

See Also:

Constant Field Values

ANY_CLASS

public static final String ANY_CLASS

Special class name used to specify "any class" for attributes that should be mapped regardless of class.

See Also:

Constant Field Values

Constructor Detail

NameMap

public NameMap()

Create an empty NameMap instance.

NameMap

public NameMap(Element element)
        throws XMLException

Construct a NameMap instance from an XML representation.

Parameters:

element - <attr-name-map> element containing XML representation

Throws:

XMLException - if the XML representation is somehow invalid.

Method Detail

hasBeenModified

public boolean hasBeenModified()

Return true if this instance has been modified.

The instance is considered to have been modified if a change was made that affects the persistent representation since:

1. The instance was constructed from an XML representation.
2. resetModified() was last called

Specified by:

hasBeenModified in interface ConfigElement

Returns:

true or false

See Also:

resetModified(), toXML(org.w3c.dom.Node)

resetModified

public void resetModified()

Reset the modified flag for this instance such that hasBeenModified() will return false.

Specified by:

resetModified in interface ConfigElement

See Also:

hasBeenModified()

addClassMapping

public void addClassMapping(String ndsName,
                            String appName)
                     throws IllegalArgumentException

Add a mapping for a class. If the mapping already exists nothing is changed.

Parameters:

ndsName - name of class in "nds" or "DirXML" space

appName - name of class in application space

Throws:

IllegalArgumentException - if the parameter ndsName is null, empty, or equal to ANY_CLASS.

removeClassMapping

public void removeClassMapping(String ndsName)
                        throws IllegalArgumentException

Remove a mapping for a class. If the mapping does not exist no action is taken.

Parameters:

ndsName - name of class in "nds" or "DirXML" space

Throws:

IllegalArgumentException - if the parameter ndsName is null, empty, or equal to ANY_CLASS.

addAttrMapping

public void addAttrMapping(String classNdsName,
                           String attrNdsName,
                           String attrAppName)
                    throws IllegalArgumentException,
                           IllegalStateException

Add a mapping for an attribute. The mapping may be class-specific, or may apply to all classes. To create a non-class-specific mapping, pass ANY_CLASS for the classNdsName parameter.

If the specified mapping already exists, no action is taken.

The if classNdsName is not ANY_CLASS the class mapping must already exist.

Parameters:

classNdsName - name of class in "nds" or "DirXML" space, or ANY_CLASS

attrNdsName - name of attribute in "nds" or "DirXML" space

attrAppName - name of attribute in application space

Throws:

IllegalArgumentException - if classNdsName is null or empty, or either attrNdsName or attrAppName is null or empty

IllegalStateException - if a class mapping for classNdsName doesn't exist

removeAttrMapping

public void removeAttrMapping(String classNdsName,
                              String attrNdsName)
                       throws IllegalArgumentException

Remove an attribute mapping. If the specified mapping doesn't exist, no action is taken.

To remove a non-class-specific mapping use ANY_CLASS as the classNdsName value.

Parameters:

classNdsName - name of class in "nds" or "DirXML" space, or ANY_CLASS

attrNdsName - name of attribute in "nds" or "DirXML" space

Throws:

IllegalArgumentException - if classNdsName is null or empty, or attrNdsName is null or empty

getClassMap

public NameMap.ClassMap getClassMap(String ndsName)
                             throws IllegalArgumentException

Get a read-only object for a class that indicates the class and attribute name mappings.

To get the non-class-specific attribute mappings specify ANY_CLASS for the ndsName parameter value.

Parameters:

ndsName - name of class in "nds" or "DirXML" space, or ANY_CLASS

Returns:

object containing mappings, or null if there is no mapping for the passed name

Throws:

IllegalArgumentException - if ndsName is null or empty

mapAppClassName

public String mapAppClassName(String appClassName)
                       throws IllegalArgumentException

Map an application class name to the corresponding name in the "nds" or "DirXML" namespace.

Parameters:

appClassName - name of application class (may not be null)

Returns:

name of class in nds or DirXML space, or null if no mapping exists.

Throws:

IllegalArgumentException - if appClassName is null or empty

mapAppAttrName

public String mapAppAttrName(String appAttrName,
                             String appClassName)

Map an application attribute name into the corresponding name in the "nds" or "DirXML" namespace.

If appClassName is null or empty then ANY_CLASS is used as the class name.

Parameters:

appAttrName - attribute name in the application namespace

appClassName - class name to use for class-specific mapping (may be null)

Returns:

attribute name in "nds" or "DirXML" namespace, or null if no mapping exists

mapNdsClassName

public String mapNdsClassName(String ndsClassName)
                       throws IllegalArgumentException

Map an nds or dirxml class name to the corresponding application class name.

Parameters:

ndsClassName - name of application class (may not be null)

Returns:

name of class in application space, or null if no mapping exists.

Throws:

IllegalArgumentException - if ndsClassName is null or empty

mapNdsAttrName

public String mapNdsAttrName(String ndsAttrName,
                             String ndsClassName)

Map an attribute name in the "nds" or "DirXML" namespace into the corresponding name in application namespace.

If ndsClassName is null or empty then ANY_CLASS is used as the class name.

Parameters:

ndsAttrName - attribute name in the "nds" or "DirXML" namespace

ndsClassName - class name to use for class-specific mapping (may be null)

Returns:

attribute name in application namespace, or null if no mapping exists

iterator

public Iterator iterator()

Get an Iterator that will iterate through the class and attribute mappings in this instance.

The Iterator's next() method will return ClassMap instances.

Returns:

iterator

See Also:

NameMap.ClassMap

toXML

public Element toXML(Node parent)

Create an XML representation of this NameMap instance.

Note that the act of creating an XML representation does not reset this instance's modified flag. It must be reset by calling resetModified().

Specified by:

toXML in interface ConfigElement

Parameters:

parent - Node under which to create XML representation

Returns:

created <attr-name-map> element

See Also:

hasBeenModified(), resetModified()

mapXML

public void mapXML(Node parent,
                   int direction)
            throws IllegalArgumentException

Map an XML document subtree. This potentially maps all 'class-name' and 'attr-name' XML attribute values.

Parameters:

parent - root of subtree to map

direction - TO_APP or FROM_APP

Throws:

IllegalArgumentException - if direction isn't one of TO_APP or FROM_APP