com.mentata.sg8
Class SG8DnSubsetAttribute

java.lang.Object
  com.mentata.l3d.L3DAttribute
      com.mentata.l3d.L3DDnAttribute
          com.mentata.sg8.SG8DnAttribute
              com.mentata.sg8.SG8DnSubsetAttribute

All Implemented Interfaces:

Comparator, SG8Attribute

public class SG8DnSubsetAttribute

extends SG8DnAttribute

A dn attribute limited to values of another attribute for use with SG8 objects. In its update form elements, this attribute type restricts selected values to those listed with another distinguished name attribute of the same containing object.

Since:

0.7

Author:

Jon Roberts

Field Summary

Fields inherited from interface com.mentata.sg8.SG8Attribute

TEXT_RESOURCES

Constructor Summary

SG8DnSubsetAttribute(String target, String superset)
Constructs an empty dn attribute with a named target object and superset attribute.

Method Summary

String	getUpdateHTML() Returns HTML form elements for choosing values from the values of the superset attribute.
boolean	processUpdateHTML(HttpServletRequest req) Reads and processes attribute changes from relevant HTML request form parameters.

Methods inherited from class com.mentata.sg8.SG8DnAttribute

getHTMLValues, getHyperlink, getMailTo, getSeparator, getSG8Object, getSG8Target, isAugmenting, isHTMLExceeded, setAugmenting, setHTMLThreshold, setSeparator

Methods inherited from class com.mentata.l3d.L3DDnAttribute

getShortValues, getTargetObject, initialize, isLengthExceeded, same

Methods inherited from class com.mentata.l3d.L3DAttribute

addValue, compare, getAttribute, getBind, getContext, getLabel, getLengthThreshold, getName, getObject, getObject, getPrerequisites, getSize, getThreshold, getValues, isBound, isExceeded, isGenerated, isMultivalue, isRequired, removeValue, setGenerated, setLabel, setLengthThreshold, setPrerequisites, setThreshold, setValues

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

SG8DnSubsetAttribute

public SG8DnSubsetAttribute(String target,
                            String superset)

Constructs an empty dn attribute with a named target object and superset attribute.

Parameters:

target - a target SG8 object name

superset - the name of an attribute from which values are chosen

Method Detail

getUpdateHTML

public String getUpdateHTML()
                     throws SG8Exception

Returns HTML form elements for choosing values from the values of the superset attribute.

Specified by:

getUpdateHTML in interface SG8Attribute

Overrides:

getUpdateHTML in class SG8DnAttribute

Returns:

the HTML modification form elements

Throws:

SG8Exception - if the attribute is generated or a value cannot be populated

processUpdateHTML

public boolean processUpdateHTML(HttpServletRequest req)
                          throws SG8Exception

Reads and processes attribute changes from relevant HTML request form parameters.

Specified by:

processUpdateHTML in interface SG8Attribute

Overrides:

processUpdateHTML in class SG8DnAttribute

Parameters:

req - a servlet request

Returns:

whether the attribute values changed

Throws:

SG8Exception - if form values are inappropriate or the attribute is generated