er.directtoweb.assignments.delayed
Class ERDDelayedExtraQualifierAssignment

java.lang.Object
  com.webobjects.directtoweb.Assignment
      er.directtoweb.assignments.delayed.ERDDelayedAssignment
          er.directtoweb.assignments.delayed.ERDDelayedExtraQualifierAssignment

All Implemented Interfaces:

com.webobjects.eocontrol.EOKeyValueArchiving, java.io.Serializable

public class ERDDelayedExtraQualifierAssignment
extends ERDDelayedAssignment

Very useful when you want to restrict the things a user can see during searches or in list pages.
set it up via a rule like:

  entity.name = "Movie" and session.user.role <> "admin"
   =>
  extraRestrictingQualifier = {
      "studio" = "session.user.studios";
  } [er.directtoweb.ERDDelayedExtraQualifierAssignment]

then in your query page use sth like:

 public EODataSource queryDataSource() {
    EODataSource ds = super.queryDataSource();
    if (ds != null && (ds instanceof EODatabaseDataSource)) {
        EOFetchSpecification fs = ((EODatabaseDataSource)ds).fetchSpecification();
        EOQualifier q = fs.qualifier();
        EOQualifier extraQualifier = (EOQualifier)d2wContext().valueForKey("extraRestrictingQualifier");
        if(q != null && extraQualifier != null) {
            q = new EOAndQualifier(new NSArray(new Object[] {q, extraQualifier}));
        } else if(extraQualifier != null) {
            q = extraQualifier;
        }
        fs.setQualifier(q);
    }
    return ds;
 }

This should guarantee that the user can only see the Movies that are made by studios contained in his studio relationship. If the value is null, then this qualifier will not be added. To search for NULL, return NSKeyValueCoding.NullValue.

See Also:

Serialized Form

Author:

ak

Nested Class Summary

Nested classes/interfaces inherited from interface com.webobjects.eocontrol.EOKeyValueArchiving

com.webobjects.eocontrol.EOKeyValueArchiving._NullValueSupport, com.webobjects.eocontrol.EOKeyValueArchiving._NumberSupport, com.webobjects.eocontrol.EOKeyValueArchiving._TimestampSupport, com.webobjects.eocontrol.EOKeyValueArchiving.Awaking, com.webobjects.eocontrol.EOKeyValueArchiving.FinishInitialization, com.webobjects.eocontrol.EOKeyValueArchiving.Support

Field Summary

static org.apache.log4j.Logger

log logging support

Fields inherited from class com.webobjects.directtoweb.Assignment

KeyPathKey, ValueKey

Fields inherited from interface com.webobjects.eocontrol.EOKeyValueArchiving

_CLASS

Constructor Summary

ERDDelayedExtraQualifierAssignment(com.webobjects.eocontrol.EOKeyValueUnarchiver u)
Public constructor

ERDDelayedExtraQualifierAssignment(java.lang.String key, java.lang.Object value)
Public constructor

Method Summary

static java.lang.Object	decodeWithKeyValueUnarchiver(com.webobjects.eocontrol.EOKeyValueUnarchiver eokeyvalueunarchiver) Static constructor required by the EOKeyValueUnarchiver interface.
protected com.webobjects.eocontrol.EOQualifier	extraQualifier(com.webobjects.directtoweb.D2WContext c, com.webobjects.foundation.NSDictionary dict)
java.lang.Object	fireNow(com.webobjects.directtoweb.D2WContext c) Implemented by subclasses.
protected com.webobjects.eocontrol.EOQualifier	qualifierForArray(java.lang.String key, com.webobjects.foundation.NSArray objects)
protected com.webobjects.eocontrol.EOQualifier	qualifierForObject(java.lang.String key, java.lang.Object object)

Methods inherited from class er.directtoweb.assignments.delayed.ERDDelayedAssignment

fire

Methods inherited from class com.webobjects.directtoweb.Assignment

encodeWithKeyValueArchiver, keyPath, toString, value, value

Methods inherited from class java.lang.Object

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

Field Detail

log

public static final org.apache.log4j.Logger log

logging support

Constructor Detail

ERDDelayedExtraQualifierAssignment

public ERDDelayedExtraQualifierAssignment(com.webobjects.eocontrol.EOKeyValueUnarchiver u)

Public constructor

Parameters:

u - key-value unarchiver used when unarchiving from rule files.

ERDDelayedExtraQualifierAssignment

public ERDDelayedExtraQualifierAssignment(java.lang.String key,
                                          java.lang.Object value)

Public constructor

Parameters:

key - context key

value - of the assignment

Method Detail

decodeWithKeyValueUnarchiver

public static java.lang.Object decodeWithKeyValueUnarchiver(com.webobjects.eocontrol.EOKeyValueUnarchiver eokeyvalueunarchiver)

Static constructor required by the EOKeyValueUnarchiver interface. If this isn't implemented then the default behavior is to construct the first super class that does implement this method. Very lame.

Parameters:

eokeyvalueunarchiver - to be unarchived

Returns:

decoded assignment of this class

qualifierForArray

protected com.webobjects.eocontrol.EOQualifier qualifierForArray(java.lang.String key,
                                                                 com.webobjects.foundation.NSArray objects)

qualifierForObject

protected com.webobjects.eocontrol.EOQualifier qualifierForObject(java.lang.String key,
                                                                  java.lang.Object object)

extraQualifier

protected com.webobjects.eocontrol.EOQualifier extraQualifier(com.webobjects.directtoweb.D2WContext c,
                                                              com.webobjects.foundation.NSDictionary dict)

fireNow

public java.lang.Object fireNow(com.webobjects.directtoweb.D2WContext c)

Description copied from class: ERDDelayedAssignment

Implemented by subclasses.

Specified by:

fireNow in class ERDDelayedAssignment