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:

EOKeyValueArchiving, 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.

To use another than the default "equals" operator, specify one of the following abbreviations:

• ne (not equals)
• gt (greater than)
• gte (greater than or equal)
• lt (less than)
• lte (less than or equal)
• like (case-sensitive like)
• ilike (case-insensitive like)

The following example will limit results to objects that don't have the same id as the source object (often useful for self-referencing relationships) and whose startDateTime is less than the source object's startDateTime:

  {
   "id" = {
     "ne" = "object.id"; 
   }; 
   "startDateTime" = {
     "lt" = "object.startDateTime"; 
   }; 
 }
 

See Also:

Serialized Form

Author:

ak

Nested Class Summary

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

EOKeyValueArchiving._NullValueSupport, EOKeyValueArchiving._NumberSupport, EOKeyValueArchiving._TimestampSupport, EOKeyValueArchiving.Awaking, EOKeyValueArchiving.FinishInitialization, EOKeyValueArchiving.Support

Field Summary

Fields

Modifier and Type	Field and Description
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

Constructors

Constructor and Description
ERDDelayedExtraQualifierAssignment(EOKeyValueUnarchiver u) Public constructor
ERDDelayedExtraQualifierAssignment(String key, Object value) Public constructor

Method Summary

Modifier and Type	Method and Description
static Object	decodeWithKeyValueUnarchiver(EOKeyValueUnarchiver eokeyvalueunarchiver) Static constructor required by the EOKeyValueUnarchiver interface.
protected EOQualifier	extraQualifier(com.webobjects.directtoweb.D2WContext c, NSDictionary<String,Object> dict)
Object	fireNow(com.webobjects.directtoweb.D2WContext c) Implemented by subclasses.
protected EOQualifier	qualifierForArray(String key, NSArray objects)
protected EOQualifier	qualifierForObject(String key, NSDictionary object)
protected EOQualifier	qualifierForObject(String key, Object object)
protected EOQualifier	qualifierForOperatorAndObject(String key, String operatorKey, Object value)

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(EOKeyValueUnarchiver u)

Public constructor

Parameters:

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

ERDDelayedExtraQualifierAssignment

public ERDDelayedExtraQualifierAssignment(String key,
                                          Object value)

Public constructor

Parameters:

key - context key

value - of the assignment

Method Detail

decodeWithKeyValueUnarchiver

public static Object decodeWithKeyValueUnarchiver(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 EOQualifier qualifierForArray(String key,
                                        NSArray objects)

qualifierForObject

protected EOQualifier qualifierForObject(String key,
                                         Object object)

qualifierForObject

protected EOQualifier qualifierForObject(String key,
                                         NSDictionary object)

qualifierForOperatorAndObject

protected EOQualifier qualifierForOperatorAndObject(String key,
                                                    String operatorKey,
                                                    Object value)

extraQualifier

protected EOQualifier extraQualifier(com.webobjects.directtoweb.D2WContext c,
                                     NSDictionary<String,Object> dict)

fireNow

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

Description copied from class: ERDDelayedAssignment

Implemented by subclasses.

Specified by:

fireNow in class ERDDelayedAssignment