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Force.com Enterprise Architecture

You're reading from   Force.com Enterprise Architecture Blend industry best practices to architect and deliver packaged Force.com applications that cater to enterprise business needs

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Product type Paperback
Published in Sep 2014
Publisher
ISBN-13 9781782172994
Length 402 pages
Edition 1st Edition
Languages
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Author (1):
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Andrew Fawcett Andrew Fawcett
Author Profile Icon Andrew Fawcett
Andrew Fawcett
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Toc

Table of Contents (13) Chapters Close

Preface 1. Building, Publishing, and Supporting Your Application FREE CHAPTER 2. Leveraging Platform Features 3. Application Storage 4. Apex Execution and Separation of Concerns 5. Application Service Layer 6. Application Domain Layer 7. Application Selector Layer 8. User Interface 9. Providing Integration and Extensibility 10. Asynchronous Processing and Big Data Volumes 11. Source Control and Continuous Integration Index

Implementing the custom query logic


If we take a look at the implementation of the fflib_SObjectSelector.selectSObjectById base class method (at the time of writing this book), it is quite simple and gives a template as to the way we can implement custom Selector methods; it also highlights other base class methods we can use:

public List<SObject> selectSObjectsById(Set<Id> idSet)
{
  assertIsAccessible();
  return Database.query(buildQuerySObjectById());
}
private String buildQuerySObjectById()
{ 
  return String.format(
    'SELECT {0} FROM {1} WHERE id in :idSet ORDER BY {2}', 
     new List<String> 
       {getFieldListString(),getSObjectName(),getOrderBy()}); 
}

The getFieldListString method calls the getSObjectFieldList and getSObjectFieldSetList methods implemented in the preceding code. It basically takes the SObjectField lists that result from these methods and builds a single comma-delimited list of fields ready to be inserted into the SOQL query string. Also, note...

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