[RomaFramework-dev] [ romaframework-Feature Requests-1527489 ] Complex nested QueryByFilter usage

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Feature Requests item #1527489, was opened at 2006-07-24 00:23
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Category: JDO-JPOX-PersistenceAspect
Group: None
Status: Open
Priority: 5
Submitted By: Luca Garulli (lvca)
Assigned to: Luca Garulli (lvca)
Summary: Complex nested QueryByFilter usage

Initial Comment:
Let's consider to query for any practices with a debtor
with an address in a range of ZIP codes...

This is the requirements of a real world application.
Avoiding the use of JDOQL directly we can use the
QueryByFilter in much more advanced mode: nesting it!
;-) COOOOL

In this way you can query inside relationships (1-many,
many-to-many) and however inside collections.

Something like:

  @Override
  public void search() {
    QueryByFilter dynaFilter = new
QueryByFilter(Practice.class);

    if (getFilter().getEntity().getDebtor() != null)
      dynaFilter.addItem("debtor",
QueryByFilter.FIELD_EQUALS,
getFilter().getEntity().getDebtor());

    QueryByFilter capFilter = null;

    if (getFilter().getCapFrom() != null &&
getFilter().getCapFrom().length() > 0
        || getFilter().getCapTo() != null &&
getFilter().getCapTo().length() > 0)
      capFilter = new QueryByFilter(Address.class);

    if (getFilter().getCapFrom() != null &&
getFilter().getCapFrom().length() > 0)
      capFilter.addItem("zip",
QueryByFilter.FIELD_MAJOR_EQUALS,
getFilter().getCapFrom());

    if (getFilter().getCapTo() != null &&
getFilter().getCapTo().length() > 0)
      capFilter.addItem("zip",
QueryByFilter.FIELD_MINOR_EQUALS, getFilter().getCapTo());

    if (capFilter != null)
      dynaFilter.addItem("debtor.addresses",
QueryByFilter.FIELD_CONTAINS, capFilter);

    searchByFilter(dynaFilter);
  }

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