From: Justin Hunter <justin.d.hunter@gmail.com>
Date: Mon, 20 Apr 2009 22:00:43 +0000 (+0000)
Subject: rip load_optional_class from DBIx::Class::Componentised and put it in Class::C3:... 
X-Git-Tag: v1.001000~24
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=078742b1464002054e7a2bb48a9d262cdddb7b17;p=p5sagit%2FClass-C3-Componentised.git

rip load_optional_class from DBIx::Class::Componentised and put it in Class::C3::Componentised
---

diff --git a/Changes b/Changes
index 29f8c5d..f3893b1 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,8 @@
 Revision history for Class-C3-Componentised
 
+1.0005   19 Apr 2009
+        Add load_optional_class method
+
 1.0004   18 Mar 2009
         Port to use MRO::Compat (rafl)
 
diff --git a/lib/Class/C3/Componentised.pm b/lib/Class/C3/Componentised.pm
index 2865eaf..c216fe0 100644
--- a/lib/Class/C3/Componentised.pm
+++ b/lib/Class/C3/Componentised.pm
@@ -46,7 +46,7 @@ use MRO::Compat;
 use Class::Inspector;
 use Carp;
 
-our $VERSION = 1.0004;
+our $VERSION = 1.0005;
 
 =head2 load_components( @comps )
 
@@ -168,6 +168,25 @@ sub inject_base {
   mro::set_mro($target, 'c3');
 }
 
+=head2 load_optional_class
+
+Returns a true value if the specified class is installed and loaded
+successfully, throws an exception if the class is found but not loaded
+successfully, and false if the class is not installed
+
+=cut
+
+sub load_optional_class {
+  my ($class, $f_class) = @_;
+  if ($class->ensure_class_found($f_class)) {
+    eval { $class->ensure_class_loaded($f_class) };
+    croak "Failed to load $f_class: $@" if $@;
+    return 1;
+  }
+  return 0;
+}
+
+
 =head1 AUTHOR
 
 Matt S. Trout and the DBIx::Class team
diff --git a/t/01-basic.t b/t/01-basic.t
index 8c3d5cb..fea4c38 100644
--- a/t/01-basic.t
+++ b/t/01-basic.t
@@ -8,7 +8,7 @@ use Test::Exception;
 use lib "$FindBin::Bin/lib";
 
 
-plan tests => 3;
+plan tests => 6;
 
 use_ok('MyModule');
 
@@ -23,3 +23,7 @@ throws_ok { MyModule->load_components('+ClassC3ComponentFooThatShouldntExist');
 
 is(MyModule->new->message, "Foo MyModule", "it worked");
 
+is(MyModule->load_optional_class('ClassC3ComponentFooThatShouldntExist'), 0, "load_optional_class NonexistantClass returned false");
+is(MyModule->load_optional_class('MyModule::Plugin::Foo'), 1, "load_optional_class MyModule::Plugin::Foo (previously loaded module) returned true");
+is(MyModule->load_optional_class('MyModule::OwnComponent'), 1, "load_optional_class MyModule::OwnComponent (not previously loaded module) returned true");
+