1 files changed, 349 insertions, 0 deletions
diff --git a/lib/Class/MakeMethods/Evaled/Hash.pm b/lib/Class/MakeMethods/Evaled/Hash.pm
new file mode 100644
index 0000000..e306c76
--- /dev/null
+++ b/lib/Class/MakeMethods/Evaled/Hash.pm
@@ -0,0 +1,349 @@
+=head1 NAME
+
+Class::MakeMethods::Evaled::Hash - Typical hash methods
+
+
+=head1 SYNOPSIS
+
+  package MyObject;
+  use Class::MakeMethods::Evaled::Hash (
+    new => 'new',
+    scalar => [ 'foo', 'bar' ],
+    array => 'my_list',
+    hash => 'my_index',
+  );
+  ...
+  
+  # Constructor
+  my $obj = MyObject->new( foo => 'Foozle' );
+  
+  # Scalar Accessor
+  print $obj->foo();
+  
+  $obj->bar('Barbados'); 
+  print $obj->bar();
+  
+  # Array accessor
+  $obj->my_list(0 => 'Foozle', 1 => 'Bang!');
+  print $obj->my_list(1);
+  
+  # Hash accessor
+  $obj->my_index('broccoli' => 'Blah!', 'foo' => 'Fiddle');
+  print $obj->my_index('foo');
+
+
+=head1 DESCRIPTION
+
+The Evaled::Hash subclass of MakeMethods provides a simple constructor and accessors for blessed-hash object instances.
+
+=head2 Calling Conventions
+
+When you C<use> this package, the method names you provide
+as arguments cause subroutines to be generated and installed in
+your module.
+
+See L<Class::MakeMethods::Standard/"Calling Conventions"> for a summary, or L<Class::MakeMethods/"USAGE"> for full details.
+
+=head2 Declaration Syntax
+
+To declare methods, pass in pairs of a method-type name followed
+by one or more method names. Valid method-type names for this
+package are listed in L<"METHOD GENERATOR TYPES">.
+
+See L<Class::MakeMethods::Standard/"Declaration Syntax"> for more
+syntax information.
+
+
+=cut
+
+package Class::MakeMethods::Evaled::Hash;
+
+$VERSION = 1.000;
+use strict;
+use Class::MakeMethods::Evaled '-isasubclass';
+
+########################################################################
+
+=head1 METHOD GENERATOR TYPES
+
+=head2 new - Constructor
+
+For each method name passed, returns a subroutine with the following characteristics:
+
+=over 4
+
+=item *
+
+If called as a class method, makes a new hash and blesses it into that class.
+
+=item *
+
+If called on a hash-based instance, makes a copy of it and blesses the copy into the same class as the original instance.
+
+=item *
+
+If passed a list of key-value pairs, appends them to the new hash. These arguments override any copied values, and later arguments with the same name will override earlier ones.
+
+=item *
+
+Returns the new instance.
+
+=back
+
+Sample declaration and usage:
+
+  package MyObject;
+  use Class::MakeMethods::Evaled::Hash (
+    new => 'new',
+  );
+  ...
+  
+  # Bare constructor
+  my $empty = MyObject->new();
+  
+  # Constructor with initial values
+  my $obj = MyObject->new( foo => 'Foozle', bar => 'Barbados' );
+  
+  # Copy with overriding value
+  my $copy = $obj->new( bar => 'Bob' );
+
+=cut
+
+sub new {
+  (shift)->evaled_methods( q{
+    sub __NAME__ {
+      my $callee = shift;
+      if ( ref $callee ) {
+	bless { %$callee, @_ }, ref $callee;
+      } else {
+	bless { @_ }, $callee;
+      }
+    }
+  }, @_ )
+}
+
+########################################################################
+
+=head2 scalar - Instance Accessor
+
+For each method name passed, uses a closure to generate a subroutine with the following characteristics:
+
+=over 4
+
+=item *
+
+Must be called on a hash-based instance.
+
+=item *
+
+Uses the method name as a hash key to access the related value for each instance.
+
+=item *
+
+If called without any arguments returns the current value.
+
+=item *
+
+If called with an argument, stores that as the value, and returns it, 
+
+=back
+
+Sample declaration and usage:
+
+  package MyObject;
+  use Class::MakeMethods::Evaled::Hash (
+    scalar => 'foo',
+  );
+  ...
+  
+  # Store value
+  $obj->foo('Foozle');
+  
+  # Retrieve value
+  print $obj->foo;
+
+=cut
+
+sub scalar {
+  (shift)->evaled_methods( q{
+    sub __NAME__ {
+      my $self = shift;
+      if ( scalar @_ ) {
+	$self->{'__NAME__'} = shift;
+      } else {
+	$self->{'__NAME__'};
+      }
+    }
+  }, @_ )
+}
+
+########################################################################
+
+=head2 array - Instance Ref Accessor
+
+For each method name passed, uses a closure to generate a subroutine with the following characteristics:
+
+=over 4
+
+=item *
+
+Must be called on a hash-based instance.
+
+=item *
+
+Uses the method name as a hash key to access the related value for each instance.
+
+=item * 
+
+The value for each instance will be a reference to an array (or undef).
+
+=item *
+
+If called without any arguments, returns the current array-ref value (or undef).
+
+=item *
+
+If called with one argument, uses that argument as an index to retrieve from the referenced array, and returns that value (or undef). 
+
+=item *
+
+If called with a list of index-value pairs, stores the value at the given index in the referenced array. If the instance's value was previously undefined, a new array is autovivified. The current value in each position will be overwritten, and later arguments with the same index will override earlier ones. Returns the current array-ref value.
+
+=back
+
+Sample declaration and usage:
+  
+  package MyObject;
+  use Class::MakeMethods::Evaled::Hash (
+    array => 'bar',
+  );
+  ...
+  
+  # Set values by position
+  $obj->bar(0 => 'Foozle', 1 => 'Bang!');
+  
+  # Positions may be overwritten, and in any order
+  $obj->bar(2 => 'And Mash', 1 => 'Blah!');
+  
+  # Retrieve value by position
+  print $obj->bar(1);
+    
+  # Direct access to referenced array
+  print scalar @{ $obj->bar() };
+  
+  # Reset the array contents to empty
+  @{ $obj->bar() } = ();
+
+=cut
+
+sub array {
+  (shift)->evaled_methods( q{
+    sub __NAME__ {
+      my $self = shift;
+      if ( scalar(@_) == 0 ) {
+	return $self->{'__NAME__'};
+      } elsif ( scalar(@_) == 1 ) {
+	$self->{'__NAME__'}->[ shift() ];
+      } elsif ( scalar(@_) % 2 ) {
+	Carp::croak "Odd number of items in assigment to __NAME__";
+      } else {
+	while ( scalar(@_) ) {
+	  my $key = shift();
+	  $self->{'__NAME__'}->[ $key ] = shift();
+	}
+	return $self->{'__NAME__'};
+      }
+    }
+  }, @_ )
+}
+
+########################################################################
+
+=head2 hash - Instance Ref Accessor
+
+For each method name passed, uses a closure to generate a subroutine with the following characteristics:
+
+=over 4
+
+=item *
+
+Must be called on a hash-based instance.
+
+=item *
+
+Uses the method name as a hash key to access the related value for each instance.
+
+=item * 
+
+The value for each instance will be a reference to a hash (or undef).
+
+=item *
+
+If called without any arguments, returns the current hash-ref value (or undef).
+
+=item *
+
+If called with one argument, uses that argument as an index to retrieve from the referenced hash, and returns that value (or undef). 
+
+=item *
+
+If called with a list of key-value pairs, stores the value under the given key in the referenced hash. If the instance's value was previously undefined, a new hash is autovivified. The current value under each key will be overwritten, and later arguments with the same key will override earlier ones. Returns the current hash-ref value.
+
+=back
+
+Sample declaration and usage:
+  
+  package MyObject;
+  use Class::MakeMethods::Evaled::Hash (
+    hash => 'baz',
+  );
+  ...
+  
+  # Set values by key
+  $obj->baz('foo' => 'Foozle', 'bar' => 'Bang!');
+  
+  # Values may be overwritten, and in any order
+  $obj->baz('broccoli' => 'Blah!', 'foo' => 'Fiddle');
+  
+  # Retrieve value by key
+  print $obj->baz('foo');
+  
+  # Direct access to referenced hash
+  print keys %{ $obj->baz() };
+  
+  # Reset the hash contents to empty
+  @{ $obj->baz() } = ();
+
+=cut
+
+sub hash {
+  (shift)->evaled_methods( q{
+    sub __NAME__ {
+      my $self = shift;
+      if ( scalar(@_) == 0 ) {
+	return $self->{'__NAME__'};
+      } elsif ( scalar(@_) == 1 ) {
+	$self->{'__NAME__'}->{ shift() };
+      } elsif ( scalar(@_) % 2 ) {
+	Carp::croak "Odd number of items in assigment to '__NAME__'";
+      } else {
+	while ( scalar(@_) ) {
+	  $self->{'__NAME__'}->{ shift() } = shift();
+	}
+	return $self->{'__NAME__'};
+      }
+    }
+  }, @_ )
+}
+
+########################################################################
+
+=head1 SEE ALSO
+
+See L<Class::MakeMethods> for general information about this distribution. 
+
+See L<Class::MakeMethods::Evaled> for more about this family of subclasses.
+
+=cut
+
+1;