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package PJVM::Class; |
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use strict; |
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use warnings; |
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use PJVM::Class::ConstantPool; |
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use PJVM::Class::Field; |
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use PJVM::Class::Method; |
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use Object::Tiny qw( |
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constant_pool |
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access_flags |
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this_class |
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super_class |
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interfaces_classes |
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fields |
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methods |
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attributes |
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); |
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sub new_from_io { |
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my ($pkg, $io) = @_; |
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my $buff; |
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my $self = $pkg->new(); |
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# Check that's it is actually a class file |
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read $io, $buff, 4; |
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die "Not a classfile" unless sprintf("%x", unpack("N", $buff)) eq "cafebabe"; |
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# TODO: Blah blah blah.. version compliance crap, let's skip this for now and |
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# maybe sometime in the future do something with it. |
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read $io, $buff, 4; |
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# Constant pool count.. here lies our constants, ie class names etc. |
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my $cp = PJVM::Class::ConstantPool->new_from_io($io); |
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$self->{constant_pool} = $cp; |
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# Access flags (you know, public etc...) |
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read $io, $buff, 2; |
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my $access_flags = unpack("n", $buff); |
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$self->{access_flags} = $access_flags, |
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# Name of class and parent |
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read $io, $buff, 4; |
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my ($this_class, $super_class) = unpack("nn", $buff); |
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$self->{this_class} = $this_class, |
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$self->{super_class} = $super_class, |
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# Read interfaces |
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read $io, $buff, 2; |
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my $interface_count = unpack("n", $buff); |
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my @interfaces; |
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if ($interface_count) { |
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read $io, $buff, 2 * $interface_count; |
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@interfaces = unpack("n*", $buff); |
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} |
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$self->{interfaces_classes} = \@interfaces, |
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# Read fields |
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read $io, $buff, 2; |
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my $fields_count = unpack("n", $buff); |
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my @fields; |
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if ($fields_count) { |
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while ($fields_count--) { |
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push @fields, PJVM::Class::Field->new_from_io($io, $cp, $self); |
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} |
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} |
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$self->{fields} = \@fields, |
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# Read methods |
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read $io, $buff, 2; |
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my $methods_count = unpack("n", $buff); |
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my @methods; |
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if ($methods_count) { |
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while ($methods_count--) { |
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push @methods, PJVM::Class::Method->new_from_io($io, $cp, $self); |
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} |
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} |
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$self->{methods} = \@methods, |
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# Attributes |
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read $io, $buff, 2; |
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my $attributes_count = unpack("n", $buff); |
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# Read attributes |
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my @attributes; |
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if ($attributes_count) { |
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while ($attributes_count--) { |
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push @attributes, PJVM::Class::Attribute->new_from_io($io, $cp); |
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} |
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} |
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$self->{attributes} = \@attributes, |
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return $self; |
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} |
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# TODO: Optimize since this will probablly be called mucho tiempo |
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sub method { |
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my ($self, $name, $signature) = @_; |
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for my $method (@{$self->methods}) { |
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if ($method->name eq $name && $method->signature eq $signature) { |
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return $method; |
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} |
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} |
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} |
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sub name { |
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my $self = shift; |
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my $class = $self->constant_pool->get($self->this_class); |
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my $name = $self->constant_pool->get($class->name_index); |
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return $name->value; |
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} |
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sub super { |
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my $self = shift; |
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my $class = $self->constant_pool->get($self->super_class); |
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1
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my $name = $self->constant_pool->get($class->name_index); |
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1
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return $name->value; |
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} |
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sub interfaces { |
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my $self = shift; |
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my @names = map { |
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my $class = $self->constant_pool->get($_); |
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1
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my $name = $self->constant_pool->get($class->name_index); |
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1
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$name->value; |
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1
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} @{$self->interfaces_classes}; |
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1
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return @names; |
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} |
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1; |
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__END__ |