add java cataloger

imgbom/cataloger/common/generic_cataloger.go

@@ -82,7 +82,7 @@ func (a *GenericCataloger) Catalog(contents map[file.Reference]string, upstreamM
 			continue
 		}
 
-		entries, err := parser(strings.NewReader(content))
+		entries, err := parser(string(reference.Path), strings.NewReader(content))
 		if err != nil {
 			log.Errorf("cataloger '%s' failed to parse entries (reference=%+v): %w", upstreamMatcher, reference, err)
 			continue

imgbom/cataloger/common/generic_cataloger_test.go

@@ -39,7 +39,7 @@ func (r *testResolver) FilesByGlob(patterns ...string) ([]file.Reference, error)
 	return []file.Reference{ref}, nil
 }
 
-func parser(reader io.Reader) ([]pkg.Package, error) {
+func parser(_ string, reader io.Reader) ([]pkg.Package, error) {
 	contents, err := ioutil.ReadAll(reader)
 	if err != nil {
 		panic(err)

imgbom/cataloger/common/parser.go

@@ -6,5 +6,5 @@ import (
 	"github.com/anchore/imgbom/imgbom/pkg"
 )
 
-// ParserFn standardizes a function signature for parser functions that accept file contents and return any discovered packages from that file
-type ParserFn func(io.Reader) ([]pkg.Package, error)
+// ParserFn standardizes a function signature for parser functions that accept the virtual file path (not usable for file reads) and contents and return any discovered packages from that file
+type ParserFn func(string, io.Reader) ([]pkg.Package, error)