feat: add ActiveTable() accessor to versionaware.Transport

Expose the current VersionTable through a thread-safe read-locked
accessor, enabling callers to perform forward and reverse transaction
code lookups without going through ResolveCode.

Author: xaionaro@dx.center

binder/versionaware/transport.go

@@ -1111,5 +1111,13 @@ func (t *Transport) APILevel() int {
 	return t.apiLevel
 }
 
+// ActiveTable returns the current version table.
+// The returned map must not be modified by the caller.
+func (t *Transport) ActiveTable() VersionTable {
+	t.mu.RLock()
+	defer t.mu.RUnlock()
+	return t.table
+}
+
 // Verify Transport implements binder.VersionAwareTransport.
 var _ binder.VersionAwareTransport = (*Transport)(nil)

binder/versionaware/transport_table_test.go

@@ -0,0 +1,19 @@
+package versionaware
+
+import (
+	"testing"
+
+	"github.com/AndroidGoLab/binder/binder"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestTransport_ActiveTable(t *testing.T) {
+	table := VersionTable{
+		"android.app.IFoo": {
+			"doThing": binder.FirstCallTransaction + 0,
+		},
+	}
+	tr := &Transport{table: table}
+	got := tr.ActiveTable()
+	assert.Equal(t, binder.FirstCallTransaction, got.Resolve("android.app.IFoo", "doThing"))
+}