How to move all records from one location to another in Firestore Database (Android Studio)

How to move all Firebase database records (not a specific record with an id) from a specific location to another. Code for moving certain records:

delete.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        CollectionReference addToCartRef1 = firestore.collection("AddToCart");
                        DocumentReference addToCartRef2 = addToCartRef1.document(auth.getCurrentUser().getUid());
                        CollectionReference addToCartRef3 = addToCartRef2.collection("Product");
                        DocumentReference fromPath = addToCartRef3.document("DiaSef1RX9xlAFm26P8M");
        
                        CollectionReference deletedAddToCartRef1 = firestore.collection("AddToPurchased");
                        DocumentReference deletedAddToCartRef2 = deletedAddToCartRef1.document(auth.getCurrentUser().getUid());
                        CollectionReference deletedAddToCartRef3 = deletedAddToCartRef2.collection("Product");
                        DocumentReference toPath = deletedAddToCartRef3.document("DiaSef1RX9xlAFm26P8M");
                        moveFirestoreDocument(fromPath, toPath);
                    }
    });

Database structure:

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Answer

Method: Move data from Firestore Database (not Realtime Database) to new collection in Android Studio

delete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                firestore.collection("AddToCart").document(auth.getCurrentUser().getUid())
                        .collection("Product")
                        .get()
                        .addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
                    @Override
                    public void onComplete(@NonNull Task<QuerySnapshot> task) {
                        if (task.isSuccessful()) {
                            QuerySnapshot tasks1 = task.getResult();

                            CollectionReference addToCartRef1 = firestore.collection("AddToCart");
                            DocumentReference addToCartRef2 = addToCartRef1.document(auth.getCurrentUser().getUid());
                            CollectionReference addToCartRef3 = addToCartRef2.collection("Product");

                            CollectionReference deletedAddToCartRef1 = firestore.collection("AddToPurchased");
                            DocumentReference deletedAddToCartRef2 = deletedAddToCartRef1.document(auth.getCurrentUser().getUid());
                            CollectionReference deletedAddToCartRef3 = deletedAddToCartRef2.collection("Product");

                            for (DocumentSnapshot doc1: tasks1.getDocuments()) {
                                DocumentReference fromPath = addToCartRef3.document(doc1.getReference().getId());
                                DocumentReference toPath = deletedAddToCartRef3.document(doc1.getReference().getId());

                                moveFirestoreDocument(fromPath, toPath);
                            }
                        }
                    }
                });
            }
        });