GODRIVER-2835 Change the bson.ValueReader input to an io.Reader.

mongodb · Jun 12, 2024 · 772efb4 · 772efb4
1 parent 269ba66
commit 772efb4
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Showing 13 changed files with 307 additions and 177 deletions.
diff --git a/bson/copier.go b/bson/copier.go
@@ -7,6 +7,7 @@
 package bson
 
 import (
+	"bytes"
 	"errors"
 	"fmt"
 	"io"
@@ -205,10 +206,7 @@ func copyValueFromBytes(dst ValueWriter, t Type, src []byte) error {
 		return wvb.WriteValueBytes(t, src)
 	}
 
-	vr := vrPool.Get().(*valueReader)
-	defer vrPool.Put(vr)
-
-	vr.reset(src)
+	vr := newValueReader(bytes.NewReader(src))
 	vr.pushElement(t)
 
 	return copyValue(dst, vr)

diff --git a/bson/copier_test.go b/bson/copier_test.go
@@ -40,7 +40,7 @@ func TestCopier(t *testing.T) {
 			doc = bsoncore.AppendStringElement(doc, "Hello", "world")
 			doc, err := bsoncore.AppendDocumentEnd(doc, idx)
 			noerr(t, err)
-			src := newValueReader(doc)
+			src := newValueReader(bytes.NewReader(doc))
 			dst := newValueWriterFromSlice(make([]byte, 0))
 			want := doc
 			err = copyDocument(dst, src)
@@ -77,7 +77,7 @@ func TestCopier(t *testing.T) {
 			noerr(t, err)
 			doc, err = bsoncore.AppendDocumentEnd(doc, idx)
 			noerr(t, err)
-			src := newValueReader(doc)
+			src := newValueReader(bytes.NewReader(doc))
 
 			_, err = src.ReadDocument()
 			noerr(t, err)
@@ -450,7 +450,7 @@ func TestCopier(t *testing.T) {
 				idx,
 			)
 			noerr(t, err)
-			vr := newValueReader(b)
+			vr := newValueReader(bytes.NewReader(b))
 			_, err = vr.ReadDocument()
 			noerr(t, err)
 			_, _, err = vr.ReadElement()
@@ -489,7 +489,7 @@ func TestCopier(t *testing.T) {
 				idx,
 			)
 			noerr(t, err)
-			vr := newValueReader(b)
+			vr := newValueReader(bytes.NewReader(b))
 			_, err = vr.ReadDocument()
 			noerr(t, err)
 			_, _, err = vr.ReadElement()

diff --git a/bson/decoder_example_test.go b/bson/decoder_example_test.go
@@ -30,7 +30,7 @@ func ExampleDecoder() {
 
 	// Create a Decoder that reads the marshaled BSON document and use it to
 	// unmarshal the document into a Product struct.
-	decoder := bson.NewDecoder(bson.NewValueReader(data))
+	decoder := bson.NewDecoder(bson.NewValueReader(bytes.NewReader(data)))
 
 	type Product struct {
 		Name  string `bson:"name"`
@@ -66,7 +66,7 @@ func ExampleDecoder_DefaultDocumentM() {
 
 	// Create a Decoder that reads the marshaled BSON document and use it to unmarshal the document
 	// into a City struct.
-	decoder := bson.NewDecoder(bson.NewValueReader(data))
+	decoder := bson.NewDecoder(bson.NewValueReader(bytes.NewReader(data)))
 
 	type City struct {
 		Name       string      `bson:"name"`
@@ -104,7 +104,7 @@ func ExampleDecoder_UseJSONStructTags() {
 
 	// Create a Decoder that reads the marshaled BSON document and use it to
 	// unmarshal the document into a Product struct.
-	decoder := bson.NewDecoder(bson.NewValueReader(data))
+	decoder := bson.NewDecoder(bson.NewValueReader(bytes.NewReader(data)))
 
 	type Product struct {
 		Name  string `json:"name"`

diff --git a/bson/decoder_test.go b/bson/decoder_test.go
@@ -28,7 +28,7 @@ func TestBasicDecode(t *testing.T) {
 			t.Parallel()
 
 			got := reflect.New(tc.sType).Elem()
-			vr := NewValueReader(tc.data)
+			vr := NewValueReader(bytes.NewReader(tc.data))
 			reg := DefaultRegistry
 			decoder, err := reg.LookupDecoder(reflect.TypeOf(got))
 			noerr(t, err)
@@ -184,7 +184,7 @@ func TestDecodingInterfaces(t *testing.T) {
 
 			data, receiver, check := tc.stub()
 			got := reflect.ValueOf(receiver).Elem()
-			vr := NewValueReader(data)
+			vr := NewValueReader(bytes.NewReader(data))
 			reg := DefaultRegistry
 			decoder, err := reg.LookupDecoder(got.Type())
 			noerr(t, err)
@@ -208,7 +208,7 @@ func TestDecoderv2(t *testing.T) {
 				t.Parallel()
 
 				got := reflect.New(tc.sType).Interface()
-				vr := NewValueReader(tc.data)
+				vr := NewValueReader(bytes.NewReader(tc.data))
 				dec := NewDecoder(vr)
 				err := dec.Decode(got)
 				noerr(t, err)
@@ -223,7 +223,7 @@ func TestDecoderv2(t *testing.T) {
 			_ = certainlydoesntexistelsewhereihope(func(string, string) string { return "" })
 
 			cdeih := func(string, string) string { return "certainlydoesntexistelsewhereihope" }
-			dec := NewDecoder(NewValueReader([]byte{}))
+			dec := NewDecoder(NewValueReader(bytes.NewReader([]byte{})))
 			want := ErrNoDecoder{Type: reflect.TypeOf(cdeih)}
 			got := dec.Decode(&cdeih)
 			assert.Equal(t, want, got, "Received unexpected error.")
@@ -285,7 +285,7 @@ func TestDecoderv2(t *testing.T) {
 
 				want := bsoncore.BuildDocument(nil, bsoncore.AppendDoubleElement(nil, "pi", 3.14159))
 				unmarshaler := &testUnmarshaler{}
-				vr := NewValueReader(want)
+				vr := NewValueReader(bytes.NewReader(want))
 				dec := NewDecoder(vr)
 				err := dec.Decode(unmarshaler)
 				noerr(t, err)
@@ -302,7 +302,7 @@ func TestDecoderv2(t *testing.T) {
 		t.Run("success", func(t *testing.T) {
 			t.Parallel()
 
-			got := NewDecoder(NewValueReader([]byte{}))
+			got := NewDecoder(NewValueReader(bytes.NewReader([]byte{})))
 			if got == nil {
 				t.Errorf("Was expecting a non-nil Decoder, but got <nil>")
 			}
@@ -314,7 +314,7 @@ func TestDecoderv2(t *testing.T) {
 		t.Run("success", func(t *testing.T) {
 			t.Parallel()
 
-			got := NewDecoder(NewValueReader([]byte{}))
+			got := NewDecoder(NewValueReader(bytes.NewReader([]byte{})))
 			if got == nil {
 				t.Errorf("Was expecting a non-nil Decoder, but got <nil>")
 			}
@@ -332,7 +332,7 @@ func TestDecoderv2(t *testing.T) {
 		got.Item = "apple"
 		got.Bonus = 2
 		data := docToBytes(D{{"item", "canvas"}, {"qty", 4}})
-		vr := NewValueReader(data)
+		vr := NewValueReader(bytes.NewReader(data))
 		dec := NewDecoder(vr)
 		err := dec.Decode(&got)
 		noerr(t, err)
@@ -342,7 +342,7 @@ func TestDecoderv2(t *testing.T) {
 	t.Run("Reset", func(t *testing.T) {
 		t.Parallel()
 
-		vr1, vr2 := NewValueReader([]byte{}), NewValueReader([]byte{})
+		vr1, vr2 := NewValueReader(bytes.NewReader([]byte{})), NewValueReader(bytes.NewReader([]byte{}))
 		dec := NewDecoder(vr1)
 		if dec.vr != vr1 {
 			t.Errorf("Decoder should use the value reader provided. got %v; want %v", dec.vr, vr1)
@@ -358,7 +358,7 @@ func TestDecoderv2(t *testing.T) {
 		r1, r2 := DefaultRegistry, NewRegistry()
 		dc1 := DecodeContext{Registry: r1}
 		dc2 := DecodeContext{Registry: r2}
-		dec := NewDecoder(NewValueReader([]byte{}))
+		dec := NewDecoder(NewValueReader(bytes.NewReader([]byte{})))
 		if !reflect.DeepEqual(dec.dc, dc1) {
 			t.Errorf("Decoder should use the Registry provided. got %v; want %v", dec.dc, dc1)
 		}
@@ -371,7 +371,7 @@ func TestDecoderv2(t *testing.T) {
 		t.Parallel()
 
 		data := docToBytes(D{{"item", "canvas"}, {"qty", 4}})
-		vr := NewValueReader(data)
+		vr := NewValueReader(bytes.NewReader(data))
 		dec := NewDecoder(vr)
 
 		var got *D
@@ -578,7 +578,7 @@ func TestDecoderConfiguration(t *testing.T) {
 		t.Run(tc.description, func(t *testing.T) {
 			t.Parallel()
 
-			dec := NewDecoder(NewValueReader(tc.input))
+			dec := NewDecoder(NewValueReader(bytes.NewReader(tc.input)))
 
 			tc.configure(dec)
 
@@ -599,7 +599,7 @@ func TestDecoderConfiguration(t *testing.T) {
 				Build()).
 			Build()
 
-		dec := NewDecoder(NewValueReader(input))
+		dec := NewDecoder(NewValueReader(bytes.NewReader(input)))
 
 		dec.DefaultDocumentM()
 
@@ -623,7 +623,7 @@ func TestDecoderConfiguration(t *testing.T) {
 				Build()).
 			Build()
 
-		dec := NewDecoder(NewValueReader(input))
+		dec := NewDecoder(NewValueReader(bytes.NewReader(input)))
 
 		dec.DefaultDocumentD()
 

diff --git a/bson/default_value_decoders_test.go b/bson/default_value_decoders_test.go
@@ -7,6 +7,7 @@
 package bson
 
 import (
+	"bytes"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -2428,7 +2429,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 				buildDocument(bsoncore.AppendNullElement(nil, "bar")),
 			),
 		)
-		dvr := NewValueReader(b)
+		dvr := NewValueReader(bytes.NewReader(b))
 		dr, err := dvr.ReadDocument()
 		noerr(t, err)
 		_, vr, err := dr.ReadElement()
@@ -2481,7 +2482,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 		noerr(t, err)
 		doc, err = bsoncore.AppendDocumentEnd(doc, idx)
 		noerr(t, err)
-		dvr := NewValueReader(doc)
+		dvr := NewValueReader(bytes.NewReader(doc))
 		noerr(t, err)
 		dr, err := dvr.ReadDocument()
 		noerr(t, err)
@@ -3132,7 +3133,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 
 			for _, tc := range testCases {
 				t.Run(tc.name, func(t *testing.T) {
-					vr := NewValueReader(tc.b)
+					vr := NewValueReader(bytes.NewReader(tc.b))
 					reg := buildDefaultRegistry()
 					vtype := reflect.TypeOf(tc.value)
 					dec, err := reg.LookupDecoder(vtype)
@@ -3181,7 +3182,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 
 		for _, tc := range testCases {
 			t.Run(tc.name, func(t *testing.T) {
-				vr := NewValueReader(tc.b)
+				vr := NewValueReader(bytes.NewReader(tc.b))
 				reg := buildDefaultRegistry()
 				vtype := reflect.TypeOf(tc.value)
 				dec, err := reg.LookupDecoder(vtype)
@@ -3403,7 +3404,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 		})
 		t.Run("top level document", func(t *testing.T) {
 			data := bsoncore.BuildDocument(nil, bsoncore.AppendDoubleElement(nil, "pi", 3.14159))
-			vr := NewValueReader(data)
+			vr := NewValueReader(bytes.NewReader(data))
 			want := D{{"pi", 3.14159}}
 			var got interface{}
 			val := reflect.ValueOf(&got).Elem()
@@ -3451,7 +3452,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 			}
 			for _, tc := range testCases {
 				var got interface{}
-				vr := NewValueReader(doc)
+				vr := NewValueReader(bytes.NewReader(doc))
 				val := reflect.ValueOf(&got).Elem()
 
 				err := defaultEmptyInterfaceCodec.DecodeValue(DecodeContext{Registry: tc.registry}, vr, val)
@@ -3487,7 +3488,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 			}
 
 			var got D
-			vr := NewValueReader(doc)
+			vr := NewValueReader(bytes.NewReader(doc))
 			val := reflect.ValueOf(&got).Elem()
 			err := defaultSliceCodec.DecodeValue(DecodeContext{Registry: reg}, vr, val)
 			noerr(t, err)
@@ -3577,7 +3578,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 				// DecodeValue error when decoding into a D.
 				"D slice",
 				D{},
-				NewValueReader(docBytes),
+				NewValueReader(bytes.NewReader(docBytes)),
 				emptyInterfaceErrorRegistry,
 				defaultSliceCodec,
 				docEmptyInterfaceErr,
@@ -3600,7 +3601,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 				// the decodeD helper function.
 				"D array",
 				[1]E{},
-				NewValueReader(docBytes),
+				NewValueReader(bytes.NewReader(docBytes)),
 				emptyInterfaceErrorRegistry,
 				ValueDecoderFunc(dvd.ArrayDecodeValue),
 				docEmptyInterfaceErr,
@@ -3623,7 +3624,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 				// DecodeValue error when decoding into a map.
 				"map",
 				map[string]interface{}{},
-				NewValueReader(docBytes),
+				NewValueReader(bytes.NewReader(docBytes)),
 				emptyInterfaceErrorRegistry,
 				defaultMapCodec,
 				docEmptyInterfaceErr,
@@ -3632,7 +3633,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 				// DecodeValue error when decoding into a struct.
 				"struct - DecodeValue error",
 				emptyInterfaceStruct{},
-				NewValueReader(docBytes),
+				NewValueReader(bytes.NewReader(docBytes)),
 				emptyInterfaceErrorRegistry,
 				defaultTestStructCodec,
 				emptyInterfaceStructErr,
@@ -3643,15 +3644,15 @@ func TestDefaultValueDecoders(t *testing.T) {
 				// no decoder for strings.
 				"struct - no decoder found",
 				stringStruct{},
-				NewValueReader(docBytes),
+				NewValueReader(bytes.NewReader(docBytes)),
 				newTestRegistryBuilder().Build(),
 				defaultTestStructCodec,
 				stringStructErr,
 			},
 			{
 				"deeply nested struct",
 				outer{},
-				NewValueReader(outerDoc),
+				NewValueReader(bytes.NewReader(outerDoc)),
 				nestedRegistry,
 				defaultTestStructCodec,
 				nestedErr,
@@ -3681,7 +3682,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 			type outer struct{ Foo inner }
 
 			dc := DecodeContext{Registry: buildDefaultRegistry()}
-			vr := NewValueReader(outerBytes)
+			vr := NewValueReader(bytes.NewReader(outerBytes))
 			val := reflect.New(reflect.TypeOf(outer{})).Elem()
 			err := defaultTestStructCodec.DecodeValue(dc, vr, val)
 
@@ -3714,7 +3715,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 			reg := rb.RegisterTypeMapEntry(TypeBoolean, reflect.TypeOf(mybool(true))).Build()
 
 			dc := DecodeContext{Registry: reg}
-			vr := NewValueReader(docBytes)
+			vr := NewValueReader(bytes.NewReader(docBytes))
 			val := reflect.New(tD).Elem()
 			err := defaultValueDecoders.DDecodeValue(dc, vr, val)
 			assert.Nil(t, err, "DDecodeValue error: %v", err)
@@ -3733,7 +3734,7 @@ func TestDefaultValueDecoders(t *testing.T) {
 
 			type myMap map[string]mybool
 			dc := DecodeContext{Registry: buildDefaultRegistry()}
-			vr := NewValueReader(docBytes)
+			vr := NewValueReader(bytes.NewReader(docBytes))
 			val := reflect.New(reflect.TypeOf(myMap{})).Elem()
 			err := defaultMapCodec.DecodeValue(dc, vr, val)
 			assert.Nil(t, err, "DecodeValue error: %v", err)