Golang bson.Unmarshal函數代碼示例

func (s *S) TestUnmarshalAllItemsWithPtrSetter(c *C) {
	for _, item := range allItems {
		for i := 0; i != 2; i++ {
			var field *setterType
			if i == 0 {
				obj := &ptrSetterDoc{}
				err := bson.Unmarshal([]byte(wrapInDoc(item.data)), obj)
				c.Assert(err, IsNil)
				field = obj.Field
			} else {
				obj := &valSetterDoc{}
				err := bson.Unmarshal([]byte(wrapInDoc(item.data)), obj)
				c.Assert(err, IsNil)
				field = &obj.Field
			}
			if item.data == "" {
				// Nothing to unmarshal. Should be untouched.
				if i == 0 {
					c.Assert(field, IsNil)
				} else {
					c.Assert(field.received, IsNil)
				}
			} else {
				expected := item.obj.(bson.M)["_"]
				c.Assert(field, NotNil, Commentf("Pointer not initialized (%#v)", expected))
				c.Assert(field.received, DeepEquals, expected)
			}
		}
	}
}

func (s *S) TestUnmarshalMapDocumentTooShort(c *C) {
	for _, data := range corruptedData {
		err := bson.Unmarshal([]byte(data), bson.M{})
		c.Assert(err, ErrorMatches, "Document is corrupted")

		err = bson.Unmarshal([]byte(data), &struct{}{})
		c.Assert(err, ErrorMatches, "Document is corrupted")
	}
}

func (socket *mongoSocket) loginRun(db string, query, result interface{}, f func() error) error {
	var mutex sync.Mutex
	var replyErr error
	mutex.Lock()

	op := queryOp{}
	op.query = query
	op.collection = db + ".$cmd"
	op.limit = -1
	op.replyFunc = func(err error, reply *replyOp, docNum int, docData []byte) {
		defer mutex.Unlock()

		if err != nil {
			replyErr = err
			return
		}

		err = bson.Unmarshal(docData, result)
		if err != nil {
			replyErr = err
		} else {
			// Must handle this within the read loop for the socket, so
			// that concurrent login requests are properly ordered.
			replyErr = f()
		}
	}

	err := socket.Query(&op)
	if err != nil {
		return err
	}
	mutex.Lock() // Wait.
	return replyErr
}

func (s *S) TestUnmarshalAllItems(c *C) {
	for i, item := range allItems {
		value := bson.M{}
		err := bson.Unmarshal([]byte(wrapInDoc(item.data)), value)
		c.Assert(err, IsNil)
		c.Assert(value, DeepEquals, item.obj, Commentf("Failed on item %d: %#v", i, item))
	}
}

// GetMeta unmarshals the optional "metadata" field associated with the
// file into the result parameter. The meaning of keys under that field
// is user-defined. For example:
//
//     result := struct{ INode int }{}
//     err = file.GetMeta(&result)
//     if err != nil {
//         panic(err.String())
//     }
//     fmt.Printf("inode: %d\n", result.INode)
//
func (file *GridFile) GetMeta(result interface{}) (err error) {
	file.m.Lock()
	if file.doc.Metadata != nil {
		err = bson.Unmarshal(file.doc.Metadata.Data, result)
	}
	file.m.Unlock()
	return
}

func (s *S) TestUnmarshalZeroesMap(c *C) {
	data, err := bson.Marshal(bson.M{"b": 2})
	c.Assert(err, IsNil)
	m := bson.M{"a": 1}
	err = bson.Unmarshal(data, &m)
	c.Assert(err, IsNil)
	c.Assert(m, DeepEquals, bson.M{"b": 2})
}

func (s *S) TestUnmarshalNilInStruct(c *C) {
	// Nil is the default value, so we need to ensure it's indeed being set.
	b := byte(1)
	v := &struct{ Ptr *byte }{&b}
	err := bson.Unmarshal([]byte(wrapInDoc("\x0Aptr\x00")), v)
	c.Assert(err, IsNil)
	c.Assert(v, DeepEquals, &struct{ Ptr *byte }{nil})
}

func (s *S) TestUnmarshalSampleItems(c *C) {
	for i, item := range sampleItems {
		value := bson.M{}
		err := bson.Unmarshal([]byte(item.data), value)
		c.Assert(err, IsNil)
		c.Assert(value, DeepEquals, item.obj, Commentf("Failed on item %d", i))
	}
}

func (s *S) TestMarshalWithGetterNil(c *C) {
	obj := docWithGetterField{}
	data, err := bson.Marshal(obj)
	c.Assert(err, IsNil)
	m := bson.M{}
	err = bson.Unmarshal(data, m)
	c.Assert(err, IsNil)
	c.Assert(m, DeepEquals, bson.M{"_": "<value is nil>"})
}

func (s *S) TestMarshalShortWithGetter(c *C) {
	obj := typeWithIntGetter{42}
	data, err := bson.Marshal(obj)
	c.Assert(err, IsNil)
	m := bson.M{}
	err = bson.Unmarshal(data, m)
	c.Assert(err, IsNil)
	c.Assert(m["v"], Equals, 42)
}

func (s *S) TestUnmarshalZeroesStruct(c *C) {
	data, err := bson.Marshal(bson.M{"b": 2})
	c.Assert(err, IsNil)
	type T struct{ A, B int }
	v := T{A: 1}
	err = bson.Unmarshal(data, &v)
	c.Assert(err, IsNil)
	c.Assert(v.A, Equals, 0)
	c.Assert(v.B, Equals, 2)
}

func objToDoc(obj interface{}) (d bson.D, err error) {
	data, err := bson.Marshal(obj)
	if err != nil {
		return nil, err
	}
	err = bson.Unmarshal(data, &d)
	if err != nil {
		return nil, err
	}
	return d, err
}

func (s *S) TestUnmarshalNonNilInterface(c *C) {
	data, err := bson.Marshal(bson.M{"b": 2})
	c.Assert(err, IsNil)
	m := bson.M{"a": 1}
	var i interface{}
	i = m
	err = bson.Unmarshal(data, &i)
	c.Assert(err, IsNil)
	c.Assert(i, DeepEquals, bson.M{"b": 2})
	c.Assert(m, DeepEquals, bson.M{"a": 1})
}

func testCrossPair(c *C, dump interface{}, load interface{}) {
	c.Logf("Dump: %#v", dump)
	c.Logf("Load: %#v", load)
	zero := makeZeroDoc(load)
	data, err := bson.Marshal(dump)
	c.Assert(err, IsNil)
	c.Logf("Dumped: %#v", string(data))
	err = bson.Unmarshal(data, zero)
	c.Assert(err, IsNil)
	c.Logf("Loaded: %#v", zero)
	c.Assert(zero, DeepEquals, load)
}

func (s *S) Test64bitInt(c *C) {
	var i int64 = (1 << 31)
	if int(i) > 0 {
		data, err := bson.Marshal(bson.M{"i": int(i)})
		c.Assert(err, IsNil)
		c.Assert(string(data), Equals, wrapInDoc("\x12i\x00\x00\x00\x00\x80\x00\x00\x00\x00"))

		var result struct{ I int }
		err = bson.Unmarshal(data, &result)
		c.Assert(err, IsNil)
		c.Assert(int64(result.I), Equals, i)
	}
}