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#ifndef DYNAMIC_DEPTH_INTERNAL_XMPMETA_XML_DESERIALIZER_IMPL_H_ // NOLINT
#define DYNAMIC_DEPTH_INTERNAL_XMPMETA_XML_DESERIALIZER_IMPL_H_ // NOLINT
#include <libxml/tree.h>
#include <map>
#include <mutex> // NOLINT(build/c++11)
#include <string>
#include "base/port.h"
#include "xmpmeta/xml/deserializer.h"
namespace photos_editing_formats {
namespace xml {
// Deserializes an XML node.
// Example:
// xmlNodePtr device_node =
// DepthFirstSearch(xmp.ExtendedSection(), "Device", "Description");
// DeserializerImpl deserializer(device_node);
// string revision;
// deserializer.ParseString("Device", "Revision", &revision);
// TODO(miraleung): Add example for list node deserializer.
class DeserializerImpl : public Deserializer {
public:
// Creates a deserializer with a null rdf:Seq node.
explicit DeserializerImpl(const xmlNodePtr node);
// Returns a Deserializer.
// If prefix is empty, the deserializer will be created on the first node
// found with a name that matches child_name.
// child_name is the name of the next node to deserialize.
std::unique_ptr<Deserializer> CreateDeserializer(
const string& prefix, const string& child_name) const override;
// Returns a Deserializer from a list element node, if one is available as
// a descendant of node_.
// If prefix is empty, the deserializer will be created on the first node
// found with a name that matches child_name.
// Returns null if seq_node_ is null or if the index is out of range.
std::unique_ptr<Deserializer> CreateDeserializerFromListElementAt(
const string& prefix, const string& list_name, int index) const override;
// Parsers for XML properties.
// If prefix is empty, the node's namespace may be null. Otherwise, it must
// not be null.
bool ParseBase64(const string& prefix, const string& name,
string* value) const override;
bool ParseIntArrayBase64(const string& prefix, const string& name,
std::vector<int>* values) const override;
bool ParseFloatArrayBase64(const string& prefix, const string& name,
std::vector<float>* values) const override;
bool ParseDoubleArrayBase64(const string& prefix, const string& name,
std::vector<double>* values) const override;
bool ParseBoolean(const string& prefix, const string& name,
bool* value) const override;
bool ParseDouble(const string& prefix, const string& name,
double* value) const override;
bool ParseInt(const string& prefix, const string& name,
int* value) const override;
bool ParseFloat(const string& prefix, const string& name,
float* value) const override;
bool ParseLong(const string& prefix, const string& name,
int64* value) const override;
bool ParseString(const string& prefix, const string& name,
string* value) const override;
// Parses the numbers in an rdf:Seq list into the values collection.
// The given collection is cleared of any existing values, and the
// parsed numbers are written to it.
bool ParseIntArray(const string& prefix, const string& list_name,
std::vector<int>* values) const override;
bool ParseDoubleArray(const string& prefix, const string& list_name,
std::vector<double>* values) const override;
// Disallow copying.
DeserializerImpl(const DeserializerImpl&) = delete;
void operator=(const DeserializerImpl&) = delete;
private:
xmlNodePtr node_;
// Remembers the parent node of the last deserializer created on the rdf:Seq
// node. For performance reasons only, to avoid unnessarily traversing
// the XML document tree.
mutable xmlNodePtr list_node_;
// Lock modifications of list_node_ in const functions to make it thread-safe.
mutable std::mutex mtx_;
};
} // namespace xml
} // namespace photos_editing_formats
#endif // DYNAMIC_DEPTH_INTERNAL_XMPMETA_XML_DESERIALIZER_IMPL_H_ // NOLINT
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