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JSON: Templatize the JSON serialization code

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This makes it possible to use something other than a StringBuilder for
serialization (and to produce something other than a String.) :^)
This commit is contained in:
Andreas Kling 2019-08-07 21:28:07 +02:00
parent 43ec733b61
commit f6998b1817
11 changed files with 145 additions and 109 deletions
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84
AK/JsonObject.h
View file

@ -2,13 +2,14 @@
#include <AK/AKString.h>
#include <AK/HashMap.h>
#include <AK/JsonArray.h>
#include <AK/JsonValue.h>
namespace AK {
class JsonObject {
public:
JsonObject() { }
JsonObject() {}
~JsonObject() {}
JsonObject(const JsonObject& other)
@ -63,13 +64,90 @@ public:
callback(it.key, it.value);
}
String serialized() const;
void serialize(StringBuilder&) const;
template<typename Builder>
typename Builder::OutputType serialized() const;
template<typename Builder>
void serialize(Builder&) const;
String to_string() const { return serialized<StringBuilder>(); }
private:
HashMap<String, JsonValue> m_members;
};
template<typename Builder>
inline void JsonObject::serialize(Builder& builder) const
{
int index = 0;
builder.append('{');
for_each_member([&](auto& key, auto& value) {
builder.append('"');
builder.append(key);
builder.append('"');
builder.append(':');
value.serialize(builder);
if (index != size() - 1)
builder.append(',');
++index;
});
builder.append('}');
}
template<typename Builder>
inline typename Builder::OutputType JsonObject::serialized() const
{
Builder builder;
serialize(builder);
return builder.build();
}
template<typename Builder>
void JsonValue::serialize(Builder& builder) const
{
switch (m_type) {
case Type::String:
builder.appendf("\"%s\"", m_value.as_string->characters());
break;
case Type::Array:
m_value.as_array->serialize(builder);
break;
case Type::Object:
m_value.as_object->serialize(builder);
break;
case Type::Bool:
builder.append(m_value.as_bool ? "true" : "false");
break;
#ifndef KERNEL
case Type::Double:
builder.appendf("%g", m_value.as_double);
break;
#endif
case Type::Int:
builder.appendf("%d", m_value.as_int);
break;
case Type::UnsignedInt:
builder.appendf("%u", m_value.as_uint);
break;
case Type::Undefined:
builder.append("undefined");
break;
case Type::Null:
builder.append("null");
break;
default:
ASSERT_NOT_REACHED();
}
}
template<typename Builder>
typename Builder::OutputType JsonValue::serialized() const
{
Builder builder;
serialize(builder);
return builder.build();
}
}
using AK::JsonObject;