#pragma once
#include "classfile.h"
#include <map>
#include <vector>
namespace java
{
enum element_value_type : uint8_t
{
INVALID = 0,
STRING = 's',
ENUM_CONSTANT = 'e',
CLASS = 'c',
ANNOTATION = '@',
ARRAY = '[', // one array dimension
PRIMITIVE_INT = 'I', // integer
PRIMITIVE_BYTE = 'B', // signed byte
PRIMITIVE_CHAR = 'C', // Unicode character code point in the Basic Multilingual Plane, encoded with UTF-16
PRIMITIVE_DOUBLE = 'D', // double-precision floating-point value
PRIMITIVE_FLOAT = 'F', // single-precision floating-point value
PRIMITIVE_LONG = 'J', // long integer
PRIMITIVE_SHORT = 'S', // signed short
PRIMITIVE_BOOLEAN = 'Z' // true or false
};
/**
* The element_value structure is a discriminated union representing the value of an element-value pair.
* It is used to represent element values in all attributes that describe annotations
* - RuntimeVisibleAnnotations
* - RuntimeInvisibleAnnotations
* - RuntimeVisibleParameterAnnotations
* - RuntimeInvisibleParameterAnnotations).
*
* The element_value structure has the following format:
*/
class element_value
{
protected:
element_value_type type;
constant_pool & pool;
public:
element_value(element_value_type type, constant_pool & pool): type(type), pool(pool) {};
element_value_type getElementValueType()
{
return type;
}
virtual std::string toString() = 0;
static element_value * readElementValue(util::membuffer & input, constant_pool & pool);
};
/**
* Each value of the annotations table represents a single runtime-visible annotation on a program element.
* The annotation structure has the following format:
*/
class annotation
{
public:
typedef std::vector< std::pair<uint16_t, element_value * > > value_list;
protected:
/**
* The value of the type_index item must be a valid index into the constant_pool table.
* The constant_pool entry at that index must be a CONSTANT_Utf8_info (§4.4.7) structure
* representing a field descriptor representing the annotation type corresponding
* to the annotation represented by this annotation structure.
*/
uint16_t type_index;
/**
* map between element_name_index and value.
*
* The value of the element_name_index item must be a valid index into the constant_pool table.
* The constant_pool entry at that index must be a CONSTANT_Utf8_info (§4.4.7) structure representing
* a valid field descriptor (§4.3.2) that denotes the name of the annotation type element represented
* by this element_value_pairs entry.
*/
value_list name_val_pairs;
/**
* Reference to the parent constant pool
*/
constant_pool & pool;
public:
annotation(uint16_t type_index, constant_pool& pool):type_index(type_index), pool(pool) {};
~annotation()
{
for(unsigned i = 0 ; i < name_val_pairs.size(); i++)
{
delete name_val_pairs[i].second;
}
}
void add_pair(uint16_t key, element_value * value)
{
name_val_pairs.push_back(std::make_pair(key, value));
};
value_list::const_iterator begin()
{
return name_val_pairs.cbegin();
}
value_list::const_iterator end()
{
return name_val_pairs.cend();
}
std::string toString();
static annotation * read(util::membuffer & input, constant_pool & pool);
};
typedef std::vector<annotation *> annotation_table;
/// type for simple value annotation elements
class element_value_simple : public element_value
{
protected:
/// index of the constant in the constant pool
uint16_t index;
public:
element_value_simple(element_value_type type, uint16_t index , constant_pool& pool):
element_value(type, pool), index(index)
{
// TODO: verify consistency
};
uint16_t getIndex()
{
return index;
}
virtual std::string toString()
{
return pool[index].toString();
};
};
/// The enum_const_value item is used if the tag item is 'e'.
class element_value_enum : public element_value
{
protected:
/**
* The value of the type_name_index item must be a valid index into the constant_pool table.
* The constant_pool entry at that index must be a CONSTANT_Utf8_info (§4.4.7) structure
* representing a valid field descriptor (§4.3.2) that denotes the internal form of the binary
* name (§4.2.1) of the type of the enum constant represented by this element_value structure.
*/
uint16_t typeIndex;
/**
* The value of the const_name_index item must be a valid index into the constant_pool table.
* The constant_pool entry at that index must be a CONSTANT_Utf8_info (§4.4.7) structure
* representing the simple name of the enum constant represented by this element_value structure.
*/
uint16_t valueIndex;
public:
element_value_enum(element_value_type type, uint16_t typeIndex, uint16_t valueIndex, constant_pool& pool):
element_value(type, pool), typeIndex(typeIndex), valueIndex(valueIndex)
{
// TODO: verify consistency
}
uint16_t getValueIndex()
{
return valueIndex;
}
uint16_t getTypeIndex()
{
return typeIndex;
}
virtual std::string toString()
{
return "enum value";
};
};
class element_value_class : public element_value
{
protected:
/**
* The class_info_index item must be a valid index into the constant_pool table.
* The constant_pool entry at that index must be a CONSTANT_Utf8_info (§4.4.7) structure
* representing the return descriptor (§4.3.3) of the type that is reified by the class
* represented by this element_value structure.
*
* For example, 'V' for Void.class, 'Ljava/lang/Object;' for Object, etc.
*
* Or in plain english, you can store type information in annotations. Yay.
*/
uint16_t classIndex;
public:
element_value_class(element_value_type type, uint16_t classIndex, constant_pool& pool):
element_value(type, pool), classIndex(classIndex)
{
// TODO: verify consistency
}
uint16_t getIndex()
{
return classIndex;
}
virtual std::string toString()
{
return "class";
};
};
/// nested annotations... yay
class element_value_annotation : public element_value
{
private:
annotation * nestedAnnotation;
public:
element_value_annotation(element_value_type type, annotation * nestedAnnotation, constant_pool& pool):
element_value(type, pool), nestedAnnotation(nestedAnnotation)
{};
~element_value_annotation()
{
if(nestedAnnotation)
{
delete nestedAnnotation;
nestedAnnotation = nullptr;
}
}
virtual std::string toString()
{
return "nested annotation";
};
};
/// and arrays!
class element_value_array : public element_value
{
public:
typedef std::vector <element_value *> elem_vec;
protected:
elem_vec values;
public:
element_value_array ( element_value_type type, std::vector <element_value *>& values, constant_pool& pool ):
element_value(type, pool), values(values)
{};
~element_value_array ()
{
for(unsigned i = 0; i < values.size();i++)
{
delete values[i];
}
};
elem_vec::const_iterator begin()
{
return values.cbegin();
}
elem_vec::const_iterator end()
{
return values.cend();
}
virtual std::string toString()
{
return "array";
};
};
}