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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
#ifndef T_STRUCT_H
#define T_STRUCT_H
#include <algorithm>
#include <vector>
#include <utility>
#include <string>
#include "thrift/parse/t_type.h"
#include "thrift/parse/t_field.h"
// Forward declare that puppy
class t_program;
/**
* A struct is a container for a set of member fields that has a name. Structs
* are also used to implement exception types.
*
*/
class t_struct : public t_type {
public:
typedef std::vector<t_field*> members_type;
t_struct(t_program* program)
: t_type(program),
is_xception_(false),
is_union_(false),
members_validated(false),
members_with_value(0),
xsd_all_(false) {}
t_struct(t_program* program, const std::string& name)
: t_type(program, name),
is_xception_(false),
is_union_(false),
members_validated(false),
members_with_value(0),
xsd_all_(false) {}
void set_name(const std::string& name) override {
name_ = name;
validate_union_members();
}
void set_xception(bool is_xception) { is_xception_ = is_xception; }
void validate_union_member(t_field* field) {
if (is_union_ && (!name_.empty())) {
// 1) unions can't have required fields
// 2) union members are implicitly optional, otherwise bugs like THRIFT-3650 wait to happen
if (field->get_req() != t_field::T_OPTIONAL) {
// no warning on default requiredness, but do warn on anything else that is explicitly asked for
if(field->get_req() != t_field::T_OPT_IN_REQ_OUT) {
pwarning(1,
"Union %s field %s: union members must be optional, ignoring specified requiredness.\n",
name_.c_str(),
field->get_name().c_str());
}
field->set_req(t_field::T_OPTIONAL);
}
// unions may have up to one member defaulted, but not more
if (field->get_value() != nullptr) {
if (1 < ++members_with_value) {
throw "Error: Field " + field->get_name() + " provides another default value for union "
+ name_;
}
}
}
}
void validate_union_members() {
if (is_union_ && (!name_.empty()) && (!members_validated)) {
members_type::const_iterator m_iter;
for (m_iter = members_in_id_order_.begin(); m_iter != members_in_id_order_.end(); ++m_iter) {
validate_union_member(*m_iter);
}
members_validated = true;
}
}
void set_union(bool is_union) {
is_union_ = is_union;
validate_union_members();
}
void set_xsd_all(bool xsd_all) { xsd_all_ = xsd_all; }
bool get_xsd_all() const { return xsd_all_; }
bool append(t_field* elem) {
typedef members_type::iterator iter_type;
std::pair<iter_type, iter_type> bounds = std::equal_range(members_in_id_order_.begin(),
members_in_id_order_.end(),
elem,
t_field::key_compare());
if (bounds.first != bounds.second) {
return false;
}
// returns false when there is a conflict of field names
if (get_field_by_name(elem->get_name()) != nullptr) {
return false;
}
members_.push_back(elem);
members_in_id_order_.insert(bounds.second, elem);
validate_union_member(elem);
return true;
}
const members_type& get_members() const { return members_; }
const members_type& get_sorted_members() const { return members_in_id_order_; }
bool is_struct() const override { return !is_xception_; }
bool is_xception() const override { return is_xception_; }
bool is_union() const { return is_union_; }
t_field* get_field_by_name(std::string field_name) {
return const_cast<t_field*>(const_cast<const t_struct&>(*this).get_field_by_name(field_name));
}
const t_field* get_field_by_name(std::string field_name) const {
members_type::const_iterator m_iter;
for (m_iter = members_in_id_order_.begin(); m_iter != members_in_id_order_.end(); ++m_iter) {
if ((*m_iter)->get_name() == field_name) {
return *m_iter;
}
}
return nullptr;
}
private:
members_type members_;
members_type members_in_id_order_;
bool is_xception_;
bool is_union_;
bool members_validated;
int members_with_value;
bool xsd_all_;
};
#endif
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