mirror of
https://github.com/Icinga/icinga2.git
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275 lines
8.6 KiB
C++
275 lines
8.6 KiB
C++
/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
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#ifndef VMOPS_H
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#define VMOPS_H
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#include "config/i2-config.hpp"
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#include "config/expression.hpp"
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#include "config/configitembuilder.hpp"
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#include "config/applyrule.hpp"
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#include "config/objectrule.hpp"
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#include "base/debuginfo.hpp"
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#include "base/array.hpp"
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#include "base/dictionary.hpp"
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#include "base/namespace.hpp"
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#include "base/function.hpp"
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#include "base/scriptglobal.hpp"
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#include "base/exception.hpp"
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#include "base/convert.hpp"
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#include "base/objectlock.hpp"
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#include <map>
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#include <vector>
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namespace icinga
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{
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class VMOps
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{
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public:
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static inline bool FindVarImportRef(ScriptFrame& frame, const std::vector<Expression::Ptr>& imports, const String& name, Value *result)
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{
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for (const auto& import : imports) {
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ExpressionResult res = import->Evaluate(frame);
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Object::Ptr obj = res.GetValue();
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if (obj->HasOwnField(name)) {
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*result = obj;
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return true;
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}
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}
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return false;
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}
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static inline bool FindVarImport(ScriptFrame& frame, const std::vector<Expression::Ptr>& imports, const String& name, Value *result, const DebugInfo& debugInfo = DebugInfo())
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{
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Value parent;
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if (FindVarImportRef(frame, imports, name, &parent)) {
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*result = GetField(parent, name, frame.Sandboxed, debugInfo);
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return true;
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}
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return false;
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}
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static inline Value ConstructorCall(const Type::Ptr& type, const std::vector<Value>& args)
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{
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if (type->GetName() == "String") {
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if (args.empty())
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return "";
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else if (args.size() == 1)
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return Convert::ToString(args[0]);
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else
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BOOST_THROW_EXCEPTION(ScriptError("Too many arguments for constructor."));
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} else if (type->GetName() == "Number") {
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if (args.empty())
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return 0;
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else if (args.size() == 1)
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return Convert::ToDouble(args[0]);
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else
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BOOST_THROW_EXCEPTION(ScriptError("Too many arguments for constructor."));
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} else if (type->GetName() == "Boolean") {
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if (args.empty())
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return 0;
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else if (args.size() == 1)
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return Convert::ToBool(args[0]);
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else
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BOOST_THROW_EXCEPTION(ScriptError("Too many arguments for constructor."));
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} else if (args.size() == 1 && type->IsAssignableFrom(args[0].GetReflectionType()))
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return args[0];
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else
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return type->Instantiate(args);
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}
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static inline Value FunctionCall(const Value& self, const Function::Ptr& func, const std::vector<Value>& arguments)
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{
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if (!self.IsEmpty() || self.IsString())
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return func->InvokeThis(self, arguments);
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else
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return func->Invoke(arguments);
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}
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static inline Value NewFunction(ScriptFrame& frame, const String& name, const std::vector<String>& argNames,
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const std::map<String, std::unique_ptr<Expression> >& closedVars, const Expression::Ptr& expression)
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{
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auto evaluatedClosedVars = EvaluateClosedVars(frame, closedVars);
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auto wrapper = [argNames, evaluatedClosedVars, expression](const std::vector<Value>& arguments) -> Value {
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if (arguments.size() < argNames.size())
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BOOST_THROW_EXCEPTION(std::invalid_argument("Too few arguments for function"));
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ScriptFrame *frame = ScriptFrame::GetCurrentFrame();
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frame->Locals = new Dictionary();
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if (evaluatedClosedVars)
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evaluatedClosedVars->CopyTo(frame->Locals);
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for (std::vector<Value>::size_type i = 0; i < std::min(arguments.size(), argNames.size()); i++)
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frame->Locals->Set(argNames[i], arguments[i]);
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return expression->Evaluate(*frame);
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};
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return new Function(name, wrapper, argNames);
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}
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static inline Value NewApply(ScriptFrame& frame, const String& type, const String& target, const String& name, const Expression::Ptr& filter,
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const String& package, const String& fkvar, const String& fvvar, const Expression::Ptr& fterm, const std::map<String, std::unique_ptr<Expression> >& closedVars,
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bool ignoreOnError, const Expression::Ptr& expression, const DebugInfo& debugInfo = DebugInfo())
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{
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ApplyRule::AddRule(type, target, name, expression, filter, package, fkvar,
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fvvar, fterm, ignoreOnError, debugInfo, EvaluateClosedVars(frame, closedVars));
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return Empty;
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}
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static inline Value NewObject(ScriptFrame& frame, bool abstract, const Type::Ptr& type, const String& name, const Expression::Ptr& filter,
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const String& zone, const String& package, bool defaultTmpl, bool ignoreOnError, const std::map<String, std::unique_ptr<Expression> >& closedVars, const Expression::Ptr& expression, const DebugInfo& debugInfo = DebugInfo())
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{
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ConfigItemBuilder item{debugInfo};
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String checkName = name;
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if (!abstract) {
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auto *nc = dynamic_cast<NameComposer *>(type.get());
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if (nc)
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checkName = nc->MakeName(name, nullptr);
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}
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if (!checkName.IsEmpty()) {
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ConfigItem::Ptr oldItem = ConfigItem::GetByTypeAndName(type, checkName);
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if (oldItem) {
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std::ostringstream msgbuf;
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msgbuf << "Object '" << name << "' of type '" << type->GetName() << "' re-defined: " << debugInfo << "; previous definition: " << oldItem->GetDebugInfo();
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BOOST_THROW_EXCEPTION(ScriptError(msgbuf.str(), debugInfo));
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}
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}
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if (filter && !ObjectRule::IsValidSourceType(type->GetName())) {
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std::ostringstream msgbuf;
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msgbuf << "Object '" << name << "' of type '" << type->GetName() << "' must not have 'assign where' and 'ignore where' rules: " << debugInfo;
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BOOST_THROW_EXCEPTION(ScriptError(msgbuf.str(), debugInfo));
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}
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item.SetType(type);
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item.SetName(name);
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if (!abstract)
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item.AddExpression(new ImportDefaultTemplatesExpression());
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item.AddExpression(new OwnedExpression(expression));
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item.SetAbstract(abstract);
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item.SetScope(EvaluateClosedVars(frame, closedVars));
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item.SetZone(zone);
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item.SetPackage(package);
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item.SetFilter(filter);
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item.SetDefaultTemplate(defaultTmpl);
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item.SetIgnoreOnError(ignoreOnError);
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item.Compile()->Register();
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return Empty;
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}
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static inline ExpressionResult For(ScriptFrame& frame, const String& fkvar, const String& fvvar, const Value& value, const std::unique_ptr<Expression>& expression, const DebugInfo& debugInfo = DebugInfo())
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{
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if (value.IsObjectType<Array>()) {
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if (!fvvar.IsEmpty())
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BOOST_THROW_EXCEPTION(ScriptError("Cannot use dictionary iterator for array.", debugInfo));
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Array::Ptr arr = value;
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for (Array::SizeType i = 0; i < arr->GetLength(); i++) {
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frame.Locals->Set(fkvar, arr->Get(i));
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ExpressionResult res = expression->Evaluate(frame);
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CHECK_RESULT_LOOP(res);
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}
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} else if (value.IsObjectType<Dictionary>()) {
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if (fvvar.IsEmpty())
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BOOST_THROW_EXCEPTION(ScriptError("Cannot use array iterator for dictionary.", debugInfo));
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Dictionary::Ptr dict = value;
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std::vector<String> keys;
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{
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ObjectLock olock(dict);
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for (const Dictionary::Pair& kv : dict) {
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keys.push_back(kv.first);
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}
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}
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for (const String& key : keys) {
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frame.Locals->Set(fkvar, key);
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frame.Locals->Set(fvvar, dict->Get(key));
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ExpressionResult res = expression->Evaluate(frame);
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CHECK_RESULT_LOOP(res);
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}
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} else if (value.IsObjectType<Namespace>()) {
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if (fvvar.IsEmpty())
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BOOST_THROW_EXCEPTION(ScriptError("Cannot use array iterator for namespace.", debugInfo));
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Namespace::Ptr ns = value;
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std::vector<String> keys;
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{
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ObjectLock olock(ns);
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for (const Namespace::Pair& kv : ns) {
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keys.push_back(kv.first);
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}
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}
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for (const String& key : keys) {
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frame.Locals->Set(fkvar, key);
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frame.Locals->Set(fvvar, ns->Get(key));
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ExpressionResult res = expression->Evaluate(frame);
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CHECK_RESULT_LOOP(res);
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}
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} else
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BOOST_THROW_EXCEPTION(ScriptError("Invalid type in for expression: " + value.GetTypeName(), debugInfo));
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return Empty;
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}
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static inline Value GetField(const Value& context, const String& field, bool sandboxed = false, const DebugInfo& debugInfo = DebugInfo())
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{
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if (BOOST_UNLIKELY(context.IsEmpty() && !context.IsString()))
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return Empty;
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if (BOOST_UNLIKELY(!context.IsObject()))
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return GetPrototypeField(context, field, true, debugInfo);
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Object::Ptr object = context;
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return object->GetFieldByName(field, sandboxed, debugInfo);
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}
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static inline void SetField(const Object::Ptr& context, const String& field, const Value& value, const DebugInfo& debugInfo = DebugInfo())
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{
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if (!context)
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BOOST_THROW_EXCEPTION(ScriptError("Cannot set field '" + field + "' on a value that is not an object.", debugInfo));
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return context->SetFieldByName(field, value, debugInfo);
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}
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private:
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static inline Dictionary::Ptr EvaluateClosedVars(ScriptFrame& frame, const std::map<String, std::unique_ptr<Expression> >& closedVars)
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{
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if (closedVars.empty())
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return nullptr;
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DictionaryData locals;
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for (const auto& cvar : closedVars)
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locals.emplace_back(cvar.first, cvar.second->Evaluate(frame));
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return new Dictionary(std::move(locals));
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}
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};
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}
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#endif /* VMOPS_H */
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