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fbb68dbcd0
In essence, namespace behaviors acted as hooks for update operations on namespaces. Two behaviors were implemented: - `NamespaceBehavior`: allows the update operation unless it acts on a value that itself was explicitly marked as constant. - `ConstNamespaceBehavior`: initially allows insert operations but marks the individual values as const. Additionally provides a `Freeze()` member function. After this was called, updates are rejected unless a special `overrideFrozen` flag is set explicitly. This marvel of object-oriented programming can be replaced with a simple bool. This commit basically replaces `Namespace::m_Behavior` with `Namespace::m_ConstValues` and inlines the behavior functions where they were called. While doing so, the code was slightly simplified by assuming that `m_ConstValues` is true if `m_Frozen` is true. This is similar to what the API allowed in the old code as you could only freeze a `ConstNamespaceBehavior`. However, this PR moves the `Freeze()` member function and the related `m_Freeze` member variable to the `Namespace` class. So now the API allows any namespace to be frozen. The new code also makes sense with the previously mentioned simplification: a `Namespace` with `m_ConstValues = false` can be modified without restrictions until `Freeze()` is called. When this is done, it becomes read-only. The changes outside of `namespace.*` just adapt the code to the slightly changed API.
29 lines
751 B
C++
29 lines
751 B
C++
/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
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#include "base/dictionary.hpp"
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#include "base/function.hpp"
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#include "base/functionwrapper.hpp"
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#include "base/scriptframe.hpp"
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#include "base/initialize.hpp"
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#include "base/json.hpp"
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using namespace icinga;
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static String JsonEncodeShim(const Value& value)
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{
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return JsonEncode(value);
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}
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INITIALIZE_ONCE([]() {
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Namespace::Ptr jsonNS = new Namespace(true);
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/* Methods */
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jsonNS->Set("encode", new Function("Json#encode", JsonEncodeShim, { "value" }, true));
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jsonNS->Set("decode", new Function("Json#decode", JsonDecode, { "value" }, true));
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jsonNS->Freeze();
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Namespace::Ptr systemNS = ScriptGlobal::Get("System");
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systemNS->SetAttribute("Json", new ConstEmbeddedNamespaceValue(jsonNS));
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});
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