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55 lines
1.1 KiB
C++
55 lines
1.1 KiB
C++
#pragma once
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#include <iostream>
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#include "ifaces/INode.h"
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#include "ifaces/ILinkMixin.h"
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#include "links/LeafLink.h"
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#include "links/OneToManyLink.h"
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#include <memory>
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template <class TLink>
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class LazyLinkMixin : public virtual ILinkMixin {
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public:
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void linkChild(const NodePtr& childNode) override {
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LinkPtr childLink = childNode->getLink();
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childLink->setParent(getNode());
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getLink()->addChild(childNode);
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}
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void unlinkParent() override {
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/* No link -- no parent, who'll unlinked? */
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if (!link_)
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throw std::logic_error("Link isn't inited!");
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NodePtr parent = link_->getParent();
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if (!parent)
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throw std::logic_error("Have no parent!");
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LinkPtr parentLink = parent->getLink();
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parentLink->removeChild(getNode());
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getLink()->setParent(nullptr);
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}
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LinkPtr getLink() override {
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lazyInit();
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return link_;
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}
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~LazyLinkMixin() override {
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std::cout << "--- Destructor called for: " << "LazyLinkMixin" << "\n";
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}
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protected:
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virtual NodePtr getNode() = 0;
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private:
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void lazyInit() {
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if (!link_) {
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link_ = std::make_shared<TLink>(getNode());
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}
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}
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LinkPtr link_;
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};
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