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App: circular reference testing routine for new links

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DocumentObject::testIfLinkDAGCompatible: return true if link can be
created (no cycles will be made). False if the link will cause a
circular dependency and break recomputes.
This commit is contained in:
DeepSOIC
2015-07-08 21:36:39 +03:00
committed by Stefan Tröger
parent a8781fdacc
commit 565a191689
3 changed files with 56 additions and 2 deletions
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16
src/App/DocumentObject.h
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@@ -26,6 +26,7 @@
#include <App/PropertyContainer.h>
#include <App/PropertyStandard.h>
#include <App/PropertyLinks.h>
#include <App/PropertyExpressionEngine.h>
#include <Base/TimeInfo.h>
@@ -132,6 +133,21 @@ public:
/// get group if object is part of a group, otherwise 0 is returned
DocumentObjectGroup* getGroup() const;
/**
* @brief testIfLinkIsDAG tests a link that is about to be created for
* circular references.
* @param objToLinkIn (input). The object this object is to depend on after
* the link is going to be created.
* @return true if link can be created (no cycles will be made). False if
* the link will cause a circular dependency and break recomputes. Throws an
* error if the document already has a circular dependency.
* That is, if the return is true, the link is allowed.
*/
bool testIfLinkDAGCompatible(DocumentObject* linkTo) const;
bool testIfLinkDAGCompatible(const std::vector<DocumentObject *> &linksTo) const;
bool testIfLinkDAGCompatible(App::PropertyLinkSubList &linksTo) const;
bool testIfLinkDAGCompatible(App::PropertyLinkSub &linkTo) const;
public:
/** mustExecute