This pre-check must return Abort if the addition is to be canceled, PostCheck if postAdd is to be called to decide or Complete if the outer edge is allowed to be added. If postAdd has been implemented, this method may always return PostCheck. This pre-check may be omitted by letting it always return postCheck and overriding the corresponding post-check commit* method. Use self to access the associated graph.

This pre-check must return Abort if the addition is to be canceled, PostCheck if postAdd is to be called to decide or Complete if the outer node is allowed to be added. If postAdd has been implemented, this method may always return PostCheck. This pre-check may be omitted by letting it always return postCheck and overriding the corresponding post-check commit* method. Use self to access the associated graph.

This pre-check must return Abort if the subtraction of edge is to be canceled, PostCheck if postSubtract is to be called to decide or Complete if the the edge is allowed to be subtracted. This pre-check may be omitted by letting it always return postCheck and overriding the corresponding post-check commit* method. Use self to access the associated graph.

This pre-check must return Abort if the subtraction of node is to be canceled, PostCheck if postSubtract is to be called to decide or Complete if the the node is allowed to be subtracted. This pre-check may be omitted by letting it always return postCheck and overriding the corresponding post-check commit* method. Use self to access the associated graph.

When extending Constraint, self will denote the attached constrained graph. The factory methods of the companion object scalax.collection.constrained.Graph initialize self to the correct graph instance. When extending Constrained, self will denote this graph.

Consolidates all outer nodes of the arguments by adding the edge ends of passedEdges to passedNodes.

This post-check must return whether newGraph should be committed or the add operation is to be rolled back. Use self to access the associated graph. For immutable graphs, self maintains the state before the addition but for mutable graphs, it is already mutated to the required state.

This post-check must return whether newGraph should be committed or the subtraction is to be rolled back. Use self to access the associated graph. For immutable graphs, self maintains the state before the addition but for mutable graphs, it is already mutated to the required state.

This pre-check must return Abort if the addition of the outer nodes and/or edges in elems is to be canceled, PostCheck if postAdd is to be called to decide or Complete if the the outer nodes and/or edges are allowed to be added. If postAdd has been implemented, this method may always return PostCheck. The default implementation calls preAdd(node)/preAdd(edge) element-wise. As for most cases this won't be satisfactory a domain-specific implementation should be provided. Use self to access the associated graph.

This pre-check is called on constructing a graph through its companion object. It must return whether the graph is allowed to be populated with nodes and edges. The default implementation calls preAdd for each node and edge.

Note that nodes and edges coming from node/edge input streams are not checked. So when utilizing streams the post check postAdd must be served.

This pre-check must return Abort if the subtraction of nodes and/or edges is to be canceled, PostCheck if postSubtract is to be called to decide or Complete if nodes and/or edges are allowed to be subtracted. It is typically triggered by the -- operation. The default implementation element-wise calls preSubtract(node, simple) or preSubtract(edge, simple), respectively. As for most cases this won't be satisfactory a domain-specific implementation should be provided. Use self to access the associated graph.