/
edge.go
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/
edge.go
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// Mgmt
// Copyright (C) 2013-2024+ James Shubin and the project contributors
// Written by James Shubin <james@shubin.ca> and the project contributors
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//
// Additional permission under GNU GPL version 3 section 7
//
// If you modify this program, or any covered work, by linking or combining it
// with embedded mcl code and modules (and that the embedded mcl code and
// modules which link with this program, contain a copy of their source code in
// the authoritative form) containing parts covered by the terms of any other
// license, the licensors of this program grant you additional permission to
// convey the resulting work. Furthermore, the licensors of this program grant
// the original author, James Shubin, additional permission to update this
// additional permission if he deems it necessary to achieve the goals of this
// additional permission.
package engine
import (
"fmt"
)
// Edge is a struct that represents a graph's edge.
type Edge struct {
Name string
Notify bool // should we send a refresh notification along this edge?
refresh bool // is there a notify pending for the dest vertex ?
}
// String is a required method of the Edge interface that we must fulfill.
func (obj *Edge) String() string {
return obj.Name
}
// Cmp compares this edge to another. It returns nil if they are equivalent.
func (obj *Edge) Cmp(edge *Edge) error {
if obj.Name != edge.Name {
return fmt.Errorf("edge names differ")
}
if obj.Notify != edge.Notify {
return fmt.Errorf("notify values differ")
}
// FIXME: should we compare this as well?
//if obj.refresh != edge.refresh {
// return fmt.Errorf("refresh values differ")
//}
return nil
}
// Refresh returns the pending refresh status of this edge.
func (obj *Edge) Refresh() bool {
return obj.refresh
}
// SetRefresh sets the pending refresh status of this edge.
func (obj *Edge) SetRefresh(b bool) {
obj.refresh = b
}