87 lines
2.5 KiB
C++
87 lines
2.5 KiB
C++
// Copyright 2010-2022 Google LLC
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "ortools/linear_solver/linear_solver_callback.h"
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#include <string>
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#include <vector>
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#include "ortools/base/logging.h"
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namespace operations_research {
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std::string ToString(MPCallbackEvent event) {
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switch (event) {
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case MPCallbackEvent::kMipSolution:
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return "MIP_SOLUTION";
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case MPCallbackEvent::kMip:
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return "MIP";
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case MPCallbackEvent::kMipNode:
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return "MIP_NODE";
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case MPCallbackEvent::kBarrier:
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return "BARRIER";
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case MPCallbackEvent::kMessage:
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return "MESSAGE";
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case MPCallbackEvent::kPresolve:
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return "PRESOLVE";
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case MPCallbackEvent::kPolling:
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return "POLLING";
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case MPCallbackEvent::kMultiObj:
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return "MULTI_OBJ";
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case MPCallbackEvent::kSimplex:
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return "SIMPLEX";
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case MPCallbackEvent::kUnknown:
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return "UNKNOWN";
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default:
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LOG(FATAL) << "Unrecognized callback event: " << static_cast<int>(event);
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}
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}
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namespace {
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// Returns true if any of the callbacks in a list might add cuts.
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bool CallbacksMightAddCuts(const std::vector<MPCallback*>& callbacks) {
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for (MPCallback* callback : callbacks) {
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if (callback->might_add_cuts()) {
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return true;
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}
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}
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return false;
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}
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// Returns true if any of the callbacks in a list might add lazy constraints.
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bool CallbacksMightAddLazyConstraints(
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const std::vector<MPCallback*>& callbacks) {
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for (MPCallback* callback : callbacks) {
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if (callback->might_add_lazy_constraints()) {
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return true;
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}
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}
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return false;
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}
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} // namespace
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MPCallbackList::MPCallbackList(const std::vector<MPCallback*>& callbacks)
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: MPCallback(CallbacksMightAddCuts(callbacks),
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CallbacksMightAddLazyConstraints(callbacks)),
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callbacks_(callbacks) {}
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void MPCallbackList::RunCallback(MPCallbackContext* context) {
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for (MPCallback* callback : callbacks_) {
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callback->RunCallback(context);
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}
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}
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} // namespace operations_research
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