41 lines
1.4 KiB
Java
41 lines
1.4 KiB
Java
// Copyright 2010-2011 Google
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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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package com.google.ortools.constraintsolver;
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/**
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* This class acts as a intermediate step between a c++ decision builder
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* and a java one. Its main purpose is to catch the java exception launched
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* when a failure occurs during the Next() call, and to return silently
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* a FailDecision that will propagate the failure back to the C++ code.
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*
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*/
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public class JavaDecisionBuilder extends DecisionBuilder {
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/**
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* This methods wraps the calls to next() and catches fail exceptions.
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*/
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public final Decision nextWrap(Solver solver) {
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try {
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return next(solver);
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} catch (FailException e) {
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return solver.makeFailDecision();
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}
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}
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/**
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* This is the new method to subclass when defining a java decision builder.
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*/
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public Decision next(Solver solver) throws FailException {
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return null;
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}
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}
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