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interface for exactly-k constraints and totalizer encoding for exactly k
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src/main/java/org/logicng/cardinalityconstraints/CCEXKTotalizer.java
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| /////////////////////////////////////////////////////////////////////////// | ||
| // __ _ _ ________ // | ||
| // / / ____ ____ _(_)____/ | / / ____/ // | ||
| // / / / __ \/ __ `/ / ___/ |/ / / __ // | ||
| // / /___/ /_/ / /_/ / / /__/ /| / /_/ / // | ||
| // /_____/\____/\__, /_/\___/_/ |_/\____/ // | ||
| // /____/ // | ||
| // // | ||
| // The Next Generation Logic Library // | ||
| // // | ||
| /////////////////////////////////////////////////////////////////////////// | ||
| // // | ||
| // Copyright 2015-2016 Christoph Zengler // | ||
| // // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); // | ||
| // you may not use this file except in compliance with the License. // | ||
| // You may obtain a copy of the License at // | ||
| // // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 // | ||
| // // | ||
| // Unless required by applicable law or agreed to in writing, software // | ||
| // distributed under the License is distributed on an "AS IS" BASIS, // | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or // | ||
| // implied. See the License for the specific language governing // | ||
| // permissions and limitations under the License. // | ||
| // // | ||
| /////////////////////////////////////////////////////////////////////////// | ||
|
|
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| /***************************************************************************************** | ||
| * Open-WBO -- Copyright (c) 2013-2015, Ruben Martins, Vasco Manquinho, Ines Lynce | ||
| * <p> | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy of | ||
| * this software and associated documentation files (the "Software"), to deal in | ||
| * the Software without restriction, including without limitation the rights to | ||
| * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of | ||
| * the Software, and to permit persons to whom the Software is furnished to do so, | ||
| * subject to the following conditions: | ||
| * <p> | ||
| * The above copyright notice and this permission notice shall be included in all | ||
| * copies or substantial portions of the Software. | ||
| * <p> | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS | ||
| * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR | ||
| * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | ||
| * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | ||
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
| *****************************************************************************************/ | ||
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| package org.logicng.cardinalityconstraints; | ||
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| import org.logicng.formulas.Formula; | ||
| import org.logicng.formulas.FormulaFactory; | ||
| import org.logicng.formulas.Variable; | ||
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| import java.util.List; | ||
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| /** | ||
| * Encodes that exactly 'rhs' variables can be assigned value true. Uses the totalizer encoding for | ||
| * translating the cardinality constraint into CNF. | ||
| * @version 1.1 | ||
| * @since 1.1 | ||
| */ | ||
| final class CCEXKTotalizer implements CCExactlyK { | ||
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| private final CCTotalizer totalizer; | ||
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| /** | ||
| * Constructs a new totalizer. | ||
| * @param f the formula factory | ||
| */ | ||
| CCEXKTotalizer(final FormulaFactory f) { | ||
| this.totalizer = new CCTotalizer(f); | ||
| } | ||
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| @Override | ||
| public List<Formula> build(final Variable[] vars, int rhs) { | ||
| return this.totalizer.buildEXK(vars, rhs); | ||
| } | ||
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| @Override | ||
| public CCIncrementalData incrementalData() { | ||
| return this.totalizer.incrementalData(); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return this.getClass().getSimpleName(); | ||
| } | ||
| } |
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56
src/main/java/org/logicng/cardinalityconstraints/CCExactlyK.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| /////////////////////////////////////////////////////////////////////////// | ||
| // __ _ _ ________ // | ||
| // / / ____ ____ _(_)____/ | / / ____/ // | ||
| // / / / __ \/ __ `/ / ___/ |/ / / __ // | ||
| // / /___/ /_/ / /_/ / / /__/ /| / /_/ / // | ||
| // /_____/\____/\__, /_/\___/_/ |_/\____/ // | ||
| // /____/ // | ||
| // // | ||
| // The Next Generation Logic Library // | ||
| // // | ||
| /////////////////////////////////////////////////////////////////////////// | ||
| // // | ||
| // Copyright 2015-2016 Christoph Zengler // | ||
| // // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); // | ||
| // you may not use this file except in compliance with the License. // | ||
| // You may obtain a copy of the License at // | ||
| // // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 // | ||
| // // | ||
| // Unless required by applicable law or agreed to in writing, software // | ||
| // distributed under the License is distributed on an "AS IS" BASIS, // | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or // | ||
| // implied. See the License for the specific language governing // | ||
| // permissions and limitations under the License. // | ||
| // // | ||
| /////////////////////////////////////////////////////////////////////////// | ||
|
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| package org.logicng.cardinalityconstraints; | ||
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| import org.logicng.formulas.Formula; | ||
| import org.logicng.formulas.Variable; | ||
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| import java.util.List; | ||
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| /** | ||
| * The interface for exactly-k (ALK) cardinality constraints. | ||
| * @version 1.1 | ||
| * @since 1.1 | ||
| */ | ||
| interface CCExactlyK { | ||
| /** | ||
| * Builds a cardinality constraint of the form {@code var_1 + var_2 + ... + var_n = k}. | ||
| * @param vars the variables {@code var_1 ... var_n} | ||
| * @param rhs the right hand side {@code k} of the constraint | ||
| * @return the CNF encoding of the cardinality constraint | ||
| * @throws IllegalArgumentException if the right hand side of the cardinality constraint is negative | ||
| */ | ||
| List<Formula> build(final Variable[] vars, int rhs); | ||
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| /** | ||
| * Returns the incremental data for the current encoded constraint. | ||
| * @return the incremental data for the current encoded constraint | ||
| */ | ||
| CCIncrementalData incrementalData(); | ||
| } |
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