| // Copyright (C) 2017 The Android Open Source Project |
| // |
| // 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. |
| |
| package gerrit; |
| |
| import com.google.gerrit.server.rules.StoredValues; |
| import com.google.gwtorm.server.OrmException; |
| import com.googlecode.prolog_cafe.exceptions.JavaException; |
| import com.googlecode.prolog_cafe.exceptions.PrologException; |
| import com.googlecode.prolog_cafe.lang.IntegerTerm; |
| import com.googlecode.prolog_cafe.lang.Operation; |
| import com.googlecode.prolog_cafe.lang.Predicate; |
| import com.googlecode.prolog_cafe.lang.Prolog; |
| import com.googlecode.prolog_cafe.lang.Term; |
| |
| /** Checks if change is a pure revert of the change it references in 'revertOf'. */ |
| public class PRED_pure_revert_1 extends Predicate.P1 { |
| public PRED_pure_revert_1(Term a1, Operation n) { |
| arg1 = a1; |
| cont = n; |
| } |
| |
| @Override |
| public Operation exec(Prolog engine) throws PrologException { |
| engine.setB0(); |
| Term a1 = arg1.dereference(); |
| |
| Boolean isPureRevert; |
| try { |
| isPureRevert = StoredValues.CHANGE_DATA.get(engine).isPureRevert(); |
| } catch (OrmException e) { |
| throw new JavaException(this, 1, e); |
| } |
| if (!a1.unify(new IntegerTerm(Boolean.TRUE.equals(isPureRevert) ? 1 : 0), engine.trail)) { |
| return engine.fail(); |
| } |
| return cont; |
| } |
| } |