| // Copyright (C) 2011 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.common.data.Permission; |
| import com.google.gerrit.common.data.PermissionRange; |
| import com.google.gerrit.rules.StoredValues; |
| import com.google.gerrit.server.CurrentUser; |
| import com.google.gerrit.server.project.ChangeControl; |
| import com.googlecode.prolog_cafe.exceptions.IllegalTypeException; |
| import com.googlecode.prolog_cafe.exceptions.PInstantiationException; |
| import com.googlecode.prolog_cafe.exceptions.PrologException; |
| import com.googlecode.prolog_cafe.lang.IntegerTerm; |
| import com.googlecode.prolog_cafe.lang.JavaObjectTerm; |
| 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.SymbolTerm; |
| import com.googlecode.prolog_cafe.lang.Term; |
| import com.googlecode.prolog_cafe.lang.VariableTerm; |
| |
| /** |
| * Resolves the valid range for a label on a CurrentUser. |
| * |
| * <pre> |
| * '$user_label_range'(+Label, +CurrentUser, -Min, -Max) |
| * </pre> |
| */ |
| class PRED__user_label_range_4 extends Predicate.P4 { |
| PRED__user_label_range_4(Term a1, Term a2, Term a3, Term a4, Operation n) { |
| arg1 = a1; |
| arg2 = a2; |
| arg3 = a3; |
| arg4 = a4; |
| cont = n; |
| } |
| |
| @Override |
| public Operation exec(Prolog engine) throws PrologException { |
| engine.setB0(); |
| Term a1 = arg1.dereference(); |
| Term a2 = arg2.dereference(); |
| Term a3 = arg3.dereference(); |
| Term a4 = arg4.dereference(); |
| |
| if (a1 instanceof VariableTerm) { |
| throw new PInstantiationException(this, 1); |
| } |
| if (!(a1 instanceof SymbolTerm)) { |
| throw new IllegalTypeException(this, 1, "atom", a1); |
| } |
| String label = a1.name(); |
| |
| if (a2 instanceof VariableTerm) { |
| throw new PInstantiationException(this, 2); |
| } |
| if (!(a2 instanceof JavaObjectTerm) || !a2.convertible(CurrentUser.class)) { |
| throw new IllegalTypeException(this, 2, "CurrentUser)", a2); |
| } |
| CurrentUser user = (CurrentUser) ((JavaObjectTerm) a2).object(); |
| |
| ChangeControl ctl = StoredValues.CHANGE_CONTROL.get(engine).forUser(user); |
| PermissionRange range = ctl.getRange(Permission.LABEL + label); |
| if (range == null) { |
| return engine.fail(); |
| } |
| |
| IntegerTerm min = new IntegerTerm(range.getMin()); |
| IntegerTerm max = new IntegerTerm(range.getMax()); |
| |
| if (!a3.unify(min, engine.trail)) { |
| return engine.fail(); |
| } |
| |
| if (!a4.unify(max, engine.trail)) { |
| return engine.fail(); |
| } |
| |
| return cont; |
| } |
| } |