// 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.ApprovalType;
import com.google.gerrit.common.data.ApprovalTypes;
import com.google.gerrit.rules.PrologEnvironment;
import com.googlecode.prolog_cafe.lang.IntegerTerm;
import com.googlecode.prolog_cafe.lang.ListTerm;
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.PrologException;
import com.googlecode.prolog_cafe.lang.StructureTerm;
import com.googlecode.prolog_cafe.lang.SymbolTerm;
import com.googlecode.prolog_cafe.lang.Term;
import java.util.List;
/**
* Obtain a list of approval types from the server configuration.
* <p>
* Unifies to a Prolog list of: {@code approval_type(Label, Id, Fun, Min, Max)}
* where:
* <ul>
* <li>{@code Label} - the newer style label name</li>
* <li>{@code Id} - the legacy ApprovalCategory.Id from the database</li>
* <li>{@code Fun} - legacy function name</li>
* <li>{@code Min, Max} - the smallest and largest configured values.</li>
* </ul>
*/
class PRED_get_legacy_approval_types_1 extends Predicate.P1 {
private static final long serialVersionUID = 1L;
PRED_get_legacy_approval_types_1(Term a1, Operation n) {
arg1 = a1;
cont = n;
}
@Override
public Operation exec(Prolog engine) throws PrologException {
engine.setB0();
Term a1 = arg1.dereference();
PrologEnvironment env = (PrologEnvironment) engine.control;
ApprovalTypes types = env.getInjector().getInstance(ApprovalTypes.class);
List<ApprovalType> list = types.getApprovalTypes();
Term head = Prolog.Nil;
for (int idx = list.size() - 1; 0 <= idx; idx--) {
head = new ListTerm(export(list.get(idx)), head);
}
if (!a1.unify(head, engine.trail)) {
return engine.fail();
}
return cont;
}
static final SymbolTerm symApprovalType = SymbolTerm.intern(
"approval_type", 5);
static Term export(ApprovalType type) {
return new StructureTerm(symApprovalType,
SymbolTerm.intern(type.getCategory().getLabelName()),
SymbolTerm.intern(type.getCategory().getId().get()),
SymbolTerm.intern(type.getCategory().getFunctionName()),
new IntegerTerm(type.getMin().getValue()),
new IntegerTerm(type.getMax().getValue()));
}
}