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// 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.reviewdb.client.Account;
import com.google.gerrit.rules.StoredValues;
import com.google.gerrit.server.AnonymousUser;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.PeerDaemonUser;
import com.google.gerrit.server.ReplicationUser;
import com.google.gerrit.server.project.ChangeControl;
import com.googlecode.prolog_cafe.lang.EvaluationException;
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.PrologException;
import com.googlecode.prolog_cafe.lang.StructureTerm;
import com.googlecode.prolog_cafe.lang.SymbolTerm;
import com.googlecode.prolog_cafe.lang.Term;
public class PRED_current_user_1 extends Predicate.P1 {
private static final long serialVersionUID = 1L;
private static final SymbolTerm user = SymbolTerm.intern("user", 1);
private static final SymbolTerm anonymous = SymbolTerm.intern("anonymous");
private static final SymbolTerm peerDaemon = SymbolTerm.intern("peer_daemon");
private static final SymbolTerm replication = SymbolTerm.intern("replication");
public PRED_current_user_1(Term a1, Operation n) {
arg1 = a1;
cont = n;
}
@Override
public Operation exec(Prolog engine) throws PrologException {
engine.setB0();
Term a1 = arg1.dereference();
ChangeControl cControl = StoredValues.CHANGE_CONTROL.get(engine);
CurrentUser curUser = cControl.getCurrentUser();
Term resultTerm;
if (curUser instanceof IdentifiedUser) {
Account.Id id = ((IdentifiedUser)curUser).getAccountId();
resultTerm = new IntegerTerm(id.get());
} else if (curUser instanceof AnonymousUser) {
resultTerm = anonymous;
} else if (curUser instanceof PeerDaemonUser) {
resultTerm = peerDaemon;
} else if (curUser instanceof ReplicationUser) {
resultTerm = replication;
} else {
throw new EvaluationException("Unknown user type");
}
if (!a1.unify(new StructureTerm(user, resultTerm), engine.trail)) {
return engine.fail();
}
return cont;
}
}
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