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// Copyright 2011 Google Inc. All Rights Reserved.
package gerrit;
import com.google.gerrit.common.data.LabelType;
import com.google.gerrit.common.data.LabelTypes;
import com.google.gerrit.reviewdb.client.PatchSetApproval;
import com.google.gerrit.server.query.change.ChangeData;
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.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.StructureTerm;
import com.googlecode.prolog_cafe.lang.SymbolTerm;
import com.googlecode.prolog_cafe.lang.Term;
/** Exports list of {@code commit_label( label('Code-Review', 2), user(12345789) )}. */
class PRED__load_commit_labels_1 extends Predicate.P1 {
private static final SymbolTerm sym_commit_label = SymbolTerm.intern("commit_label", 2);
private static final SymbolTerm sym_label = SymbolTerm.intern("label", 2);
private static final SymbolTerm sym_user = SymbolTerm.intern("user", 1);
PRED__load_commit_labels_1(Term a1, Operation n) {
arg1 = a1;
cont = n;
}
@Override
public Operation exec(Prolog engine) throws PrologException {
engine.setB0();
Term a1 = arg1.dereference();
Term listHead = Prolog.Nil;
try {
ChangeData cd = StoredValues.CHANGE_DATA.get(engine);
LabelTypes types = cd.getLabelTypes();
for (PatchSetApproval a : cd.currentApprovals()) {
LabelType t = types.byLabel(a.getLabelId());
if (t == null) {
continue;
}
StructureTerm labelTerm =
new StructureTerm(
sym_label, SymbolTerm.intern(t.getName()), new IntegerTerm(a.getValue()));
StructureTerm userTerm =
new StructureTerm(sym_user, new IntegerTerm(a.getAccountId().get()));
listHead = new ListTerm(new StructureTerm(sym_commit_label, labelTerm, userTerm), listHead);
}
} catch (OrmException err) {
throw new JavaException(this, 1, err);
}
if (!a1.unify(listHead, engine.trail)) {
return engine.fail();
}
return cont;
}
}
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