86 lines
2.9 KiB
Java
86 lines
2.9 KiB
Java
// Copyright (C) 2011 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package gerrit;
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import com.google.gerrit.common.data.LabelType;
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import com.google.gerrit.common.data.LabelValue;
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import com.google.gerrit.server.rules.StoredValues;
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import com.google.gwtorm.server.OrmException;
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import com.googlecode.prolog_cafe.exceptions.JavaException;
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import com.googlecode.prolog_cafe.exceptions.PrologException;
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import com.googlecode.prolog_cafe.lang.IntegerTerm;
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import com.googlecode.prolog_cafe.lang.ListTerm;
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import com.googlecode.prolog_cafe.lang.Operation;
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import com.googlecode.prolog_cafe.lang.Predicate;
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import com.googlecode.prolog_cafe.lang.Prolog;
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import com.googlecode.prolog_cafe.lang.StructureTerm;
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import com.googlecode.prolog_cafe.lang.SymbolTerm;
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import com.googlecode.prolog_cafe.lang.Term;
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import java.util.List;
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/**
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* Obtain a list of label types from the server configuration.
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*
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* <p>Unifies to a Prolog list of: {@code label_type(Label, Fun, Min, Max)} where:
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*
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* <ul>
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* <li>{@code Label} - the newer style label name
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* <li>{@code Fun} - legacy function name
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* <li>{@code Min, Max} - the smallest and largest configured values.
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* </ul>
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*/
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class PRED_get_legacy_label_types_1 extends Predicate.P1 {
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private static final SymbolTerm NONE = SymbolTerm.intern("none");
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PRED_get_legacy_label_types_1(Term a1, Operation n) {
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arg1 = a1;
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cont = n;
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}
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@Override
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public Operation exec(Prolog engine) throws PrologException {
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engine.setB0();
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Term a1 = arg1.dereference();
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List<LabelType> list;
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try {
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list = StoredValues.CHANGE_DATA.get(engine).getLabelTypes().getLabelTypes();
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} catch (OrmException err) {
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throw new JavaException(this, 1, err);
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}
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Term head = Prolog.Nil;
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for (int idx = list.size() - 1; 0 <= idx; idx--) {
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head = new ListTerm(export(list.get(idx)), head);
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}
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if (!a1.unify(head, engine.trail)) {
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return engine.fail();
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}
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return cont;
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}
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static final SymbolTerm symLabelType = SymbolTerm.intern("label_type", 4);
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static Term export(LabelType type) {
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LabelValue min = type.getMin();
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LabelValue max = type.getMax();
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return new StructureTerm(
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symLabelType,
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SymbolTerm.intern(type.getName()),
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SymbolTerm.intern(type.getFunction().getFunctionName()),
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min != null ? new IntegerTerm(min.getValue()) : NONE,
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max != null ? new IntegerTerm(max.getValue()) : NONE);
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}
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}
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