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// Copyright (C) 2009 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 com.google.gerrit.common.data;
import com.google.gerrit.reviewdb.client.LabelId;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class LabelTypes {
protected List<LabelType> labelTypes;
private transient volatile Map<String, LabelType> byLabel;
private transient volatile Map<String, Integer> positions;
protected LabelTypes() {}
public LabelTypes(List<? extends LabelType> approvals) {
labelTypes = Collections.unmodifiableList(new ArrayList<>(approvals));
}
public List<LabelType> getLabelTypes() {
return labelTypes;
}
public LabelType byLabel(LabelId labelId) {
return byLabel().get(labelId.get().toLowerCase());
}
public LabelType byLabel(String labelName) {
return byLabel().get(labelName.toLowerCase());
}
private Map<String, LabelType> byLabel() {
if (byLabel == null) {
synchronized (this) {
if (byLabel == null) {
Map<String, LabelType> l = new HashMap<>();
if (labelTypes != null) {
for (LabelType t : labelTypes) {
l.put(t.getName().toLowerCase(), t);
}
}
byLabel = l;
}
}
}
return byLabel;
}
@Override
public String toString() {
return labelTypes.toString();
}
public Comparator<String> nameComparator() {
final Map<String, Integer> positions = positions();
return new Comparator<String>() {
@Override
public int compare(String left, String right) {
int lp = position(left);
int rp = position(right);
int cmp = lp - rp;
if (cmp == 0) {
cmp = left.compareTo(right);
}
return cmp;
}
private int position(String name) {
Integer p = positions.get(name);
return p != null ? p : positions.size();
}
};
}
private Map<String, Integer> positions() {
if (positions == null) {
synchronized (this) {
if (positions == null) {
Map<String, Integer> p = new HashMap<>();
if (labelTypes != null) {
int i = 0;
for (LabelType t : labelTypes) {
p.put(t.getName(), i++);
}
}
positions = p;
}
}
}
return positions;
}
}
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