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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.server.query.change;
import static com.google.common.base.Preconditions.checkState;
import static java.util.Objects.requireNonNull;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.Change.Status;
import com.google.gerrit.index.query.HasCardinality;
import com.google.gerrit.index.query.Predicate;
import com.google.gerrit.index.query.QueryParseException;
import com.google.gerrit.server.index.change.ChangeField;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.NavigableMap;
import java.util.Objects;
import java.util.TreeMap;
/**
* Predicate for a {@link Status}.
*
* <p>The actual name of this operator can differ, it usually comes as {@code status:} but may also
* be {@code is:} to help do-what-i-meanery for end-users searching for changes. Either operator
* name has the same meaning.
*
* <p>Status names are looked up by prefix case-insensitively.
*/
public final class ChangeStatusPredicate extends ChangeIndexPredicate implements HasCardinality {
private static final String INVALID_STATUS = "__invalid__";
static final Predicate<ChangeData> NONE = new ChangeStatusPredicate(null);
private static final TreeMap<String, Predicate<ChangeData>> PREDICATES;
private static final Predicate<ChangeData> CLOSED;
private static final Predicate<ChangeData> OPEN;
static {
PREDICATES = new TreeMap<>();
List<Predicate<ChangeData>> open = new ArrayList<>();
List<Predicate<ChangeData>> closed = new ArrayList<>();
for (Change.Status s : Change.Status.values()) {
ChangeStatusPredicate p = forStatus(s);
String str = canonicalize(s);
checkState(
!INVALID_STATUS.equals(str),
"invalid status sentinel %s cannot match canonicalized status string %s",
INVALID_STATUS,
str);
PREDICATES.put(str, p);
(s.isOpen() ? open : closed).add(p);
}
CLOSED = Predicate.or(closed);
OPEN = Predicate.or(open);
PREDICATES.put("closed", CLOSED);
PREDICATES.put("open", OPEN);
PREDICATES.put("pending", OPEN);
}
public static String canonicalize(Change.Status status) {
return status.name().toLowerCase();
}
public static Predicate<ChangeData> parse(String value) throws QueryParseException {
String lower = value.toLowerCase();
NavigableMap<String, Predicate<ChangeData>> head = PREDICATES.tailMap(lower, true);
if (!head.isEmpty()) {
// Assume no statuses share a common prefix so we can only walk one entry.
Map.Entry<String, Predicate<ChangeData>> e = head.entrySet().iterator().next();
if (e.getKey().startsWith(lower)) {
return e.getValue();
}
}
throw new QueryParseException("Unrecognized value: " + value);
}
public static Predicate<ChangeData> open() {
return OPEN;
}
public static Predicate<ChangeData> closed() {
return CLOSED;
}
public static ChangeStatusPredicate forStatus(Change.Status status) {
return new ChangeStatusPredicate(requireNonNull(status));
}
@Nullable private final Change.Status status;
private ChangeStatusPredicate(@Nullable Change.Status status) {
super(ChangeField.STATUS, status != null ? canonicalize(status) : INVALID_STATUS);
this.status = status;
}
/**
* Get the status for this predicate.
*
* @return the status, or null if this predicate is intended to never match any changes.
*/
@Nullable
public Change.Status getStatus() {
return status;
}
@Override
public boolean match(ChangeData object) {
Change change = object.change();
return change != null && Objects.equals(status, change.getStatus());
}
@Override
public int hashCode() {
return Objects.hashCode(status);
}
@Override
public boolean equals(Object other) {
return (other instanceof ChangeStatusPredicate)
&& Objects.equals(status, ((ChangeStatusPredicate) other).status);
}
@Override
public String toString() {
return getOperator() + ":" + getValue();
}
@Override
public int getCardinality() {
if (getStatus() == null) {
return 0;
}
switch (getStatus()) {
case MERGED:
return 50_000;
case ABANDONED:
return 50_000;
case NEW:
default:
return 2000;
}
}
}
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