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// Copyright (C) 2010 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 com.google.common.collect.Lists;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.AccountGroup;
import com.google.gerrit.index.query.OrPredicate;
import com.google.gerrit.index.query.Predicate;
import com.google.gerrit.index.query.RangeUtil;
import com.google.gerrit.index.query.RangeUtil.Range;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.account.AccountResolver;
import com.google.gerrit.server.account.GroupBackend;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.gerrit.server.project.ProjectCache;
import com.google.gerrit.server.util.LabelVote;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.stream.IntStream;
public class LabelPredicate extends OrPredicate {
protected static final int MAX_LABEL_VALUE = 4;
protected static final int MAX_COUNT = 5; // inclusive
// Set a different max for label counts for in-memory label predicates. This is because the
// in-memory count is used by submit requirements to evaluate different expressions
// (applicability, submittability, override). The other MAX_COUNT is used by the change index and
// change queries.
private static final int MAX_COUNT_INTERNAL = 50; // inclusive
protected static class Args {
protected final AccountResolver accountResolver;
protected final ProjectCache projectCache;
protected final PermissionBackend permissionBackend;
protected final IdentifiedUser.GenericFactory userFactory;
protected final String value;
protected final Set accounts;
protected final AccountGroup.UUID group;
protected final Integer count;
protected final PredicateArgs.Operator countOp;
protected final GroupBackend groupBackend;
protected Args(
AccountResolver accountResolver,
ProjectCache projectCache,
PermissionBackend permissionBackend,
IdentifiedUser.GenericFactory userFactory,
String value,
Set accounts,
AccountGroup.UUID group,
@Nullable Integer count,
@Nullable PredicateArgs.Operator countOp,
GroupBackend groupBackend) {
this.accountResolver = accountResolver;
this.projectCache = projectCache;
this.permissionBackend = permissionBackend;
this.userFactory = userFactory;
this.value = value;
this.accounts = accounts;
this.group = group;
this.count = count;
this.countOp = countOp;
this.groupBackend = groupBackend;
}
}
protected static class Parsed {
protected final String label;
protected final String test;
protected final int numericValue;
protected Parsed(String label, String test, int numericValue) {
this.label = label;
this.test = test;
this.numericValue = numericValue;
}
}
protected final String value;
public LabelPredicate(
ChangeQueryBuilder.Arguments a,
String value,
Set accounts,
AccountGroup.UUID group,
@Nullable Integer count,
@Nullable PredicateArgs.Operator countOp) {
super(
predicates(
new Args(
a.accountResolver,
a.projectCache,
a.permissionBackend,
a.userFactory,
value,
accounts,
group,
count,
countOp,
a.groupBackend)));
this.value = value;
}
protected static List> predicates(Args args) {
String v = args.value;
List counts = getCounts(args.count, args.countOp);
try {
MagicLabelVote mlv = MagicLabelVote.parseWithEquals(v);
List> result = Lists.newArrayListWithCapacity(counts.size());
if (counts.isEmpty()) {
result.add(magicLabelPredicate(args, mlv, /* count= */ null));
} else {
counts.forEach(count -> result.add(magicLabelPredicate(args, mlv, count)));
}
return result;
} catch (IllegalArgumentException e) {
// Try next format.
}
Parsed parsed = null;
try {
LabelVote lv = LabelVote.parse(v);
parsed = new Parsed(lv.label(), "=", lv.value());
} catch (IllegalArgumentException e) {
// Try next format.
}
try {
LabelVote lv = LabelVote.parseWithEquals(v);
parsed = new Parsed(lv.label(), "=", lv.value());
} catch (IllegalArgumentException e) {
// Try next format.
}
Range range;
if (parsed == null) {
range = RangeUtil.getRange(v, -MAX_LABEL_VALUE, MAX_LABEL_VALUE);
if (range == null) {
range = new Range(v, 1, 1);
}
} else {
range =
RangeUtil.getRange(
parsed.label, parsed.test, parsed.numericValue, -MAX_LABEL_VALUE, MAX_LABEL_VALUE);
}
String prefix = range.prefix;
int min = range.min;
int max = range.max;
List> r =
Lists.newArrayListWithCapacity((counts.isEmpty() ? 1 : counts.size()) * (max - min + 1));
for (int i = min; i <= max; i++) {
if (counts.isEmpty()) {
r.add(onePredicate(args, prefix, i, /* count= */ null));
} else {
for (int count : counts) {
r.add(onePredicate(args, prefix, i, count));
}
}
}
return r;
}
protected static Predicate onePredicate(
Args args, String label, int expVal, @Nullable Integer count) {
if (expVal != 0) {
return equalsLabelPredicate(args, label, expVal, count);
}
return noLabelQuery(args, label);
}
protected static Predicate noLabelQuery(Args args, String label) {
List> r = Lists.newArrayListWithCapacity(2 * MAX_LABEL_VALUE);
for (int i = 1; i <= MAX_LABEL_VALUE; i++) {
r.add(equalsLabelPredicate(args, label, i, /* count= */ null));
r.add(equalsLabelPredicate(args, label, -i, /* count= */ null));
}
return not(or(r));
}
protected static Predicate equalsLabelPredicate(
Args args, String label, int expVal, @Nullable Integer count) {
if (args.groupBackend.isOrContainsExternalGroup(args.group)) {
// We can only get members of internal groups and negating an index search that doesn't
// include the external group information leads to incorrect query results. Use a
// PostFilterPredicate in this case instead.
return new EqualsLabelPredicates.PostFilterEqualsLabelPredicate(args, label, expVal, count);
}
if (args.accounts == null || args.accounts.isEmpty()) {
return new EqualsLabelPredicates.IndexEqualsLabelPredicate(args, label, expVal, count);
}
List> r = new ArrayList<>();
for (Account.Id a : args.accounts) {
r.add(new EqualsLabelPredicates.IndexEqualsLabelPredicate(args, label, expVal, a, count));
}
return or(r);
}
protected static Predicate magicLabelPredicate(
Args args, MagicLabelVote mlv, @Nullable Integer count) {
if (args.groupBackend.isOrContainsExternalGroup(args.group)) {
// We can only get members of internal groups and negating an index search that doesn't
// include the external group information leads to incorrect query results. Use a
// PostFilterPredicate in this case instead.
return new MagicLabelPredicates.PostFilterMagicLabelPredicate(args, mlv, count);
}
if (args.accounts == null || args.accounts.isEmpty()) {
return new MagicLabelPredicates.IndexMagicLabelPredicate(args, mlv, count);
}
List> r = new ArrayList<>();
for (Account.Id a : args.accounts) {
r.add(new MagicLabelPredicates.IndexMagicLabelPredicate(args, mlv, a, count));
}
return or(r);
}
private static List getCounts(
@Nullable Integer count, @Nullable PredicateArgs.Operator countOp) {
List result = new ArrayList<>();
if (count == null) {
return result;
}
switch (countOp) {
case EQUAL:
case GREATER_EQUAL:
case LESS_EQUAL:
result.add(count);
break;
case GREATER:
case LESS:
default:
break;
}
switch (countOp) {
case GREATER:
case GREATER_EQUAL:
IntStream.range(count + 1, MAX_COUNT_INTERNAL + 1).forEach(result::add);
break;
case LESS:
case LESS_EQUAL:
IntStream.range(0, count).forEach(result::add);
break;
case EQUAL:
default:
break;
}
return result;
}
@Override
public String toString() {
return ChangeQueryBuilder.FIELD_LABEL + ":" + value;
}
}
