com.google.errorprone.bugpatterns.LiteProtoToString Maven / Gradle / Ivy
/*
* Copyright 2019 The Error Prone Authors.
*
* 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.errorprone.bugpatterns;
import static com.google.common.collect.Streams.stream;
import static com.google.errorprone.BugPattern.SeverityLevel.WARNING;
import static com.google.errorprone.predicates.TypePredicates.allOf;
import static com.google.errorprone.predicates.TypePredicates.isDescendantOf;
import static com.google.errorprone.predicates.TypePredicates.isExactType;
import static com.google.errorprone.predicates.TypePredicates.not;
import static com.google.errorprone.util.ASTHelpers.getReceiver;
import static com.google.errorprone.util.ASTHelpers.getSymbol;
import com.google.common.collect.ImmutableSet;
import com.google.errorprone.BugPattern;
import com.google.errorprone.VisitorState;
import com.google.errorprone.fixes.Fix;
import com.google.errorprone.predicates.TypePredicate;
import com.sun.source.tree.ExpressionTree;
import com.sun.source.tree.MethodInvocationTree;
import com.sun.source.tree.Tree;
import com.sun.tools.javac.code.Type;
import java.util.Optional;
/** Flags calls to {@code toString} on lite protos. */
@BugPattern(
summary =
"toString() on lite protos will not generate a useful representation of the proto from"
+ " optimized builds. Consider whether using some subset of fields instead would"
+ " provide useful information.",
severity = WARNING)
public final class LiteProtoToString extends AbstractToString {
private static final String LITE_ENUM_MESSAGE =
"toString() on lite proto enums will generate different representations of the value from"
+ " development and optimized builds. Consider using #getNumber if you only need a"
+ " serialized representation of the value, or #name if you really need the name."
+ "";
private static final TypePredicate IS_LITE_PROTO =
allOf(
isDescendantOf("com.google.protobuf.MessageLite"),
not(isDescendantOf("com.google.protobuf.Message")),
not(isExactType("com.google.protobuf.UnknownFieldSet")));
private static final TypePredicate IS_LITE_ENUM =
allOf(
isDescendantOf("com.google.protobuf.Internal.EnumLite"),
not(isDescendantOf("com.google.protobuf.ProtocolMessageEnum")),
not(isDescendantOf("com.google.protobuf.Descriptors.EnumValueDescriptor")),
not(isDescendantOf("com.google.protobuf.AbstractMessageLite.InternalOneOfEnum")));
private static final ImmutableSet METHODS_STRIPPED_BY_OPTIMIZER =
ImmutableSet.builder()
.add("atVerbose", "atFine", "atFiner", "atFinest", "atDebug", "atConfig", "atInfo")
.add("v", "d", "i")
.build();
@Override
protected TypePredicate typePredicate() {
return LiteProtoToString::matches;
}
private static boolean matches(Type type, VisitorState state) {
if (state.errorProneOptions().isTestOnlyTarget()) {
return false;
}
if (isStrippedLogMessage(state)) {
return false;
}
return IS_LITE_PROTO.apply(type, state) || IS_LITE_ENUM.apply(type, state);
}
private static boolean isStrippedLogMessage(VisitorState state) {
return stream(state.getPath()).anyMatch(LiteProtoToString::isStrippedLogMessage);
}
private static boolean isStrippedLogMessage(Tree tree) {
for (; tree instanceof MethodInvocationTree; tree = getReceiver((MethodInvocationTree) tree)) {
if (METHODS_STRIPPED_BY_OPTIMIZER.contains(getSymbol(tree).getSimpleName().toString())) {
return true;
}
}
return false;
}
@Override
protected Optional descriptionMessageForDefaultMatch(Type type, VisitorState state) {
return Optional.of(IS_LITE_ENUM.apply(type, state) ? LITE_ENUM_MESSAGE : message());
}
@Override
protected Optional implicitToStringFix(ExpressionTree tree, VisitorState state) {
return Optional.empty();
}
@Override
protected Optional toStringFix(Tree parent, ExpressionTree tree, VisitorState state) {
return Optional.empty();
}
}