com.google.errorprone.bugpatterns.TransientMisuse 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.errorprone.BugPattern.LinkType.NONE;
import static com.google.errorprone.BugPattern.SeverityLevel.WARNING;
import com.google.common.collect.ImmutableList;
import com.google.errorprone.BugPattern;
import com.google.errorprone.VisitorState;
import com.google.errorprone.bugpatterns.BugChecker.VariableTreeMatcher;
import com.google.errorprone.fixes.SuggestedFix;
import com.google.errorprone.fixes.SuggestedFixes;
import com.google.errorprone.matchers.Description;
import com.sun.source.tree.VariableTree;
import javax.lang.model.element.Modifier;
/**
* Warns against use of both {@code static} and {@code transient} modifiers on field declarations.
*/
@BugPattern(
name = "TransientMisuse",
summary = "Static fields are implicitly transient, so the explicit modifier is unnecessary",
linkType = NONE,
severity = WARNING)
public class TransientMisuse extends BugChecker implements VariableTreeMatcher {
@Override
public Description matchVariable(VariableTree tree, VisitorState state) {
if (tree.getModifiers()
.getFlags()
.containsAll(ImmutableList.of(Modifier.STATIC, Modifier.TRANSIENT))) {
return describeMatch(
tree,
SuggestedFixes.removeModifiers(tree, state, Modifier.TRANSIENT)
.orElse(SuggestedFix.emptyFix()));
}
return Description.NO_MATCH;
}
}