com.google.errorprone.bugpatterns.time.ZoneIdOfZ Maven / Gradle / Ivy
/*
* Copyright 2020 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.time;
import static com.google.errorprone.BugPattern.SeverityLevel.ERROR;
import static com.google.errorprone.fixes.SuggestedFixes.qualifyType;
import static com.google.errorprone.matchers.Matchers.allOf;
import static com.google.errorprone.matchers.Matchers.anyOf;
import static com.google.errorprone.matchers.Matchers.not;
import static com.google.errorprone.matchers.Matchers.packageStartsWith;
import static com.google.errorprone.matchers.method.MethodMatchers.staticMethod;
import static com.google.errorprone.util.ASTHelpers.constValue;
import com.google.errorprone.BugPattern;
import com.google.errorprone.VisitorState;
import com.google.errorprone.bugpatterns.BugChecker;
import com.google.errorprone.bugpatterns.BugChecker.MethodInvocationTreeMatcher;
import com.google.errorprone.fixes.SuggestedFix;
import com.google.errorprone.matchers.Description;
import com.google.errorprone.matchers.Matcher;
import com.sun.source.tree.ExpressionTree;
import com.sun.source.tree.MethodInvocationTree;
/**
* This checker bans calls to {@code ZoneId.of("Z")} in favor of {@link java.time.ZoneOffset#UTC}.
*
* @author [email protected] (Kurt Alfred Kluever)
*/
@BugPattern(
name = "ZoneIdOfZ",
summary = "Use ZoneOffset.UTC instead of ZoneId.of(\"Z\").",
explanation =
"Avoid the magic constant (ZoneId.of(\"Z\")) in favor of a more descriptive API: "
+ " ZoneOffset.UTC",
severity = ERROR)
public final class ZoneIdOfZ extends BugChecker implements MethodInvocationTreeMatcher {
private static final String ZONE_OFFSET = "java.time.ZoneOffset";
private static final Matcher ZONE_ID_OF =
allOf(
staticMethod().onClass("java.time.ZoneId").named("of"),
not(anyOf(packageStartsWith("java."), packageStartsWith("tck.java."))));
@Override
public Description matchMethodInvocation(MethodInvocationTree tree, VisitorState state) {
if (ZONE_ID_OF.matches(tree, state)) {
String zone = constValue(tree.getArguments().get(0), String.class);
if (zone != null && zone.equals("Z")) {
SuggestedFix.Builder fix = SuggestedFix.builder().addImport(ZONE_OFFSET);
fix.replace(tree, String.format("%s.UTC", qualifyType(state, fix, ZONE_OFFSET)));
return describeMatch(tree, fix.build());
}
}
return Description.NO_MATCH;
}
}