com.google.errorprone.bugpatterns.SystemOut 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;
import static com.google.errorprone.BugPattern.SeverityLevel.WARNING;
import static com.google.errorprone.matchers.Description.NO_MATCH;
import static com.google.errorprone.matchers.FieldMatchers.staticField;
import static com.google.errorprone.matchers.Matchers.anyOf;
import static com.google.errorprone.matchers.Matchers.instanceMethod;
import static com.google.errorprone.matchers.Matchers.staticMethod;
import com.google.errorprone.BugPattern;
import com.google.errorprone.BugPattern.StandardTags;
import com.google.errorprone.VisitorState;
import com.google.errorprone.bugpatterns.BugChecker.MemberSelectTreeMatcher;
import com.google.errorprone.bugpatterns.BugChecker.MethodInvocationTreeMatcher;
import com.google.errorprone.matchers.Description;
import com.google.errorprone.matchers.Matcher;
import com.sun.source.tree.ExpressionTree;
import com.sun.source.tree.MemberSelectTree;
import com.sun.source.tree.MethodInvocationTree;
/** A {@link BugChecker}; see the associated {@link BugPattern} annotation for details. */
@BugPattern(
summary =
"Printing to standard output should only be used for debugging, not in production code",
severity = WARNING,
tags = StandardTags.LIKELY_ERROR)
public class SystemOut extends BugChecker
implements MethodInvocationTreeMatcher, MemberSelectTreeMatcher {
private static final Matcher SYSTEM_OUT =
anyOf(
staticField(System.class.getName(), "out"), //
staticField(System.class.getName(), "err"));
private static final Matcher PRINT_STACK_TRACE =
anyOf(
staticMethod().onClass(Thread.class.getName()).named("dumpStack").withNoParameters(),
instanceMethod()
.onDescendantOf(Throwable.class.getName())
.named("printStackTrace")
.withNoParameters());
@Override
public Description matchMemberSelect(MemberSelectTree tree, VisitorState state) {
if (SYSTEM_OUT.matches(tree, state)) {
return describeMatch(tree);
}
return NO_MATCH;
}
@Override
public Description matchMethodInvocation(MethodInvocationTree tree, VisitorState state) {
if (PRINT_STACK_TRACE.matches(tree, state)) {
return describeMatch(tree);
}
return NO_MATCH;
}
}