com.google.errorprone.bugpatterns.EmptyCatch 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.LinkType.CUSTOM;
import static com.google.errorprone.BugPattern.SeverityLevel.WARNING;
import static com.google.errorprone.matchers.Description.NO_MATCH;
import com.google.errorprone.BugPattern;
import com.google.errorprone.VisitorState;
import com.google.errorprone.bugpatterns.BugChecker.CatchTreeMatcher;
import com.google.errorprone.matchers.Description;
import com.google.errorprone.util.ASTHelpers;
import com.sun.source.tree.BlockTree;
import com.sun.source.tree.CatchTree;
/** A {@link BugChecker}; see the associated {@link BugPattern} annotation for details. */
@BugPattern(
name = "EmptyCatch",
summary = "Caught exceptions should not be ignored",
severity = WARNING,
tags = BugPattern.StandardTags.STYLE,
documentSuppression = false,
linkType = CUSTOM,
link = "https://google.github.io/styleguide/javaguide.html#s6.2-caught-exceptions")
public class EmptyCatch extends BugChecker implements CatchTreeMatcher {
@Override
public Description matchCatch(CatchTree tree, VisitorState state) {
BlockTree block = tree.getBlock();
if (!block.getStatements().isEmpty()) {
return NO_MATCH;
}
if (state.getTokensForNode(block).stream().anyMatch(t -> !t.comments().isEmpty())) {
return NO_MATCH;
}
if (ASTHelpers.isJUnitTestCode(state)) {
return NO_MATCH;
}
if (ASTHelpers.isTestNgTestCode(state)) {
return NO_MATCH;
}
return describeMatch(tree);
}
}