com.google.errorprone.bugpatterns.DuplicateMapKeys 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.SeverityLevel.ERROR;
import com.google.errorprone.BugPattern;
import com.google.errorprone.VisitorState;
import com.google.errorprone.bugpatterns.BugChecker.MethodInvocationTreeMatcher;
import com.google.errorprone.matchers.Description;
import com.google.errorprone.matchers.Matcher;
import com.google.errorprone.matchers.method.MethodMatchers;
import com.google.errorprone.util.ASTHelpers;
import com.sun.source.tree.ExpressionTree;
import com.sun.source.tree.MethodInvocationTree;
import java.util.HashSet;
import java.util.Set;
/**
* Flags duplicate keys used in ImmutableMap construction.
*
* @author [email protected] (Sumit Bhagwani)
*/
@BugPattern(
summary =
"Map#ofEntries will throw an IllegalArgumentException if there are any duplicate keys",
severity = ERROR)
public class DuplicateMapKeys extends BugChecker implements MethodInvocationTreeMatcher {
private static final Matcher METHOD_MATCHER =
MethodMatchers.staticMethod().onClass("java.util.Map").named("ofEntries");
private static final Matcher ENTRY_MATCHER =
MethodMatchers.staticMethod().onClass("java.util.Map").named("entry");
@Override
public Description matchMethodInvocation(MethodInvocationTree tree, VisitorState state) {
if (!METHOD_MATCHER.matches(tree, state)) {
return Description.NO_MATCH;
}
Set