com.google.errorprone.bugpatterns.javadoc.EscapedEntity Maven / Gradle / Ivy
/*
* Copyright 2018 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.javadoc;
import static com.google.errorprone.BugPattern.SeverityLevel.WARNING;
import static com.google.errorprone.bugpatterns.javadoc.Utils.diagnosticPosition;
import static com.google.errorprone.bugpatterns.javadoc.Utils.getDocTreePath;
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;
import com.google.errorprone.bugpatterns.BugChecker.ClassTreeMatcher;
import com.google.errorprone.bugpatterns.BugChecker.MethodTreeMatcher;
import com.google.errorprone.bugpatterns.BugChecker.VariableTreeMatcher;
import com.google.errorprone.matchers.Description;
import com.sun.source.doctree.LiteralTree;
import com.sun.source.tree.ClassTree;
import com.sun.source.tree.MethodTree;
import com.sun.source.tree.VariableTree;
import com.sun.source.util.DocTreePath;
import com.sun.source.util.DocTreePathScanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.annotation.Nullable;
/**
* Finds unescaped entities in Javadocs.
*
* @author [email protected] (Graeme Morgan)
*/
@BugPattern(
name = "EscapedEntity",
summary = "HTML entities in @code/@literal tags will appear literally in the rendered javadoc.",
severity = WARNING,
documentSuppression = false)
public final class EscapedEntity extends BugChecker
implements ClassTreeMatcher, MethodTreeMatcher, VariableTreeMatcher {
private static final Pattern HTML_ENTITY =
Pattern.compile("&[a-z0-9]+;|[0-9]+;|[0-9a-f]+;", Pattern.CASE_INSENSITIVE);
@Override
public Description matchClass(ClassTree classTree, VisitorState state) {
return handle(getDocTreePath(state), state);
}
@Override
public Description matchMethod(MethodTree methodTree, VisitorState state) {
return handle(getDocTreePath(state), state);
}
@Override
public Description matchVariable(VariableTree variableTree, VisitorState state) {
return handle(getDocTreePath(state), state);
}
private Description handle(@Nullable DocTreePath path, VisitorState state) {
if (path == null) {
return NO_MATCH;
}
new Scanner(state).scan(path, null);
return NO_MATCH;
}
private final class Scanner extends DocTreePathScanner {
private final VisitorState state;
private Scanner(VisitorState state) {
this.state = state;
}
@Override
public Void visitLiteral(LiteralTree node, Void unused) {
Matcher matcher = HTML_ENTITY.matcher(node.getBody().getBody());
if (matcher.find()) {
state.reportMatch(buildDescription(diagnosticPosition(getCurrentPath(), state)).build());
}
return super.visitLiteral(node, null);
}
}
}