org.openrewrite.java.search.FindAnnotations Maven / Gradle / Ivy
/*
* Copyright 2020 the original author or 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
*
* https://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 org.openrewrite.java.search;
import lombok.Data;
import org.antlr.v4.runtime.CharStreams;
import org.antlr.v4.runtime.CommonTokenStream;
import org.openrewrite.Tree;
import org.openrewrite.java.AbstractJavaSourceVisitor;
import org.openrewrite.java.internal.grammar.AnnotationSignatureParser;
import org.openrewrite.java.internal.grammar.AspectJLexer;
import org.openrewrite.java.tree.J;
import org.openrewrite.java.tree.JavaType;
import org.openrewrite.java.tree.TypeUtils;
import java.util.List;
import static java.util.Collections.emptyList;
import static java.util.Collections.singletonList;
import static java.util.stream.Collectors.toList;
public class FindAnnotations extends AbstractJavaSourceVisitor> {
private final AnnotationMatcher matcher;
public FindAnnotations(String signature) {
this.matcher = new AnnotationMatcher(signature);
}
@Override
public List defaultTo(Tree t) {
return emptyList();
}
@Override
public List visitAnnotation(J.Annotation annotation) {
return matcher.matches(annotation) ? singletonList(annotation) : emptyList();
}
private static class AnnotationMatcher {
private final AnnotationSignatureParser.AnnotationContext match;
public AnnotationMatcher(String signature) {
this.match = new AnnotationSignatureParser(new CommonTokenStream(new AspectJLexer(CharStreams.fromString(signature))))
.annotation();
}
public boolean matches(J.Annotation annotation) {
return matchesAnnotationName(annotation) &&
matchesSingleParameter(annotation) &&
matchesNamedParameters(annotation);
}
private boolean matchesAnnotationName(J.Annotation annotation) {
JavaType.Class typeAsClass = TypeUtils.asClass(annotation.getType());
return match.annotationName().getText().equals(typeAsClass == null ? null : typeAsClass.getFullyQualifiedName());
}
private boolean matchesNamedParameters(J.Annotation annotation) {
AnnotationSignatureParser.ElementValuePairsContext pairs = match.elementValuePairs();
if(pairs == null || pairs.elementValuePair() == null) {
return true;
}
List matchArgs = pairs.elementValuePair().stream()
.map(pair -> new AnnotationParameter(pair.Identifier().getText(), pair.elementValue().getText()))
.collect(toList());
return annotation.getArgs() != null && annotation.getArgs().getArgs().stream()
.map(arg -> {
J.Assign assign = (J.Assign) arg;
return new AnnotationParameter(assign.getVariable().printTrimmed(), assign.getAssignment().printTrimmed());
})
.allMatch(param -> matchArgs.stream().anyMatch(param::equals));
}
private boolean matchesSingleParameter(J.Annotation annotation) {
if(match.elementValue() == null) {
return true;
}
return annotation.getArgs() == null || annotation.getArgs().getArgs().stream()
.findAny()
.map(arg -> {
if (arg instanceof J.Assign) {
return ((J.Assign) arg).getAssignment().printTrimmed().equals(match.elementValue().getText());
}
if (arg instanceof J.Literal) {
return ((J.Literal) arg).getValueSource().equals(match.elementValue().getText());
}
return false;
})
.orElse(true);
}
@Data
private static class AnnotationParameter {
private final String id;
private final String value;
}
}
}