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PreferJavaUtilOptionalOrSupplier.java
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PreferJavaUtilOptionalOrSupplier.java
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/*
* Copyright 2023 the original author or authors.
* <p>
* 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
* <p>
* https://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.migrate.guava;
import lombok.EqualsAndHashCode;
import lombok.Value;
import org.openrewrite.ExecutionContext;
import org.openrewrite.Preconditions;
import org.openrewrite.Recipe;
import org.openrewrite.TreeVisitor;
import org.openrewrite.java.JavaIsoVisitor;
import org.openrewrite.java.JavaTemplate;
import org.openrewrite.java.MethodMatcher;
import org.openrewrite.java.search.UsesJavaVersion;
import org.openrewrite.java.search.UsesMethod;
import org.openrewrite.java.tree.J;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
@Value
@EqualsAndHashCode(callSuper = false)
public class PreferJavaUtilOptionalOrSupplier extends Recipe {
static final MethodMatcher METHOD_MATCHER = new MethodMatcher("com.google.common.base.Optional or(com.google.common.base.Optional)");
@Override
public String getDisplayName() {
return "Prefer `java.util.Optional#or(Supplier<T extends java.util.Optional<T>>)`";
}
@Override
public String getDescription() {
return "Prefer `java.util.Optional#or(Supplier<T extends java.util.Optional<T>>)` over `com.google.common.base.Optional#or(com.google.common.base.Optional).";
}
@Override
public Set<String> getTags() {
return new HashSet<>(Arrays.asList("RSPEC-S4738", "guava"));
}
@Override
public TreeVisitor<?, ExecutionContext> getVisitor() {
return Preconditions.check(
Preconditions.and(new UsesJavaVersion<>(9),
new UsesMethod<>(METHOD_MATCHER)),
new PreferJavaUtilOptionalOrSupplierVisitor());
}
private static class PreferJavaUtilOptionalOrSupplierVisitor extends JavaIsoVisitor<ExecutionContext> {
@Override
public J.MethodInvocation visitMethodInvocation(J.MethodInvocation method, ExecutionContext ctx) {
J.MethodInvocation mi = super.visitMethodInvocation(method, ctx);
if (METHOD_MATCHER.matches(method)) {
mi = JavaTemplate.builder("#{any(java.util.Optional)}.or(() -> #{any(java.util.Optional)})")
.contextSensitive()
.imports("java.util.Optional")
.build()
.apply(
updateCursor(mi),
method.getCoordinates().replace(),
mi.getSelect(),
mi.getArguments().get(0));
maybeAddImport("java.util.Optional");
maybeRemoveImport("com.google.common.base.Optional");
}
return mi;
}
}
}