tech.picnic.errorprone.refasterrules.NullRulesRecipes Maven / Gradle / Ivy
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Extra Error Prone plugins by Picnic.
package tech.picnic.errorprone.refasterrules;
import org.openrewrite.ExecutionContext;
import org.openrewrite.Preconditions;
import org.openrewrite.Recipe;
import org.openrewrite.TreeVisitor;
import org.openrewrite.internal.lang.NonNullApi;
import org.openrewrite.java.JavaParser;
import org.openrewrite.java.JavaTemplate;
import org.openrewrite.java.JavaVisitor;
import org.openrewrite.java.search.*;
import org.openrewrite.java.template.Primitive;
import org.openrewrite.java.template.function.*;
import org.openrewrite.java.template.internal.AbstractRefasterJavaVisitor;
import org.openrewrite.java.tree.*;
import javax.annotation.Generated;
import java.util.*;
import static org.openrewrite.java.template.internal.AbstractRefasterJavaVisitor.EmbeddingOption.*;
/**
* OpenRewrite recipes created for Refaster template {@code tech.picnic.errorprone.refasterrules.NullRules}.
*/
@SuppressWarnings("all")
@Generated("org.openrewrite.java.template.processor.RefasterTemplateProcessor")
public class NullRulesRecipes extends Recipe {
/**
* Instantiates a new instance.
*/
public NullRulesRecipes() {}
@Override
public String getDisplayName() {
return "Refaster rules related to expressions dealing with (possibly) null values";
}
@Override
public String getDescription() {
return "Refaster template recipes for `tech.picnic.errorprone.refasterrules.NullRules`. [Source](https://error-prone.picnic.tech/refasterrules/NullRules).";
}
@Override
public List getRecipeList() {
return Arrays.asList(
new IsNullRecipe(),
new IsNotNullRecipe()
);
}
/**
* OpenRewrite recipe created for Refaster template {@code NullRules.IsNull}.
*/
@SuppressWarnings("all")
@NonNullApi
@Generated("org.openrewrite.java.template.processor.RefasterTemplateProcessor")
public static class IsNullRecipe extends Recipe {
/**
* Instantiates a new instance.
*/
public IsNullRecipe() {}
@Override
public String getDisplayName() {
return "Prefer the `==` operator (with `null` as the second operand) over `Objects#isNull(Object)`";
}
@Override
public String getDescription() {
return "Recipe created for the following Refaster template:\n```java\nstatic final class IsNull {\n \n @BeforeTemplate\n boolean before(@Nullable\n Object object) {\n return Refaster.anyOf(null == object, Objects.isNull(object));\n }\n \n @AfterTemplate\n boolean after(@Nullable\n Object object) {\n return object == null;\n }\n}\n```\n.";
}
@Override
public TreeVisitor getVisitor() {
JavaVisitor javaVisitor = new AbstractRefasterJavaVisitor() {
final JavaTemplate before$0 = JavaTemplate
.builder("null == #{object:any([email protected] Object)}")
.build();
final JavaTemplate before$1 = JavaTemplate
.builder("java.util.Objects.isNull(#{object:any([email protected] Object)})")
.build();
final JavaTemplate after = JavaTemplate
.builder("#{object:any([email protected] Object)} == null")
.build();
@Override
public J visitMethodInvocation(J.MethodInvocation elem, ExecutionContext ctx) {
JavaTemplate.Matcher matcher;
if ((matcher = before$0.matcher(getCursor())).find()) {
return embed(
after.apply(getCursor(), elem.getCoordinates().replace(), matcher.parameter(0)),
getCursor(),
ctx,
SHORTEN_NAMES, SIMPLIFY_BOOLEANS
);
}
if ((matcher = before$1.matcher(getCursor())).find()) {
maybeRemoveImport("java.util.Objects");
return embed(
after.apply(getCursor(), elem.getCoordinates().replace(), matcher.parameter(0)),
getCursor(),
ctx,
SHORTEN_NAMES, SIMPLIFY_BOOLEANS
);
}
return super.visitMethodInvocation(elem, ctx);
}
};
return Preconditions.check(
Preconditions.and(
new UsesType<>("java.util.Objects", true),
new UsesMethod<>("java.util.Objects isNull(..)")
),
javaVisitor
);
}
}
/**
* OpenRewrite recipe created for Refaster template {@code NullRules.IsNotNull}.
*/
@SuppressWarnings("all")
@NonNullApi
@Generated("org.openrewrite.java.template.processor.RefasterTemplateProcessor")
public static class IsNotNullRecipe extends Recipe {
/**
* Instantiates a new instance.
*/
public IsNotNullRecipe() {}
@Override
public String getDisplayName() {
return "Prefer the `!=` operator (with `null` as the second operand) over `Objects#nonNull(Object)`";
}
@Override
public String getDescription() {
return "Recipe created for the following Refaster template:\n```java\nstatic final class IsNotNull {\n \n @BeforeTemplate\n boolean before(@Nullable\n Object object) {\n return Refaster.anyOf(null != object, Objects.nonNull(object));\n }\n \n @AfterTemplate\n boolean after(@Nullable\n Object object) {\n return object != null;\n }\n}\n```\n.";
}
@Override
public TreeVisitor getVisitor() {
JavaVisitor javaVisitor = new AbstractRefasterJavaVisitor() {
final JavaTemplate before$0 = JavaTemplate
.builder("null != #{object:any([email protected] Object)}")
.build();
final JavaTemplate before$1 = JavaTemplate
.builder("java.util.Objects.nonNull(#{object:any([email protected] Object)})")
.build();
final JavaTemplate after = JavaTemplate
.builder("#{object:any([email protected] Object)} != null")
.build();
@Override
public J visitMethodInvocation(J.MethodInvocation elem, ExecutionContext ctx) {
JavaTemplate.Matcher matcher;
if ((matcher = before$0.matcher(getCursor())).find()) {
return embed(
after.apply(getCursor(), elem.getCoordinates().replace(), matcher.parameter(0)),
getCursor(),
ctx,
SHORTEN_NAMES, SIMPLIFY_BOOLEANS
);
}
if ((matcher = before$1.matcher(getCursor())).find()) {
maybeRemoveImport("java.util.Objects");
return embed(
after.apply(getCursor(), elem.getCoordinates().replace(), matcher.parameter(0)),
getCursor(),
ctx,
SHORTEN_NAMES, SIMPLIFY_BOOLEANS
);
}
return super.visitMethodInvocation(elem, ctx);
}
};
return Preconditions.check(
Preconditions.and(
new UsesType<>("java.util.Objects", true),
new UsesMethod<>("java.util.Objects nonNull(..)")
),
javaVisitor
);
}
}
}
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