= Spring Rewrite Commons
:partials_dir: spring-rewrite-commons-docs/src/main/antora/modules/ROOT/pages/partials
:project-version: 0.1.0-SNAPSHOT
:projectVersion: {project-version}
:docs: https://docs.spring.io/spring-rewrite-commons/docs/current-SNAPSHOT/reference/html/

[quote]
____
Spring Rewrite Commons provides a set of components to parse a Java project to https://github.com/openrewrite[OpenRewrite,window=_blank] LST and apply recipes outside a build tool plugin.
____


== Get started

=== Add Dependency

**Maven**
[source,xml,indent=0,subs="verbatim,quotes,attributes",role="primary"]
----
<dependency>
    <groupId>org.springframwork.rewrite</groupId>
    <artifactId>spring-rewrite-commons-launcher</artifactId>
    <version>{project-version}</version>
</dependency>
----

**Gradle**
[source,groovy,indent=0,subs="verbatim,quotes,attributes",role="secondary"s]
----
compile 'org.springframework.rewrite:spring-rewrite-commons-launcher:{projectVersion}'
----


=== Implement a Recipe Launcher

[source,java]
....
package com.acme.example;

import org.openrewrite.Recipe;
import org.openrewrite.SourceFile;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.rewrite.parsers.RewriteProjectParser;
import org.springframework.rewrite.parsers.RewriteProjectParsingResult;
import org.springframework.rewrite.project.resource.ProjectResourceSet;
import org.springframework.rewrite.project.resource.ProjectResourceSetFactory;
import org.springframework.rewrite.project.resource.ProjectResourceSetSerializer;
import org.springframework.rewrite.recipes.RewriteRecipeDiscovery;
import org.springframework.stereotype.Component;

import java.nio.file.Path;
import java.util.List;

@Component
public class MyMigrationApplication {

    @Autowired <1>
    private RewriteProjectParser parser;

    @Autowired
    private RewriteRecipeDiscovery discovery; <2>

    @Autowired
    private ProjectResourceSetFactory resourceSetFactory;

    @Autowired
    private ProjectResourceSetSerializer serializer;


    public void migrateToBoot3_1() {
        Path baseDir = Path.of("."); <2>
        String recipeName = "org.openrewrite.java.spring.boot3.UpgradeSpringBoot_3_1";
        Recipe boot3Upgrade = discovery.getByName(recipeName); <3>

        RewriteProjectParsingResult result = parser.parse(baseDir); <4>
        List<SourceFile> lst = result.sourceFiles(); <5>
        ProjectResourceSet resourceSet = resourceSetFactory.create(baseDir, lst); <6>
        resourceSet.apply(boot3Upgrade); <7>
        serializer.writeChanges(resourceSet); <8>
    }
}
....
<1> All components are Spring beans and can be injected as such.
<2> The path of the project that should be migrated.
<3> `RewriteRecipeDiscovery` is used to discover an OpenRewrite recipe by name.
<4> `RewriteProjectParser` parses a given project to OpenRewrite LST.
<5> The result contains the list of ``SourceFile``s (the LST).
<6> `ProjectResourceSetFactory` can be used to create a `ProjectResourceSet`.
<7> The recipe is applied to the `ProjectResourceSet` which wraps the LST.
<8> `ProjectResourceSetSerializer` is used to serialize the changes to disk.


== Reference documentation

Find the reference documentation link:{docs}[here].

== Contributing

https://help.github.com/articles/creating-a-pull-request[Pull requests] are welcome. Note, that we expect everyone to follow the https://github.com/spring-projects/.github/blob/main/CODE_OF_CONDUCT.md[code of conduct].

== License
Spring Rewrite Commons is Open Source software released under the
https://www.apache.org/licenses/LICENSE-2.0.html[Apache 2.0 license].