import org.gradle.api.tasks.Input
import org.gradle.api.tasks.TaskAction
import org.gradle.workers.WorkAction
import org.gradle.workers.WorkParameters
import org.gradle.workers.WorkerExecutor
import org.gradle.tooling.provider.model.ToolingModelBuilderRegistry
import org.gradle.tooling.provider.model.ToolingModelBuilder

plugins {
    id 'groovy'
}

repositories {
    mavenCentral()
}

// tag::object-factory[]

To create a task, inherit from the `DefaultTask` class and implement a link:{javadocPath}/org/gradle/api/tasks/TaskAction.html[`@TaskAction`] handler:

.build.gradle.kts
[source,kotlin]
----
abstract class CreateFileTask : DefaultTask() {
    @TaskAction
    fun action() {
        val file = File("myfile.txt")
        file.createNewFile()
        file.writeText("HELLO FROM MY TASK")
    }
}

        if (method.getAnnotation(TaskAction.class) == null) {
            return null;
        }
        Class<?> declaringClass = method.getDeclaringClass();
        if (Modifier.isStatic(method.getModifiers())) {
            throw new GradleException(String.format("Cannot use @TaskAction annotation on static method %s.%s().",

import org.gradle.api.DefaultTask
import org.gradle.api.tasks.Nested
import org.gradle.api.tasks.TaskAction

class ManagedNestedBeanJavaInterOpIntegrationTest extends AbstractNestedBeanJavaInterOpIntegrationTest {
    def setup() {
        pluginDir.file("src/main/java/SomeTask.java") << """
            import ${DefaultTask.name};
            import ${TaskAction.name};
            import ${Nested.name};

                @Internal abstract Property<String> getOther()

                @Internal Provider<String> getFoo() {
                    return other;
                }

                @TaskAction
                void useIt() {
                    assert foo.get() == "foobar"
                }
            }
            tasks.register("mytask", MyTask) {

package org.example;

import org.gradle.api.DefaultTask;
import org.gradle.api.tasks.TaskAction;

public class GreetingTask extends DefaultTask {
    @TaskAction
    public void greet() {
        System.out.println("Hello from Gradle <7");
    }

package org.example;

import org.gradle.api.DefaultTask;
import org.gradle.api.tasks.TaskAction;

public class GreetingTask extends DefaultTask {
    @TaskAction
    public void greet() {
        System.out.println("Hello from Gradle 7+");
    }

package org.example;

import org.gradle.api.DefaultTask;
import org.gradle.api.tasks.TaskAction;

public class GreetingTask extends DefaultTask {
    @TaskAction
    public void greet() {
        System.out.println("Hello from Gradle 7+");
    }

package org.example

import org.gradle.api.DefaultTask
import org.gradle.api.tasks.TaskAction

abstract class MyTask extends DefaultTask {

    @TaskAction
    void action() {}

package org.gradle

import org.gradle.api.DefaultTask
import org.gradle.api.tasks.TaskAction
import org.gradle.api.tasks.Input

class GreetingTask extends DefaultTask {

    @Input
    String greeting = 'hello from GreetingTask'

    @TaskAction
    def greet() {
        println greeting
    }