abstract class Producer extends DefaultTask {
                @InputDirectory
                @SkipWhenEmpty
                abstract DirectoryProperty getSources()

                @OutputDirectory
                abstract DirectoryProperty getOutputDir()

                @TaskAction
                void listSources() {

perty] and link:{javadocPath}/org/gradle/api/file/DirectoryProperty.html[DirectoryProperty]. link:{javadocPath}/org/gradle/api/model/ObjectFactory.html[ObjectFactory] has methods to create these: link:{javadocPath}/org/gradle/api/model/ObjectFactory.html#fileProperty--[ObjectFactory.fileProperty()] and link:{javadocPath}/org/gradle/api/model/ObjectFactory.html#directoryProperty--[ObjectFactory.directoryProperty()].

A `DirectoryProperty` can also be used to create a lazily evaluated `Provider`...

            task.setClasspath(extension.getClasspath());

            // TODO: This should be in Javadoc task
            DirectoryProperty generatedJavadocDirectory = objects.directoryProperty();
            generatedJavadocDirectory.set(layout.getBuildDirectory().dir("javadoc"));
            task.getOutputs().dir(generatedJavadocDirectory);

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package gradlebuild.basics

import org.gradle.api.file.DirectoryProperty
import org.gradle.api.provider.Provider
import org.gradle.api.provider.ProviderFactory
import org.gradle.api.services.BuildService
import org.gradle.api.services.BuildServiceParameters

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package gradlebuild.binarycompatibility

import org.gradle.api.DefaultTask
import org.gradle.api.file.DirectoryProperty
import org.gradle.api.tasks.InputDirectory
import org.gradle.api.tasks.PathSensitive
import org.gradle.api.tasks.PathSensitivity
import org.gradle.api.tasks.TaskAction
import org.gradle.work.DisableCachingByDefault

 * limitations under the License.
 */

package gradlebuild.basics

import org.gradle.api.file.DirectoryProperty
import org.gradle.api.provider.Property


interface BuildEnvironmentExtension {
    val gitCommitId: Property<String>
    val gitBranch: Property<String>
    val repoRoot: DirectoryProperty

 */

package gradlebuild.docs;

import org.gradle.api.file.DirectoryProperty;
import org.gradle.api.provider.Property;

/**
 * Configuration for generating Dokka based Kotlin DSL docs.
 */
public abstract class KotlinDslReference {

    /**
     * The location of the final rendered Dokka content.
     */
    public abstract DirectoryProperty getRenderedDocumentation();

    /**

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package gradlebuild.cleanup.services

import org.gradle.api.file.DirectoryProperty
import org.gradle.api.logging.Logging
import org.gradle.api.services.BuildService
import org.gradle.api.services.BuildServiceParameters
import org.gradle.api.tasks.testing.TestDescriptor

            return new FixedDirectory(dir, dirResolver, fileCollectionFactory.withResolver(dirResolver));
        }
    }

    public static class DefaultDirectoryVar extends AbstractFileVar<Directory, DirectoryProperty> implements DirectoryProperty, Managed {
        private final FileResolver resolver;
        private final FileCollectionFactory fileCollectionFactory;

public abstract class AbstractCompile extends SourceTask {
    private final DirectoryProperty destinationDirectory;
    private FileCollection classpath;
    private String sourceCompatibility;
    private String targetCompatibility;

    public AbstractCompile() {
        this.destinationDirectory = getProject().getObjects().directoryProperty();
    }

    /**
     * Returns the classpath to use to compile the source files.