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/*
 * Copyright 2017 the original author or authors.
 *
 * 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
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.gradle.api.file;

import org.gradle.api.Project;
import org.gradle.api.provider.Provider;
import org.gradle.internal.service.scopes.Scope;
import org.gradle.internal.service.scopes.ServiceScope;

import java.io.File;

/**
 * Provides access to several important locations for a project.
 *
 * An instance of this type can be injected into a task, plugin or other object by annotating a public constructor or method with {@code javax.inject.Inject}. It is also available via {@link org.gradle.api.Project#getLayout()}.
 *
 * 
Note: This interface is not intended for implementation by build script or plugin authors.
 * @since 4.1
 */
@ServiceScope(Scope.Project.class)
public interface ProjectLayout {
    /**
     * Returns the project directory.
     */
    Directory getProjectDirectory();

    /**
     * Returns the build directory for the project.
     */
    DirectoryProperty getBuildDirectory();

    /**
     * Creates a {@link RegularFile} provider whose location is calculated from the given {@link Provider}.
     * 

     * File system locations based on relative paths will be
     * resolved against this layout's reference location, as defined by {@link #getProjectDirectory()}.
     */
    Provider file(Provider file);

    /**
     * Creates a {@link Directory} provider whose location is calculated from the given {@link Provider}.
     * 

     * File system locations based on relative paths will be
     * resolved against this layout's reference location, as defined by {@link #getProjectDirectory()}.
     *
     * @since 6.0
     */
    Provider dir(Provider file);

    /**
     * 
Creates a read-only {@link FileCollection} containing the given files, as defined by {@link Project#files(Object...)}.
     *
     * 
This method can also be used to create an empty collection, but the collection may not be mutated later.
     *
     * @param paths The paths to the files. May be empty.
     * @return The file collection. Never returns null.
     * @since 4.8
     */
    FileCollection files(Object... paths);
}