/*
 * Copyright 2009 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 java.util.Set;

/**
 * <p>A {@code ConfigurableFileCollection} is a mutable {@code FileCollection}.</p>
 *
 * <p>You can obtain an instance of {@code ConfigurableFileCollection} by calling {@link
 * org.gradle.api.Project#files(Object...)}</p>
 */
public interface ConfigurableFileCollection extends FileCollection {
    /**
     * Returns the set of source paths for this collection. The paths are evaluated as for {@link org.gradle.api.Project#files(Object...)}.
     *
     * @return The set of source paths. Returns an empty set if none.
     */
    Set<Object> getFrom();

    /**
     * Sets the source paths for this collection. The given paths are evaluated as for {@link org.gradle.api.Project#files(Object...)}.
     *
     * @param paths The paths.
     */
    void setFrom(Iterable<?> paths);

    /**
     * Sets the source paths for this collection. The given paths are evaluated as for {@link org.gradle.api.Project#files(Object...)}.
     *
     * @param paths The paths.
     */
    void setFrom(Object... paths);

    /**
     * Adds a set of source paths to this collection. The given paths are evaluated as for {@link org.gradle.api.Project#files(Object...)}.
     *
     * @param paths The files to add.
     * @return this
     */
    ConfigurableFileCollection from(Object... paths);

    /**
     * Returns the set of tasks which build the files of this collection.
     *
     * @return The set. Returns an empty set when there are no such tasks.
     */
    Set<Object> getBuiltBy();

    /**
     * Sets the tasks which build the files of this collection.
     *
     * @param tasks The tasks. These are evaluated as for {@link org.gradle.api.Task#dependsOn(Object...)}.
     * @return this
     */
    ConfigurableFileCollection setBuiltBy(Iterable<?> tasks);

    /**
     * Registers some tasks which build the files of this collection.
     *
     * @param tasks The tasks. These are evaluated as for {@link org.gradle.api.Task#dependsOn(Object...)}.
     * @return this
     */
    ConfigurableFileCollection builtBy(Object... tasks);
}
