gradle-master/subprojects/core-api/src/main/java/org/gradle/api/tasks/TaskOutputFilePropertyBuilder.java
/*
 * Copyright 2016 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.tasks;

/**
 * Describes an output property of a task that contains zero or more files.
 *
 * @since 3.0
 */
public interface TaskOutputFilePropertyBuilder extends TaskFilePropertyBuilder {
    /**
     * {@inheritDoc}
     */
    @Override
    TaskOutputFilePropertyBuilder withPropertyName(String propertyName);

    /**
     * Marks a task property as optional. This means that a value does not have to be specified for the property, but any
     * value specified must meet the validation constraints for the property.
     */
    TaskOutputFilePropertyBuilder optional();

    /**
     * Sets whether the task property is optional. If the task property is optional, it means that a value does not have to be
     * specified for the property, but any value specified must meet the validation constraints for the property.
     */
    TaskOutputFilePropertyBuilder optional(boolean optional);
}
