org.gradle.api.internal.tasks.StaticValue Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of gradle-api Show documentation

Gradle 5.5.1 API redistribution.

There is a newer version: 8.6

/*
 * 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.internal.tasks;

import org.gradle.api.Task;
import org.gradle.api.internal.provider.ProducerAwareProperty;
import org.gradle.api.internal.provider.PropertyInternal;
import org.gradle.api.internal.tasks.properties.PropertyValue;
import org.gradle.api.provider.Provider;

import javax.annotation.Nullable;

public class StaticValue implements PropertyValue {
    private final Object value;

    public StaticValue(@Nullable Object value) {
        this.value = value;
    }

    @Override
    public void attachProducer(Task producer) {
        if (value instanceof ProducerAwareProperty) {
            ((ProducerAwareProperty)value).attachProducer(producer);
        }
    }

    @Override
    public void maybeFinalizeValue() {
        if (value instanceof PropertyInternal) {
            ((PropertyInternal)value).finalizeValueOnReadAndWarnAboutChanges();
        }
    }

    @Nullable
    @Override
    public Object call() {
        // Replace absent Provider with null.
        // This is required for allowing optional provider properties - all code which unpacks providers calls Provider.get() and would fail if an optional provider is passed.
        // Returning null from a Callable is ignored, and PropertyValue is a callable.
        if (value instanceof Provider && !((Provider) value).isPresent()) {
            return null;
        }
        return value;
    }

    @Nullable
    @Override
    public Object getUnprocessedValue() {
        return value;
    }
}