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/*
 * Copyright 2020 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.provider;

public class DefaultConfigurationTimeBarrier implements ConfigurationTimeBarrier {

    private volatile boolean atConfigurationTime = false;

    public void prepare() {
        atConfigurationTime = true;
    }

    public void cross() {
        if (!atConfigurationTime) {
            throw new IllegalStateException("Configuration time barrier can only be crossed once.");
        }
        atConfigurationTime = false;
    }

    @Override
    public boolean isAtConfigurationTime() {
        return atConfigurationTime;
    }
}