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/*
 * 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 com.facebook.presto.spi;

import java.util.Collections;
import java.util.List;

public interface WarningCollector
{
    WarningCollector NOOP =
            new WarningCollector()
            {
                @Override
                public void add(PrestoWarning warning) {}

                @Override
                public List getWarnings()
                {
                    return Collections.unmodifiableList(Collections.emptyList());
                }

                @Override
                public boolean hasWarnings()
                {
                    return false;
                }
            };

    void add(PrestoWarning warning);

    List getWarnings();

    boolean hasWarnings();
}