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/*
 * Copyright 2020 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 *
 *      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.kie.kogito.rules;

import java.util.function.Consumer;

import org.kie.api.runtime.rule.FactHandle;

public interface DataObserver {

    static  DataProcessor of(Consumer consumer) {
        return new DataProcessor() {
            @Override
            public FactHandle insert(DataHandle handle, T object) {
                consumer.accept(object);
                return null;
            }

            @Override
            public void update(DataHandle handle, T object) {

            }

            @Override
            public void delete(DataHandle handle) {

            }
        };
    }

    static  DataProcessor ofUpdatable(Consumer consumer) {
        return new DataProcessor() {
            @Override
            public FactHandle insert(DataHandle handle, T object) {
                consumer.accept(object);
                return null;
            }

            @Override
            public void update(DataHandle handle, T object) {
                consumer.accept(object);
            }

            @Override
            public void delete(DataHandle handle) {
                consumer.accept(null);
            }
        };
    }
}