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Data definition and queries Kotlin DSL over Xodus

There is a newer version: 2.0.0

/**
 * Copyright 2006 - 2017 JetBrains s.r.o.
 *
 * 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 jetbrains.exodus.database;

import jetbrains.exodus.entitystore.Entity;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public abstract class EntityCreator {

    @NotNull
    private final String type;

    public EntityCreator(@NotNull final String type) {
        this.type = type;
    }

    // if the result is not found, new entity will be created
    @Nullable
    public abstract Entity find();

    public abstract void created(@NotNull final Entity entity);

    @NotNull
    public String getType() {
        return type;
    }

}