package com.tesora.dve.sql.transform.execution;

/*
 * #%L
 * Tesora Inc.
 * Database Virtualization Engine
 * %%
 * Copyright (C) 2011 - 2014 Tesora Inc.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import com.tesora.dve.common.catalog.StorageGroup;
import com.tesora.dve.sql.schema.ConnectionValues;
import com.tesora.dve.sql.schema.PEDatabase;
import com.tesora.dve.sql.schema.PEStorageGroup;
import com.tesora.dve.sql.schema.Persistable;
import com.tesora.dve.sql.schema.SchemaContext;
import com.tesora.dve.sql.schema.cache.CacheInvalidationRecord;

public abstract class CatalogModificationExecutionStep extends ExecutionStep {

	public enum Action {
		CREATE, DROP, ALTER
	}
	
	protected Persistable<?,?> rootEntity;
	protected Action action;

	protected Long updateCountOverride = null;
	
	public CatalogModificationExecutionStep(PEDatabase db, PEStorageGroup tsg, Persistable<?,?> root,
			Action act) {
		super(db, tsg, ExecutionType.DDL);
		this.rootEntity = root;
		this.action = act;
	}

	public Action getAction() {
		return action;
	}
		
	@Override
	public StorageGroup getStorageGroup(SchemaContext sc, ConnectionValues cv) {
		if (sg == null) return null;
		return sg.getPersistent(sc, cv);
	}

	@Override
	public abstract CacheInvalidationRecord getCacheInvalidation(SchemaContext sc);

	@Override
	public Long getUpdateCount(SchemaContext sc, ConnectionValues cv) {
		if (updateCountOverride != null) 
			return updateCountOverride;
		return super.getUpdateCount(sc, cv);
	}

	public void setUpdateCountOverride(Long v) {
		updateCountOverride = v;
	}	
}