package com.tesora.dve.sql.node.expression;

/*
 * #%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.sql.node.LanguageNode;
import com.tesora.dve.sql.parser.TokenTypes;
import com.tesora.dve.sql.schema.ConnectionValues;
import com.tesora.dve.sql.schema.cache.ConstantType;
import com.tesora.dve.sql.schema.cache.IAutoIncrementLiteralExpression;
import com.tesora.dve.sql.schema.cache.ILiteralExpression;
import com.tesora.dve.sql.transform.CopyContext;

public class AutoIncrementLiteralExpression extends DelegatingLiteralExpression implements IAutoIncrementLiteralExpression {

	private final int blockIndex;
	
	public AutoIncrementLiteralExpression(ConnectionValues cv, int position, int blockIndex) {
		super(TokenTypes.Unsigned_Large_Integer,null,cv,position,null);
		this.blockIndex = blockIndex;
	}
	
	protected AutoIncrementLiteralExpression(DelegatingLiteralExpression dle) {
		super(dle);
		this.blockIndex = ((AutoIncrementLiteralExpression)dle).getBlockIndex();
	}
	
	@Override
	public Object getValue(ConnectionValues cv) {
		return cv.getAutoincValue(this);
	}

	@Override
	protected LanguageNode copySelf(CopyContext cc) {
		return new AutoIncrementLiteralExpression(this);
	}

	@Override
	public ILiteralExpression getCacheExpression() {
		return new CachedAutoIncrementLiteralExpression(getValueType(), position, blockIndex);
	}
	
	@Override
	public ConstantType getConstantType() {
		return ConstantType.AUTOINCREMENT_LITERAL;
	}

	@Override
	public int getBlockIndex() {
		return blockIndex;
	}

}