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/**
 *  Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
 *
 *  Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
 *
 *  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.tinygroup.tinydb.dialect.impl;

import org.springframework.dao.DataAccessException;
import org.tinygroup.database.dialectfunction.DialectFunctionProcessor;
import org.tinygroup.database.dialectfunction.impl.DialectFunctionProcessorImpl;
import org.tinygroup.tinydb.dialect.Dialect;

import javax.sql.DataSource;

public abstract class AbstractDialect implements Dialect {
	
	protected DialectFunctionProcessor functionProcessor=new DialectFunctionProcessorImpl();
	
	private DataSource dataSource;

	private String incrementerName;

	protected int paddingLength = 0;
	

	public boolean supportsLimit() {
		return false;
	}

	/**
	 * Set the data source to retrieve the value from.
	 */
	public void setDataSource(DataSource dataSource) {
		this.dataSource = dataSource;
	}

	/**
	 * Return the data source to retrieve the value from.
	 */
	public DataSource getDataSource() {
		return this.dataSource;
	}

	/**
	 * Set the name of the sequence/table.
	 */
	public void setIncrementerName(String incrementerName) {
		this.incrementerName = incrementerName;
	}

	/**
	 * Return the name of the sequence/table.
	 */
	public String getIncrementerName() {
		return this.incrementerName;
	}

	/**
	 * Set the padding length, i.e. the length to which a string result
	 * should be pre-pended with zeroes.
	 */
	public void setPaddingLength(int paddingLength) {
		this.paddingLength = paddingLength;
	}

	/**
	 * Return the padding length for String values.
	 */
	public int getPaddingLength() {
		return this.paddingLength;
	}
	
	public int nextIntValue() throws DataAccessException {
		return getNextKey();
	}

	public long nextLongValue() throws DataAccessException {
		return getNextKey();
	}

	public String nextStringValue() throws DataAccessException {
		String s = Long.toString(getNextKey());
		int len = s.length();
		if (len < this.paddingLength) {
			StringBuffer buf = new StringBuffer(this.paddingLength);
			for (int i = 0; i < this.paddingLength - len; i++) {
				buf.append('0');
			}
			buf.append(s);
			s = buf.toString();
		}
		return s;
	}
	
	public DialectFunctionProcessor getFunctionProcessor() {
		return functionProcessor;
	}
	public void setFunctionProcessor(DialectFunctionProcessor functionProcessor) {
		this.functionProcessor = functionProcessor;
	}

}