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/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2009 Jaspersoft Corporation. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports 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 Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with JasperReports. If not, see .
 */
package net.sf.jasperreports.engine.query;

import net.sf.jasperreports.engine.JRValueParameter;


/**
 * A query clause handling context, as seen from a {@link JRClauseFunction clause function}.
 * 
 * @author Lucian Chirita ([email protected])
 * @version $Id: JRQueryClauseContext.java 3034 2009-08-27 11:58:04Z teodord $
 */
public interface JRQueryClauseContext
{

	/**
	 * Returns the query text buffer.
	 * 
	 * @return the query text buffer
	 */
	StringBuffer queryBuffer();
	
	/**
	 * Return a value parameter from the report parameters map.
	 * 
	 * @param parameterName the parameter name
	 * @return the parameter
	 */
	JRValueParameter getValueParameter(String parameterName);
	
	/**
	 * Records a query parameter.
	 * 
	 * @param parameterName the parameter name
	 */
	void addQueryParameter(String parameterName);
	
	/**
	 * Records a multi-valued query parameter.
	 * 
	 * @param parameterName the parameter name
	 * @param count the value count
	 */
	void addQueryMultiParameters(String parameterName, int count);

}




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