// $Id: FilterHelper.java 9908 2006-05-08 20:59:20Z max.andersen@jboss.com $package org.hibernate.util;import org.hibernate.sql.Template;import org.hibernate.impl.FilterImpl;import org.hibernate.dialect.Dialect;import org.hibernate.dialect.function.SQLFunctionRegistry;import java.util.Map;import java.util.Iterator;/** * Implementation of FilterHelper. * * @author Steve Ebersole */public class FilterHelper {	private final String[] filterNames;	private final String[] filterConditions;	/**	 * The map of defined filters.  This is expected to be in format	 * where the filter names are the map keys, and the defined	 * conditions are the values.	 *	 * @param filters The map of defined filters.	 * @param dialect The sql dialect	 * @param functionRegistry The SQL function registry	 */	public FilterHelper(Map filters, Dialect dialect, SQLFunctionRegistry functionRegistry) {		int filterCount = filters.size();		filterNames = new String[filterCount];		filterConditions = new String[filterCount];		Iterator iter = filters.entrySet().iterator();		filterCount = 0;		while ( iter.hasNext() ) {			final Map.Entry entry = (Map.Entry) iter.next();			filterNames[filterCount] = (String) entry.getKey();			filterConditions[filterCount] = Template.renderWhereStringTemplate(					(String) entry.getValue(),					FilterImpl.MARKER,					dialect,					functionRegistry				);			filterConditions[filterCount] = StringHelper.replace( filterConditions[filterCount],					":",					":" + filterNames[filterCount] + "." );			filterCount++;		}	}	public boolean isAffectedBy(Map enabledFilters) {		for ( int i = 0, max = filterNames.length; i < max; i++ ) {			if ( enabledFilters.containsKey( filterNames[i] ) ) {				return true;			}		}		return false;	}	public String render(String alias, Map enabledFilters) {		StringBuffer buffer = new StringBuffer();		render( buffer, alias, enabledFilters );		return buffer.toString();	}	public void render(StringBuffer buffer, String alias, Map enabledFilters) {		if ( filterNames != null && filterNames.length > 0 ) {			for ( int i = 0, max = filterNames.length; i < max; i++ ) {				if ( enabledFilters.containsKey( filterNames[i] ) ) {					final String condition = filterConditions[i];					if ( StringHelper.isNotEmpty( condition ) ) {						buffer.append( " and " )								.append( StringHelper.replace( condition, FilterImpl.MARKER, alias ) );					}				}			}		}	}}