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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Middleware LLC.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 *
 */
package org.hibernate.persister.entity;

import java.util.HashMap;
import java.util.Map;

import org.hibernate.MappingException;
import org.hibernate.QueryException;
import org.hibernate.engine.spi.Mapping;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.internal.util.StringHelper;
import org.hibernate.internal.util.collections.ArrayHelper;
import org.hibernate.sql.Template;
import org.hibernate.type.AssociationType;
import org.hibernate.type.CompositeType;
import org.hibernate.type.EntityType;
import org.hibernate.type.Type;

import org.jboss.logging.Logger;

/**
 * Basic implementation of the {@link PropertyMapping} contract.
 *
 * @author Gavin King
 */
public abstract class AbstractPropertyMapping implements PropertyMapping {

    private static final CoreMessageLogger LOG = Logger.getMessageLogger(CoreMessageLogger.class,
                                                                       AbstractPropertyMapping.class.getName());

	private final Map typesByPropertyPath = new HashMap();
	private final Map columnsByPropertyPath = new HashMap();
	private final Map columnReadersByPropertyPath = new HashMap();
	private final Map columnReaderTemplatesByPropertyPath = new HashMap();
	private final Map formulaTemplatesByPropertyPath = new HashMap();

	public String[] getIdentifierColumnNames() {
		throw new UnsupportedOperationException("one-to-one is not supported here");
	}

	public String[] getIdentifierColumnReaderTemplates() {
		throw new UnsupportedOperationException("one-to-one is not supported here");
	}

	public String[] getIdentifierColumnReaders() {
		throw new UnsupportedOperationException("one-to-one is not supported here");
	}

	protected abstract String getEntityName();

	public Type toType(String propertyName) throws QueryException {
		Type type = (Type) typesByPropertyPath.get(propertyName);
		if ( type == null ) {
			throw propertyException( propertyName );
		}
		return type;
	}

	protected final QueryException propertyException(String propertyName) throws QueryException {
		return new QueryException( "could not resolve property: " + propertyName + " of: " + getEntityName() );
	}

	public String[] getColumnNames(String propertyName) {
		String[] cols = (String[]) columnsByPropertyPath.get(propertyName);
		if (cols==null) {
			throw new MappingException("unknown property: " + propertyName);
		}
		return cols;
	}

	public String[] toColumns(String alias, String propertyName) throws QueryException {
		//TODO: *two* hashmap lookups here is one too many...
		String[] columns = (String[]) columnsByPropertyPath.get(propertyName);
		if ( columns == null ) {
			throw propertyException( propertyName );
		}
		String[] formulaTemplates = (String[]) formulaTemplatesByPropertyPath.get(propertyName);
		String[] columnReaderTemplates = (String[]) columnReaderTemplatesByPropertyPath.get(propertyName);
		String[] result = new String[columns.length];
		for ( int i=0; i