/*
 * (c) Copyright 2008-2010 by Volker Bergmann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted under the terms of the
 * GNU General Public License.
 *
 * For redistributing this software or a derivative work under a license other
 * than the GPL-compatible Free Software License as defined by the Free
 * Software Foundation or approved by OSI, you must first obtain a commercial
 * license to this software product from Volker Bergmann.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
 * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
 * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package org.databene.domain.address;

import java.io.IOException;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

import org.databene.commons.ConfigurationError;
import org.databene.commons.Context;
import org.databene.commons.IOUtil;
import org.databene.commons.context.DefaultContext;
import org.databene.commons.converter.UnsafeConverter;
import org.databene.script.Script;
import org.databene.script.ScriptException;
import org.databene.script.freemarker.FreeMarkerScriptFactory;

/**
 * Formats Address objects as String.<br/>
 * <br/>
 * Created: 06.04.2008 14:15:25
 * @author Volker Bergmann
 */
public class AddressFormat {
	
	private static final String CONFIG_FILE = "/org/databene/domain/address/addressFormat.properties";

	static final Map<String, AddressFormat> instances = new HashMap<String, AddressFormat>();
	
    private static final FreeMarkerScriptFactory SCRIPT_FACTORY = new FreeMarkerScriptFactory();
    
    public static AddressFormat US = getInstance("US");
    public static AddressFormat AU = getInstance("AU");
    public static AddressFormat DE = getInstance("DE");
    public static AddressFormat BE = getInstance("BE");
    
	private String pattern;
	private Script script;

	public AddressFormat(String pattern) {
		this.pattern = pattern;
		script = SCRIPT_FACTORY.parseText(pattern);
	}
	
	@SuppressWarnings("rawtypes")
	public static AddressFormat getInstance(String country) {
		if (instances.size() == 0) {
			try {
				IOUtil.readProperties(CONFIG_FILE, new UnsafeConverter<Map.Entry, Map.Entry>(Map.Entry.class, Map.Entry.class) {
                    public Entry convert(Entry entry) {
						String pt = (String) entry.getValue();
						instances.put((String) entry.getKey(), new AddressFormat(pt));
						return entry;
					}
				});
			} catch (IOException e) {
				throw new ConfigurationError("Error while processing AddressFormat configuration", e);
			}
		}
		return instances.get(country);
	}

	public String getPattern() {
		return pattern;
	}

	public String format(Address address) {
		try {
			Context context = new DefaultContext();
			context.set("address", address);
			StringWriter out = new StringWriter();
			script.execute(context, out);
			return out.toString();
		} catch (IOException e) {
			throw new ScriptException("Error during script processing", e);
		}
	}
	
}