EnumRenderer.java

/*
 * Copyright (C) 2009-2011 Open Wide
 * Contact: contact@openwide.fr
 * 
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 * 
 * 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 fr.openwide.core.wicket.more.rendering;

import java.util.Locale;

import org.apache.wicket.Localizer;
import org.apache.wicket.model.Model;
import org.apache.wicket.util.lang.Classes;

import fr.openwide.core.spring.util.StringUtils;

public class EnumRenderer extends Renderer<Enum<?>> {

	private static final long serialVersionUID = -6934415690685574154L;
	
	private static final EnumRenderer INSTANCE = new EnumRenderer();
	
	public static EnumRenderer get() {
		return INSTANCE;
	}
	
	public static EnumRenderer withPrefix(String prefix) {
		return with(prefix, null);
	}
	
	public static EnumRenderer withSuffix(String suffix) {
		return with(null, suffix);
	}
	
	public static EnumRenderer with(String prefix, String suffix) {
		return new EnumRenderer(prefix, suffix);
	}
	
	private String prefix = null;
	
	private String suffix = null;
	
	/**
	 * @deprecated Use the static factory methods instead.
	 */
	@Deprecated
	protected EnumRenderer() { }

	/**
	 * @deprecated Use the static factory methods instead.
	 */
	@Deprecated
	protected EnumRenderer(String prefix, String suffix) {
		this();
		this.prefix = prefix;
		this.suffix = suffix;
	}

	@Override
	public String render(Enum<?> value, Locale locale) {
		if (value == null) {
			return null;
		}
		
		StringBuilder key = new StringBuilder();
		
		if (StringUtils.hasText(prefix)) {
			key.append(prefix).append(".");
		}
		
		key.append(resourceKey(value));
		
		if (StringUtils.hasText(suffix)) {
			key.append(".").append(suffix);
		}
		
		return Localizer.get().getString(key.toString(), null, Model.of(value));
	}

	/**
	 * @deprecated Do not override this.
	 */
	@Deprecated
	protected String resourceKey(Enum<?> value) {
		return Classes.simpleName(value.getDeclaringClass()) + '.' + value.name();
	}

}