Author: julien(a)jboss.com Date: 2007-06-14 18:06:47 -0400 (Thu, 14 Jun 2007) New Revision: 7426 Added: trunk/faces/src/main/org/jboss/portal/faces/el/ClassConstantPublisherBean.java Log: implemented a dynamic bean which allow to access class constant fields in EL Added: trunk/faces/src/main/org/jboss/portal/faces/el/ClassConstantPublisherBean.java =================================================================== --- trunk/faces/src/main/org/jboss/portal/faces/el/ClassConstantPublisherBean.java (rev 0) +++ trunk/faces/src/main/org/jboss/portal/faces/el/ClassConstantPublisherBean.java 2007-06-14 22:06:47 UTC (rev 7426) @@ -0,0 +1,110 @@ +/****************************************************************************** + * JBoss, a division of Red Hat * + * Copyright 2006, Red Hat Middleware, LLC, and individual * + * contributors as indicated by the @authors tag. See the * + * copyright.txt in the distribution for a full listing of * + * individual contributors. * + * * + * This 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 2.1 of * + * the License, or (at your option) any later version. * + * * + * This software 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 software; if not, write to the Free * + * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * + * 02110-1301 USA, or see the FSF site: http://www.fsf.org. * + ******************************************************************************/ +package org.jboss.portal.faces.el; + +import org.jboss.portal.faces.el.dynamic.DynamicBean; + +import java.util.Map; +import java.util.HashMap; +import java.lang.reflect.Field; +import java.lang.reflect.Modifier; + +/** + * @author <a href="mailto:julien@jboss.org">Julien Viet</a> + * @version $Revision: 1.1 $ + */ +public class ClassConstantPublisherBean implements DynamicBean +{ + + /** . */ + private String className; + + /** . */ + private volatile Map entries; + + private Map getEntries() + { + if (entries == null) + { + try + { + Map entries = new HashMap(); + Class clazz = Thread.currentThread().getContextClassLoader().loadClass(className); + Field[] fields = clazz.getFields(); + for (int i = 0; i < fields.length; i++) + { + Field field = fields[i]; + int modifiers = field.getModifiers(); + if ((modifiers & Modifier.STATIC | modifiers & Modifier.PUBLIC) != 0) + { + Object value = field.get(null); + entries.put(field.getName(), value); + } + } + this.entries = entries; + } + catch (ClassNotFoundException e) + { + e.printStackTrace(); + } + catch (IllegalAccessException e) + { + e.printStackTrace(); + } + } + return entries; + } + + public Class getType(Object propertyName) throws IllegalArgumentException + { + Map entries = getEntries(); + Object value = entries.get(propertyName); + return value != null ? value.getClass() : null; + } + + public PropertyValue getValue(Object propertyName) throws IllegalArgumentException + { + if ("className".equals(propertyName)) + { + return new PropertyValue(className); + } + + // + Map entries = getEntries(); + Object value = entries.get(propertyName); + return new PropertyValue(value); + } + + public boolean setValue(Object propertyName, Object value) throws IllegalArgumentException + { + if ("className".equals(propertyName)) + { + this.className = (String)value; + return true; + } + else + { + return false; + } + } +}