And If you can't extend from that class then you can write adapter for that class. Something like this
Using in a JSP page: [code] <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core"; %> <jsp:useBean id="Constants" class="com.utils.JSTLMyConstants"/> <c:out value="${Constants.name <http://Constants.name>}"/><br> <c:out value="${Constants.age}"/> <c:forEach var="day" items="${Constants.daysOfTheWeek}"> <c:out value="${day}"/> </c:forEach> [/code] Where adapter class is [code] package com.utils; import java.lang.reflect.Field; import java.lang.reflect.Modifier; import java.util.HashMap; import java.util.Map; /** * Class to reveal java constants to JSTL Expression Language * Uses reflection to scan the declared fields of a Constants class * Adds these fields to the Map. * Map is unmodifiable after initialization. */ public class JSTLMyConstants extends HashMap { private boolean initialised = false; private static final Class adaptee = MyConstant.class; public JSTLMyConstants() { Class c = adaptee; Field[] fields = c.getDeclaredFields(); for (int i = 0; i < fields.length; i++) { Field field = fields[i]; int modifier = field.getModifiers(); if (Modifier.isFinal(modifier) && !Modifier.isPrivate(modifier)) try { this.put(field.getName(), field.get(this)); } catch (IllegalAccessException e) {} } initialised = true; } public void clear() { if (!initialised) super.clear(); else throw new UnsupportedOperationException("Cannot modify this map"); } public Object put(Object key, Object value) { if (!initialised) return super.put(key, value); else throw new UnsupportedOperationException("Cannot modify this map"); } public void putAll(Map m) { if (!initialised) super.putAll(m); else throw new UnsupportedOperationException("Cannot modify this map"); } public Object remove(Object key) { if (!initialised) return super.remove(key); else throw new UnsupportedOperationException("Cannot modify this map"); } } [/code] // Main constant class [code] package com.utils; public interface MyConstant { public static final int age = 30; public static final String name = "Sudhaker Raj"; public static final String programmingSkill = "Awesome"; public static final String[] daysOfTheWeek = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun" }; } [/code] Hope this helps. On 8/30/05, Luca Passani <[EMAIL PROTECTED]> wrote: > > Sudhaker Raj wrote: > > >You may want to see this - > > > >http://forums.java.sun.com/thread.jspa?threadID=508847&messageID=2543490 > > > > > very smart. A bit overkill for my problem, but very smart... > > Thanks > > Luca > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Cheers, Sudhaker Raj http://thej2ee.com
