com.sun.faces.config.Verifier Maven / Gradle / Ivy
/*
* $Id: Verifier.java,v 1.1 2007/05/21 19:59:38 rlubke Exp $
*/
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.faces.config;
import com.sun.faces.RIConstants;
import com.sun.faces.util.MessageUtils;
import com.sun.faces.util.Util;
import java.lang.reflect.Constructor;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
/**
*
* This class backs the com.sun.faces.verifyObjects
* feature which provides basic validation of Components,
* Converters, and Validators.
*
*/
public class Verifier {
/**
* Thread local to share the Verifier.
*/
private static final ThreadLocal VERIFIER =
new ThreadLocal();
/**
* Represent the current Faces object types we validate.
*/
public enum ObjectType {
COMPONENT,
CONVERTER,
VALIDATOR,
}
/**
* Container for any messages that may be queued.
*/
private List messages;
// ------------------------------------------------------- Constructors
/**
* Construct a new Verifier instance.
*/
Verifier() {
messages = new ArrayList(4);
}
// ------------------------------------------------- Public Methods
/**
* @return a Verifier for the current web application
* if com.sun.faces.verifyObjects is enabled
*/
public static Verifier getCurrentInstance() {
return VERIFIER.get();
}
/**
* Set the Verifier for this thread (typically the
* same thread that is used to bootstrap the application).
* @param verifier the Verifier for this web application
*/
public static void setCurrentInstance(Verifier verifier) {
VERIFIER.set(verifier);
}
/**
* @return true if no messages were queued by the
* validation process
*/
public boolean isApplicationValid() {
return (messages.isEmpty());
}
/**
* @return a List of all failures found
*/
public List getMessages() {
return messages;
}
/**
* Validate the specified faces object by:
*
* -
* Ensure the class can be found and loaded
*
* -
* Ensure the object has a public, no-argument constructor
*
*
* Ensure the object is an instance of the class represented
* by assignableTo
*
* If any of these tests fail, queue a message to be displayed at a
* later point in time.
* @param type The type of Faces object we're validating
* @param className the class name of the Faces object we're validating
* @param assignableTo the type we expect className to
* either implement or extend
*/
public void validateObject(ObjectType type, String className, Class assignableTo) {
Class c = null;
try {
c = Util.loadClass(className, this);
} catch (ClassNotFoundException cnfe) {
messages.add(MessageUtils.getExceptionMessageString(
MessageUtils.VERIFIER_CLASS_NOT_FOUND_ID,
type,
className));
} catch (NoClassDefFoundError ncdfe) {
messages.add(MessageUtils.getExceptionMessageString(
MessageUtils.VERIFIER_CLASS_MISSING_DEP_ID,
type,
className,
ncdfe.getMessage()));
}
if (c != null) {
try {
Constructor ctor = c.getConstructor(RIConstants.EMPTY_CLASS_ARGS);
if (!Modifier.isPublic(ctor.getModifiers())) {
messages.add(MessageUtils.getExceptionMessageString(
MessageUtils.VERIFIER_CTOR_NOT_PUBLIC_ID,
type,
className));
}
} catch (NoSuchMethodException nsme) {
messages.add(MessageUtils.getExceptionMessageString(
MessageUtils.VERIFIER_NO_DEF_CTOR_ID,
type,
className));
}
if (!assignableTo.isAssignableFrom(c)) {
messages.add(MessageUtils.getExceptionMessageString(
MessageUtils.VERIFIER_WRONG_TYPE_ID,
type,
className));
}
}
}
}