/*
* ============================================================================
* GNU Lesser General Public License
* ============================================================================
*
* Beanlet - JSE Application Container.
* Copyright (C) 2006 Leon van Zantvoort
*
* This library 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 library 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
* Leon van Zantvoort
* 243 Acalanes Drive #11
* Sunnyvale, CA 94086
* USA
*
* zantvoort@users.sourceforge.net
* http://beanlet.org
*/
package org.beanlet.impl;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import org.beanlet.BeanletValidationException;
import org.beanlet.Inject;
import org.beanlet.annotation.*;
import org.beanlet.common.AbstractBeanletConfigurationValidator;
import org.beanlet.plugin.BeanletConfiguration;
/**
*
* @author Leon van Zantvoort
*/
public final class InjectBeanletConfigurationValidatorImpl extends
AbstractBeanletConfigurationValidator<Inject> {
public Class<Inject> annotationType() {
return Inject.class;
}
public Class<?>[] getParameterTypes() {
return null;
}
public Class<?> getReturnType() {
return null;
}
public Class<?>[] getExceptionTypes() {
return null;
}
public int getRequiredModifiers() {
return 0;
}
public int getInvalidModifiers() {
return 0;
}
public boolean isBeanletTypeRequired() {
return false;
}
public boolean validate(BeanletConfiguration configuration,
Element element) throws BeanletValidationException {
AnnotationDomain domain = configuration.getAnnotationDomain();
switch (element.getElementType()) {
case CONSTRUCTOR:
Constructor c = ((ConstructorElement) element).getConstructor();
if (c.getParameterTypes().length == 0) {
throw new BeanletValidationException(configuration.getComponentName(),
"Constructor specifies zero parameters. Use @StaticFactory instead: '" + c + "'.");
}
if (c.getParameterTypes().length > 1) {
throw new BeanletValidationException(configuration.getComponentName(),
"Constructor specifies multiple parameters, define @Inject at constructor parameters instead: '" + c + "'.");
}
break;
case METHOD:
Method m = ((MethodElement) element).getMethod();
if (Modifier.isStatic(m.getModifiers())) {
if (m.getParameterTypes().length == 0) {
throw new BeanletValidationException(configuration.getComponentName(),
"Static factory method specifies zero parameters. Use @StaticFactory instead: '" + m + "'.");
}
if (m.getParameterTypes().length > 1) {
throw new BeanletValidationException(configuration.getComponentName(),
"Static factory method specifies multiple parameters, define @Inject at method parameters instead: '" + m + "'.");
}
if (m.getReturnType().equals(Void.TYPE)) {
throw new BeanletValidationException(configuration.getComponentName(),
"Static factory method MUST specify a return type: '" + m + "'.");
}
} else {
if (m.getParameterTypes().length == 0) {
throw new BeanletValidationException(configuration.getComponentName(),
"Zero argument method not supported for @Inject: '" + m + "'.");
}
if (m.getParameterTypes().length != 1) {
throw new BeanletValidationException(configuration.getComponentName(),
"Method specifies multiple parameters. Define @Inject at method parameters instead: '" + m + "'.");
}
}
break;
case FIELD:
Field f = ((FieldElement) element).getField();
if (Modifier.isStatic(f.getModifiers())) {
throw new BeanletValidationException(configuration.getComponentName(),
"Static factory field not supported for @Inject. Use @StaticFactory instead: '" + f + "'.");
} else {
if (Modifier.isFinal(f.getModifiers())) {
// Disallowed, although it is supported by reflection.
throw new BeanletValidationException(configuration.getComponentName(),
"Non static field MUST not be final: '" + f + "'.");
}
}
break;
case PARAMETER:
if (element instanceof MethodElement) {
Method pm = ((MethodParameterElement) element).getMethod();
if (Modifier.isStatic(pm.getModifiers())) {
if (pm.getReturnType().equals(Void.TYPE)) {
throw new BeanletValidationException(configuration.getComponentName(),
"Static factory method MUST specify a return type: '" + pm + "'.");
}
}
}
break;
}
return true;
}
}