jakarta.el.BeanNameResolver Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 jakarta.el;
/**
* Base implementation that provides a minimal default implementation that is intended to be extended by application
* developers.
*
* @since EL 3.0
*/
public abstract class BeanNameResolver {
/**
* Can this resolver resolve the given bean name?
*
* @param beanName The bean name to resolve
*
* @return This default implementation always returns false
*/
public boolean isNameResolved(String beanName) {
return false;
}
/**
* Returns the named bean.
*
* @param beanName The bean name to return
*
* @return This default implementation always returns null
*/
public Object getBean(String beanName) {
return null;
}
/**
* Sets a value of a bean of the given name. If the named bean does not exist and {@link #canCreateBean} returns
* true then a bean is created with the given value.
*
* @param beanName The name of the bean to be set/create
* @param value The value of the bean to set/create
*
* @throws PropertyNotWritableException if the bean is read only
*/
public void setBeanValue(String beanName, Object value) throws PropertyNotWritableException {
throw new PropertyNotWritableException();
}
/**
* Is the named bean read-only?
*
* @param beanName The name of the bean of interest
*
* @return true if the bean is read only, otherwise false
*/
public boolean isReadOnly(String beanName) {
return true;
}
/**
* Is it permitted to create a bean of the given name?
*
* @param beanName The name of the bean of interest
*
* @return true if the bean may be created, otherwise false
*/
public boolean canCreateBean(String beanName) {
return false;
}
}