/*
* Copyright 2004-2008 the original author or authors.
*
* Licensed 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 org.springframework.binding.expression.el;
import javax.el.ELContext;
import javax.el.ELResolver;
/**
* A factory for creating a EL context object that will be used to evaluate a target object of an EL expression.
*
* Note this ELContextFactory is not used at parse time, only evaluation time. Therefore, factories should not be
* concerned with setting up parse-time context attributes such as the variable mapper and function mapper that play no
* part during expression evaluation.
*
* @author Keith Donald
* @author Jeremy Grelle
*/
public interface ELContextFactory {
/**
* Configures and returns an {@link ELContext} to be used in evaluating EL expressions on the given base target
* object. In certain environments the target will be null and the base object of the expression is expected to be
* resolved via the ELContext's {@link ELResolver} chain.
* @param target The base object for the expression evaluation
* @return ELContext The configured ELContext instance for evaluating expressions.
*/
public ELContext getELContext(Object target);
}