/*

* 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 javax.el;

import java.lang.reflect.Method;

import java.util.Map;

/**

* @since EL 3.0

*/

public class ELManager {

private StandardELContext context = null;

public static ExpressionFactory getExpressionFactory() {

return Util.getExpressionFactory();

}

public StandardELContext getELContext() {

if (context == null) {

context = new StandardELContext(getExpressionFactory());

}

return context;

}

public ELContext setELContext(ELContext context) {

StandardELContext oldContext = this.context;

this.context = new StandardELContext(context);

return oldContext;

}

public void addBeanNameResolver(BeanNameResolver beanNameResolver) {

getELContext().addELResolver(new BeanNameELResolver(beanNameResolver));

}

public void addELResolver(ELResolver resolver) {

getELContext().addELResolver(resolver);

}

public void mapFunction(String prefix, String function, Method method) {

getELContext().getFunctionMapper().mapFunction(

prefix, function, method);

}

public void setVariable(String variable, ValueExpression expression) {

getELContext().getVariableMapper().setVariable(variable, expression);

}

public void importStatic(String staticMemberName)

throws javax.el.ELException {

getELContext().getImportHandler().importStatic(staticMemberName);

}

public void importClass(String className) throws javax.el.ELException {

getELContext().getImportHandler().importClass(className);

}

public void importPackage(String packageName) {

getELContext().getImportHandler().importPackage(packageName);

}

public Object defineBean(String name, Object bean) {

Map<String,Object> localBeans = getELContext().getLocalBeans();

if (bean == null) {

return localBeans.remove(name);

} else {

return localBeans.put(name, bean);

}

}

public void addEvaluationListener(EvaluationListener listener) {

getELContext().addEvaluationListener(listener);

}

}