/*
* Copyright 2017 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.integration.expression;
import java.util.HashMap;
import java.util.Map;
import org.springframework.expression.PropertyAccessor;
import org.springframework.util.Assert;
/**
* Utility class that keeps track of a Set of SpEL {@link PropertyAccessor}s
* in order to register them with the "integrationEvaluationContext" upon initialization.
* Accessors must be added before context refresh.
*
* @author Artem Bilan
* @author Gary Russell
*
* @since 3.0
*/
public class SpelPropertyAccessorRegistrar {
private final Map<String, PropertyAccessor> propertyAccessors = new HashMap<String, PropertyAccessor>();
public SpelPropertyAccessorRegistrar() {
}
/**
* Create an instance with the provided property accessors. Each accessor name
* will be the class simple name.
* @param propertyAccessors the accessors.
* @since 4.3.8
*/
public SpelPropertyAccessorRegistrar(PropertyAccessor... propertyAccessors) {
Assert.notEmpty(propertyAccessors, "'propertyAccessors' must not be empty");
for (PropertyAccessor propertyAccessor : propertyAccessors) {
this.propertyAccessors.put(propertyAccessors.getClass().getSimpleName(), propertyAccessor);
}
}
/**
* Create an instance with the provided named property accessors.
* @param propertyAccessors a map of name:accessor.
* @since 4.3.8
*/
public SpelPropertyAccessorRegistrar(Map<String, PropertyAccessor> propertyAccessors) {
Assert.notEmpty(propertyAccessors, "'propertyAccessors' must not be empty");
this.propertyAccessors.putAll(propertyAccessors);
}
/**
* Return the registered accessors.
* @return the map of name:accessor.
* @since 4.3.8
*/
public Map<String, PropertyAccessor> getPropertyAccessors() {
return this.propertyAccessors;
}
/**
* Add the provided named property accessor.
* @param name the name.
* @param propertyAccessor the accessor.
* @return this registrar.
* @since 4.3.8
*/
public SpelPropertyAccessorRegistrar add(String name, PropertyAccessor propertyAccessor) {
Assert.hasText(name, "'name' must not be empty");
Assert.notNull(propertyAccessor, "'propertyAccessor' must not be null");
this.propertyAccessors.put(name, propertyAccessor);
return this;
}
/**
* Add the provided property accessors. Each accessor name
* will be the class simple name.
* @param propertyAccessors the accessors.
* @return this registrar.
* @since 4.3.8
*/
public SpelPropertyAccessorRegistrar add(PropertyAccessor... propertyAccessors) {
Assert.notEmpty(propertyAccessors, "'propertyAccessors' must not be empty");
for (PropertyAccessor propertyAccessor : propertyAccessors) {
this.propertyAccessors.put(propertyAccessors.getClass().getSimpleName(), propertyAccessor);
}
return this;
}
}