/*
* Copyright 2013-2016 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.amqp.utils.test;
import org.springframework.beans.DirectFieldAccessor;
import org.springframework.util.Assert;
/**
* See Spring Integration TestUtils.
* @author Mark Fisher
* @author Iwein Fuld
* @author Oleg Zhurakousky
* @author Gary Russell
* @since 1.2
*/
public final class TestUtils {
private TestUtils() {
super();
}
/**
* Uses nested {@link DirectFieldAccessor}s to obtain a property using dotted notation to traverse fields; e.g.
* "foo.bar.baz" will obtain a reference to the baz field of the bar field of foo. Adopted from Spring Integration.
* @param root The object.
* @param propertyPath The path.
* @return The field.
*/
public static Object getPropertyValue(Object root, String propertyPath) {
Object value = null;
DirectFieldAccessor accessor = new DirectFieldAccessor(root);
String[] tokens = propertyPath.split("\\.");
for (int i = 0; i < tokens.length; i++) {
value = accessor.getPropertyValue(tokens[i]);
if (value != null) {
accessor = new DirectFieldAccessor(value);
}
else if (i == tokens.length - 1) {
return null;
}
else {
throw new IllegalArgumentException("intermediate property '" + tokens[i] + "' is null");
}
}
return value;
}
@SuppressWarnings("unchecked")
public static <T> T getPropertyValue(Object root, String propertyPath, Class<T> type) {
Object value = getPropertyValue(root, propertyPath);
if (value != null) {
Assert.isAssignable(type, value.getClass());
}
return (T) value;
}
}