Spring Framework example source code file (PrioritizedParameterNameDiscovererTests.java)

This example Spring Framework source code file (PrioritizedParameterNameDiscovererTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

class, foo_bar, method, nosuchmethodexception, parameternamediscoverer, parameternamediscoverer, prioritizedparameternamediscoverer, prioritizedparameternamediscoverer, prioritizedparameternamediscoverertests, reflection, something_else, something_else, string, string, testcase, util

The Spring Framework PrioritizedParameterNameDiscovererTests.java source code

/*
 * Copyright 2002-2006 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.core;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.Arrays;

import junit.framework.TestCase;

import org.springframework.beans.TestBean;

public class PrioritizedParameterNameDiscovererTests extends TestCase {
	
	private static final String[] FOO_BAR = new String[] { "foo", "bar" };
	
	private static final String[] SOMETHING_ELSE = new String[] { "something", "else" };
	
	ParameterNameDiscoverer returnsFooBar = new ParameterNameDiscoverer() {
		public String[] getParameterNames(Method m) {
			return FOO_BAR;
		}
		public String[] getParameterNames(Constructor ctor) {
			return FOO_BAR;
		}
	};
	
	ParameterNameDiscoverer returnsSomethingElse = new ParameterNameDiscoverer() {
		public String[] getParameterNames(Method m) {
			return SOMETHING_ELSE;
		}
		public String[] getParameterNames(Constructor ctor) {
			return SOMETHING_ELSE;
		}
	};
	
	private final Method anyMethod;
	private final Class anyClass = Object.class;
	
	public PrioritizedParameterNameDiscovererTests() throws SecurityException, NoSuchMethodException {
		anyMethod = TestBean.class.getMethod("getAge", (Class[]) null);
	}
	
	public void testNoParametersDiscoverers() {
		ParameterNameDiscoverer pnd = new PrioritizedParameterNameDiscoverer();
		assertNull(pnd.getParameterNames(anyMethod));
		assertNull(pnd.getParameterNames((Constructor) null));
	}
	
	public void testOrderedParameterDiscoverers1() {
		PrioritizedParameterNameDiscoverer pnd = new PrioritizedParameterNameDiscoverer();
		pnd.addDiscoverer(returnsFooBar);
		assertTrue(Arrays.equals(FOO_BAR, pnd.getParameterNames(anyMethod)));
		assertTrue(Arrays.equals(FOO_BAR, pnd.getParameterNames((Constructor) null)));
		pnd.addDiscoverer(returnsSomethingElse);
		assertTrue(Arrays.equals(FOO_BAR, pnd.getParameterNames(anyMethod)));
		assertTrue(Arrays.equals(FOO_BAR, pnd.getParameterNames((Constructor) null)));
	}
	
	public void testOrderedParameterDiscoverers2() {
		PrioritizedParameterNameDiscoverer pnd = new PrioritizedParameterNameDiscoverer();
		pnd.addDiscoverer(returnsSomethingElse);
		assertTrue(Arrays.equals(SOMETHING_ELSE, pnd.getParameterNames(anyMethod)));
		assertTrue(Arrays.equals(SOMETHING_ELSE, pnd.getParameterNames((Constructor) null)));
		pnd.addDiscoverer(returnsFooBar);
		assertTrue(Arrays.equals(SOMETHING_ELSE, pnd.getParameterNames(anyMethod)));
		assertTrue(Arrays.equals(SOMETHING_ELSE, pnd.getParameterNames((Constructor) null)));
	}

}