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Jetty example source code file (TestIntrospectionUtil.java)

This example Jetty source code file (TestIntrospectionUtil.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 - Jetty tags/keywords

class, exception, exception, field, field, integer, integer, method, method, private, reflection, servleta, servletc, string, testintrospectionutil

The Jetty TestIntrospectionUtil.java source code

//========================================================================
//$Id: TestIntrospectionUtil.java 1448 2006-12-29 20:46:57Z janb $
//Copyright 2006 Mort Bay Consulting Pty. Ltd.
//------------------------------------------------------------------------
//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.mortbay.util;

import java.lang.reflect.Field;
import java.lang.reflect.Method;


import junit.framework.TestCase;

/**
 * TestInjection
 *
 *
 */
public class TestIntrospectionUtil extends TestCase
{
    public final Class[] __INTEGER_ARG = new Class[] {Integer.class};
    Field privateAField;
    Field protectedAField;
    Field publicAField;
    Field defaultAField;
    Field privateBField;
    Field protectedBField;
    Field publicBField;
    Field defaultBField;
    Method privateCMethod;
    Method protectedCMethod;
    Method publicCMethod;
    Method defaultCMethod;
    Method privateDMethod;
    Method protectedDMethod;
    Method publicDMethod;
    Method defaultDMethod;
    
    public class ServletA 
    {
        private Integer privateA; 
        protected Integer protectedA;
        Integer defaultA;
        public Integer publicA;
    }
    
    public class ServletB extends ServletA
    {
        private String privateB;
        protected String protectedB;
        public String publicB;
        String defaultB;
    }
    
    public class ServletC
    {
        private void setPrivateC (Integer c) {}      
        protected void setProtectedC (Integer c) {}
        public void setPublicC(Integer c) {}
        void setDefaultC(Integer c) {}
    }
    
    public class ServletD extends ServletC
    {
        private void setPrivateD(Integer d) {}
        protected void setProtectedD(Integer d) {}
        public void setPublicD(Integer d) {}
        void setDefaultD(Integer d) {}
    }
    
    public void setUp()
    throws Exception
    {
        privateAField = ServletA.class.getDeclaredField("privateA");
        protectedAField = ServletA.class.getDeclaredField("protectedA");
        publicAField = ServletA.class.getDeclaredField("publicA");
        defaultAField = ServletA.class.getDeclaredField("defaultA");
        privateBField = ServletB.class.getDeclaredField("privateB");
        protectedBField = ServletB.class.getDeclaredField("protectedB");
        publicBField = ServletB.class.getDeclaredField("publicB");
        defaultBField = ServletB.class.getDeclaredField("defaultB");
        privateCMethod = ServletC.class.getDeclaredMethod("setPrivateC", __INTEGER_ARG);
        protectedCMethod = ServletC.class.getDeclaredMethod("setProtectedC", __INTEGER_ARG);
        publicCMethod = ServletC.class.getDeclaredMethod("setPublicC", __INTEGER_ARG);
        defaultCMethod = ServletC.class.getDeclaredMethod("setDefaultC", __INTEGER_ARG);
        privateDMethod = ServletD.class.getDeclaredMethod("setPrivateD", __INTEGER_ARG); 
        protectedDMethod = ServletD.class.getDeclaredMethod("setProtectedD", __INTEGER_ARG);
        publicDMethod = ServletD.class.getDeclaredMethod("setPublicD", __INTEGER_ARG);
        defaultDMethod = ServletD.class.getDeclaredMethod("setDefaultD", __INTEGER_ARG);
    }
   
    
    public void testFieldPrivate ()
    throws Exception
    {
        //direct
        Field f = IntrospectionUtil.findField(ServletA.class, "privateA", Integer.class, true, false);
        assertEquals(privateAField,f);

        //inheritance
        try
        {
            IntrospectionUtil.findField(ServletB.class, "privateA", Integer.class, true, false);
            fail("Private fields should not be inherited");
        }
        catch (NoSuchFieldException e)
        {
            //expected
        }
    }
    
    public void testFieldProtected()    
    throws Exception
    {
        //direct
        Field f = IntrospectionUtil.findField(ServletA.class, "protectedA", Integer.class, true, false);
        assertEquals(f, protectedAField);
        
        //inheritance
        f = IntrospectionUtil.findField(ServletB.class, "protectedA", Integer.class, true, false);
        assertEquals(f, protectedAField);
    }
    
    public void testFieldPublic()
    throws Exception
    {
        //direct
        Field f = IntrospectionUtil.findField(ServletA.class, "publicA", Integer.class, true, false);
        assertEquals(f, publicAField);
        
        //inheritance
        f = IntrospectionUtil.findField(ServletB.class, "publicA", Integer.class, true, false);
        assertEquals(f, publicAField);
    }
    
    public void testFieldDefault()
    throws Exception
    {
        //direct
        Field f = IntrospectionUtil.findField(ServletA.class, "defaultA", Integer.class, true, false);
        assertEquals(f, defaultAField);
        
        //inheritance
        f = IntrospectionUtil.findField(ServletB.class, "defaultA", Integer.class, true, false);
        assertEquals(f, defaultAField);
    }
    
    public void testMethodPrivate ()
    throws Exception
    {
        //direct
        Method m = IntrospectionUtil.findMethod(ServletC.class, "setPrivateC", __INTEGER_ARG, true, false);
        assertEquals(m, privateCMethod);
        
        //inheritance
        try
        {
            IntrospectionUtil.findMethod(ServletD.class, "setPrivateC", __INTEGER_ARG, true, false);
            fail();
        }
        catch (NoSuchMethodException e)
        {
            //expected
        }
    }
    
    public void testMethodProtected ()
    throws Exception
    {
        // direct
        Method m = IntrospectionUtil.findMethod(ServletC.class, "setProtectedC", __INTEGER_ARG, true, false);
        assertEquals(m, protectedCMethod);
        
        //inherited
        m = IntrospectionUtil.findMethod(ServletD.class, "setProtectedC", __INTEGER_ARG, true, false);
        assertEquals(m, protectedCMethod);
    }
    
    public void testMethodPublic ()
    throws Exception
    {
        // direct
        Method m = IntrospectionUtil.findMethod(ServletC.class, "setPublicC",  __INTEGER_ARG, true, false);
        assertEquals(m, publicCMethod);
        
        //inherited
       m = IntrospectionUtil.findMethod(ServletD.class, "setPublicC",  __INTEGER_ARG, true, false);
       assertEquals(m, publicCMethod);
    }
    
    public void testMethodDefault ()
    throws Exception
    {
        // direct
        Method m = IntrospectionUtil.findMethod(ServletC.class, "setDefaultC", __INTEGER_ARG, true, false);
        assertEquals(m, defaultCMethod);
        
        //inherited
        m = IntrospectionUtil.findMethod(ServletD.class, "setDefaultC", __INTEGER_ARG, true, false);
        assertEquals(m, defaultCMethod);
    }
}

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