Java example source code file (CheckMethods.java)

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

Learn more about this Java project at its project page.

Java - Java tags/keywords

arraylist, checkmethods, class, field, https, httpsurlconnectionimpl, httpsurlconnectionoldimpl, iterator, method, methodsignature, net, network, non, public, reflection, runtimeexception, string, stringbuffer, util

The CheckMethods.java Java example source code

/*
 * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @bug 4423074
 * @summary Need to rebase all the duplicated classes from Merlin.
 *          This test will check out http POST
 */
import java.net.*;
import java.util.*;
import java.lang.reflect.*;
import sun.net.www.protocol.https.HttpsURLConnectionImpl;
import com.sun.net.ssl.internal.www.protocol.https.HttpsURLConnectionOldImpl;

public class CheckMethods {
    static boolean debug = false;
    static class MethodSignature {
        String name;
        Class[] paramTypes;
        MethodSignature(String name, Class[] paramTypes) {
            this.name = name;
            this.paramTypes = paramTypes;
        }

        public boolean equals(Object obj) {
            if (debug)
                System.out.println("comparing "+this +" against: "+obj);
            if (!(obj instanceof MethodSignature)) {
                if (debug)
                    System.out.println(false);
                return false;
            }
            MethodSignature ms = (MethodSignature) obj;
            Class[] types = ms.paramTypes;
            try {
                for (int i = 0; i < types.length; i++) {
                    if (!types[i].equals(paramTypes[i])) {
                        if (debug)
                            System.out.println(false);
                        return false;
                    }
                }
            } catch (Exception e) {
                if (debug)
                    System.out.println(false);
                return false;
            }
            boolean result = this.name.equals(ms.name);
            if (debug)
                System.out.println(result);
            return result;
        }

        public String toString() {
            StringBuffer sb = new StringBuffer(name+"(");
            for (int i = 0; i < paramTypes.length; i++) {
                sb.append(paramTypes[i].getName()+",");
                if (i == (paramTypes.length -1))
                    sb.deleteCharAt(sb.length()-1);
            }
            sb.append(")");
            return sb.toString();
        }
    }

    // check HttpsURLConnectionImpl and HttpsURLConnectionOldImpl
    // contain all public and protected methods defined in
    // HttpURLConnection and URLConnection
    public static void main(String[] args) {
        ArrayList allMethods = new ArrayList(
            Arrays.asList(HttpURLConnection.class.getDeclaredMethods()));
        allMethods.addAll(Arrays.asList(URLConnection.class.getDeclaredMethods()));
        ArrayList allMethodSignatures = new ArrayList();
        for (Iterator itr = allMethods.iterator(); itr.hasNext(); ) {
            Method m = (Method)itr.next();
            // don't include static and private methods
            if (!Modifier.isStatic(m.getModifiers()) &&
                (Modifier.isPublic(m.getModifiers()) ||
                 Modifier.isProtected(m.getModifiers()))) {
                allMethodSignatures.add(
                    new MethodSignature(m.getName(), m.getParameterTypes()));
            }
        }

        // testing HttpsURLConnectionImpl
        List httpsMethods =
            Arrays.asList(HttpsURLConnectionImpl.class.getDeclaredMethods());

        ArrayList httpsMethodSignatures = new ArrayList();
        for (Iterator itr = httpsMethods.iterator(); itr.hasNext(); ) {
            Method m = (Method)itr.next();
            if (!Modifier.isStatic(m.getModifiers())) {
                httpsMethodSignatures.add(
                 new MethodSignature(m.getName(), m.getParameterTypes()));
            }
        }

        if (!httpsMethodSignatures.containsAll(allMethodSignatures)) {
            throw new RuntimeException("Method definition test failed on HttpsURLConnectionImpl");
        }

        // testing HttpsURLConnectionOldImpl
        List httpsOldMethods =
            Arrays.asList(HttpsURLConnectionOldImpl.class.getDeclaredMethods());

        ArrayList httpsOldMethodSignatures = new ArrayList();
        for (Iterator itr = httpsOldMethods.iterator(); itr.hasNext(); ) {
            Method m = (Method)itr.next();
            if (!Modifier.isStatic(m.getModifiers())) {
                httpsOldMethodSignatures.add(
                 new MethodSignature(m.getName(), m.getParameterTypes()));
            }
        }

        if (!httpsOldMethodSignatures.containsAll(allMethodSignatures)) {
            throw new RuntimeException("Method definition test failed" +
                                       " on HttpsURLConnectionOldImpl");
        }

        // testing for non static public field
        ArrayList allFields = new ArrayList(
            Arrays.asList(URLConnection.class.getFields()));
        allFields.addAll(Arrays.asList(HttpURLConnection.class.getFields()));

        for (Iterator itr = allFields.iterator(); itr.hasNext(); ) {
            Field f = (Field) itr.next();
            if (!Modifier.isStatic(f.getModifiers())) {
                throw new RuntimeException("Non static Public fields" +
                                           " declared in superclasses");
            }
        }
    }
}