123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143 |
- package org.aspectj.apache.bcel.verifier;
-
- /* ====================================================================
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2001 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Apache" and "Apache Software Foundation" and
- * "Apache BCEL" must not be used to endorse or promote products
- * derived from this software without prior written permission. For
- * written permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * "Apache BCEL", nor may "Apache" appear in their name, without
- * prior written permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
-
- import java.util.HashMap;
- import java.util.Iterator;
- import java.util.Vector;
-
- /**
- * This class produces instances of the Verifier class. Its purpose is to make
- * sure that they are singleton instances with respect to the class name they
- * operate on. That means, for every class (represented by a unique fully qualified
- * class name) there is exactly one Verifier.
- *
- * @version $Id: VerifierFactory.java,v 1.3 2009/09/09 19:56:20 aclement Exp $
- * @author <A HREF="http://www.inf.fu-berlin.de/~ehaase"/>Enver Haase</A>
- * @see org.aspectj.apache.bcel.verifier.Verifier
- */
- public class VerifierFactory{
-
- /**
- * The HashMap that holds the data about the already-constructed Verifier instances.
- */
- private static HashMap<String, Verifier> hashMap = new HashMap<String, Verifier>();
-
- /**
- * The VerifierFactoryObserver instances that observe the VerifierFactory.
- */
- private static Vector<VerifierFactoryObserver> observers = new Vector<VerifierFactoryObserver>();
-
- /**
- * The VerifierFactory is not instantiable.
- */
- private VerifierFactory(){}
-
- /**
- * Returns the (only) verifier responsible for the class with the given name.
- * Possibly a new Verifier object is transparently created.
- * @return the (only) verifier responsible for the class with the given name.
- */
- public static Verifier getVerifier(String fully_qualified_classname){
- // fully_qualified_classname = fully_qualified_classname;
-
- Verifier v = (hashMap.get(fully_qualified_classname));
- if (v==null){
- v = new Verifier(fully_qualified_classname);
- hashMap.put(fully_qualified_classname, v);
- notify(fully_qualified_classname);
- }
-
- return v;
- }
-
- /**
- * Notifies the observers of a newly generated Verifier.
- */
- private static void notify(String fully_qualified_classname){
- // notify the observers
- Iterator<VerifierFactoryObserver> i = observers.iterator();
- while (i.hasNext()){
- VerifierFactoryObserver vfo = i.next();
- vfo.update(fully_qualified_classname);
- }
- }
-
- /**
- * Returns all Verifier instances created so far.
- * This is useful when a Verifier recursively lets
- * the VerifierFactory create other Verifier instances
- * and if you want to verify the transitive hull of
- * referenced class files.
- */
- public static Verifier[] getVerifiers(){
- Verifier[] vs = new Verifier[hashMap.values().size()];
- return (hashMap.values().toArray(vs)); // Because vs is big enough, vs is used to store the values into and returned!
- }
-
- /**
- * Adds the VerifierFactoryObserver o to the list of observers.
- */
- public static void attach(VerifierFactoryObserver o){
- observers.addElement(o);
- }
-
- /**
- * Removes the VerifierFactoryObserver o from the list of observers.
- */
- public static void detach(VerifierFactoryObserver o){
- observers.removeElement(o);
- }
- }
|