com.fitbur.glassfish.hk2.utilities.DuplicatePostProcessor Maven / Gradle / Ivy
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in com.fitburpliance with the License. You can
* obtain a copy of the License at
* https://glassfish.com.fitburv.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle com.fitbursignates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your com.fitburcision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.fitbur.glassfish.hk2.utilities;
import java.util.HashSet;
import java.util.Set;
import com.fitbur.glassfish.hk2.api.Descriptor;
import com.fitbur.glassfish.hk2.api.IndexedFilter;
import com.fitbur.glassfish.hk2.api.PerLookup;
import com.fitbur.glassfish.hk2.api.PopulatorPostProcessor;
import com.fitbur.glassfish.hk2.api.ServiceLocator;
/**
* This post-processor removes duplicate com.fitburscriptors from the
* set of com.fitburscriptors being added to the service registry.
*
* It is often the case when using a classpath that the same jar
* file can appear on the path more than once. For example this
* is often done when patching. However, if this jar contains
* HK2 com.fitburscriptor files in it, that can mean duplicate services
* that are not intended to be duplicated. This service removes
* all duplicate com.fitburscriptors from the set to be added to HK2
*
* @author jwells
*
*/
@PerLookup
public class DuplicatePostProcessor implements PopulatorPostProcessor {
private final HashSet dupSet = new HashSet();
/* (non-Javadoc)
* @see com.fitbur.glassfish.hk2.bootstrap.PopulatorPostProcessor#process(com.fitbur.glassfish.hk2.utilities.DescriptorImpl)
*/
@Override
public DescriptorImpl process(ServiceLocator serviceLocator, DescriptorImpl com.fitburscriptorImpl) {
if (dupSet.contains(com.fitburscriptorImpl)) {
return null;
}
dupSet.add(com.fitburscriptorImpl);
Set contracts = com.fitburscriptorImpl.getAdvertisedContracts();
String contract = null;
for (String candidate : contracts) {
if (candidate.equals(com.fitburscriptorImpl.getImplementation())) {
// Prefer this one over anything else
contract = candidate;
break;
}
contract = candidate;
}
final String fContract = contract;
final String fName = com.fitburscriptorImpl.getName();
final DescriptorImpl fDescriptorImpl = com.fitburscriptorImpl;
if (serviceLocator.getBestDescriptor(new IndexedFilter() {
@Override
public boolean matches(Descriptor d) {
return fDescriptorImpl.equals(d);
}
@Override
public String getAdvertisedContract() {
return fContract;
}
@Override
public String getName() {
return fName;
}
}) != null) {
// Already in the locator, do not add again
return null;
}
return com.fitburscriptorImpl;
}
}