| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.polygene.library.restlet.identity; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.function.Predicate; |
| import org.apache.polygene.api.common.Optional; |
| import org.apache.polygene.api.concern.Concerns; |
| import org.apache.polygene.api.configuration.Configuration; |
| import org.apache.polygene.api.identity.Identity; |
| import org.apache.polygene.api.identity.IdentityGenerator; |
| import org.apache.polygene.api.identity.StringIdentity; |
| import org.apache.polygene.api.injection.scope.Service; |
| import org.apache.polygene.api.injection.scope.This; |
| import org.apache.polygene.api.mixin.Mixins; |
| import org.apache.polygene.api.unitofwork.concern.UnitOfWorkConcern; |
| import org.apache.polygene.api.unitofwork.concern.UnitOfWorkPropagation; |
| |
| @Mixins( IdentityManager.Mixin.class ) |
| @Concerns( { UnitOfWorkConcern.class } ) |
| public interface IdentityManager |
| { |
| String SEPARATOR = "~"; |
| String IDENTITY_SIGNATURE = "[0-9][0-9]*~.*"; |
| |
| boolean isIdentity( String candidate ); |
| |
| Identity generate( Class type, @Optional String canonicalName ); |
| |
| String extractName( Identity identity ); |
| |
| Class extractType( Identity identity ); |
| |
| @UnitOfWorkPropagation |
| String findPrefix( Class type ); |
| |
| class Mixin |
| implements IdentityManager |
| { |
| @Service |
| private IdentityGenerator uuidService; |
| |
| @This |
| private Configuration<IdentityMappingConfiguration> config; |
| |
| private ConcurrentHashMap<String, Class> actualClasses = new ConcurrentHashMap<>(); |
| |
| @Override |
| public boolean isIdentity( String candidate ) |
| { |
| return candidate.matches( IDENTITY_SIGNATURE ); |
| } |
| |
| @Override |
| public Identity generate( Class type, String canonicalName ) |
| { |
| if( canonicalName == null ) |
| { |
| canonicalName = uuidService.generate( type ).toString(); |
| } |
| if( isIdentity( canonicalName ) ) |
| { |
| // This is already an ID, and we simply return it. |
| return StringIdentity.identity( canonicalName ); |
| } |
| String prefix = findPrefix( type ); |
| return StringIdentity.identity( prefix + SEPARATOR + canonicalName ); |
| } |
| |
| @Override |
| public String findPrefix( Class type ) |
| { |
| Map<String, String> mapping = config.get().mapping().get(); |
| String prefix = mapping.get( type.getName() ); |
| if( prefix == null ) |
| { |
| config.refresh(); |
| mapping = config.get().mapping().get(); |
| prefix = Integer.toString( mapping.size() + 1 ); |
| mapping.put( type.getName(), prefix ); |
| config.get().mapping().set( mapping ); |
| config.save(); |
| } |
| actualClasses.put( type.getName(), type ); |
| return prefix; |
| } |
| |
| @Override |
| public String extractName( Identity identity ) |
| { |
| String idString = identity.toString(); |
| int pos = idString.indexOf( SEPARATOR ); |
| if( pos < 1 ) |
| { |
| throw new InvalidIdentityFormatException( idString ); |
| } |
| return idString.substring( pos + 1 ); |
| } |
| |
| @Override |
| public Class extractType( Identity identity ) |
| { |
| String idString = identity.toString(); |
| if( !isIdentity( idString ) ) |
| { |
| throw new IllegalArgumentException( "Given argument '" + idString + "' is not an Identity" ); |
| } |
| int pos = idString.indexOf( SEPARATOR ); |
| if( pos < 1 ) |
| { |
| throw new InvalidIdentityFormatException( idString ); |
| } |
| String prefix = idString.substring( 0, pos ); |
| Map.Entry<String, String> found = config.get().mapping().get().entrySet().stream() |
| .filter( new FindClassSpecification( prefix ) ) |
| .findFirst().orElse( null ); |
| return found == null ? null : actualClasses.get( found.getKey() ); |
| } |
| |
| private static class FindClassSpecification |
| implements Predicate<Map.Entry<String, String>> |
| { |
| private String prefix; |
| |
| private FindClassSpecification( String prefix ) |
| { |
| this.prefix = prefix; |
| } |
| |
| @Override |
| public boolean test( Map.Entry<String, String> item ) |
| { |
| return item.getValue().equals( prefix ); |
| } |
| } |
| } |
| } |