1 /** 2 * This file Copyright (c) 2017-2018 Magnolia International 3 * Ltd. (http://www.magnolia-cms.com). All rights reserved. 4 * 5 * 6 * This file is dual-licensed under both the Magnolia 7 * Network Agreement and the GNU General Public License. 8 * You may elect to use one or the other of these licenses. 9 * 10 * This file is distributed in the hope that it will be 11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the 12 * implied warranty of MERCHANTABILITY or FITNESS FOR A 13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. 14 * Redistribution, except as permitted by whichever of the GPL 15 * or MNA you select, is prohibited. 16 * 17 * 1. For the GPL license (GPL), you can redistribute and/or 18 * modify this file under the terms of the GNU General 19 * Public License, Version 3, as published by the Free Software 20 * Foundation. You should have received a copy of the GNU 21 * General Public License, Version 3 along with this program; 22 * if not, write to the Free Software Foundation, Inc., 51 23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 24 * 25 * 2. For the Magnolia Network Agreement (MNA), this file 26 * and the accompanying materials are made available under the 27 * terms of the MNA which accompanies this distribution, and 28 * is available at http://www.magnolia-cms.com/mna.html 29 * 30 * Any modifications to this file must keep this entire header 31 * intact. 32 * 33 */ 34 package info.magnolia.transformer; 35 36 import info.magnolia.jcr.node2bean.TypeDescriptor; 37 38 import java.util.Collections; 39 import java.util.Map; 40 import java.util.Optional; 41 import java.util.Set; 42 43 import javax.inject.Inject; 44 45 /** 46 * BeanTypeResolver is a utility which allows the developers to inject custom bean 47 * type deduction logic into the to-bean transformers. 48 * <p> 49 * The main purpose of this class is to aggregate and orchestrate the instances 50 * of {@link TypeResolver} components, which in turn actually provide the resolution 51 * logic. 52 * </p> 53 * <p> 54 * At the moment {@link BeanTypeResolver} simply picks the first {@link TypeResolver type resolver} 55 * capable of handling the current data and delegates the type resolution to it. 56 * </p> 57 * <p><strong>NOTE:</strong> for the time being this class is meant for the internal use only and is a subject to change any moment!</p> 58 * 59 * @see ClassPropertyBasedTypeResolver 60 */ 61 public final class BeanTypeResolver { 62 63 private final Set<TypeResolver> resolvers; 64 65 public BeanTypeResolver() { 66 this(Collections.singleton(new ClassPropertyBasedTypeResolver())); 67 } 68 69 @Inject 70 public BeanTypeResolver(Set<TypeResolver> resolvers) { 71 this.resolvers = resolvers; 72 } 73 74 /** 75 * Resolve the exact bean type from the provided base type information and the map of raw bean properties. 76 * 77 * @param typeDescriptor type descriptor corresponding to the base class or interfaces, the descendant of which needs 78 * to be resolved. 79 * @param properties raw map of bean properties (depending on the case and the transformer type may also contain 80 * additional metadata information) 81 * 82 * @return resolved bean type 83 */ 84 public Optional<Class<?>> resolve(TypeDescriptor typeDescriptor, Map<String, Object> properties) { 85 return resolvers.stream() 86 .map(resolver -> resolver.resolveType(typeDescriptor, properties)) 87 .filter(Optional::isPresent) 88 .findFirst() 89 .orElse(Optional.empty()); 90 } 91 }