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1   /**
2    * This file Copyright (c) 2014-2018 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.config.source.yaml;
35  
36  import info.magnolia.config.registry.DefinitionProvider;
37  import info.magnolia.config.registry.Registry;
38  import info.magnolia.config.source.AbstractConfigurationSourceBuilder;
39  import info.magnolia.init.MagnoliaConfigurationProperties;
40  import info.magnolia.map2bean.Map2BeanTransformer;
41  import info.magnolia.module.ModuleRegistry;
42  import info.magnolia.objectfactory.Components;
43  import info.magnolia.resourceloader.ResourceOrigin;
44  
45  import java.util.HashMap;
46  import java.util.Map;
47  import java.util.function.Consumer;
48  import java.util.function.Function;
49  import java.util.regex.Pattern;
50  import java.util.regex.PatternSyntaxException;
51  
52  import org.slf4j.Logger;
53  import org.slf4j.LoggerFactory;
54  import org.yaml.snakeyaml.constructor.Construct;
55  
56  /**
57   * Builder for {@link info.magnolia.config.source.yaml.YamlConfigurationSource} instances.
58   */
59  public class YamlConfigurationSourceBuilder extends AbstractConfigurationSourceBuilder {
60  
61      private static final Logger log = LoggerFactory.getLogger(YamlConfigurationSourceBuilder.class);
62  
63      /**
64       * Regex format for config files according to Magnolia module conventions.
65       * Mind the %s part of the regex, which should be replaced with the expected definition type.
66       * @see #moduleConventionsFormatFor(Registry)
67       */
68      private static final String MODULE_CONVENTIONS_FORMAT = "^/(?<module>[a-zA-Z0-9-_]+)/(?<deftype>%s)/(?<relPath>.*/)?(?<name>[a-zA-Z0-9-_\\.]+)\\.yaml$";
69  
70      private final ResourceOrigin origin;
71      private final YamlReader yamlReader;
72      private final MagnoliaConfigurationProperties magnoliaConfigurationProperties;
73      private final Map2BeanTransformer map2BeanTransformer;
74      private final ModuleRegistry moduleRegistry;
75      private final Map<String, Function<Consumer<DefinitionProvider.Problem>, Construct>> customConstructs = new HashMap<>();
76      private final Map<String, Function<Consumer<DefinitionProvider.Problem>, Construct>> customMultiConstructs = new HashMap<>();
77      private String pathPattern;
78  
79      public YamlConfigurationSourceBuilder(ResourceOrigin origin, Map2BeanTransformer map2BeanTransformer, YamlReader yamlReader, MagnoliaConfigurationProperties magnoliaConfigurationProperties, ModuleRegistry moduleRegistry) {
80          this.origin = origin;
81          this.map2BeanTransformer = map2BeanTransformer;
82          this.yamlReader = yamlReader;
83          this.magnoliaConfigurationProperties = magnoliaConfigurationProperties;
84          this.moduleRegistry = moduleRegistry;
85      }
86  
87      /**
88       * @deprecated since 5.5 - use {@link #YamlConfigurationSourceBuilder(ResourceOrigin, Map2BeanTransformer, YamlReader, MagnoliaConfigurationProperties, ModuleRegistry)} instead.
89       */
90      @Deprecated
91      public YamlConfigurationSourceBuilder(ResourceOrigin origin, info.magnolia.config.map2bean.Map2BeanTransformer map2BeanTransformer, YamlReader yamlReader) {
92          this(origin, map2BeanTransformer, yamlReader, Components.getComponent(MagnoliaConfigurationProperties.class), Components.getComponent(ModuleRegistry.class));
93      }
94  
95      /**
96       * @deprecated since 5.5.6 - use {@link #YamlConfigurationSourceBuilder(ResourceOrigin, Map2BeanTransformer, YamlReader, MagnoliaConfigurationProperties, ModuleRegistry)} instead.
97       */
98      @Deprecated
99      public YamlConfigurationSourceBuilder(ResourceOrigin origin, Map2BeanTransformer map2BeanTransformer, YamlReader yamlReader, MagnoliaConfigurationProperties magnoliaConfigurationProperties) {
100         this(origin, map2BeanTransformer, yamlReader, magnoliaConfigurationProperties, Components.getComponent(ModuleRegistry.class));
101     }
102 
103     public YamlConfigurationSourceBuilder withPattern(String pathPattern) {
104         this.pathPattern = pathPattern;
105         return this;
106     }
107 
108     public YamlConfigurationSourceBuilder withCustomConstruct(String tag, Function<Consumer<DefinitionProvider.Problem>, Construct> constructSupplier) {
109         this.customConstructs.put(tag, constructSupplier);
110         return this;
111     }
112 
113     public YamlConfigurationSourceBuilder withCustomMultiConstruct(String tagPrefix, Function<Consumer<DefinitionProvider.Problem>, Construct> constructSupplier) {
114         this.customMultiConstructs.put(tagPrefix, constructSupplier);
115         return this;
116     }
117 
118     public YamlConfigurationSourceBuilder withCustomMultiConstruct(String tagPrefix, Construct construct) {
119         this.yamlReader.registerCustomMultiConstruct(tagPrefix, construct);
120         return this;
121     }
122 
123     public YamlConfigurationSourceBuilder withCustomConstruct(String tag, Construct construct) {
124         this.yamlReader.registerCustomConstruct(tag, construct);
125         return this;
126     }
127 
128     @Override
129     public void bindTo(Registry<?> registry) {
130         final Pattern pathPattern = validatePathPattern(this.pathPattern);
131         if (registry == null) {
132             throw new NullPointerException("Must pass a registry instance");
133         }
134 
135         new YamlConfigurationSource<>(origin, map2BeanTransformer, registry, pathPattern, yamlReader, magnoliaConfigurationProperties, moduleRegistry, customConstructs, customMultiConstructs).start();
136     }
137 
138     public void bindWithDefaults(Registry registry) {
139         if (pathPattern != null) {
140             throw new IllegalStateException(this + " is already partially configured, don't use bindWithDefaults().");
141         }
142         withPattern(moduleConventionsFormatFor(registry)).bindTo(registry);
143     }
144 
145     protected Pattern validatePathPattern(String regex) {
146         if (pathPattern == null) {
147             throw new IllegalStateException(this + " is incomplete.");
148         }
149         try {
150             // Ideally, we'd validate the pattern contains 1 group.
151             return Pattern.compile(regex);
152         } catch (PatternSyntaxException e) {
153             log.warn("Pattern {} is invalid: {}", regex, e.getMessage());
154             return Pattern.compile("$^");
155         }
156     }
157 
158     // TODO Move this (and the regex pattern) to a component that exposes this and more conventions-wrapping objects (e.g Predicate<Path>)
159     protected String moduleConventionsFormatFor(Registry registry) {
160         return String.format(MODULE_CONVENTIONS_FORMAT, registry.type().getPluralName());
161     }
162 
163 }