binding/mdsal-binding-java-api-generator/src/main/java/org/opendaylight/mdsal/binding/java/api/generator/JavaFileGenerator.java

   1 /*
   2  * Copyright (c) 2020 PATHEON.tech, s.r.o. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.mdsal.binding.java.api.generator;
   9
  10 import com.google.common.annotations.VisibleForTesting;
  11 import com.google.common.base.CharMatcher;
  12 import com.google.common.collect.HashBasedTable;
  13 import com.google.common.collect.ImmutableSet;
  14 import com.google.common.collect.ImmutableSet.Builder;
  15 import com.google.common.collect.ImmutableTable;
  16 import com.google.common.collect.Table;
  17 import java.io.File;
  18 import java.util.ArrayList;
  19 import java.util.List;
  20 import java.util.Map;
  21 import java.util.ServiceLoader;
  22 import java.util.Set;
  23 import org.opendaylight.mdsal.binding.generator.BindingGenerator;
  24 import org.opendaylight.mdsal.binding.model.api.CodeGenerator;
  25 import org.opendaylight.mdsal.binding.model.api.GeneratedType;
  26 import org.opendaylight.mdsal.binding.model.api.Type;
  27 import org.opendaylight.yangtools.plugin.generator.api.FileGenerator;
  28 import org.opendaylight.yangtools.plugin.generator.api.FileGeneratorException;
  29 import org.opendaylight.yangtools.plugin.generator.api.GeneratedFile;
  30 import org.opendaylight.yangtools.plugin.generator.api.GeneratedFileLifecycle;
  31 import org.opendaylight.yangtools.plugin.generator.api.GeneratedFilePath;
  32 import org.opendaylight.yangtools.plugin.generator.api.GeneratedFileType;
  33 import org.opendaylight.yangtools.plugin.generator.api.ModuleResourceResolver;
  34 import org.opendaylight.yangtools.yang.binding.YangModelBindingProvider;
  35 import org.opendaylight.yangtools.yang.binding.contract.Naming;
  36 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  37 import org.opendaylight.yangtools.yang.model.api.Module;
  38 import org.opendaylight.yangtools.yang.model.api.source.YangTextSource;
  39 import org.slf4j.Logger;
  40 import org.slf4j.LoggerFactory;
  41
  42 final class JavaFileGenerator implements FileGenerator {
  43     public static final String CONFIG_IGNORE_DUPLICATE_FILES = "ignoreDuplicateFiles";
  44
  45     private static final Logger LOG = LoggerFactory.getLogger(JavaFileGenerator.class);
  46     private static final CharMatcher DOT_MATCHER = CharMatcher.is('.');
  47     private static final String MODULE_INFO = Naming.MODULE_INFO_CLASS_NAME + ".java";
  48     private static final String MODEL_BINDING_PROVIDER = Naming.MODEL_BINDING_PROVIDER_CLASS_NAME + ".java";
  49     private static final GeneratedFilePath MODEL_BINDING_PROVIDER_SERVICE =
  50         GeneratedFilePath.ofPath("META-INF/services/" + YangModelBindingProvider.class.getName());
  51     private static final List<CodeGenerator> GENERATORS = List.of(
  52         new InterfaceGenerator(), new TOGenerator(), new EnumGenerator(), new BuilderGenerator());
  53
  54     private final BindingGenerator bindingGenerator;
  55     private final boolean ignoreDuplicateFiles;
  56
  57     JavaFileGenerator(final Map<String, String> configuration) {
  58         final String ignoreDuplicateFilesString = configuration.get(CONFIG_IGNORE_DUPLICATE_FILES);
  59         if (ignoreDuplicateFilesString != null) {
  60             ignoreDuplicateFiles = Boolean.parseBoolean(ignoreDuplicateFilesString);
  61         } else {
  62             ignoreDuplicateFiles = true;
  63         }
  64         bindingGenerator = ServiceLoader.load(BindingGenerator.class).findFirst()
  65             .orElseThrow(() -> new IllegalStateException("No BindingGenerator implementation found"));
  66     }
  67
  68     @Override
  69     public Table<GeneratedFileType, GeneratedFilePath, GeneratedFile> generateFiles(final EffectiveModelContext context,
  70             final Set<Module> localModules, final ModuleResourceResolver moduleResourcePathResolver)
  71                 throws FileGeneratorException {
  72         final Table<GeneratedFileType, GeneratedFilePath, GeneratedFile> result =
  73             generateFiles(bindingGenerator.generateTypes(context, localModules), ignoreDuplicateFiles);
  74
  75         // YangModuleInfo files
  76         final Builder<String> bindingProviders = ImmutableSet.builder();
  77         for (Module module : localModules) {
  78             final YangModuleInfoTemplate template = new YangModuleInfoTemplate(module, context,
  79                 mod -> moduleResourcePathResolver.findModuleResourcePath(mod, YangTextSource.class));
  80             final String path = DOT_MATCHER.replaceFrom(template.getPackageName(), '/') + "/";
  81
  82             result.put(GeneratedFileType.SOURCE, GeneratedFilePath.ofPath(path + MODULE_INFO),
  83                 new SupplierGeneratedFile(GeneratedFileLifecycle.TRANSIENT, template::generate));
  84             result.put(GeneratedFileType.SOURCE, GeneratedFilePath.ofPath(path + MODEL_BINDING_PROVIDER),
  85                 new SupplierGeneratedFile(GeneratedFileLifecycle.TRANSIENT, template::generateModelProvider));
  86
  87             bindingProviders.add(template.getModelBindingProviderName());
  88         }
  89
  90         // META-INF/services entries, sorted to make the build predictable
  91         final List<String> sorted = new ArrayList<>(bindingProviders.build());
  92         sorted.sort(String::compareTo);
  93
  94         result.put(GeneratedFileType.RESOURCE, MODEL_BINDING_PROVIDER_SERVICE,
  95             GeneratedFile.of(GeneratedFileLifecycle.TRANSIENT, String.join("\n", sorted)));
  96
  97         return ImmutableTable.copyOf(result);
  98     }
  99
 100     @VisibleForTesting
 101     static Table<GeneratedFileType, GeneratedFilePath, GeneratedFile> generateFiles(final List<GeneratedType> types,
 102             final boolean ignoreDuplicateFiles) {
 103         final Table<GeneratedFileType, GeneratedFilePath, GeneratedFile> result = HashBasedTable.create();
 104
 105         for (Type type : types) {
 106             for (CodeGenerator generator : GENERATORS) {
 107                 if (!generator.isAcceptable(type)) {
 108                     continue;
 109                 }
 110
 111                 final GeneratedFilePath file =  GeneratedFilePath.ofFilePath(
 112                     type.getPackageName().replace('.', File.separatorChar)
 113                     + File.separator + generator.getUnitName(type) + ".java");
 114
 115                 if (result.contains(GeneratedFileType.SOURCE, file)) {
 116                     if (ignoreDuplicateFiles) {
 117                         LOG.warn("Naming conflict for type '{}': file with same name already exists and will not be "
 118                                 + "generated.", type.getFullyQualifiedName());
 119                         continue;
 120                     }
 121                     throw new IllegalStateException("Duplicate file '" + file.getPath() + "' for "
 122                         + type.getFullyQualifiedName());
 123                 }
 124
 125                 result.put(GeneratedFileType.SOURCE, file,
 126                     new CodeGeneratorGeneratedFile(GeneratedFileLifecycle.TRANSIENT, generator, type));
 127             }
 128         }
 129
 130         return result;
 131     }
 132 }