opendaylight/sal/yang-prototype/code-generator/binding-java-api-generator/src/main/java/org/opendaylight/controller/sal/java/api/generator/GeneratorJavaFile.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. 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.controller.sal.java.api.generator;
   9
  10 import java.io.BufferedWriter;
  11 import java.io.File;
  12 import java.io.FileWriter;
  13 import java.io.IOException;
  14 import java.io.Writer;
  15 import java.util.ArrayList;
  16 import java.util.HashSet;
  17 import java.util.List;
  18 import java.util.Set;
  19
  20 import org.opendaylight.controller.sal.binding.model.api.CodeGenerator;
  21 import org.opendaylight.controller.sal.binding.model.api.GeneratedTransferObject;
  22 import org.opendaylight.controller.sal.binding.model.api.GeneratedType;
  23 import org.opendaylight.controller.sal.binding.model.api.Type;
  24 import org.slf4j.Logger;
  25 import org.slf4j.LoggerFactory;
  26
  27 public class GeneratorJavaFile {
  28
  29     private static final Logger log = LoggerFactory
  30             .getLogger(GeneratorJavaFile.class);
  31     private final CodeGenerator interfaceGenerator;
  32     private final ClassCodeGenerator classGenerator;
  33     private final Set<GeneratedType> genTypes;
  34     private final Set<GeneratedTransferObject> genTransferObjects;
  35
  36     public GeneratorJavaFile(final CodeGenerator codeGenerator,
  37             final Set<GeneratedType> types) {
  38         this.interfaceGenerator = codeGenerator;
  39         this.genTypes = types;
  40         this.genTransferObjects = new HashSet<>();
  41         classGenerator = new ClassCodeGenerator();
  42     }
  43
  44     public GeneratorJavaFile(final Set<GeneratedType> types,
  45             final Set<GeneratedTransferObject> genTransferObjects) {
  46         this.interfaceGenerator = new InterfaceGenerator();
  47         this.classGenerator = new ClassCodeGenerator();
  48         this.genTypes = types;
  49         this.genTransferObjects = genTransferObjects;
  50     }
  51
  52     public List<File> generateToFile(final File parentDirectory) throws IOException {
  53         final List<File> result = new ArrayList<>();
  54         for (GeneratedType type : genTypes) {
  55             final File genFile = generateTypeToJavaFile(parentDirectory, type,
  56                     interfaceGenerator);
  57
  58             if (genFile != null) {
  59                 result.add(genFile);
  60             }
  61         }
  62         for (GeneratedTransferObject transferObject : genTransferObjects) {
  63             final File genFile = generateTypeToJavaFile(parentDirectory,
  64                     transferObject, classGenerator);
  65
  66             if (genFile != null) {
  67                 result.add(genFile);
  68             }
  69         }
  70         return result;
  71     }
  72
  73     private File generateTypeToJavaFile(final File parentDir, final Type type,
  74             final CodeGenerator generator) throws IOException {
  75         if (parentDir == null) {
  76             log.warn("Parent Directory not specified, files will be generated "
  77                     + "accordingly to generated Type package path.");
  78         }
  79         if (type == null) {
  80             log.error("Cannot generate Type into Java File because " +
  81                         "Generated Type is NULL!");
  82             throw new IllegalArgumentException("Generated Type Cannot be NULL!");
  83         }
  84         if (generator == null) {
  85             log.error("Cannot generate Type into Java File because " +
  86                         "Code Generator instance is NULL!");
  87             throw new IllegalArgumentException("Code Generator Cannot be NULL!");
  88         }
  89         final File packageDir = packageToDirectory(parentDir,
  90                 type.getPackageName());
  91
  92         if (!packageDir.exists()) {
  93             packageDir.mkdirs();
  94         }
  95         final File file = new File(packageDir, type.getName() + ".java");
  96         try (final FileWriter fw = new FileWriter(file)) {
  97             file.createNewFile();
  98
  99             try (final BufferedWriter bw = new BufferedWriter(fw)) {
 100                 Writer writer = generator.generate(type);
 101                 bw.write(writer.toString());
 102             }
 103         } catch (IOException e) {
 104             log.error(e.getMessage());
 105             throw new IOException(e.getMessage());
 106         }
 107         return file;
 108     }
 109
 110     private File packageToDirectory(final File parentDirectory,
 111             final String packageName) {
 112         if (packageName == null) {
 113             throw new IllegalArgumentException("Package Name cannot be NULL!");
 114         }
 115
 116         final String[] subDirNames = packageName.split("\\.");
 117         final StringBuilder dirPathBuilder = new StringBuilder();
 118         dirPathBuilder.append(subDirNames[0]);
 119         for (int i = 1; i < subDirNames.length; ++i) {
 120             dirPathBuilder.append(File.separator);
 121             dirPathBuilder.append(subDirNames[i]);
 122         }
 123         return new File(parentDirectory, dirPathBuilder.toString());
 124     }
 125 }