content: /*
   * 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
   *
   *     https://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.avro.mojo;
  
  import org.apache.avro.Schema;
  import org.apache.avro.SchemaParseException;
  import org.apache.avro.SchemaParser;
  import org.apache.maven.plugin.MojoExecutionException;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.Comparator;
  import java.util.List;
  import java.util.stream.Collectors;
  
  /**
   * Generate Java classes from Avro schema files (.avsc)
   *
   * @goal schema
   * @phase generate-sources
   * @requiresDependencyResolution runtime+test
   * @threadSafe
   */
  public class SchemaMojo extends AbstractAvroMojo {
    /**
     * A parser used to parse all schema files. Using a common parser will
     * facilitate the import of external schemas.
     */
    private SchemaParser schemaParser = new SchemaParser();
  
    /**
     * A set of Ant-like inclusion patterns used to select files from the source
     * directory for processing. By default, the pattern <code>**&#47;*.avsc</code>
     * is used to select grammar files.
     *
     * @parameter
     */
    private String[] includes = new String[] { "**/*.avsc" };
  
    /**
     * A set of Ant-like inclusion patterns used to select files from the source
     * directory for processing. By default, the pattern <code>**&#47;*.avsc</code>
     * is used to select grammar files.
     *
     * @parameter
     */
    private String[] testIncludes = new String[] { "**/*.avsc" };
  
    @Override
    protected void doCompile(String[] fileNames, File sourceDirectory, File outputDirectory)
        throws MojoExecutionException {
      final List<File> sourceFiles = Arrays.stream(fileNames)
          .map((String filename) -> new File(sourceDirectory, filename)).collect(Collectors.toList());
      final File sourceFileForModificationDetection = sourceFiles.stream().filter(file -> file.lastModified() > 0)
          .max(Comparator.comparing(File::lastModified)).orElse(null);
      final List<Schema> schemas;
  
      try {
        // This is necessary to maintain backward-compatibility. If there are
        // no imported files then isolate the schemas from each other, otherwise
        // allow them to share a single schema so reuse and sharing of schema
        // is possible.
        SchemaParser parser = imports == null ? new SchemaParser() : schemaParser;
        for (File sourceFile : sourceFiles) {
          parser.parse(sourceFile);
        }
        schemas = parser.getParsedNamedSchemas();
  
        doCompile(sourceFileForModificationDetection, schemas, outputDirectory);
      } catch (IOException | SchemaParseException ex) {
        throw new MojoExecutionException("Error compiling a file in " + sourceDirectory + " to " + outputDirectory, ex);
      }
    }
  
    @Override
    protected String[] getIncludes() {
      return includes;
    }
  
    @Override
    protected String[] getTestIncludes() {
      return testIncludes;
    }
  }
  