/*
    * 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
    *
   *   http://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.maven.model.building;
  
  import javax.inject.Inject;
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.Reader;
  import java.util.Map;
  
  import org.apache.maven.model.Model;
  import org.apache.maven.model.io.ModelReader;
  import org.apache.maven.model.locator.ModelLocator;
  import org.eclipse.sisu.Typed;
  
  /**
   *
   * Note: uses @Typed to limit the types it is available for injection to just ModelProcessor.
   *
   * This is because the ModelProcessor interface extends ModelLocator and ModelReader. If we
   * made this component available under all its interfaces then it could end up being injected
   * into itself leading to a stack overflow.
   *
   * A side-effect of using @Typed is that it translates to explicit bindings in the container.
   * So instead of binding the component under a 'wildcard' key it is now bound with an explicit
   * key. Since this is a default component this will be a plain binding of ModelProcessor to
   * this implementation type, ie. no hint/name.
   *
   * This leads to a second side-effect in that any @Inject request for just ModelProcessor in
   * the same injector is immediately matched to this explicit binding, which means extensions
   * cannot override this binding. This is because the lookup is always short-circuited in this
   * specific situation (plain @Inject request, and plain explicit binding for the same type.)
   *
   * The simplest solution is to use a custom @Named here so it isn't bound under the plain key.
   * This is only necessary for default components using @Typed that want to support overriding.
   *
   * As a non-default component this now gets a negative priority relative to other implementations
   * of the same interface. Since we want to allow overriding this doesn't matter in this case.
   * (if it did we could add @Priority of 0 to match the priority given to default components.)
   */
  @Named("core-default")
  @Singleton
  @Typed(ModelProcessor.class)
  public class DefaultModelProcessor implements ModelProcessor {
  
      @Inject
      private ModelLocator locator;
  
      @Inject
      private ModelReader reader;
  
      public DefaultModelProcessor setModelLocator(ModelLocator locator) {
          this.locator = locator;
          return this;
      }
  
      public DefaultModelProcessor setModelReader(ModelReader reader) {
          this.reader = reader;
          return this;
      }
  
      @Override
      public File locatePom(File projectDirectory) {
          return locator.locatePom(projectDirectory);
      }
  
      @Override
      public Model read(File input, Map<String, ?> options) throws IOException {
          return reader.read(input, options);
      }
  
      @Override
      public Model read(Reader input, Map<String, ?> options) throws IOException {
          return reader.read(input, options);
      }
  
      @Override
      public Model read(InputStream input, Map<String, ?> options) throws IOException {
          return reader.read(input, options);
     }
 }