/*
    * 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.io;
  
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.Reader;
  import java.util.Map;
  import java.util.Objects;
  
  import org.apache.maven.model.InputSource;
  import org.apache.maven.model.Model;
  import org.apache.maven.model.io.xpp3.MavenXpp3Reader;
  import org.apache.maven.model.io.xpp3.MavenXpp3ReaderEx;
  import org.codehaus.plexus.util.ReaderFactory;
  import org.codehaus.plexus.util.xml.XmlStreamReader;
  import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
  
  /**
   * Handles deserialization of a model from some kind of textual format like XML.
   *
   * @author Benjamin Bentmann
   */
  @Named
  @Singleton
  public class DefaultModelReader implements ModelReader {
  
      @Override
      public Model read(File input, Map<String, ?> options) throws IOException {
          Objects.requireNonNull(input, "input cannot be null");
  
          Model model = read(new FileInputStream(input), options);
  
          model.setPomFile(input);
  
          return model;
      }
  
      @Override
      public Model read(Reader input, Map<String, ?> options) throws IOException {
          Objects.requireNonNull(input, "input cannot be null");
  
          try (Reader in = input) {
              return read(in, isStrict(options), getSource(options));
          }
      }
  
      @Override
      public Model read(InputStream input, Map<String, ?> options) throws IOException {
          Objects.requireNonNull(input, "input cannot be null");
  
          try (XmlStreamReader in = ReaderFactory.newXmlReader(input)) {
              return read(in, isStrict(options), getSource(options));
          }
      }
  
      private boolean isStrict(Map<String, ?> options) {
          Object value = (options != null) ? options.get(IS_STRICT) : null;
          return value == null || Boolean.parseBoolean(value.toString());
      }
  
      private InputSource getSource(Map<String, ?> options) {
          Object value = (options != null) ? options.get(INPUT_SOURCE) : null;
          return (InputSource) value;
      }
  
      private Model read(Reader reader, boolean strict, InputSource source) throws IOException {
          try {
              if (source != null) {
                  return new MavenXpp3ReaderEx().read(reader, strict, source);
              } else {
                  return new MavenXpp3Reader().read(reader, strict);
              }
          } catch (XmlPullParserException e) {
              throw new ModelParseException(e.getMessage(), e.getLineNumber(), e.getColumnNumber(), e);
          }
      }
  }