/*
    * 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.commons.geometry.examples.io.threed.obj;
  
  import java.io.BufferedWriter;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.OutputStream;
  import java.io.OutputStreamWriter;
  import java.nio.charset.Charset;
  import java.nio.charset.StandardCharsets;
  
  import org.apache.commons.geometry.core.precision.DoublePrecisionContext;
  import org.apache.commons.geometry.euclidean.threed.BoundarySource3D;
  import org.apache.commons.geometry.euclidean.threed.mesh.TriangleMesh;
  import org.apache.commons.geometry.examples.io.threed.AbstractModelIOHandler;
  import org.apache.commons.geometry.examples.io.threed.ModelIO;
  
  /** {@link org.apache.commons.geometry.examples.io.threed.ModelIOHandler ModelIOHandler}
   * implementation for the OBJ file format.
   */
  public class OBJModelIOHandler extends AbstractModelIOHandler {
  
      /** Charset for use with OBJ files. */
      private static final Charset DEFAULT_CHARSET = StandardCharsets.UTF_8;
  
      /** {@inheritDoc} */
      @Override
      public boolean handlesType(final String type) {
          return ModelIO.OBJ.equalsIgnoreCase(type);
      }
  
      /** {@inheritDoc} */
      @Override
      protected TriangleMesh readInternal(final String type, final InputStream in,
              final DoublePrecisionContext precision) throws IOException {
          try (InputStreamReader reader = new InputStreamReader(in, DEFAULT_CHARSET)) {
              final OBJReader objReader = new OBJReader();
              return objReader.readTriangleMesh(reader, precision);
          }
      }
  
      /** {@inheritDoc} */
      @Override
      protected void writeInternal(final BoundarySource3D model, final String type, final OutputStream out)
              throws IOException {
          try (OBJWriter objWriter = new OBJWriter(new BufferedWriter(
                  new OutputStreamWriter(out, DEFAULT_CHARSET)))) {
              objWriter.writeBoundaries(model);
          }
      }
  }