1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.geometry.io.euclidean.threed.obj;
18
19 import java.io.Reader;
20 import java.nio.charset.Charset;
21 import java.nio.charset.StandardCharsets;
22
23 import org.apache.commons.geometry.euclidean.threed.mesh.TriangleMesh;
24 import org.apache.commons.geometry.io.core.GeometryFormat;
25 import org.apache.commons.geometry.io.core.input.GeometryInput;
26 import org.apache.commons.geometry.io.core.internal.GeometryIOUtils;
27 import org.apache.commons.geometry.io.euclidean.threed.AbstractBoundaryReadHandler3D;
28 import org.apache.commons.geometry.io.euclidean.threed.FacetDefinitionReader;
29 import org.apache.commons.geometry.io.euclidean.threed.GeometryFormat3D;
30 import org.apache.commons.numbers.core.Precision;
31
32 /** {@link org.apache.commons.geometry.io.euclidean.threed.BoundaryReadHandler3D BoundaryReadHandler3D}
33 * implementation for reading OBJ data. Input is read using the UTF-8 charset by default.
34 */
35 public class ObjBoundaryReadHandler3D extends AbstractBoundaryReadHandler3D {
36
37 /** Charset for reading text input. */
38 private Charset defaultCharset = StandardCharsets.UTF_8;
39
40 /** {@inheritDoc} */
41 @Override
42 public GeometryFormat getFormat() {
43 return GeometryFormat3D.OBJ;
44 }
45
46 /** Get the text input default charset, used if the input does not
47 * specify a charset.
48 * @return text input default charset
49 */
50 public Charset getDefaultCharset() {
51 return defaultCharset;
52 }
53
54 /** Set the text input default charset, used if the input does not
55 * specify a charset.
56 * @param charset text input default charset
57 */
58 public void setDefaultCharset(final Charset charset) {
59 this.defaultCharset = charset;
60 }
61
62 /** {@inheritDoc} */
63 @Override
64 public FacetDefinitionReader facetDefinitionReader(final GeometryInput in) {
65 return new ObjFacetDefinitionReader(createReader(in));
66 }
67
68 /** {@inheritDoc} */
69 @Override
70 public TriangleMesh readTriangleMesh(final GeometryInput in, final Precision.DoubleEquivalence precision) {
71 try (ObjTriangleMeshReader meshReader = new ObjTriangleMeshReader(createReader(in), precision)) {
72 return meshReader.readTriangleMesh();
73 }
74 }
75
76 /** Create a {@link Reader} for reading character data from the given input.
77 * @param in input to read from
78 * @return reader instance
79 * @throws java.io.UncheckedIOException if an I/O error occurs
80 */
81 private Reader createReader(final GeometryInput in) {
82 return GeometryIOUtils.createBufferedReader(in, defaultCharset);
83 }
84 }