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.core.input;
18
19 import java.io.BufferedInputStream;
20 import java.io.InputStream;
21 import java.nio.charset.Charset;
22 import java.nio.file.Files;
23 import java.nio.file.Path;
24
25 import org.apache.commons.geometry.io.core.AbstractGeometryIOMetadata;
26 import org.apache.commons.geometry.io.core.internal.GeometryIOUtils;
27
28 /** {@link GeometryInput} implementation for reading content from a file.
29 */
30 public class FileGeometryInput extends AbstractGeometryIOMetadata
31 implements GeometryInput {
32
33 /** Input file. */
34 private final Path file;
35
36 /** Construct a new instance for reading from the given file.
37 * @param file input file
38 */
39 public FileGeometryInput(final Path file) {
40 this(file, null);
41 }
42
43 /** Construct a new instance for reading from the given file with the
44 * specific charset.
45 * @param file input file
46 * @param charset charset to use when reading from the input file
47 */
48 public FileGeometryInput(final Path file, final Charset charset) {
49 super(GeometryIOUtils.getFileName(file), charset);
50
51 this.file = file;
52 }
53
54 /** Get the input file.
55 * @return input file
56 */
57 public Path getFile() {
58 return file;
59 }
60
61 /** {@inheritDoc}
62 *
63 * <p>The returned input stream is buffered.</p>
64 */
65 @Override
66 public InputStream getInputStream() {
67 return GeometryIOUtils.getUnchecked(() -> new BufferedInputStream(Files.newInputStream(file)));
68 }
69
70 /** {@inheritDoc} */
71 @Override
72 public String toString() {
73 final StringBuilder sb = new StringBuilder();
74 sb.append(getClass().getSimpleName())
75 .append("[file= ")
76 .append(getFile())
77 .append(']');
78
79 return sb.toString();
80 }
81 }