View Javadoc
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  }