| 1 | /* |
|---|---|
| 2 | * Copyright (C) 2007-2010 Júlio Vilmar Gesser. |
| 3 | * Copyright (C) 2011, 2013-2020 The JavaParser Team. |
| 4 | * |
| 5 | * This file is part of JavaParser. |
| 6 | * |
| 7 | * JavaParser can be used either under the terms of |
| 8 | * a) the GNU Lesser General Public License as published by |
| 9 | * the Free Software Foundation, either version 3 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * b) the terms of the Apache License |
| 12 | * |
| 13 | * You should have received a copy of both licenses in LICENCE.LGPL and |
| 14 | * LICENCE.APACHE. Please refer to those files for details. |
| 15 | * |
| 16 | * JavaParser is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU Lesser General Public License for more details. |
| 20 | */ |
| 21 | |
| 22 | package com.github.javaparser; |
| 23 | |
| 24 | import java.io.File; |
| 25 | import java.io.FileInputStream; |
| 26 | import java.io.FileNotFoundException; |
| 27 | import java.io.IOException; |
| 28 | import java.io.InputStream; |
| 29 | import java.io.Reader; |
| 30 | import java.nio.charset.Charset; |
| 31 | import java.nio.file.Files; |
| 32 | import java.nio.file.Path; |
| 33 | |
| 34 | import static com.github.javaparser.utils.Utils.assertNotNull; |
| 35 | |
| 36 | /** |
| 37 | * Factory for providers of source code for JavaParser. Providers that have no parameter for encoding but need it will |
| 38 | * use UTF-8. |
| 39 | */ |
| 40 | public final class Providers { |
| 41 | public static final Charset UTF8 = Charset.forName("utf-8"); |
| 42 | |
| 43 | private Providers() { |
| 44 | } |
| 45 | |
| 46 | public static Provider provider(Reader reader) { |
| 47 | return new StreamProvider(assertNotNull(reader)); |
| 48 | } |
| 49 | |
| 50 | public static Provider provider(InputStream input, Charset encoding) { |
| 51 | assertNotNull(input); |
| 52 | assertNotNull(encoding); |
| 53 | try { |
| 54 | return new StreamProvider(input, encoding.name()); |
| 55 | } catch (IOException e) { |
| 56 | // The only one that is thrown is UnsupportedCharacterEncodingException, |
| 57 | // and that's a fundamental problem, so runtime exception. |
| 58 | throw new RuntimeException(e); |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | public static Provider provider(InputStream input) { |
| 63 | return provider(input, UTF8); |
| 64 | } |
| 65 | |
| 66 | public static Provider provider(File file, Charset encoding) throws FileNotFoundException { |
| 67 | return provider(new FileInputStream(assertNotNull(file)), assertNotNull(encoding)); |
| 68 | } |
| 69 | |
| 70 | public static Provider provider(File file) throws FileNotFoundException { |
| 71 | return provider(assertNotNull(file), UTF8); |
| 72 | } |
| 73 | |
| 74 | public static Provider provider(Path path, Charset encoding) throws IOException { |
| 75 | return provider(Files.newInputStream(assertNotNull(path)), assertNotNull(encoding)); |
| 76 | } |
| 77 | |
| 78 | public static Provider provider(Path path) throws IOException { |
| 79 | return provider(assertNotNull(path), UTF8); |
| 80 | } |
| 81 | |
| 82 | public static Provider provider(String source) { |
| 83 | return new StringProvider(assertNotNull(source)); |
| 84 | } |
| 85 | |
| 86 | |
| 87 | /** |
| 88 | * Provide a Provider from the resource found in class loader with the provided encoding.<br> As resource is |
| 89 | * accessed through a class loader, a leading "/" is not allowed in pathToResource |
| 90 | */ |
| 91 | public static Provider resourceProvider(ClassLoader classLoader, String pathToResource, Charset encoding) throws IOException { |
| 92 | InputStream resourceAsStream = classLoader.getResourceAsStream(pathToResource); |
| 93 | if (resourceAsStream == null) { |
| 94 | throw new IOException("Cannot find " + pathToResource); |
| 95 | } |
| 96 | return provider(resourceAsStream, encoding); |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Provide a Provider from the resource found in the current class loader with the provided encoding.<br> As |
| 101 | * resource is accessed through a class loader, a leading "/" is not allowed in pathToResource |
| 102 | */ |
| 103 | public static Provider resourceProvider(String pathToResource, Charset encoding) throws IOException { |
| 104 | ClassLoader classLoader = Provider.class.getClassLoader(); |
| 105 | return resourceProvider(classLoader, pathToResource, encoding); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Provide a Provider from the resource found in the current class loader with UTF-8 encoding.<br> As resource is |
| 110 | * accessed through a class loader, a leading "/" is not allowed in pathToResource |
| 111 | */ |
| 112 | public static Provider resourceProvider(String pathToResource) throws IOException { |
| 113 | return resourceProvider(pathToResource, UTF8); |
| 114 | } |
| 115 | |
| 116 | public interface PreProcessor { |
| 117 | Provider process(Provider innerProvider); |
| 118 | } |
| 119 | } |
| 120 |
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