[4344] | 1 | package org.expressolivre.cte.common; |
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| 2 | |
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| 3 | import java.io.File; |
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| 4 | import java.io.FileReader; |
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| 5 | import java.io.IOException; |
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| 6 | import java.io.InputStream; |
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| 7 | import java.io.InputStreamReader; |
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| 8 | import java.io.Reader; |
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| 9 | import java.net.URL; |
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| 10 | |
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| 11 | /** |
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| 12 | * @author L.F.Estivalet (Serpro) |
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| 13 | * |
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| 14 | * Created on May 9, 2011 at 2:43:28 PM |
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| 15 | * |
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| 16 | */ |
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| 17 | public class IOUtil { |
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| 18 | |
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| 19 | /** |
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| 20 | * Read the entire contents of the specified file and return a single String |
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| 21 | * object containing the contents of the file. |
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| 22 | * |
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| 23 | * @param fileName |
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| 24 | * the name of the file from which to read |
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| 25 | * |
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| 26 | * @return a String containing the contents of the input file |
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| 27 | * |
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| 28 | * @throws IOException |
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| 29 | * if the specified file cannot be opened, or if an I/O error |
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| 30 | * occurs while reading the file |
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| 31 | */ |
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| 32 | public static String readFully(String fileName) throws IOException { |
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| 33 | return readFully(new File(fileName)); |
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| 34 | } |
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| 35 | |
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| 36 | /** |
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| 37 | * Read the entire contents of the specified file and return a single String |
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| 38 | * object containing the contents of the file. This method does not return |
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| 39 | * until the end of the input file is reached. |
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| 40 | * |
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| 41 | * @param file |
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| 42 | * a File from which to read |
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| 43 | * |
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| 44 | * @return a String containing the contents of the input file |
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| 45 | * |
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| 46 | * @throws IOException |
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| 47 | * if the specified file cannot be opened, or if an I/O error |
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| 48 | * occurs while reading the file |
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| 49 | */ |
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| 50 | public static String readFully(File file) throws IOException { |
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| 51 | return readFully(new FileReader(file)); |
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| 52 | } |
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| 53 | |
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| 54 | /** |
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| 55 | * Read the entire contents of the specified URL and return a single String |
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| 56 | * object containing the contents of the URL. This method does not return |
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| 57 | * until an end of stream is reached for the URL. |
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| 58 | * |
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| 59 | * @param url |
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| 60 | * a URL from which to read |
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| 61 | * |
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| 62 | * @return a String containing the contents of the input URL |
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| 63 | * |
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| 64 | * @throws IOException |
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| 65 | * if the specified URL cannot be opened, or if an I/O error |
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| 66 | * occurs while reading the URL |
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| 67 | */ |
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| 68 | public static String readFully(URL url) throws IOException { |
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| 69 | return readFully(url.openStream()); |
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| 70 | } |
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| 71 | |
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| 72 | /** |
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| 73 | * Read the entire contents of the specified InputStream and return a single |
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| 74 | * String object containing the contents of the InputStream. This method |
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| 75 | * does not return until the end of the input stream is reached. |
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| 76 | * |
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| 77 | * @param stream |
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| 78 | * an InputStream from which to read |
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| 79 | * |
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| 80 | * @return a String containing the contents of the input stream |
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| 81 | * |
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| 82 | * @throws IOException |
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| 83 | * if an I/O error occurs while reading the input stream |
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| 84 | */ |
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| 85 | public static String readFully(InputStream stream) throws IOException { |
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| 86 | return readFully(new InputStreamReader(stream)); |
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| 87 | } |
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| 88 | |
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| 89 | /** |
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| 90 | * Read the entire contents of the specified Reader and return a single |
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| 91 | * String object containing the contents of the InputStream. This method |
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| 92 | * does not return until the end of the input file or stream is reached. |
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| 93 | * |
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| 94 | * @param reader |
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| 95 | * a Reader from which to read |
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| 96 | * |
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| 97 | * @return a String containing the contents of the stream |
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| 98 | * |
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| 99 | * @throws IOException |
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| 100 | * if an I/O error occurs while reading the input stream |
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| 101 | */ |
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| 102 | public static String readFully(Reader reader) throws IOException { |
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| 103 | char[] arr = new char[8 * 1024]; // 8K at a time |
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| 104 | StringBuffer buf = new StringBuffer(); |
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| 105 | int numChars; |
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| 106 | |
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| 107 | while ((numChars = reader.read(arr, 0, arr.length)) > 0) { |
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| 108 | buf.append(arr, 0, numChars); |
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| 109 | } |
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| 110 | |
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| 111 | return buf.toString(); |
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| 112 | } |
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| 113 | |
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| 114 | /** |
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| 115 | * Do not construct an instance of this class. |
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| 116 | */ |
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| 117 | private IOUtil() { |
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| 118 | } |
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| 119 | } |
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