| 1 | /* |
| 2 | * Copyright (C) Christian Schulte, 2011-292 |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * |
| 9 | * o Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * |
| 12 | * o Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in |
| 14 | * the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| 18 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
| 19 | * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | * |
| 28 | * $JOMC: Messages.java 4760 2013-04-08 17:56:26Z schulte $ |
| 29 | * |
| 30 | */ |
| 31 | package org.jomc.ant.types; |
| 32 | |
| 33 | import java.text.MessageFormat; |
| 34 | import java.util.MissingResourceException; |
| 35 | import java.util.ResourceBundle; |
| 36 | |
| 37 | /** |
| 38 | * Utilities for accessing messages. |
| 39 | * |
| 40 | * @author <a href="mailto:cs@schulte.it">Christian Schulte</a> |
| 41 | * @version $JOMC: Messages.java 4760 2013-04-08 17:56:26Z schulte $ |
| 42 | */ |
| 43 | abstract class Messages |
| 44 | { |
| 45 | |
| 46 | /** Constant for the name of the resource bundle backing the tasks. */ |
| 47 | private static final String RESOURCE_BUNDLE_NAME = |
| 48 | Messages.class.getPackage().getName().replace( '.', '/' ) + "/Messages"; |
| 49 | |
| 50 | /** Creates a new {@code Messages} instance. */ |
| 51 | Messages() |
| 52 | { |
| 53 | super(); |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * Gets a message for a given key from the resource bundle backing the tasks formatted using the given arguments. |
| 58 | * |
| 59 | * @param key The key of the string to get. |
| 60 | * @param arguments The arguments to format the string with. |
| 61 | * |
| 62 | * @return The string matching {@code key} formatted using {@code arguments}. |
| 63 | * |
| 64 | * @throws NullPointerException if {@code key} is {@code null}. |
| 65 | */ |
| 66 | static String getMessage( final String key, final Object... arguments ) |
| 67 | { |
| 68 | if ( key == null ) |
| 69 | { |
| 70 | throw new NullPointerException( "key" ); |
| 71 | } |
| 72 | |
| 73 | try |
| 74 | { |
| 75 | return MessageFormat.format( ResourceBundle.getBundle( RESOURCE_BUNDLE_NAME ).getString( key ), arguments ); |
| 76 | } |
| 77 | catch ( final MissingResourceException e ) |
| 78 | { |
| 79 | throw new AssertionError( e ); |
| 80 | } |
| 81 | catch ( final ClassCastException e ) |
| 82 | { |
| 83 | throw new AssertionError( e ); |
| 84 | } |
| 85 | catch ( final IllegalArgumentException e ) |
| 86 | { |
| 87 | throw new AssertionError( e ); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * Gets the message of a given {@code Throwable} recursively. |
| 93 | * |
| 94 | * @param t The {@code Throwable} to get the message of or {@code null}. |
| 95 | * |
| 96 | * @return The message of {@code t} or {@code null}. |
| 97 | */ |
| 98 | static String getMessage( final Throwable t ) |
| 99 | { |
| 100 | return t != null |
| 101 | ? t.getMessage() != null && t.getMessage().trim().length() > 0 |
| 102 | ? t.getMessage() |
| 103 | : getMessage( t.getCause() ) |
| 104 | : null; |
| 105 | |
| 106 | } |
| 107 | |
| 108 | } |