| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| ExceptionDecor |
|
| 2.0;2 |
| 1 | /** | |
| 2 | * Copyright (c) 2012-2015, jcabi.com | |
| 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: 1) Redistributions of source code must retain the above | |
| 8 | * copyright notice, this list of conditions and the following | |
| 9 | * disclaimer. 2) Redistributions in binary form must reproduce the above | |
| 10 | * copyright notice, this list of conditions and the following | |
| 11 | * disclaimer in the documentation and/or other materials provided | |
| 12 | * with the distribution. 3) Neither the name of the jcabi.com nor | |
| 13 | * the names of its contributors may be used to endorse or promote | |
| 14 | * products derived from this software without specific prior written | |
| 15 | * permission. | |
| 16 | * | |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT | |
| 19 | * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 20 | * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL | |
| 21 | * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
| 22 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
| 24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 26 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 28 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 | */ | |
| 30 | package com.jcabi.log; | |
| 31 | ||
| 32 | import java.io.PrintWriter; | |
| 33 | import java.io.StringWriter; | |
| 34 | import java.util.Formattable; | |
| 35 | import java.util.FormattableFlags; | |
| 36 | import java.util.Formatter; | |
| 37 | import lombok.EqualsAndHashCode; | |
| 38 | import lombok.ToString; | |
| 39 | ||
| 40 | /** | |
| 41 | * Decorates an exception. | |
| 42 | * | |
| 43 | * <p>For example: | |
| 44 | * | |
| 45 | * <pre> | |
| 46 | * try { | |
| 47 | * // ... | |
| 48 | * } catch (final IOException ex) { | |
| 49 | * Logger.error("failed to open file: %[exception]s", ex); | |
| 50 | * throw new IllegalArgumentException(ex); | |
| 51 | * } | |
| 52 | * </pre> | |
| 53 | * | |
| 54 | * @author Yegor Bugayenko (yegor@teamed.io) | |
| 55 | * @version $Id: 56ec78353d55e0139ef76386f5e5cca4391304e7 $ | |
| 56 | * @since 0.1 | |
| 57 | */ | |
| 58 | 0 | @ToString |
| 59 | 0 | @EqualsAndHashCode(of = "throwable") |
| 60 | final class ExceptionDecor implements Formattable { | |
| 61 | ||
| 62 | /** | |
| 63 | * The exception. | |
| 64 | */ | |
| 65 | private final transient Throwable throwable; | |
| 66 | ||
| 67 | /** | |
| 68 | * Public ctor. | |
| 69 | * @param thr The exception | |
| 70 | */ | |
| 71 | 0 | ExceptionDecor(final Throwable thr) { |
| 72 | 0 | this.throwable = thr; |
| 73 | 0 | } |
| 74 | ||
| 75 | /** | |
| 76 | * {@inheritDoc} | |
| 77 | * @checkstyle ParameterNumber (4 lines) | |
| 78 | */ | |
| 79 | @Override | |
| 80 | public void formatTo(final Formatter formatter, final int flags, | |
| 81 | final int width, final int precision) { | |
| 82 | final String text; | |
| 83 | 0 | if (this.throwable == null) { |
| 84 | 0 | text = "NULL"; |
| 85 | 0 | } else if ((flags & FormattableFlags.ALTERNATE) == 0) { |
| 86 | 0 | final StringWriter writer = new StringWriter(); |
| 87 | 0 | this.throwable.printStackTrace(new PrintWriter(writer)); |
| 88 | 0 | text = writer.toString(); |
| 89 | 0 | } else { |
| 90 | 0 | text = this.throwable.getMessage(); |
| 91 | } | |
| 92 | 0 | formatter.format("%s", text); |
| 93 | 0 | } |
| 94 | ||
| 95 | } |