-
Notifications
You must be signed in to change notification settings - Fork 214
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Added converters/tests for Color, Dimension, InetAddress, Locale, Pat…
…tern, and Point.
- Loading branch information
Showing
13 changed files
with
1,092 additions
and
1 deletion.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
212 changes: 212 additions & 0 deletions
212
src/main/java/org/apache/commons/beanutils2/converters/ColorConverter.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,212 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the License is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| * KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
| package org.apache.commons.beanutils2.converters; | ||
|
|
||
| import java.awt.Color; | ||
| import java.util.Objects; | ||
|
|
||
| /** | ||
| * <p>Converts a configuration property into a Java {@link Color} object.</p> | ||
| * | ||
| * <p> | ||
| * This converter aims to be compatible with some some of the web color | ||
| * formats supported by browsers with CSS, rather than only support | ||
| * literal interpretations of numbers, such as: | ||
| * </p> | ||
| * | ||
| * <ul> | ||
| * <li>#RGB</li> | ||
| * <li>#RGBA</li> | ||
| * <li>#RRGGBBAA</li> | ||
| * </ul> | ||
| * | ||
| * <p> | ||
| * This converter will use the web based hexadecimal interpretations if | ||
| * the value is prefixed with {@link #HEX_COLOR_PREFIX}. | ||
| * | ||
| * If using a literal number, or {@link Color#decode(String)} is desired, you must | ||
| * prefix your value with <code>0x</code> instead of {@link #HEX_COLOR_PREFIX}. | ||
| * </p> | ||
| * | ||
| * @since 2.0.0 | ||
| */ | ||
| public class ColorConverter extends AbstractConverter { | ||
|
|
||
| /** To be a web based hexadecimal color, it must be prefixed with this. */ | ||
| private static final String HEX_COLOR_PREFIX = "#"; | ||
|
|
||
| /** | ||
| * Construct a <b>{@link Color}</b> <i>Converter</i> that throws | ||
| * a {@code ConversionException} if an error occurs. | ||
| */ | ||
| public ColorConverter() { | ||
| super(); | ||
| } | ||
|
|
||
| /** | ||
| * @param defaultValue The default value to be returned | ||
| * if the value to be converted is missing or an error | ||
| * occurs converting the value. | ||
| */ | ||
| public ColorConverter(final Object defaultValue) { | ||
| super(defaultValue); | ||
| } | ||
|
|
||
| @Override | ||
| protected Class<?> getDefaultType() { | ||
| return Color.class; | ||
| } | ||
|
|
||
| /** | ||
| * <p> | ||
| * Convert the configuration value to a Java {@link Color} object, | ||
| * by reading the hexadecimal {@link String} and converting each component. | ||
| * </p> | ||
| * | ||
| * <p> | ||
| * This can also interpret raw color names based on the standard colors | ||
| * defined in Java, such as the following: | ||
| * </p> | ||
| * | ||
| * <ul> | ||
| * <li>{@link Color#WHITE}</li> | ||
| * <li>{@link Color#LIGHT_GRAY}</li> | ||
| * <li>{@link Color#GRAY}</li> | ||
| * <li>{@link Color#DARK_GRAY}</li> | ||
| * <li>{@link Color#BLACK}</li> | ||
| * <li>{@link Color#RED}</li> | ||
| * <li>{@link Color#PINK}</li> | ||
| * <li>{@link Color#ORANGE}</li> | ||
| * <li>{@link Color#YELLOW}</li> | ||
| * <li>{@link Color#GREEN}</li> | ||
| * <li>{@link Color#MAGENTA}</li> | ||
| * <li>{@link Color#CYAN}</li> | ||
| * <li>{@link Color#BLUE}</li> | ||
| * </ul> | ||
| * | ||
| * <small> | ||
| * Implementation Notes: We specifically avoid the use of {@link Color#decode(String)} | ||
| * for hexadecimal {@link String}s starting with {@link #HEX_COLOR_PREFIX} | ||
| * as it does not provide the desired result. | ||
| * The {@link Color#decode(String)} method uses {@link Integer#decode(String)} | ||
| * under the hood to convert the input to a number, which means input like | ||
| * <code>#FFF</code> gets interpreted incorrectly as it's literally converted | ||
| * to the number <code>0xFFF</code>, rather than the color, <code>#FFFFFF</code> which | ||
| * it is short hand for. It also doesn't work for <code>#FFFFFFFF</code> due to it | ||
| * being unable to parse as an {@link Integer}. | ||
| * If this is desired, then this method falls back to using {@link Color#decode(String)}, | ||
| * so for literal hexadecimal values you prefix it with <code>0x</code> instead of | ||
| * {@link #HEX_COLOR_PREFIX}. | ||
| * </small> | ||
| * | ||
| * @param value The String property value to convert. | ||
| * @return A {@link Color} which represents the compiled configuration property. | ||
| * @throws NullPointerException If the value is null. | ||
| * @throws NumberFormatException If an invalid number is provided. | ||
| */ | ||
| @Override | ||
| protected <T> T convertToType(Class<T> type, Object value) throws Throwable { | ||
| Objects.requireNonNull(value, "Value can't be null."); | ||
| final String stringValue = value.toString(); | ||
|
|
||
| switch (stringValue.toLowerCase()) { | ||
| case "white": | ||
| return type.cast(Color.WHITE); | ||
| case "lightgray": | ||
| return type.cast(Color.LIGHT_GRAY); | ||
| case "gray": | ||
| return type.cast(Color.GRAY); | ||
| case "darkgray": | ||
| return type.cast(Color.DARK_GRAY); | ||
| case "black": | ||
| return type.cast(Color.BLACK); | ||
| case "red": | ||
| return type.cast(Color.RED); | ||
| case "pink": | ||
| return type.cast(Color.PINK); | ||
| case "orange": | ||
| return type.cast(Color.ORANGE); | ||
| case "yellow": | ||
| return type.cast(Color.YELLOW); | ||
| case "green": | ||
| return type.cast(Color.GREEN); | ||
| case "magenta": | ||
| return type.cast(Color.MAGENTA); | ||
| case "cyan": | ||
| return type.cast(Color.CYAN); | ||
| case "blue": | ||
| return type.cast(Color.BLUE); | ||
| default: | ||
| // Do nothing. | ||
| } | ||
|
|
||
| if (stringValue.startsWith(HEX_COLOR_PREFIX)) { | ||
| return type.cast(parseWebColor(stringValue)); | ||
| } | ||
|
|
||
| return type.cast(Color.decode(stringValue)); | ||
| } | ||
|
|
||
| /** | ||
| * <small> | ||
| * Implementation Notes: This must return a {@link Color}; not a {@link Number} | ||
| * or {@link String} for {@link Color#decode(String)} as it is not capable of supporting | ||
| * a color alpha channel due to the limited range of an {@link Integer}. | ||
| * </small> | ||
| * | ||
| * @param value The web friendly hexadecimal {@link String}. | ||
| * @return The Java friendly {@link Color} this color represents. | ||
| * @throws NumberFormatException If the hexadecimal input contains non parsable characters. | ||
| */ | ||
| private Color parseWebColor(final String value) { | ||
| Objects.requireNonNull(value); | ||
|
|
||
| switch (value.length()) { | ||
| case 4: | ||
| return new Color( | ||
| Integer.parseInt(value.substring(1, 2), 16) * 17, | ||
| Integer.parseInt(value.substring(2, 3), 16) * 17, | ||
| Integer.parseInt(value.substring(3, 4), 16) * 17 | ||
| ); | ||
| case 5: | ||
| return new Color( | ||
| Integer.parseInt(value.substring(1, 2), 16) * 17, | ||
| Integer.parseInt(value.substring(2, 3), 16) * 17, | ||
| Integer.parseInt(value.substring(3, 4), 16) * 17, | ||
| Integer.parseInt(value.substring(4, 5), 16) * 17 | ||
| ); | ||
| case 7: | ||
| return new Color( | ||
| Integer.parseInt(value.substring(1, 3), 16), | ||
| Integer.parseInt(value.substring(3, 5), 16), | ||
| Integer.parseInt(value.substring(5, 7), 16) | ||
| ); | ||
| case 9: | ||
| return new Color( | ||
| Integer.parseInt(value.substring(1, 3), 16), | ||
| Integer.parseInt(value.substring(3, 5), 16), | ||
| Integer.parseInt(value.substring(5, 7), 16), | ||
| Integer.parseInt(value.substring(7, 9), 16) | ||
| ); | ||
| default: | ||
| throw new IllegalArgumentException("Invalid hexadecimal color provided, if literal value decoding " + | ||
| "is required, specify 0x instead of #, otherwise expecting 3, 4, 6, or 8 characters only."); | ||
| } | ||
| } | ||
| } |
Oops, something went wrong.