spring DataUnit 源码
spring DataUnit 代码
文件路径：/spring-core/src/main/java/org/springframework/util/unit/DataUnit.java
/*
* Copyright 2002-2019 the original author or authors.
*
* Licensed 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
*
* https://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.springframework.util.unit;
/**
* A standard set of {@link DataSize} units.
*
* <p>The unit prefixes used in this class are
* <a href="https://en.wikipedia.org/wiki/Binary_prefix">binary prefixes</a>
* indicating multiplication by powers of 2. The following table displays the
* enum constants defined in this class and corresponding values.
*
* <p>
* <table border="1">
* <tr><th>Constant</th><th>Data Size</th><th>Power of 2</th><th>Size in Bytes</th></tr>
* <tr><td>{@link #BYTES}</td><td>1B</td><td>2^0</td><td>1</td></tr>
* <tr><td>{@link #KILOBYTES}</td><td>1KB</td><td>2^10</td><td>1,024</td></tr>
* <tr><td>{@link #MEGABYTES}</td><td>1MB</td><td>2^20</td><td>1,048,576</td></tr>
* <tr><td>{@link #GIGABYTES}</td><td>1GB</td><td>2^30</td><td>1,073,741,824</td></tr>
* <tr><td>{@link #TERABYTES}</td><td>1TB</td><td>2^40</td><td>1,099,511,627,776</td></tr>
* </table>
*
* @author Stephane Nicoll
* @author Sam Brannen
* @since 5.1
* @see DataSize
*/
public enum DataUnit {
/**
* Bytes, represented by suffix {@code B}.
*/
BYTES("B", DataSize.ofBytes(1)),
/**
* Kilobytes, represented by suffix {@code KB}.
*/
KILOBYTES("KB", DataSize.ofKilobytes(1)),
/**
* Megabytes, represented by suffix {@code MB}.
*/
MEGABYTES("MB", DataSize.ofMegabytes(1)),
/**
* Gigabytes, represented by suffix {@code GB}.
*/
GIGABYTES("GB", DataSize.ofGigabytes(1)),
/**
* Terabytes, represented by suffix {@code TB}.
*/
TERABYTES("TB", DataSize.ofTerabytes(1));
private final String suffix;
private final DataSize size;
DataUnit(String suffix, DataSize size) {
this.suffix = suffix;
this.size = size;
}
DataSize size() {
return this.size;
}
/**
* Return the {@link DataUnit} matching the specified {@code suffix}.
* @param suffix one of the standard suffixes
* @return the {@link DataUnit} matching the specified {@code suffix}
* @throws IllegalArgumentException if the suffix does not match the suffix
* of any of this enum's constants
*/
public static DataUnit fromSuffix(String suffix) {
for (DataUnit candidate : values()) {
if (candidate.suffix.equals(suffix)) {
return candidate;
}
}
throw new IllegalArgumentException("Unknown data unit suffix '" + suffix + "'");
}
}
相关信息
相关文章
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦