com.google.common.base.Enums类的使用及代码示例

x33g5p2x  于2022-01-19 转载在 其他  
字(7.2k)|赞(0)|评价(0)|浏览(282)

本文整理了Java中com.google.common.base.Enums类的一些代码示例，展示了Enums类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Enums类的具体详情如下：
包路径：com.google.common.base.Enums
类名称：Enums

Enums介绍

[英]Utility methods for working with Enum instances.
[中]用于处理枚举实例的实用程序方法。

代码示例

代码示例来源：origin: pentaho/pentaho-kettle

/**
  * [PDI-15575] Ensuring that this enum can return with some default value. Necessary for when being used on the
  * GUI side if a user leaves the field empty, it will enforce a default value. This allows the object to be saved,
  * loaded, and cloned as necessary.
  * @param contentType
  * @return ContentType
  */
 public static ContentType getIfPresent( String contentType ) {
  return Enums.getIfPresent( ContentType.class, contentType ).or( Element );
 }
}

代码示例来源：origin: google/guava

static <T extends Enum<T>> Optional<T> getEnumIfPresent(Class<T> enumClass, String value) {
 WeakReference<? extends Enum<?>> ref = Enums.getEnumConstants(enumClass).get(value);
 return ref == null ? Optional.<T>absent() : Optional.of(enumClass.cast(ref.get()));
}

代码示例来源：origin: google/guava

@GwtIncompatible // java.lang.ref.WeakReference
static <T extends Enum<T>> Map<String, WeakReference<? extends Enum<?>>> getEnumConstants(
  Class<T> enumClass) {
 synchronized (enumConstantCache) {
  Map<String, WeakReference<? extends Enum<?>>> constants = enumConstantCache.get(enumClass);
  if (constants == null) {
   constants = populateCache(enumClass);
  }
  return constants;
 }
}

代码示例来源：origin: google/guava

public void testStringConverter_serialization() {
 SerializableTester.reserializeAndAssert(Enums.stringConverter(TestEnum.class));
}

代码示例来源：origin: google/guava

@GwtIncompatible // Class.getName()
public void testStringConverter_toString() {
 assertEquals(
   "Enums.stringConverter(com.google.common.base.EnumsTest$TestEnum.class)",
   Enums.stringConverter(TestEnum.class).toString());
}

代码示例来源：origin: google/error-prone

private static Optional<TimeUnit> getTimeUnit(ExpressionTree timeUnit) {
  if (timeUnit instanceof IdentifierTree) { // e.g., SECONDS
   return Enums.getIfPresent(TimeUnit.class, ((IdentifierTree) timeUnit).getName().toString());
  }
  if (timeUnit instanceof MemberSelectTree) { // e.g., TimeUnit.SECONDS
   return Enums.getIfPresent(
     TimeUnit.class, ((MemberSelectTree) timeUnit).getIdentifier().toString());
  }
  return Optional.absent();
 }
}

代码示例来源：origin: google/j2objc

@GwtIncompatible // java.lang.ref.WeakReference
static <T extends Enum<T>> Map<String, WeakReference<? extends Enum<?>>> getEnumConstants(
  Class<T> enumClass) {
 synchronized (enumConstantCache) {
  Map<String, WeakReference<? extends Enum<?>>> constants = enumConstantCache.get(enumClass);
  if (constants == null) {
   constants = populateCache(enumClass);
  }
  return constants;
 }
}

代码示例来源：origin: google/j2objc

static <T extends Enum<T>> Optional<T> getEnumIfPresent(Class<T> enumClass, String value) {
 WeakReference<? extends Enum<?>> ref = Enums.getEnumConstants(enumClass).get(value);
 return ref == null ? Optional.<T>absent() : Optional.of(enumClass.cast(ref.get()));
}

代码示例来源：origin: google/guava

public void testStringConverter_convertError() {
 Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);
 try {
  converter.convert("xxx");
  fail();
 } catch (IllegalArgumentException expected) {
 }
}

代码示例来源：origin: apache/incubator-gobblin

private static Optional<Deserializers> getDeserializerType(Properties props) {
 Preconditions.checkArgument(props.containsKey(KAFKA_DESERIALIZER_TYPE),
   "Missing required property " + KAFKA_DESERIALIZER_TYPE);
 return Enums.getIfPresent(Deserializers.class, props.getProperty(KAFKA_DESERIALIZER_TYPE).toUpperCase());
}

代码示例来源：origin: wildfly/wildfly

@GwtIncompatible // java.lang.ref.WeakReference
static <T extends Enum<T>> Map<String, WeakReference<? extends Enum<?>>> getEnumConstants(
  Class<T> enumClass) {
 synchronized (enumConstantCache) {
  Map<String, WeakReference<? extends Enum<?>>> constants = enumConstantCache.get(enumClass);
  if (constants == null) {
   constants = populateCache(enumClass);
  }
  return constants;
 }
}

代码示例来源：origin: wildfly/wildfly

static <T extends Enum<T>> Optional<T> getEnumIfPresent(Class<T> enumClass, String value) {
 WeakReference<? extends Enum<?>> ref = Enums.getEnumConstants(enumClass).get(value);
 return ref == null ? Optional.<T>absent() : Optional.of(enumClass.cast(ref.get()));
}

代码示例来源：origin: google/guava

@GwtIncompatible // NullPointerTester
public void testStringConverter_nullPointerTester() throws Exception {
 Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);
 NullPointerTester tester = new NullPointerTester();
 tester.testAllPublicInstanceMethods(converter);
}

代码示例来源：origin: apache/incubator-gobblin

/**
  * Return the {@link TaskSchedulerType} with the specified name. If the specified name
  * does not map to a {@link TaskSchedulerType}, then {@link #SCHEDULEDEXECUTORSERVICE}
  * will be returned.
  *
  * @param name the name of the {@link TaskSchedulerType}
  * @return the specified {@link TaskSchedulerType} or {@link #SCHEDULEDEXECUTORSERVICE}
  */
 public static TaskSchedulerType parse(String name) {
  if (StringUtils.isEmpty(name)) {
   return SCHEDULEDEXECUTORSERVICE;
  }
  return Enums.getIfPresent(TaskSchedulerType.class, name.toUpperCase()).or(SCHEDULEDEXECUTORSERVICE);
 }
}

代码示例来源：origin: com.google.guava/guava-jdk5

@GwtIncompatible("java.lang.ref.WeakReference")
static <T extends Enum<T>> Map<String, WeakReference<? extends Enum<?>>> getEnumConstants(
  Class<T> enumClass) {
 synchronized (enumConstantCache) {
  Map<String, WeakReference<? extends Enum<?>>> constants =
    enumConstantCache.get(enumClass);
  if (constants == null) {
   constants = populateCache(enumClass);
  }
  return constants;
 }
}

代码示例来源：origin: com.diffplug.guava/guava-core

static <T extends Enum<T>> Optional<T> getEnumIfPresent(Class<T> enumClass, String value) {
    WeakReference<? extends Enum<?>> ref = Enums.getEnumConstants(enumClass).get(value);
    return ref == null
        ? Optional.<T> absent()
        : Optional.of(enumClass.cast(ref.get()));
  }
}

代码示例来源：origin: google/guava

public void testStringConverter_nullConversions() {
 Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);
 assertNull(converter.convert(null));
 assertNull(converter.reverse().convert(null));
}

代码示例来源：origin: google/guava

public void testGetIfPresent_caseSensitive() {
 assertThat(Enums.getIfPresent(TestEnum.class, "cHEETO")).isAbsent();
 assertThat(Enums.getIfPresent(TestEnum.class, "Honda")).isAbsent();
 assertThat(Enums.getIfPresent(TestEnum.class, "poodlE")).isAbsent();
}

代码示例来源：origin: com.diffplug.guava/guava-core

@GwtIncompatible("java.lang.ref.WeakReference")
static <T extends Enum<T>> Map<String, WeakReference<? extends Enum<?>>> getEnumConstants(
    Class<T> enumClass) {
  synchronized (enumConstantCache) {
    Map<String, WeakReference<? extends Enum<?>>> constants = enumConstantCache.get(enumClass);
    if (constants == null) {
      constants = populateCache(enumClass);
    }
    return constants;
  }
}

代码示例来源：origin: com.google.guava/guava-jdk5

static <T extends Enum<T>> Optional<T> getEnumIfPresent(Class<T> enumClass, String value) {
  WeakReference<? extends Enum<?>> ref = Enums.getEnumConstants(enumClass).get(value);
  return ref == null
    ? Optional.<T>absent()
    : Optional.of(enumClass.cast(ref.get()));
 }
}

内容来源于网络，如有侵权，请联系作者删除！

Enums

相关文章

    查看更多

    热门标签

    更多
    JavaquerypythonNode开发语言requestUtil数据库Table后端算法LoggerMessageElementParser

    最新文章

    更多
    • 蜀ICP备2022004421号-2 NULL123 https://www.null123.com © All rights reserved
    • 本站内容来源互联网,如果侵犯您的权益请联系我们删除, 联系方式：448109455@qq.com