本文整理了Java中com.google.cloud.datastore.Value类的一些代码示例，展示了Value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。Value类的具体详情如下：
包路径：com.google.cloud.datastore.Value
类名称：Value

Value介绍

[英]Base class for all Google Cloud Datastore value types. All values must be associated with a non-null content (except NullValue). All values are immutable (including their content). To edit (a copy) use #toBuilder(). Unsupported value (deprecated or unrecognized) would be represented by RawValue.
[中]

代码示例

代码示例来源：origin: googleapis/google-cloud-java

/**
 * Returns the property value as a double.
 *
 * @throws DatastoreException if no such property
 * @throws ClassCastException if value is not a double
 */
@SuppressWarnings("unchecked")
public double getDouble(String name) {
 return ((Value<Double>) getValue(name)).get();
}

代码示例来源：origin: googleapis/google-cloud-java

@SuppressWarnings({"unchecked", "deprecation"})
 @Test
 public void testToBuilder() throws Exception {
  Set<String> content = Collections.singleton("bla");
  @SuppressWarnings("rawtypes")
  ValueBuilder builder = new TestBuilder();
  builder.setMeaning(1).set(content).setExcludeFromIndexes(true);
  Value<?> value = builder.build();
  builder = value.toBuilder();
  assertEquals(1, value.getMeaning());
  assertTrue(value.excludeFromIndexes());
  assertEquals(ValueType.LIST, value.getType());
  assertEquals(content, value.get());
  assertEquals(value, builder.build());
 }
}

代码示例来源：origin: googleapis/google-cloud-java

@Override
public B mergeFrom(P other) {
 excludeFromIndexes = other.excludeFromIndexes();
 meaning = other.getMeaning();
 set(other.get());
 return self();
}

代码示例来源：origin: googleapis/google-cloud-java

@SuppressWarnings({"unchecked", "deprecation"})
@Override
public Blob getBlob(String name) {
 Value<?> value = getValue(name);
 if (value.getMeaning() == 18 && value instanceof StringValue) {
  return new Blob(ByteString.copyFromUtf8(getString(name)));
 }
 return ((Value<Blob>) value).get();
}

代码示例来源：origin: googleapis/google-cloud-java

@SuppressWarnings("deprecation")
@Override
public final com.google.datastore.v1.Value toProto(P value) {
 com.google.datastore.v1.Value.Builder builder = com.google.datastore.v1.Value.newBuilder();
 builder.setExcludeFromIndexes(value.excludeFromIndexes());
 builder.setMeaning(value.getMeaning());
 setValue(value, builder);
 return builder.build();
}

代码示例来源：origin: googleapis/google-cloud-java

@Test
public void testGet() throws Exception {
 for (Map.Entry<ValueType, Value<?>> entry : typeToValue.entrySet()) {
  ValueType valueType = entry.getKey();
  Value<?> value = entry.getValue();
  assertEquals(TYPES.get(valueType)[1], value.get());
 }
 TestBuilder builder = new TestBuilder();
 Set<String> value = Collections.singleton("bla");
 assertEquals(value, builder.set(value).build().get());
}

代码示例来源：origin: objectify/objectify

@Override
protected Number loadValue(final Value<Double> value, final LoadContext ctx, final Path path) throws SkipException {
  if (value.getType() == ValueType.STRING) {
    try {
      return coerceNumber(Double.valueOf(((Value<String>)(Value)value).get()), clazz);
    } catch (NumberFormatException ex) {}
  }
  else {
    return coerceNumber(value.get(), clazz);
  }
  path.throwIllegalState("Don't know how to translate " + value + " to a number");
  return null;	// never gets here
}

代码示例来源：origin: spring-cloud/spring-cloud-gcp

@SuppressWarnings("unchecked")
  public <T> T getPropertyValue(String fieldName, EmbeddedType embeddedType, TypeInformation targetTypeInformation) {
    if (!this.entity.contains(fieldName)) {
      return null;
    }

    try {
      return this.conversion.convertOnRead(this.entity.getValue(fieldName).get(),
          embeddedType, targetTypeInformation);
    }
    catch (ConversionException | DatastoreDataException ex) {
      throw new DatastoreDataException("Unable to read property " + fieldName, ex);
    }
  }
}

代码示例来源：origin: spring-cloud/spring-cloud-gcp

private static Object getNonEntityObjectFromRow(Object x) {
  Object mappedResult;
  if (x instanceof Key) {
    mappedResult = x;
  }
  else {
    BaseEntity entity = (BaseEntity) x;
    Set<String> colNames = entity.getNames();
    if (colNames.size() > 1) {
      throw new DatastoreDataException(
          "The query method returns non-entity types, but the query result has "
              + "more than one column. Use a Projection entity type instead.");
    }
    mappedResult = entity.getValue((String) colNames.toArray()[0]).get();
  }
  return mappedResult;
}

代码示例来源：origin: googleapis/google-cloud-java

private void addValueHelper(Value<?> value) {
 // see datastore.proto definition for list_value
 Preconditions.checkArgument(value.getType() != ValueType.LIST, "Cannot contain another list");
 listBuilder.add(value);
}

代码示例来源：origin: googleapis/google-cloud-java

@Test
public void testGetList() throws Exception {
 BaseEntity<Key> entity = builder.build();
 List<? extends Value<?>> list = entity.getList("list1");
 assertEquals(3, list.size());
 assertEquals(NullValue.of(), list.get(0));
 assertEquals("foo", list.get(1).get());
 assertEquals(LAT_LNG, list.get(2).get());
 list = entity.getList("list2");
 assertEquals(2, list.size());
 assertEquals(Long.valueOf(10), list.get(0).get());
 assertEquals(Double.valueOf(2), list.get(1).get());
 list = entity.getList("list3");
 assertEquals(1, list.size());
 assertEquals(Boolean.TRUE, list.get(0).get());
 entity = builder.set("list1", ListValue.of(list)).build();
 assertEquals(list, entity.getList("list1"));
 List<Value<?>> stringList = entity.getList("stringList");
 assertEquals(
   ImmutableList.of(StringValue.of("s1"), StringValue.of("s2"), StringValue.of("s3")),
   stringList);
 List<Value<Double>> doubleList = entity.getList("doubleList");
 assertEquals(
   ImmutableList.of(DoubleValue.of(12.3), DoubleValue.of(4.56), DoubleValue.of(.789)),
   doubleList);
 List<EntityValue> entityList = entity.getList("entityList");
 assertEquals(
   ImmutableList.of(EntityValue.of(ENTITY), EntityValue.of(PARTIAL_ENTITY)), entityList);
}

代码示例来源：origin: objectify/objectify

/** @return a value that has the specified index flag (possibly the original itself) */
@SuppressWarnings("unchecked")
public static <D> Value<D> index(final Value<D> original, final boolean index) {
  if (original.excludeFromIndexes() == !index) {
    return original;
  } else {
    return (Value<D>)original.toBuilder().setExcludeFromIndexes(!index).build();
  }
}

代码示例来源：origin: googleapis/google-cloud-java

@Test
public void testExcludeFromIndexes() throws Exception {
 for (Map.Entry<ValueType, Value<?>> entry : typeToValue.entrySet()) {
  assertFalse(entry.getValue().excludeFromIndexes());
 }
 TestBuilder builder = new TestBuilder();
 assertFalse(builder.build().excludeFromIndexes());
 assertTrue(builder.setExcludeFromIndexes(true).build().excludeFromIndexes());
 assertFalse(builder.setExcludeFromIndexes(false).build().excludeFromIndexes());
}

代码示例来源：origin: spring-cloud/spring-cloud-gcp

@Override
  @SuppressWarnings("unchecked")
  public void write(Object source, BaseEntity.Builder sink) {
    DatastorePersistentEntity<?> persistentEntity = this.mappingContext.getPersistentEntity(source.getClass());
    PersistentPropertyAccessor accessor = persistentEntity.getPropertyAccessor(source);
    persistentEntity.doWithColumnBackedProperties(
        (DatastorePersistentProperty persistentProperty) -> {
          try {
            Object val = accessor.getProperty(persistentProperty);
            Value convertedVal = this.conversions.convertOnWrite(val, persistentProperty);

            if (persistentProperty.isUnindexed()) {
              ValueBuilder valueBuilder = convertedVal.toBuilder();
              valueBuilder.setExcludeFromIndexes(true);
              convertedVal = valueBuilder.build();
            }
            sink.set(persistentProperty.getFieldName(), convertedVal);
          }
          catch (DatastoreDataException ex) {
            throw new DatastoreDataException(
                "Unable to write "
                    + persistentEntity.kindName() + "." + persistentProperty.getFieldName(),
                ex);
          }
        });
  }
}

代码示例来源：origin: googleapis/google-cloud-java

@SuppressWarnings("deprecation")
@Test
public void testMeaning() throws Exception {
 TestBuilder builder = new TestBuilder();
 assertEquals(10, builder.setMeaning(10).build().getMeaning());
}

代码示例来源：origin: objectify/objectify

@Override
protected LatLng toPojo(final Value<LatLng> value) {
  return value.get();
}

代码示例来源：origin: objectify/objectify

@Override
protected Number loadValue(final Value<Long> value, final LoadContext ctx, final Path path) throws SkipException {
  // In theory it's a number, but maybe there was a string instead? We'll have to remove the typecheck
  // in the base ValueTranslator class for this to work.
  if (value.getType() == ValueType.STRING) {
    try {
      return coerceNumber(Long.valueOf(((Value<String>)(Value)value).get()), clazz);
    } catch (NumberFormatException ex) {}
  } else {
    return coerceNumber(value.get(), clazz);
  }
  path.throwIllegalState("Don't know how to translate " + value + " to a number");
  return null;	// never gets here
}

代码示例来源：origin: org.springframework.cloud/spring-cloud-gcp-data-datastore

@SuppressWarnings("unchecked")
  public <T> T getPropertyValue(String fieldName, EmbeddedType embeddedType, TypeInformation targetTypeInformation) {
    if (!this.entity.contains(fieldName)) {
      return null;
    }

    try {
      return this.conversion.convertOnRead(this.entity.getValue(fieldName).get(),
          embeddedType, targetTypeInformation);
    }
    catch (ConversionException | DatastoreDataException ex) {
      throw new DatastoreDataException("Unable to read property " + fieldName, ex);
    }
  }
}

代码示例来源：origin: org.springframework.cloud/spring-cloud-gcp-data-datastore

private static Object getNonEntityObjectFromRow(Object x) {
  Object mappedResult;
  if (x instanceof Key) {
    mappedResult = x;
  }
  else {
    BaseEntity entity = (BaseEntity) x;
    Set<String> colNames = entity.getNames();
    if (colNames.size() > 1) {
      throw new DatastoreDataException(
          "The query method returns non-entity types, but the query result has "
              + "more than one column. Use a Projection entity type instead.");
    }
    mappedResult = entity.getValue((String) colNames.toArray()[0]).get();
  }
  return mappedResult;
}

代码示例来源：origin: googleapis/google-cloud-java

@SuppressWarnings({"unchecked", "deprecation"})
@Override
public Timestamp getTimestamp(String name) {
 Value<?> value = getValue(name);
 if (value.getMeaning() == 18 && value instanceof LongValue) {
  return Timestamp.ofTimeMicroseconds(getLong(name));
 }
 return ((Value<Timestamp>) value).get();
}