StreamWriteFeature (jackson-core 2.18.1)

java.lang.Object
- java.lang.Enum<StreamWriteFeature>
- - com.fasterxml.jackson.core.StreamWriteFeature

All Implemented Interfaces:

JacksonFeature, Serializable, Comparable<StreamWriteFeature>
```
public enum StreamWriteFeature
extends Enum<StreamWriteFeature>
implements JacksonFeature
```
Token writer (generator) features not-specific to any particular format backend. Eventual replacement for non-JSON-specific JsonGenerator.Features.

Since:

2.10

Enum Constant Summary

Enum Constants
Enum Constant and Description
`AUTO_CLOSE_CONTENT` Feature that determines what happens when the generator is closed while there are still unmatched `JsonToken.START_ARRAY` or `JsonToken.START_OBJECT` entries in output content.
`AUTO_CLOSE_TARGET` Feature that determines whether generator will automatically close underlying output target that is NOT owned by the generator.
`FLUSH_PASSED_TO_STREAM` Feature that specifies that calls to `JsonGenerator.flush()` will cause matching `flush()` to underlying `OutputStream` or `Writer`; if disabled this will not be done.
`IGNORE_UNKNOWN` Feature that determines what to do if the underlying data format requires knowledge of all properties to output, and if no definition is found for a property that caller tries to write.
`STRICT_DUPLICATE_DETECTION` Feature that determines whether `JsonGenerator` will explicitly check that no duplicate JSON Object field names are written.
`USE_FAST_DOUBLE_WRITER` Feature that determines whether to use standard Java code to write floats/doubles (default) or use the Schubfach algorithm which may be faster (but see the next paragraph for details).
`WRITE_BIGDECIMAL_AS_PLAIN` Feature that determines whether `BigDecimal` entries are serialized using `BigDecimal.toPlainString()` to prevent values to be written using scientific notation.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`static int`	`collectDefaults()` Method that calculates bit set (flags) of all features that are enabled by default.
`boolean`	`enabledByDefault()` Accessor for checking whether this feature is enabled by default.
`boolean`	`enabledIn(int flags)` Convenience method for checking whether feature is enabled in given bitmask.
`int`	`getMask()` Returns bit mask for this feature instance; must be a single bit, that is of form `1 << N`.
`JsonGenerator.Feature`	`mappedFeature()`
`static StreamWriteFeature`	`valueOf(String name)` Returns the enum constant of this type with the specified name.
`static StreamWriteFeature[]`	`values()` Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Enum Constant Detail
  - AUTO_CLOSE_TARGET
```
public static final StreamWriteFeature AUTO_CLOSE_TARGET
```
    Feature that determines whether generator will automatically close underlying output target that is NOT owned by the generator. If disabled, calling application has to separately close the underlying OutputStream and Writer instances used to create the generator. If enabled, generator will handle closing, as long as generator itself gets closed: this happens when end-of-input is encountered, or generator is closed by a call to JsonGenerator.close().
    Feature is enabled by default.
  - AUTO_CLOSE_CONTENT
```
public static final StreamWriteFeature AUTO_CLOSE_CONTENT
```
    Feature that determines what happens when the generator is closed while there are still unmatched JsonToken.START_ARRAY or JsonToken.START_OBJECT entries in output content. If enabled, such Array(s) and/or Object(s) are automatically closed (that is, matching END_ token write call is made for all open scopes); if disabled, no additional write calls are made.
    Feature is enabled by default.
  - FLUSH_PASSED_TO_STREAM
```
public static final StreamWriteFeature FLUSH_PASSED_TO_STREAM
```
    Feature that specifies that calls to JsonGenerator.flush() will cause matching flush() to underlying OutputStream or Writer; if disabled this will not be done. Main reason to disable this feature is to prevent flushing at generator level, if it is not possible to prevent method being called by other code (like ObjectMapper or third party libraries).
    Feature is enabled by default.
  - WRITE_BIGDECIMAL_AS_PLAIN
```
public static final StreamWriteFeature WRITE_BIGDECIMAL_AS_PLAIN
```
    Feature that determines whether BigDecimal entries are serialized using BigDecimal.toPlainString() to prevent values to be written using scientific notation.
    NOTE: only affects generators that serialize BigDecimals using textual representation (textual formats but potentially some binary formats).
    Feature is disabled by default, so default output mode is used; this generally depends on how BigDecimal has been created.
  - STRICT_DUPLICATE_DETECTION
```
public static final StreamWriteFeature STRICT_DUPLICATE_DETECTION
```
    Feature that determines whether JsonGenerator will explicitly check that no duplicate JSON Object field names are written. If enabled, generator will check all names within context and report duplicates by throwing a JsonGenerationException; if disabled, no such checking will be done. Assumption in latter case is that caller takes care of not trying to write duplicate names.
    Note that enabling this feature will incur performance overhead due to having to store and check additional information.
    Feature is disabled by default.
  - IGNORE_UNKNOWN
```
public static final StreamWriteFeature IGNORE_UNKNOWN
```
    Feature that determines what to do if the underlying data format requires knowledge of all properties to output, and if no definition is found for a property that caller tries to write. If enabled, such properties will be quietly ignored; if disabled, a JsonProcessingException will be thrown to indicate the problem. Typically most textual data formats do NOT require schema information (although some do, such as CSV), whereas many binary data formats do require definitions (such as Avro, protobuf), although not all (Smile, CBOR, BSON and MessagePack do not).
    Note that support for this feature is implemented by individual data format module, if (and only if) it makes sense for the format in question. For JSON, for example, this feature has no effect as properties need not be pre-defined.
    Feature is disabled by default, meaning that if the underlying data format requires knowledge of all properties to output, attempts to write an unknown property will result in a JsonProcessingException
  - USE_FAST_DOUBLE_WRITER
```
public static final StreamWriteFeature USE_FAST_DOUBLE_WRITER
```
    Feature that determines whether to use standard Java code to write floats/doubles (default) or use the Schubfach algorithm which may be faster (but see the next paragraph for details). Schubfach algorithm output may have small differences in the precision of the float/double that compared to JDK default processing.
    NOTE! Enabling this feature appears to improve performance significantly up to and including JDK 17, but NOT when using JDK 21 and above -- in fact, it seems that JDK implementation is slightly faster. Because of this,enabling this feature is only recommended for JDKs 17 and below.
    Feature is disabled by default, meaning that JDK default conversions are used.
    
    Since:
    
    2.14
- Method Detail
  - values
```
public static StreamWriteFeature[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
```
for (StreamWriteFeature c : StreamWriteFeature.values())
    System.out.println(c);
```
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static StreamWriteFeature valueOf(String name)
```
    Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
    
    Parameters:
    
    name - the name of the enum constant to be returned.
    
    Returns:
    
    the enum constant with the specified name
    
    Throws:
    
    IllegalArgumentException - if this enum type has no constant with the specified name
    
    NullPointerException - if the argument is null
  - collectDefaults
```
public static int collectDefaults()
```
    Method that calculates bit set (flags) of all features that are enabled by default.
    
    Returns:
    
    Bit mask of all features that are enabled by default
  - enabledByDefault
```
public boolean enabledByDefault()
```
    Description copied from interface: JacksonFeature
    
    Accessor for checking whether this feature is enabled by default.
    
    Specified by:
    
    enabledByDefault in interface JacksonFeature
    
    Returns:
    
    Whether this instance is enabled by default or not
  - enabledIn
```
public boolean enabledIn(int flags)
```
    Description copied from interface: JacksonFeature
    
    Convenience method for checking whether feature is enabled in given bitmask.
    
    Specified by:
    
    enabledIn in interface JacksonFeature
    
    Parameters:
    
    flags - Bit field that contains a set of enabled features of this type
    
    Returns:
    
    True if this feature is enabled in passed bit field
  - getMask
```
public int getMask()
```
    Description copied from interface: JacksonFeature
    
    Returns bit mask for this feature instance; must be a single bit, that is of form 1 << N.
    
    Specified by:
    
    getMask in interface JacksonFeature
    
    Returns:
    
    Bit mask of this feature
  - mappedFeature
```
public JsonGenerator.Feature mappedFeature()
```

Enum StreamWriteFeature

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Enum

Methods inherited from class java.lang.Object

Enum Constant Detail

AUTO_CLOSE_TARGET

AUTO_CLOSE_CONTENT

FLUSH_PASSED_TO_STREAM

WRITE_BIGDECIMAL_AS_PLAIN

STRICT_DUPLICATE_DETECTION

IGNORE_UNKNOWN

USE_FAST_DOUBLE_WRITER

Method Detail

values

valueOf

collectDefaults

enabledByDefault

enabledIn

getMask

mappedFeature