Package com.fasterxml.jackson.core

Class StreamWriteConstraints

java.lang.Object

com.fasterxml.jackson.core.StreamWriteConstraints

All Implemented Interfaces:

Serializable

public class StreamWriteConstraints
extends Object
implements Serializable

The constraints to use for streaming writes: used to guard against problematic output by preventing processing of "too big" output constructs (values, structures). Constraints are registered with TokenStreamFactory (such as JsonFactory); if nothing explicitly specified, default constraints are used.

Currently constrained aspects, with default settings, are:

• Maximum Nesting depth: default 1000 (see DEFAULT_MAX_DEPTH)

Since:

2.16

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	StreamWriteConstraints.Builder

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_MAX_DEPTH	Default setting for maximum depth: see StreamWriteConstraints.Builder.maxNestingDepth(int) for details.

Method Summary

Modifier and Type	Method	Description
static StreamWriteConstraints.Builder	builder()
static StreamWriteConstraints	defaults()
int	getMaxNestingDepth()	Accessor for maximum depth.
static void	overrideDefaultStreamWriteConstraints(StreamWriteConstraints streamWriteConstraints)	Override the default StreamWriteConstraints.
StreamWriteConstraints.Builder	rebuild()
void	validateNestingDepth(int depth)	Convenience method that can be used to verify that the nesting depth does not exceed the maximum specified by this constraints object: if it does, a StreamConstraintsException is thrown.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

DEFAULT_MAX_DEPTH

public static final int DEFAULT_MAX_DEPTH

Default setting for maximum depth: see StreamWriteConstraints.Builder.maxNestingDepth(int) for details.

See Also:

• Constant Field Values

Method Details

overrideDefaultStreamWriteConstraints

public static void overrideDefaultStreamWriteConstraints(StreamWriteConstraints streamWriteConstraints)

Override the default StreamWriteConstraints. These defaults are only used when JsonFactory instances are not configured with their own StreamWriteConstraints.

Library maintainers should not set this as it will affect other code that uses Jackson. Library maintainers who want to configure StreamWriteConstraints for the Jackson usage within their lib should create ObjectMapper instances that have a JsonFactory instance with the required StreamWriteConstraints.

This method is meant for users delivering applications. If they use this, they set it when they start their application to avoid having other code initialize their mappers before the defaults are overridden.

Parameters:

streamWriteConstraints - new default for StreamWriteConstraints (a null value will reset to built-in default)

See Also:

• defaults()
• builder()

builder

public static StreamWriteConstraints.Builder builder()

defaults

public static StreamWriteConstraints defaults()

Returns:

the default StreamWriteConstraints (when none is set on the JsonFactory explicitly)

See Also:

• overrideDefaultStreamWriteConstraints(StreamWriteConstraints)

rebuild

public StreamWriteConstraints.Builder rebuild()

Returns:

New StreamWriteConstraints.Builder initialized with settings of this constraints instance

getMaxNestingDepth

public int getMaxNestingDepth()

Accessor for maximum depth. see StreamWriteConstraints.Builder.maxNestingDepth(int) for details.

Returns:

Maximum allowed depth

validateNestingDepth

public void validateNestingDepth(int depth)
                          throws StreamConstraintsException

Convenience method that can be used to verify that the nesting depth does not exceed the maximum specified by this constraints object: if it does, a StreamConstraintsException is thrown.

Parameters:

depth - count of unclosed objects and arrays

Throws:

StreamConstraintsException - If depth exceeds maximum