Package org.openapitools.codegen.utils

Interface JsonCache.Root

All Superinterfaces:

JsonCache

Enclosing interface:

JsonCache

public static interface JsonCache.Root
extends JsonCache

Load/merge/save/flush functionality implemented by the root of a JSON cache hierarchy.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	JsonCache.Root.MergePolicy	Describes cache behaviour when a load method is called for a cache instance that is already loaded.

Nested classes/interfaces inherited from interface org.openapitools.codegen.utils.JsonCache

JsonCache.CacheException, JsonCache.Factory, JsonCache.Root

Method Summary

Modifier and Type	Method	Description
JsonCache.Root	flush(File file)	If the cache is dirty, saves the object graph in JSON format to the specified file.
JsonCache.Root	flush(OutputStream out)	If the cache is dirty, saves the object graph in JSON format to the specified stream.
JsonCache.Root	flushOnShutdown(File file)	Makes a best-effort attempt to ensure that the cache gets flushed to a disk file if dirty on shutdown.
JsonCache.Root	flushOnShutdown(OutputStream out)	Makes a best-effort attempt to ensure that the cache gets flushed to an output stream if dirty on shutdown.
com.fasterxml.jackson.databind.ObjectMapper	getMapper()	Returns the mapper used for JSON-object marshalling and serialisation operations.
JsonCache.Root.MergePolicy	getMergePolicy()	Returns the merge policy that applies when load() is called on a cache that is already loaded.
boolean	isDirty()	Indicates whether the cached has unsaved changes.
JsonCache.Root	load(File file)	Loads the cache from the specified file.
JsonCache.Root	load(InputStream in)	Loads the cache from the specified stream.
JsonCache.Root	mapper(com.fasterxml.jackson.databind.ObjectMapper mapper)	Sets the mapper to use for JSON-object marshalling and serialisation operations.
JsonCache.Root	mergePolicy(JsonCache.Root.MergePolicy policy)	Sets the merge policy that applies when load() is called for a cache that is already loaded.
JsonCache.Root	save(File file)	Saves the object graph in JSON format to the specified file.
JsonCache.Root	save(OutputStream out)	Saves the object graph in JSON format to the specified stream.
JsonCache.Root	unload()	Unloads the object graph, setting the root node to null.

Methods inherited from interface org.openapitools.codegen.utils.JsonCache

add, add, add, add, add, add, add, add, add, add, add, add, add, add, add, add, add, add, child, child, delete, delete, exists, exists, get, get, get, get, getBigDecimal, getBigDecimal, getBigDecimal, getBigDecimal, getBigInteger, getBigInteger, getBigInteger, getBigInteger, getBinary, getBinary, getBinary, getBinary, getBoolean, getBoolean, getBoolean, getBoolean, getDouble, getDouble, getDouble, getDouble, getFloat, getFloat, getFloat, getFloat, getInt, getInt, getInt, getInt, getLong, getLong, getLong, getLong, getNodeType, getNodeType, getNumber, getNumber, getNumber, getNumber, getObject, getObject, getObject, getObject, getObjects, getObjects, getObjects, getObjects, getShort, getShort, getShort, getShort, getString, getString, getString, getString, parent, root, set, set, set, set, set, set, set, set, set, set, set, set, set, set, set, set, set, set, set, set, set, set, size, size

Method Detail

flush

JsonCache.Root flush(File file)
              throws JsonCache.CacheException

If the cache is dirty, saves the object graph in JSON format to the specified file.

Parameters:

file - The output file.

Returns:

The receiver, to allow chaining.

Throws:

JsonCache.CacheException - if the root node does not exist or if unable to create or write the file.

NullPointerException - if file is null.

See Also:

flushOnShutdown(File), save(File)

flush

JsonCache.Root flush(OutputStream out)
              throws JsonCache.CacheException

If the cache is dirty, saves the object graph in JSON format to the specified stream.

Parameters:

out - The output stream, which is closed before the method returns.

Returns:

The receiver, to allow chaining.

Throws:

JsonCache.CacheException - if the root node does not exist or if unable to create or write the file.

NullPointerException - if out is null.

See Also:

flushOnShutdown(OutputStream), save(OutputStream)

flushOnShutdown

JsonCache.Root flushOnShutdown(File file)

Makes a best-effort attempt to ensure that the cache gets flushed to a disk file if dirty on shutdown. The call has no additional effect if the shutdown hook has already been registered.

Parameters:

file - The output file.

Returns:

The receiver, to allow chaining.

Throws:

NullPointerException - if file is null.

See Also:

save(File)

flushOnShutdown

JsonCache.Root flushOnShutdown(OutputStream out)

Makes a best-effort attempt to ensure that the cache gets flushed to an output stream if dirty on shutdown. The call has no additional effect if the shutdown hook has already been registered.

Parameters:

out - The output stream, which is closed after writing it on shutdown.

Returns:

The receiver, to allow chaining.

Throws:

NullPointerException - if out is null.

See Also:

save(OutputStream)

getMapper

com.fasterxml.jackson.databind.ObjectMapper getMapper()

Returns the mapper used for JSON-object marshalling and serialisation operations. Callers may configure the mapper to achieve the desired JSON serialisation format.

Returns:

The mapper.

See Also:

mapper(ObjectMapper)

getMergePolicy

JsonCache.Root.MergePolicy getMergePolicy()

Returns the merge policy that applies when load() is called on a cache that is already loaded. The default is JsonCache.Root.MergePolicy.MERGE_RECURSIVE;

Returns:

The merge policy.

See Also:

mergePolicy(MergePolicy)

isDirty

boolean isDirty()

Indicates whether the cached has unsaved changes.

Returns:

true if there are unsaved changes.

load

JsonCache.Root load(File file)
             throws JsonCache.CacheException

Loads the cache from the specified file. If the cache is already loaded, merges the incoming tree according to the current merge policy. The call has no effect if the file does not exist.

Parameters:

file - The JSON file to load.

Returns:

The receiver, to allow chaining.

Throws:

JsonCache.CacheException - if the file exists but could not be read or its content is not valid JSON.

NullPointerException - if file is null.

See Also:

save(File), save(OutputStream), unload()

load

JsonCache.Root load(InputStream in)
             throws JsonCache.CacheException

Loads the cache from the specified stream. If the cache is already loaded, merges the incoming tree according to the current merge policy.

Parameters:

in - The input stream from which to load, which is closed before the method returns.

Returns:

The receiver, to allow chaining.

Throws:

JsonCache.CacheException - if the stream content is not valid JSON.

NullPointerException - if in is null.

See Also:

save(File), save(OutputStream), unload()

mapper

JsonCache.Root mapper(com.fasterxml.jackson.databind.ObjectMapper mapper)

Sets the mapper to use for JSON-object marshalling and serialisation operations.

Parameters:

mapper - The new mapper.

Returns:

The receiver, to allow chaining.

Throws:

NullPointerException - if mapper is null.

See Also:

getMapper()

mergePolicy

JsonCache.Root mergePolicy(JsonCache.Root.MergePolicy policy)

Sets the merge policy that applies when load() is called for a cache that is already loaded.

Parameters:

policy - The merge policy.

Returns:

The receiver, to allow chaining.

Throws:

NullPointerException - if policy is null.

See Also:

getMergePolicy()

save

JsonCache.Root save(File file)
             throws JsonCache.CacheException

Saves the object graph in JSON format to the specified file.

Parameters:

file - The output file.

Returns:

The receiver, to allow chaining.

Throws:

NullPointerException - if file is null.

JsonCache.CacheException - if the root node does not exist or if unable to create or write the file.

save

JsonCache.Root save(OutputStream out)
             throws JsonCache.CacheException

Saves the object graph in JSON format to the specified stream.

Parameters:

out - The output stream, which is closed before the method returns.

Returns:

The receiver, to allow chaining.

Throws:

NullPointerException - if out is null.

JsonCache.CacheException - if the root node does not exist or if unable to create or write the file.

unload

JsonCache.Root unload()

Unloads the object graph, setting the root node to null.

Returns:

The receiver, to allow chaining.

See Also:

load(File), load(InputStream)