com.github.fge.jackson
Class JsonLoader

java.lang.Object  extended by com.github.fge.jackson.JsonLoader

public final class JsonLoader
extends Object

Utility class to load JSON values from various sources as JsonNodes.

This class uses a JsonNodeReader to parse JSON inputs.

See Also:
JsonNodeReader


Method Summary
static JsonNodefromFile(File file)
          Same as fromPath(String), but this time the user supplies the File object instead
static JsonNodefromPath(String path)
          Read a JsonNode from a file on the local filesystem.
static JsonNodefromReader(Reader reader)
          Read a JsonNode from a user supplied Reader
static JsonNodefromResource(String resource)
          Read a JsonNode from a resource path.
static JsonNodefromString(String json)
          Read a JsonNode from a string input
static JsonNodefromURL(URL url)
          Read a JsonNode from an URL.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Method Detail

fromResource

public static JsonNode fromResource(@Nonnull                                    String resource)                             throws IOException
Read a JsonNode from a resource path.

This method first tries and loads the resource using Class.getResource(String); if not found, is tries and uses the context classloader and if this is not found, this class's classloader.

This method throws an IOException if the resource does not exist.

Parameters:
resource - the path to the resource (must begin with a /)
Returns:
the JSON document at the resource
Throws:
IllegalArgumentException - resource path does not begin with a /
IOException - there was a problem loading the resource, or the JSON document is invalid

fromURL

public static JsonNode fromURL(URL url)                        throws IOException
Read a JsonNode from an URL.

Parameters:
url - The URL to fetch the JSON document from
Returns:
The document at that URL
Throws:
IOException - in case of network problems etc.

fromPath

public static JsonNode fromPath(String path)                         throws IOException
Read a JsonNode from a file on the local filesystem.

Parameters:
path - the path (relative or absolute) to the file
Returns:
the document in the file
Throws:
IOException - if this is not a file, if it cannot be read, etc.

fromFile

public static JsonNode fromFile(File file)                         throws IOException
Same as fromPath(String), but this time the user supplies the File object instead

Parameters:
file - the File object
Returns:
The document
Throws:
IOException - in many cases!

fromReader

public static JsonNode fromReader(Reader reader)                           throws IOException
Read a JsonNode from a user supplied Reader

Parameters:
reader - The reader
Returns:
the document
Throws:
IOException - if the reader has problems

fromString

public static JsonNode fromString(String json)                           throws IOException
Read a JsonNode from a string input

Parameters:
json - the JSON as a string
Returns:
the document
Throws:
IOException - could not read from string




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