com.bigstep.datalake

Class JsonUtil

java.lang.Object

com.bigstep.datalake.JsonUtil

public class JsonUtil
extends Object

JSON Utilities

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.commons.logging.Log	LOG

Constructor Summary

Constructors

Constructor and Description
JsonUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static byte[]	getXAttr(Map<?,?> json, String name)
static org.apache.hadoop.fs.permission.AclStatus	toAclStatus(Map<?,?> json) Convert a Json map to a AclStatus object.
static org.apache.hadoop.fs.ContentSummary	toContentSummary(Map<?,?> json) Convert a Json map to a ContentSummary.
static org.apache.hadoop.security.token.Token<org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier>	toDelegationToken(Map<?,?> json) Convert a Json map to a Token of DelegationTokenIdentifier.
static org.apache.hadoop.hdfs.protocol.HdfsFileStatus	toFileStatus(Map<?,?> json, boolean includesType) Convert a Json map to a HdfsFileStatus object.
static String	toJsonString(org.apache.hadoop.fs.permission.AclStatus status) Convert a AclStatus object to a Json string.
static String	toJsonString(org.apache.hadoop.fs.ContentSummary contentsummary) Convert a ContentSummary to a Json string.
static String	toJsonString(Exception e) Convert an exception object to a Json string.
static String	toJsonString(org.apache.hadoop.hdfs.protocol.HdfsFileStatus status, boolean includeType) Convert a HdfsFileStatus object to a Json string.
static String	toJsonString(List<org.apache.hadoop.fs.XAttr> xAttrs)
static String	toJsonString(List<org.apache.hadoop.fs.XAttr> xAttrs, org.apache.hadoop.fs.XAttrCodec encoding)
static String	toJsonString(org.apache.hadoop.hdfs.protocol.LocatedBlocks locatedblocks) Convert LocatedBlocks to a Json string.
static String	toJsonString(org.apache.hadoop.fs.MD5MD5CRC32FileChecksum checksum) Convert a MD5MD5CRC32FileChecksum to a Json string.
static String	toJsonString(String key, Object value) Convert a key-value pair to a Json string.
static String	toJsonString(org.apache.hadoop.security.token.Token<? extends org.apache.hadoop.security.token.TokenIdentifier> token) Convert a token object to a Json string.
static org.apache.hadoop.hdfs.protocol.LocatedBlocks	toLocatedBlocks(Map<?,?> json) Convert a Json map to LocatedBlock.
static org.apache.hadoop.fs.MD5MD5CRC32FileChecksum	toMD5MD5CRC32FileChecksum(Map<?,?> json) Convert a Json map to a MD5MD5CRC32FileChecksum.
static org.apache.hadoop.ipc.RemoteException	toRemoteException(Map<?,?> json) Convert an exception object to a Json string.
static org.apache.hadoop.security.token.Token<? extends org.apache.hadoop.security.token.TokenIdentifier>	toToken(Map<?,?> m) Convert a Json map to a Token.
static List<String>	toXAttrNames(Map<?,?> json)
static Map<String,byte[]>	toXAttrs(Map<?,?> json)

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.apache.commons.logging.Log LOG

Constructor Detail

JsonUtil

public JsonUtil()

Method Detail

toJsonString

public static String toJsonString(org.apache.hadoop.security.token.Token<? extends org.apache.hadoop.security.token.TokenIdentifier> token)
                           throws IOException

Convert a token object to a Json string.

Parameters:

token - token

Returns:

returns the string representing the specified token.

Throws:

IOException - exception thrown if the map cannot be converted

toToken

public static org.apache.hadoop.security.token.Token<? extends org.apache.hadoop.security.token.TokenIdentifier> toToken(Map<?,?> m)
                                                                                                                  throws IOException

Convert a Json map to a Token.

Parameters:

m - json map of the input

Returns:

the token

Throws:

IOException

toDelegationToken

public static org.apache.hadoop.security.token.Token<org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier> toDelegationToken(Map<?,?> json)
                                                                                                                                            throws IOException

Convert a Json map to a Token of DelegationTokenIdentifier.

Parameters:

json - input map

Returns:

returns the token

Throws:

IOException

toJsonString

public static String toJsonString(Exception e)

Convert an exception object to a Json string.

Parameters:

e - the exception

Returns:

the json string

toRemoteException

public static org.apache.hadoop.ipc.RemoteException toRemoteException(Map<?,?> json)

Convert an exception object to a Json string.

Parameters:

json - the exception coded as json

Returns:

the remote exception

toJsonString

public static String toJsonString(String key,
                  Object value)

Convert a key-value pair to a Json string.

Parameters:

key - the key

value - the value

Returns:

the json string of the kv

toJsonString

public static String toJsonString(org.apache.hadoop.hdfs.protocol.HdfsFileStatus status,
                  boolean includeType)

Convert a HdfsFileStatus object to a Json string.

Parameters:

status - input status

includeType - type to use

Returns:

the json

toFileStatus

public static org.apache.hadoop.hdfs.protocol.HdfsFileStatus toFileStatus(Map<?,?> json,
                                                          boolean includesType)

Convert a Json map to a HdfsFileStatus object.

Parameters:

json -

includesType -

Returns:

sau nu

toJsonString

public static String toJsonString(org.apache.hadoop.hdfs.protocol.LocatedBlocks locatedblocks)
                           throws IOException

Convert LocatedBlocks to a Json string.

Throws:

IOException

toLocatedBlocks

public static org.apache.hadoop.hdfs.protocol.LocatedBlocks toLocatedBlocks(Map<?,?> json)
                                                                     throws IOException

Convert a Json map to LocatedBlock.

Throws:

IOException

toJsonString

public static String toJsonString(org.apache.hadoop.fs.ContentSummary contentsummary)

Convert a ContentSummary to a Json string.

toContentSummary

public static org.apache.hadoop.fs.ContentSummary toContentSummary(Map<?,?> json)

Convert a Json map to a ContentSummary.

toJsonString

public static String toJsonString(org.apache.hadoop.fs.MD5MD5CRC32FileChecksum checksum)

Convert a MD5MD5CRC32FileChecksum to a Json string.

toMD5MD5CRC32FileChecksum

public static org.apache.hadoop.fs.MD5MD5CRC32FileChecksum toMD5MD5CRC32FileChecksum(Map<?,?> json)
                                                                              throws IOException

Convert a Json map to a MD5MD5CRC32FileChecksum.

Throws:

IOException

toJsonString

public static String toJsonString(org.apache.hadoop.fs.permission.AclStatus status)

Convert a AclStatus object to a Json string.

toAclStatus

public static org.apache.hadoop.fs.permission.AclStatus toAclStatus(Map<?,?> json)

Convert a Json map to a AclStatus object.

toJsonString

public static String toJsonString(List<org.apache.hadoop.fs.XAttr> xAttrs,
                  org.apache.hadoop.fs.XAttrCodec encoding)
                           throws IOException

Throws:

IOException

toJsonString

public static String toJsonString(List<org.apache.hadoop.fs.XAttr> xAttrs)
                           throws IOException

Throws:

IOException

getXAttr

public static byte[] getXAttr(Map<?,?> json,
              String name)
                       throws IOException

Throws:

IOException

toXAttrs

public static Map<String,byte[]> toXAttrs(Map<?,?> json)
                                   throws IOException

Throws:

IOException

toXAttrNames

public static List<String> toXAttrNames(Map<?,?> json)
                                 throws IOException

Throws:

IOException