org.stellar.sdk

Class Util

java.lang.Object

org.stellar.sdk.Util

public class Util
extends java.lang.Object

Utility class for common operations.

note: For some reason we need to make it public, but I don't recommend to use it directly.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Util.XdrDecodeFunction<T,R> The function that converts XDR string to XDR object.

Constructor Summary

Constructors

Constructor and Description
Util()

Method Summary

Modifier and Type	Method and Description
static AssetTypeCreditAlphaNum	assertNonNativeAsset(Asset asset) Throws IllegalArgumentException if the given asset is native (XLM).
static java.lang.String	bytesToHex(byte[] bytes) Returns hex representation of bytes array.
static byte[]	getBytes(java.math.BigInteger value) Returns an 8 byte array representation of a BigInteger value.
static java.lang.String	getSdkVersion() Get the version of the SDK
static byte[]	hash(byte[] data) Returns SHA-256 hash of data.
static byte[]	hexToBytes(java.lang.String s) Returns byte array representation of hex string.
static byte[]	paddedByteArray(java.lang.String string, int length) Pads string to length with zeros.
static <T> T	parseXdr(java.lang.String xdr, Util.XdrDecodeFunction<java.lang.String,T> fromXdrBase64) Parses XDR string to XDR object.

Methods inherited from class java.lang.Object

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

Constructor Detail

Util

public Util()

Method Detail

bytesToHex

public static java.lang.String bytesToHex(byte[] bytes)

Returns hex representation of bytes array.

Parameters:

bytes - byte array to convert to hex

Returns:

hex representation of the byte array

hexToBytes

public static byte[] hexToBytes(java.lang.String s)

Returns byte array representation of hex string.

Parameters:

s - hex string to convert to byte array

Returns:

byte array representation of the hex string

hash

public static byte[] hash(byte[] data)

Returns SHA-256 hash of data.

Parameters:

data - byte array to hash

Returns:

SHA-256 hash of the data

paddedByteArray

public static byte[] paddedByteArray(java.lang.String string,
                                     int length)

Pads string to length with zeros.

Parameters:

string - string to pad

length - length of the resulting array

Returns:

padded byte array

getSdkVersion

public static java.lang.String getSdkVersion()

Get the version of the SDK

Returns:

version

assertNonNativeAsset

public static AssetTypeCreditAlphaNum assertNonNativeAsset(Asset asset)

Throws IllegalArgumentException if the given asset is native (XLM).

Parameters:

asset - The asset to check

getBytes

public static byte[] getBytes(java.math.BigInteger value)

Returns an 8 byte array representation of a BigInteger value.

Parameters:

value - BigInteger value to convert to byte array

Returns:

byte array

parseXdr

public static <T> T parseXdr(java.lang.String xdr,
                             Util.XdrDecodeFunction<java.lang.String,T> fromXdrBase64)

Parses XDR string to XDR object.

Type Parameters:

T - type of XDR object

Parameters:

xdr - XDR string

fromXdrBase64 - function that converts XDR string to XDR object

Returns:

XDR object, or null if the input string is null or empty