Package eu.europa.esig.dss.utils.guava.impl

Class GoogleGuavaUtils

java.lang.Object

eu.europa.esig.dss.utils.guava.impl.GoogleGuavaUtils

All Implemented Interfaces:

IUtils

public class GoogleGuavaUtils
extends Object
implements IUtils

Google Guava implementation of Utils

Constructor Summary

Constructors

Constructor	Description
GoogleGuavaUtils()	Default constructor

Method Summary

Modifier and Type	Method	Description
boolean	areStringsEqual(String text1, String text2)	Checks if the strings are equal Ex.
boolean	areStringsEqualIgnoreCase(String text1, String text2)	Checks if the strings are equal with case ignore Ex.
int	arraySize(byte[] array)	Gets size of the byte array.
int	arraySize(char[] array)	Gets size of the byte array.
int	arraySize(Object[] array)	Gets size of the array.
void	cleanDirectory(File directory)	Cleans the directory
void	closeQuietly(Closeable closeable)	Closes quietly
int	collectionSize(Collection collection)	Gets the size of the collection
boolean	compareInputStreams(InputStream stream1, InputStream stream2)	Compares content of two InputStreams
byte[]	concat(byte[]... byteArrays)	Concatenates byte arrays to a single byte array
<T> boolean	containsAny(Collection<T> superCollection, Collection<T> subCollection)	This method returns boolean result whether the superCollection contains any element of the subCollection Ex.
void	copy(InputStream is, OutputStream os)	Copies is to os
boolean	endsWithIgnoreCase(String text, String expected)	Checks if the string ends with case ignore Ex.
byte[]	fromBase64(String base64)	Transforms a base64-encoded string to byte array
byte[]	fromHex(String hex)	Transforms a HEX-encoded string to byte array
String	getFileNameExtension(String filename)	This method returns an extension for the given filename Ex.
long	getInputStreamSize(InputStream is)	Gets the size of the InputStream content
boolean	isArrayEmpty(byte[] array)	Checks if the byte array is null or empty
boolean	isArrayEmpty(char[] array)	Checks if the char array is null or empty
boolean	isArrayEmpty(Object[] array)	Checks if the array is null or empty
boolean	isArrayNotEmpty(byte[] array)	Checks if the byte array is not null nor empty
boolean	isArrayNotEmpty(char[] array)	Checks if the char array is not null nor empty
boolean	isArrayNotEmpty(Object[] array)	Checks if the array is not null nor empty
boolean	isBase64Encoded(String base64String)	Checks if the string is base64-encoded
boolean	isCollectionEmpty(Collection collection)	Checks if the collection is null or empty
boolean	isCollectionNotEmpty(Collection collection)	Checks if the collection is not null nor empty
boolean	isHexEncoded(String hexString)	Checks if the string is HEX (base16) encoded
boolean	isMapEmpty(Map<?,?> map)	Checks if the map is null or empty
boolean	isMapNotEmpty(Map<?,?> map)	Checks if the map is not null nor empty
boolean	isStringBlank(String text)	Checks if the string is blank Ex.
boolean	isStringDigits(String text)	Checks if the string contains only digits Ex. "123" = true; "1a2b" = false
boolean	isStringEmpty(String text)	Checks if the string is empty Ex.
boolean	isStringNotBlank(String text)	Checks if the string is not blank Ex.
boolean	isStringNotEmpty(String text)	Checks if the string is not empty Ex.
boolean	isTrue(Boolean bool)	Checks if the Boolean value is set to true NOTE: if null, returns false!
String	joinStrings(Collection<String> strings, String separator)	Joins the strings with the given separator Ex.
Collection<File>	listFiles(File folder, String[] extensions, boolean recursive)	Lists all files from the folder with the given extensions
String	lowerCase(String text)	Converts a string to its lower case representation Ex.
<T> List<T>	reverseList(List<T> list)	Creates a reversed copy of the list
boolean	startsWith(byte[] byteArray, byte[] prefixArray)	Checks if the byteArray starts with prefixArray
boolean	startsWith(InputStream inputStream, byte[] prefixArray)	Checks if the inputStream starts with prefixArray.
byte[]	subarray(byte[] array, int start, int length)	Returns a subArray, starting from position start with the defined length length
String	substringAfter(String text, String after)	Returns a substring after the specified character Ex.
String	toBase64(byte[] bytes)	Transforms the binaries to String base64-encoded representation
byte[]	toByteArray(InputStream is)	Reads the InputStream and returns the resulting byte array
String	toHex(byte[] bytes)	Transforms the binaries to String HEX representation
String	trim(String text)	Trims the string, by removing all leading and descending spaces and lines Ex. " 123 " = "123"
String	upperCase(String text)	Converts a string to its upper case representation Ex.
void	write(byte[] content, OutputStream os)	Writes content to os

Methods inherited from class java.lang.Object

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

Constructor Details

GoogleGuavaUtils

public GoogleGuavaUtils()

Default constructor

Method Details

isStringEmpty

public boolean isStringEmpty(String text)

Description copied from interface: IUtils

Checks if the string is empty Ex. "nowina" = false; "" = true NOTE: blank string (e.g. " ") is not empty!

Specified by:

isStringEmpty in interface IUtils

Parameters:

text - String

Returns:

TRUE if the string is empty, FALSE otherwise

isStringNotEmpty

public boolean isStringNotEmpty(String text)

Description copied from interface: IUtils

Checks if the string is not empty Ex. "nowina" = true; "" = false NOTE: blank string (e.g. " ") is not empty!

Specified by:

isStringNotEmpty in interface IUtils

Parameters:

text - String

Returns:

TRUE if the string is not empty, FALSE otherwise

isStringBlank

public boolean isStringBlank(String text)

Description copied from interface: IUtils

Checks if the string is blank Ex. "nowina" = false; " " = true

Specified by:

isStringBlank in interface IUtils

Parameters:

text - String

Returns:

TRUE if the string is blank, FALSE otherwise

isStringNotBlank

public boolean isStringNotBlank(String text)

Description copied from interface: IUtils

Checks if the string is not blank Ex. "nowina" = true; " " = false

Specified by:

isStringNotBlank in interface IUtils

Parameters:

text - String

Returns:

TRUE if the string is not blank, FALSE otherwise

areStringsEqual

public boolean areStringsEqual(String text1,
 String text2)

Description copied from interface: IUtils

Checks if the strings are equal Ex. "nowina" == "nowina" = true; "nowina" == "Nowina" = false

Specified by:

areStringsEqual in interface IUtils

Parameters:

text1 - String

text2 - String

Returns:

TRUE if the strings are equal, FALSE otherwise

areStringsEqualIgnoreCase

public boolean areStringsEqualIgnoreCase(String text1,
 String text2)

Description copied from interface: IUtils

Checks if the strings are equal with case ignore Ex. "nowina" == "Nowina" = true; "water" == "fire" = false

Specified by:

areStringsEqualIgnoreCase in interface IUtils

Parameters:

text1 - String

text2 - String

Returns:

TRUE if the strings are equal with case ignore, FALSE otherwise

isStringDigits

public boolean isStringDigits(String text)

Description copied from interface: IUtils

Checks if the string contains only digits Ex. "123" = true; "1a2b" = false

Specified by:

isStringDigits in interface IUtils

Parameters:

text - String

Returns:

TRUE if the string contains only digits, FALSE otherwise

trim

public String trim(String text)

Description copied from interface: IUtils

Trims the string, by removing all leading and descending spaces and lines Ex. " 123 " = "123"

Specified by:

trim in interface IUtils

Parameters:

text - String

Returns:

the trimmed string

joinStrings

public String joinStrings(Collection<String> strings,
 String separator)

Description copied from interface: IUtils

Joins the strings with the given separator Ex. "Nowina" "123", "," = "Nowina,123"

Specified by:

joinStrings in interface IUtils

Parameters:

strings - a collection of Strings

separator - String

Returns:

the joined string

concat

public byte[] concat(byte[]... byteArrays)

Description copied from interface: IUtils

Concatenates byte arrays to a single byte array

Specified by:

concat in interface IUtils

Parameters:

byteArrays - an array of byte arrays to be concatenated

Returns:

byte array

substringAfter

public String substringAfter(String text,
 String after)

Description copied from interface: IUtils

Returns a substring after the specified character Ex. "aaaaa?bbb", "?" = "bbb"

Specified by:

substringAfter in interface IUtils

Parameters:

text - String to get a substring from

after - String string to get a substring after which

Returns:

the substring

endsWithIgnoreCase

public boolean endsWithIgnoreCase(String text,
 String expected)

Description copied from interface: IUtils

Checks if the string ends with case ignore Ex. "hello", "LO" = true; "hello", "a" = false

Specified by:

endsWithIgnoreCase in interface IUtils

Parameters:

text - String to check

expected - String the end string to check

Returns:

TRUE if the string ends with case ignore, FALSE otherwise

getFileNameExtension

public String getFileNameExtension(String filename)

Description copied from interface: IUtils

This method returns an extension for the given filename Ex. "file.xml" = "xml"; "document.pdf" = "pdf"

Specified by:

getFileNameExtension in interface IUtils

Parameters:

filename - String representing a filename extracted from a file

Returns:

String extension

lowerCase

public String lowerCase(String text)

Description copied from interface: IUtils

Converts a string to its lower case representation Ex. "Nowina" = "nowina"

Specified by:

lowerCase in interface IUtils

Parameters:

text - String

Returns:

the lower case string

upperCase

public String upperCase(String text)

Description copied from interface: IUtils

Converts a string to its upper case representation Ex. "Nowina" = "NOWINA"

Specified by:

upperCase in interface IUtils

Parameters:

text - String

Returns:

the upper case string

isArrayEmpty

public boolean isArrayEmpty(Object[] array)

Description copied from interface: IUtils

Checks if the array is null or empty

Specified by:

isArrayEmpty in interface IUtils

Parameters:

array - to check

Returns:

TRUE if the array is null or empty, FALSE otherwise

isArrayNotEmpty

public boolean isArrayNotEmpty(Object[] array)

Description copied from interface: IUtils

Checks if the array is not null nor empty

Specified by:

isArrayNotEmpty in interface IUtils

Parameters:

array - to check

Returns:

TRUE if the array is not null nor empty, FALSE otherwise

arraySize

public int arraySize(Object[] array)

Description copied from interface: IUtils

Gets size of the array. If null, returns 0.

Specified by:

arraySize in interface IUtils

Parameters:

array - to check

Returns:

size of the given array

isArrayEmpty

public boolean isArrayEmpty(byte[] array)

Description copied from interface: IUtils

Checks if the byte array is null or empty

Specified by:

isArrayEmpty in interface IUtils

Parameters:

array - byte array to check

Returns:

TRUE if the byte array is null or empty, FALSE otherwise

isArrayNotEmpty

public boolean isArrayNotEmpty(byte[] array)

Description copied from interface: IUtils

Checks if the byte array is not null nor empty

Specified by:

isArrayNotEmpty in interface IUtils

Parameters:

array - byte array to check

Returns:

TRUE if the byte array is not null nor empty, FALSE otherwise

arraySize

public int arraySize(byte[] array)

Description copied from interface: IUtils

Gets size of the byte array. If null, returns 0.

Specified by:

arraySize in interface IUtils

Parameters:

array - byte array to check

Returns:

size of the given array

isArrayEmpty

public boolean isArrayEmpty(char[] array)

Description copied from interface: IUtils

Checks if the char array is null or empty

Specified by:

isArrayEmpty in interface IUtils

Parameters:

array - char array to check

Returns:

TRUE if the char array is null or empty, FALSE otherwise

isArrayNotEmpty

public boolean isArrayNotEmpty(char[] array)

Description copied from interface: IUtils

Checks if the char array is not null nor empty

Specified by:

isArrayNotEmpty in interface IUtils

Parameters:

array - char array to check

Returns:

TRUE if the char array is not null nor empty, FALSE otherwise

arraySize

public int arraySize(char[] array)

Description copied from interface: IUtils

Gets size of the byte array. If null, returns 0.

Specified by:

arraySize in interface IUtils

Parameters:

array - byte array to check

Returns:

size of the given array

subarray

public byte[] subarray(byte[] array,
 int start,
 int length)

Description copied from interface: IUtils

Returns a subArray, starting from position start with the defined length length

Specified by:

subarray in interface IUtils

Parameters:

array - byte array to get subArray from

start - the start index of the subArray

length - the final index of the subArray to be copied

Returns:

subArray

isTrue

public boolean isTrue(Boolean bool)

Description copied from interface: IUtils

Checks if the Boolean value is set to true NOTE: if null, returns false!

Specified by:

isTrue in interface IUtils

Parameters:

bool - Boolean

Returns:

TRUE if the value is set to true, FALSE otherwise

isCollectionEmpty

public boolean isCollectionEmpty(Collection collection)

Description copied from interface: IUtils

Checks if the collection is null or empty

Specified by:

isCollectionEmpty in interface IUtils

Parameters:

collection - to check

Returns:

TRUE if the collection is null or empty, FALSE otherwise

isCollectionNotEmpty

public boolean isCollectionNotEmpty(Collection collection)

Description copied from interface: IUtils

Checks if the collection is not null nor empty

Specified by:

isCollectionNotEmpty in interface IUtils

Parameters:

collection - to check

Returns:

TRUE if the collection is not null nor empty, FALSE otherwise

isMapEmpty

public boolean isMapEmpty(Map<?,?> map)

Description copied from interface: IUtils

Checks if the map is null or empty

Specified by:

isMapEmpty in interface IUtils

Parameters:

map - to check

Returns:

TRUE if the map is null or empty, FALSE otherwise

isMapNotEmpty

public boolean isMapNotEmpty(Map<?,?> map)

Description copied from interface: IUtils

Checks if the map is not null nor empty

Specified by:

isMapNotEmpty in interface IUtils

Parameters:

map - to check

Returns:

TRUE if the map is not null nor empty, FALSE otherwise

collectionSize

public int collectionSize(Collection collection)

Description copied from interface: IUtils

Gets the size of the collection

Specified by:

collectionSize in interface IUtils

Parameters:

collection - Collection

Returns:

size of the collection

isHexEncoded

public boolean isHexEncoded(String hexString)

Description copied from interface: IUtils

Checks if the string is HEX (base16) encoded

Specified by:

isHexEncoded in interface IUtils

Parameters:

hexString - String

Returns:

TRUE if he string is HEX encoded, FALSE otherwise

toHex

public String toHex(byte[] bytes)

Description copied from interface: IUtils

Transforms the binaries to String HEX representation

Specified by:

toHex in interface IUtils

Parameters:

bytes - byte array

Returns:

String HEX-encoded

fromHex

public byte[] fromHex(String hex)

Description copied from interface: IUtils

Transforms a HEX-encoded string to byte array

Specified by:

fromHex in interface IUtils

Parameters:

hex - String hex-encoded

Returns:

byte array

isBase64Encoded

public boolean isBase64Encoded(String base64String)

Description copied from interface: IUtils

Checks if the string is base64-encoded

Specified by:

isBase64Encoded in interface IUtils

Parameters:

base64String - String

Returns:

TRUE if the String is base64-encoded, FALSE otherwise

toBase64

public String toBase64(byte[] bytes)

Description copied from interface: IUtils

Transforms the binaries to String base64-encoded representation

Specified by:

toBase64 in interface IUtils

Parameters:

bytes - byte array

Returns:

String base64-encoded

fromBase64

public byte[] fromBase64(String base64)

Description copied from interface: IUtils

Transforms a base64-encoded string to byte array

Specified by:

fromBase64 in interface IUtils

Parameters:

base64 - String base64-encoded

Returns:

byte array

toByteArray

public byte[] toByteArray(InputStream is)
                   throws IOException

Description copied from interface: IUtils

Reads the InputStream and returns the resulting byte array

Specified by:

toByteArray in interface IUtils

Parameters:

is - InputStream

Returns:

byte array

Throws:

IOException - if an exception occurs

closeQuietly

public void closeQuietly(Closeable closeable)

Description copied from interface: IUtils

Closes quietly

Specified by:

closeQuietly in interface IUtils

Parameters:

closeable - Closeable

copy

public void copy(InputStream is,
 OutputStream os)
          throws IOException

Description copied from interface: IUtils

Copies is to os

Specified by:

copy in interface IUtils

Parameters:

is - InputStream to copy

os - OutputStream to write the value into

Throws:

IOException - if an exception occurs

write

public void write(byte[] content,
 OutputStream os)
           throws IOException

Description copied from interface: IUtils

Writes content to os

Specified by:

write in interface IUtils

Parameters:

content - byte array to write

os - OutputStream to write the value into

Throws:

IOException - if an exception occurs

getInputStreamSize

public long getInputStreamSize(InputStream is)
                        throws IOException

Description copied from interface: IUtils

Gets the size of the InputStream content

Specified by:

getInputStreamSize in interface IUtils

Parameters:

is - InputStream

Returns:

size

Throws:

IOException - if an exception occurs

compareInputStreams

public boolean compareInputStreams(InputStream stream1,
 InputStream stream2)
                            throws IOException

Description copied from interface: IUtils

Compares content of two InputStreams

Specified by:

compareInputStreams in interface IUtils

Parameters:

stream1 - InputStream

stream2 - InputStream

Returns:

TRUE if the content of two InputStream is equal, FALSE otherwise

Throws:

IOException - if an exception on InputStream read occurs

startsWith

public boolean startsWith(byte[] byteArray,
 byte[] prefixArray)

Description copied from interface: IUtils

Checks if the byteArray starts with prefixArray

Specified by:

startsWith in interface IUtils

Parameters:

byteArray - byte array to verify

prefixArray - byte array used on verification

Returns:

TRUE if the byte array starts with a prefix array, FALSE otherwise

startsWith

public boolean startsWith(InputStream inputStream,
 byte[] prefixArray)

Description copied from interface: IUtils

Checks if the inputStream starts with prefixArray.

Specified by:

startsWith in interface IUtils

Parameters:

inputStream - byte array to verify

prefixArray - byte array used on verification

Returns:

TRUE if the InputStream starts with a prefix array, FALSE otherwise

cleanDirectory

public void cleanDirectory(File directory)
                    throws IOException

Description copied from interface: IUtils

Cleans the directory

Specified by:

cleanDirectory in interface IUtils

Parameters:

directory - File

Throws:

IOException - if an exception occurs

listFiles

public Collection<File> listFiles(File folder,
 String[] extensions,
 boolean recursive)

Description copied from interface: IUtils

Lists all files from the folder with the given extensions

Specified by:

listFiles in interface IUtils

Parameters:

folder - File the directory to get files from

extensions - Strings to get files with

recursive - defines if the files has to be obtained recursively (from children directories)

Returns:

a collection of Files

reverseList

public <T> List<T> reverseList(List<T> list)

Description copied from interface: IUtils

Creates a reversed copy of the list

Specified by:

reverseList in interface IUtils

Type Parameters:

T - the class of list elements

Parameters:

list - List to get a reversed copy of

Returns:

reversed list

containsAny

public <T> boolean containsAny(Collection<T> superCollection,
 Collection<T> subCollection)

Description copied from interface: IUtils

This method returns boolean result whether the superCollection contains any element of the subCollection Ex. {'A', 'B', 'C'}, {'B', 'C', 'D'} = TRUE

Specified by:

containsAny in interface IUtils

Type Parameters:

T - object

Parameters:

superCollection - first collection

subCollection - second collection

Returns:

TRUE if both collection intersect each other, FALSE otherwise