iaik.xml.crypto.utils

Class Utils

java.lang.Object

iaik.xml.crypto.utils.Utils

public abstract class Utils
extends Object

This class provides some utility methods.

Constructor Summary

Constructors

Constructor and Description
Utils()

Method Summary

Modifier and Type	Method and Description
static List	copyList(List src, Class type) Returns a copy of the given src list and checks if the elements of the list are an instance of the given type.
static List	copyList(List src, Class[] types) Returns a copy of the given src list and checks if the elements of the list are an instance of one of the given types .
static List	copyList(List list, Class[] types, String name, boolean maybeNull, boolean maybeEmpty) Returns a copy of the given src list and checks if the elements of the list are an instance of one of the given types .
static List	copyList(List list, Class type, String name, boolean maybeNull, boolean maybeEmpty) Returns a copy of the given src list and checks if the elements of the list are an instance of the given type.
static Object	exceptionChainingJDK13(Object superMessage, Throwable cause)
static String	randomId(int length) Creates a random id value string containing the characters from 'A-Z' and the digits from '0-9' of the given length.

Methods inherited from class java.lang.Object

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

Constructor Detail

Utils

public Utils()

Method Detail

copyList

public static List copyList(List src,
                            Class type)
                     throws ClassCastException

Returns a copy of the given src list and checks if the elements of the list are an instance of the given type.

Parameters:

src - the source list (may be null)

type - the type the copied element must be an instance of

Returns:

a copy of the given src list (may be empty but never null)

Throws:

ClassCastException - if an element of the list is not an instance of type

copyList

public static List copyList(List src,
                            Class[] types)
                     throws ClassCastException

Returns a copy of the given src list and checks if the elements of the list are an instance of one of the given types .

Parameters:

src - the source list (may be null)

types - the type the copied element must be an instance of

Returns:

a copy of the given src list (may be empty but never null)

Throws:

ClassCastException - if an element of the list is not an instance of on of the given types

copyList

public static List copyList(List list,
                            Class type,
                            String name,
                            boolean maybeNull,
                            boolean maybeEmpty)

Returns a copy of the given src list and checks if the elements of the list are an instance of the given type.

If src is null and maybeNull is false an NullPointerException is thrown.

If src is empty and maybeEmpty is false an IllegalArgumentException is thrown.

If one of the list's elements is not of type type a ClassCastException is thrown.

Parameters:

list - the source list

type - the list's elements type

name - the name of the list (used in exception messages)

maybeNull - may the src list be null?

maybeEmpty - may the src list be empty?

Returns:

a copy of the given list

Throws:

NullPointerException - if list is null and maybeNull is false

IllegalArgumentException - if list is empty and maybeEmpty is false

ClassCastException - if list contains any elements that are not an instance of the given type

copyList

public static List copyList(List list,
                            Class[] types,
                            String name,
                            boolean maybeNull,
                            boolean maybeEmpty)
                     throws ClassCastException

Returns a copy of the given src list and checks if the elements of the list are an instance of one of the given types .

If src is null and maybeNull is false an NullPointerException is thrown.

If src is empty and maybeEmpty is false an IllegalArgumentException is thrown.

If one of the list's elements is not of one of the given types a ClassCastException is thrown.

Parameters:

list - the source list

types - the list's elements types

name - the name of the list (used in exception messages)

maybeNull - may the src list be null?

maybeEmpty - may the src list be empty?

Returns:

a copy of the given list

Throws:

NullPointerException - if list is null and maybeNull is false

IllegalArgumentException - if list is empty and maybeEmpty is false

ClassCastException - if list contains any elements that are not an instance of one of the given types

randomId

public static String randomId(int length)

Creates a random id value string containing the characters from 'A-Z' and the digits from '0-9' of the given length.

Parameters:

length - the length of the id value string

Returns:

a random id value string of the given length

exceptionChainingJDK13

public static Object exceptionChainingJDK13(Object superMessage,
                                            Throwable cause)