CommonMethods (sdc 1.1.0 API)

java.lang.Object
- org.openecomp.core.utilities.CommonMethods

```
public class CommonMethods
extends Object
```
This class provides auxiliary static methods.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static String`	`arrayToCommaSeparatedString(String[] arr)` Converts array of strings to comma-separated string.
`static String`	`arrayToSeparatedString(String[] arr, char separator)` Converts array of strings to string separated with specified character.
`static String`	`bytesToHex(byte[] bytes)` Bytes to hex string.
`static <B,D> D`	`cast(B b1, Class<D> cls)` Casts an object to the class or interface represented by the specified `Class` object.
`static String`	`collectionToCommaSeparatedString(Collection<String> elementCollection)` Collection to comma separated string string.
`static <T> T[]`	`concat(T[] left, T[] right)` Concatenates two Java arrays.
`static byte[]`	`decode(byte[] ascii)` Decodes ASCII byte stream into binary format.
`static Serializable`	`deserializeObject(byte[] bytes)` Deserializes an object instance.
`static String`	`duplicateStringWithDelimiter(String arg, char separator, int numberOfDuplications)` Duplicate string with delimiter string.
`static byte[]`	`encode(byte[] binary)` Encodes binary byte stream to ASCII format.
`static String`	`getResourcesPath(String resourceName)` Gets resources path.
`static String`	`getStackTrace(Throwable throwable)` Gets stack trace.
`static boolean`	`isEmpty(byte[] byteArray)` Checks whether the given `Object` is empty.
`static boolean`	`isEmpty(Collection<?> collection)` Checks whether the given collection is empty.
`static boolean`	`isEmpty(Map<?,?> map)` Checks whether the given map is empty.
`static boolean`	`isEmpty(Object obj)` Checks whether the given `Object` is empty.
`static boolean`	`isEmpty(Object[] array)` Checks whether the given Java array is empty.
`static boolean`	`isEmpty(String str)` Checks whether the given `String` is empty.
`static boolean`	`isEqualObject(Object obj1, Object obj2)` Is equal object boolean.
`static String`	`listToSeparatedString(List<String> list, char separator)` Converts array of strings to string separated with specified character.
`static <T,S> void`	`mergeEntryInList(T key, S value, List<Map<T,S>> target)` Merge entry in list.
`static <T> List<T>`	`mergeLists(List<T> target, List<T> source)` Merge lists list.
`static <T,S> List<Map<T,S>>`	`mergeListsOfMap(List<Map<T,S>> target, List<Map<T,S>> source)` Merge lists of map list.
`static <T,S> Map<T,S>`	`mergeMaps(Map<T,S> target, Map<T,S> source)` Merge maps map.
`static <T> T`	`newInstance(Class<T> cls)` New instance t.
`static Object`	`newInstance(String classname)` New instance object.
`static <T> T`	`newInstance(String classname, Class<T> cls)` New instance t.
`static String`	`nextUuId()` Gets an universally unique identifier (UUID).
`static String`	`printStackTrace()` Print stack trace string.
`static byte[]`	`serializeObject(Serializable object)` Serializes an object instance into byte array.
`static <T> T[]`	`toArray(Collection<? extends T> col, Class<T> type)` Converts a collection to Java array.
`static long[]`	`toPrimitive(Long[] array)` Converts the array with Long elements to the array with long (primitive type).
`static <T> Set<T>`	`toSingleElementSet(T element)` To single element set set.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - serializeObject
```
public static byte[] serializeObject(Serializable object)
```
    Serializes an object instance into byte array.
    
    Parameters:
    
    object - An instance to be serialized.
    
    Returns:
    
    Java array of bytes.
    
    See Also:
    
    #deserializeObject(byte[])
  - deserializeObject
```
public static Serializable deserializeObject(byte[] bytes)
```
    Deserializes an object instance.
    
    Parameters:
    
    bytes - Java array of bytes.
    
    Returns:
    
    Deserialized instance of an object.
    
    See Also:
    
    #serializeObject(Serializable)
  - encode
```
public static byte[] encode(byte[] binary)
```
    Encodes binary byte stream to ASCII format.
    
    Parameters:
    
    binary - An Java array of bytes in binary format.
    
    Returns:
    
    An Java array of bytes encoded in ASCII format.
    
    See Also:
    
    #decode(byte[])
  - decode
```
public static byte[] decode(byte[] ascii)
```
    Decodes ASCII byte stream into binary format.
    
    Parameters:
    
    ascii - An Java array of bytes in ASCII format.
    
    Returns:
    
    An Java array of bytes encoded in binary format.
    
    See Also:
    
    #encode(byte[])
  - isEmpty
```
public static boolean isEmpty(Object obj)
```
    Checks whether the given Object is empty.
    
    Parameters:
    
    obj - Object to be checked.
    
    Returns:
    
    true - if the Object is null, false otherwise.
  - isEmpty
```
public static boolean isEmpty(byte[] byteArray)
```
    Checks whether the given Object is empty.
    
    Parameters:
    
    byteArray - Object to be checked.
    
    Returns:
    
    true - if the Object is null, false otherwise.
  - isEmpty
```
public static boolean isEmpty(String str)
```
    Checks whether the given String is empty.
    
    Parameters:
    
    str - String object to be checked.
    
    Returns:
    
    true - if the String is null or empty, false - otherwise.
  - isEmpty
```
public static boolean isEmpty(Object[] array)
```
    Checks whether the given Java array is empty.
    
    Parameters:
    
    array - Java array to be checked.
    
    Returns:
    
    true - if the array is null or empty, false - otherwise.
  - isEmpty
```
public static boolean isEmpty(Collection<?> collection)
```
    Checks whether the given collection is empty.
    
    Parameters:
    
    collection - A collection to be checked.
    
    Returns:
    
    true - if the collection is null or empty, false - otherwise.
  - isEmpty
```
public static boolean isEmpty(Map<?,?> map)
```
    Checks whether the given map is empty.
    
    Parameters:
    
    map - A map to be checked.
    
    Returns:
    
    true - if the map is null or empty, false - otherwise.
  - toPrimitive
```
public static long[] toPrimitive(Long[] array)
```
    Converts the array with Long elements to the array with long (primitive type).
    
    Parameters:
    
    array - input array with Long elements
    
    Returns:
    
    array with the same elements converted to the long type (primitive)
  - toArray
```
public static <T> T[] toArray(Collection<? extends T> col,
                              Class<T> type)
```
    Converts a collection to Java array.
    
    Type Parameters:
    
    T - Java type of the collection element.
    
    Parameters:
    
    col - Collection to be converted to array
    
    type - Java type of collection/array element
    
    Returns:
    
    An Java array of collection elements, or empty array if collection is null or empty.
  - nextUuId
```
public static String nextUuId()
```
    Gets an universally unique identifier (UUID).
    
    Returns:
    
    String representation of generated UUID.
  - concat
```
public static <T> T[] concat(T[] left,
                             T[] right)
```
    Concatenates two Java arrays. The method allocates a new array and copies all elements to it or returns one of input arrays if another one is empty.
    
    Type Parameters:
    
    T - the type parameter
    
    Parameters:
    
    left - Elements of this array will be copied to positions from 0 to left.length - 1 in the target array.
    
    right - Elements of this array will be copied to positions from left.length to left.length + right.length
    
    Returns:
    
    A newly allocate Java array that accommodates elements of source (left/right) arrays orone of source arrays if another is empty, null - otherwise.
  - cast
```
public static <B,D> D cast(B b1,
                           Class<D> cls)
```
    Casts an object to the class or interface represented by the specified Class object. The method logic is similar to Java method Class.cast(Object) with the only difference that unlike Java's version the type name of the current object instance is specified in the error message if casting fails to simplify error tracking.
    
    Type Parameters:
    
    B - the type parameter
    
    D - the type parameter
    
    Parameters:
    
    b1 - An object instance to be casted to the specified Java type.
    
    cls - Target Java type.
    
    Returns:
    
    Object instance safely casted to the requested Java type.
    
    Throws:
    
    ClassCastException - In case which is the given object is not instance of the specified Java type.
  - newInstance
```
public static Object newInstance(String classname)
```
    New instance object.
    
    Parameters:
    
    classname - the classname
    
    Returns:
    
    the object
  - newInstance
```
public static <T> T newInstance(String classname,
                                Class<T> cls)
```
    New instance t.
    
    Type Parameters:
    
    T - the type parameter
    
    Parameters:
    
    classname - the classname
    
    cls - the cls
    
    Returns:
    
    the t
  - newInstance
```
public static <T> T newInstance(Class<T> cls)
```
    New instance t.
    
    Type Parameters:
    
    T - the type parameter
    
    Parameters:
    
    cls - the cls
    
    Returns:
    
    the t
  - getResourcesPath
```
public static String getResourcesPath(String resourceName)
```
    Gets resources path.
    
    Parameters:
    
    resourceName - the resource name
    
    Returns:
    
    the resources path
  - getStackTrace
```
public static String getStackTrace(Throwable throwable)
```
    Gets stack trace.
    
    Parameters:
    
    throwable - the throwable
    
    Returns:
    
    the stack trace
  - printStackTrace
```
public static String printStackTrace()
```
    Print stack trace string.
    
    Returns:
    
    the string
  - isEqualObject
```
public static boolean isEqualObject(Object obj1,
                                    Object obj2)
```
    Is equal object boolean.
    
    Parameters:
    
    obj1 - the obj 1
    
    obj2 - the obj 2
    
    Returns:
    
    the boolean
  - arrayToCommaSeparatedString
```
public static String arrayToCommaSeparatedString(String[] arr)
```
    Converts array of strings to comma-separated string.
    
    Parameters:
    
    arr - array of strings
    
    Returns:
    
    the string
  - collectionToCommaSeparatedString
```
public static String collectionToCommaSeparatedString(Collection<String> elementCollection)
```
    Collection to comma separated string string.
    
    Parameters:
    
    elementCollection - the element collection
    
    Returns:
    
    the string
  - arrayToSeparatedString
```
public static String arrayToSeparatedString(String[] arr,
                                            char separator)
```
    Converts array of strings to string separated with specified character.
    
    Parameters:
    
    arr - array of strings
    
    separator - the separator
    
    Returns:
    
    the string
  - listToSeparatedString
```
public static String listToSeparatedString(List<String> list,
                                           char separator)
```
    Converts array of strings to string separated with specified character.
    
    Parameters:
    
    list - array of strings
    
    separator - the separator
    
    Returns:
    
    the string
  - duplicateStringWithDelimiter
```
public static String duplicateStringWithDelimiter(String arg,
                                                  char separator,
                                                  int numberOfDuplications)
```
    Duplicate string with delimiter string.
    
    Parameters:
    
    arg - the arg
    
    separator - the separator
    
    numberOfDuplications - the number of duplications
    
    Returns:
    
    the string
  - bytesToHex
```
public static String bytesToHex(byte[] bytes)
```
    Bytes to hex string.
    
    Parameters:
    
    bytes - the bytes
    
    Returns:
    
    the string
  - toSingleElementSet
```
public static <T> Set<T> toSingleElementSet(T element)
```
    To single element set set.
    
    Type Parameters:
    
    T - the class of the objects in the set
    
    Parameters:
    
    element - the single element to be contained in the returned Set
    
    Returns:
    
    an immutable set containing only the specified object. The returned set is serializable.
  - mergeListsOfMap
```
public static <T,S> List<Map<T,S>> mergeListsOfMap(List<Map<T,S>> target,
                                                   List<Map<T,S>> source)
```
    Merge lists of map list.
    
    Type Parameters:
    
    T - the type parameter
    
    S - the type parameter
    
    Parameters:
    
    target - the target
    
    source - the source
    
    Returns:
    
    the list
  - mergeLists
```
public static <T> List<T> mergeLists(List<T> target,
                                     List<T> source)
```
    Merge lists list.
    
    Type Parameters:
    
    T - the type parameter
    
    Parameters:
    
    target - the target
    
    source - the source
    
    Returns:
    
    the list
  - mergeEntryInList
```
public static <T,S> void mergeEntryInList(T key,
                                          S value,
                                          List<Map<T,S>> target)
```
    Merge entry in list.
    
    Type Parameters:
    
    T - the type parameter
    
    S - the type parameter
    
    Parameters:
    
    key - the key
    
    value - the value
    
    target - the target
  - mergeMaps
```
public static <T,S> Map<T,S> mergeMaps(Map<T,S> target,
                                       Map<T,S> source)
```
    Merge maps map.
    
    Type Parameters:
    
    T - the type parameter
    
    S - the type parameter
    
    Parameters:
    
    target - the target
    
    source - the source
    
    Returns:
    
    the map

Class CommonMethods

Method Summary

Methods inherited from class java.lang.Object

Method Detail

serializeObject

deserializeObject

encode

decode

isEmpty

isEmpty

isEmpty

isEmpty

isEmpty

isEmpty

toPrimitive

toArray

nextUuId

concat

cast

newInstance

newInstance

newInstance

getResourcesPath

getStackTrace

printStackTrace

isEqualObject

arrayToCommaSeparatedString

collectionToCommaSeparatedString

arrayToSeparatedString

listToSeparatedString

duplicateStringWithDelimiter

bytesToHex

toSingleElementSet

mergeListsOfMap

mergeLists

mergeEntryInList

mergeMaps