ServerUtil (greetgo.util 0.1.0 API)

java.lang.Object
- kz.greetgo.util.ServerUtil

public class ServerUtil
extends java.lang.Object

Constructor Summary

Constructors
Constructor and Description

ServerUtil()

Constructors
Constructor and Description
`ServerUtil()`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`addToClasspath(java.io.File dir)` Adds the specified directory to the current classpath.
`static void`	`addToClasspath(java.lang.String dirName)` Adds the specified directory to the current classpath.
`static void`	`appendToSB(java.io.InputStream in, java.lang.StringBuilder sb)` Read stream encoded as UTF-8 and add to the resulting string `sb`
`static void`	`appendToSB0(java.io.InputStream in, java.lang.StringBuilder sb)` The same as `appendToSB(InputStream, StringBuilder)`, but contains `throws IOException`
`static java.lang.String`	`bytesToHex(byte[] bytes)` Converts an array of bytes into their hexadecimal representation
`static java.io.OutputStream`	`copyStreamsAndCloseIn(java.io.InputStream in, java.io.OutputStream out)` Copies one stream into another, and after copy closes input stream.
`static void`	`deleteRecursively(java.io.File file)` Deletes a file or folder with all its contents
`static void`	`deleteRecursively(java.lang.String fileFullName)` Deletes a file or folder with all its contents
`static void`	`dummyCheck(boolean tmp)` The check which does not perform anything
`static java.lang.String`	`extractName(java.lang.String className)` Extracts class name from the full name of the class
`static java.lang.String`	`extractPackage(java.lang.String className)` Extract the package name from the full name of the class
`static java.lang.String`	`firstUpper(java.lang.String str)` Raise the first letter in upper case
`static <T> T`	`fnn(T... tt)` Return the first element that is not equal to `null`
`static java.util.Set<java.io.File>`	`getAddedToClassPath()` Receives files list, which were added classpath
`static <T extends java.lang.annotation.Annotation> T`	`getAnnotation(java.lang.reflect.Method method, java.lang.Class<T> annotation)` Returns the annotation of the method checking the presence of this annotation at all inherited methods if they are
`static java.lang.String`	`getVendor()`
`static java.lang.String`	`getVersion()`
`static <T> T`	`javaDeserialize(byte[] bytes)` Performs java-serialization of the object and returns the resulting object
`static byte[]`	`javaSerialize(java.lang.Object object)` Performs java-serialization of the object and returns the data resulting after serialization
`static void`	`justOne(int value)` Check the argument for equality to one.
`static <T> T`	`notNull(T t)` Checks that the element was not null, otherwise generates NullPointerException
`static java.lang.String`	`readFile(java.io.File file)` Reads file to string as UTF-8 text
`static java.io.File`	`resolveFile(java.lang.String srcDir, java.lang.String className, java.lang.String extension)` Forms the source file (but does not create it) for a specified source-folder and with name of the class.
`static byte[]`	`streamToByteArray(java.io.InputStream in)` Reads a stream to the end to bytes array, closes a stream, and returns that was read
`static java.lang.String`	`streamToStr(java.io.InputStream in)` Reads and closes the stream, and converts the read information into a string, assuming that it represented in coding UTF-8
`static java.lang.String`	`streamToStr0(java.io.InputStream in)` The same as `streamToStr(InputStream)` but contains `throws Exception`
`static java.lang.String`	`trim(java.lang.String str)` Trims the string on both sides, i.
`static java.lang.String`	`trimLeft(java.lang.String str)` Trims the srting on the left, i.
`static java.lang.String`	`trimRight(java.lang.String str)` Trims the srting on the right, i.

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

- Constructor Detail
  - ServerUtil
```
public ServerUtil()
```
- Method Detail
  - firstUpper
```
public static java.lang.String firstUpper(java.lang.String str)
```
    Raise the first letter in upper case
    
    Parameters:
    
    str - source line
    
    Returns:
    
    string with a capital first letter
  - fnn
```
@SafeVarargs
public static <T> T fnn(T... tt)
```
    Return the first element that is not equal to null
    
    Parameters:
    
    tt - element list
    
    Returns:
    
    the first not-null-element
  - dummyCheck
```
public static void dummyCheck(boolean tmp)
```
    The check which does not perform anything
  - notNull
```
public static <T> T notNull(T t)
```
    Checks that the element was not null, otherwise generates NullPointerException
    
    Parameters:
    
    t - coverage element
    
    Returns:
    
    coverage element, that exactly is not null
  - appendToSB
```
public static void appendToSB(java.io.InputStream in,
                              java.lang.StringBuilder sb)
```
    Read stream encoded as UTF-8 and add to the resulting string sb
    
    Parameters:
    
    in - readable stream
    
    sb - dedication to add a string
  - appendToSB0
```
public static void appendToSB0(java.io.InputStream in,
                               java.lang.StringBuilder sb)
                        throws java.io.IOException
```
    The same as appendToSB(InputStream, StringBuilder), but contains throws IOException
    
    Parameters:
    
    in - readable stream
    
    sb - dedication to add a string
    
    Throws:
    
    java.io.IOException - generated in the case of I / O errors
  - streamToByteArray
```
public static byte[] streamToByteArray(java.io.InputStream in)
```
    Reads a stream to the end to bytes array, closes a stream, and returns that was read
    
    Parameters:
    
    in - readable stream
    
    Returns:
    
    the array of read bytes
  - streamToStr
```
public static java.lang.String streamToStr(java.io.InputStream in)
```
    Reads and closes the stream, and converts the read information into a string, assuming that it represented in coding UTF-8
    
    Parameters:
    
    in - readable stream
    
    Returns:
    
    resulting string
  - readFile
```
public static java.lang.String readFile(java.io.File file)
```
    Reads file to string as UTF-8 text
    
    Parameters:
    
    file - reading file
    
    Returns:
    
    read text from file
  - streamToStr0
```
public static java.lang.String streamToStr0(java.io.InputStream in)
                                     throws java.lang.Exception
```
    The same as streamToStr(InputStream) but contains throws Exception
    
    Parameters:
    
    in - readable stream
    
    Returns:
    
    resulting string
    
    Throws:
    
    java.lang.Exception - here are all the errors
  - copyStreamsAndCloseIn
```
public static java.io.OutputStream copyStreamsAndCloseIn(java.io.InputStream in,
                                                         java.io.OutputStream out)
```
    Copies one stream into another, and after copy closes input stream. Copy buffer size is equal to 4 Kb
    
    Parameters:
    
    in - readable stream, which is closed after reading
    
    out - output stream
    
    Returns:
    
    output stream
  - getVersion
```
public static java.lang.String getVersion()
```
  - getVendor
```
public static java.lang.String getVendor()
```
  - justOne
```
public static void justOne(int value)
```
    Check the argument for equality to one. If the check is failed - generates exception
    
    Parameters:
    
    value - argument checking for one
  - getAddedToClassPath
```
public static java.util.Set<java.io.File> getAddedToClassPath()
```
    Receives files list, which were added classpath
    
    Returns:
    
    files list
  - addToClasspath
```
public static void addToClasspath(java.io.File dir)
                           throws java.lang.Exception
```
    Adds the specified directory to the current classpath. After the call, it will be possible to load classes from this directory with a help of Class.forName(...)
    
    Parameters:
    
    dir - the directory which has the compiled classes, and which is not yet in current classpath
    
    Throws:
    
    java.lang.Exception
  - addToClasspath
```
public static void addToClasspath(java.lang.String dirName)
                           throws java.lang.Exception
```
    Adds the specified directory to the current classpath. After the call, it will be possible to load classes from this directory with a help of Class.forName(...)
    
    Parameters:
    
    dirName - the directory which has the compiled classes, and which is not yet in current classpath-е
    
    Throws:
    
    java.lang.Exception
  - extractPackage
```
public static java.lang.String extractPackage(java.lang.String className)
```
    Extract the package name from the full name of the class
    
    Parameters:
    
    className - full name of the class
    
    Returns:
    
    package name
  - resolveFile
```
public static java.io.File resolveFile(java.lang.String srcDir,
                                       java.lang.String className,
                                       java.lang.String extension)
```
    Forms the source file (but does not create it) for a specified source-folder and with name of the class. Also the extension can be specified. By default, the extension is .java
    
    Parameters:
    
    srcDir - the directory where the source codes are
    
    className - full name of the class
    
    extension - extension (if null, .java is used)
    
    Returns:
    
    formed file
  - extractName
```
public static java.lang.String extractName(java.lang.String className)
```
    Extracts class name from the full name of the class
    
    Parameters:
    
    className - full name of the class
    
    Returns:
    
    class name without the package
  - deleteRecursively
```
public static void deleteRecursively(java.io.File file)
```
    Deletes a file or folder with all its contents
    
    Parameters:
    
    file - deletable file or folder
  - deleteRecursively
```
public static void deleteRecursively(java.lang.String fileFullName)
```
    Deletes a file or folder with all its contents
    
    Parameters:
    
    fileFullName - path to the file or folder
  - javaSerialize
```
public static byte[] javaSerialize(java.lang.Object object)
```
    Performs java-serialization of the object and returns the data resulting after serialization
    
    Parameters:
    
    object - serializable object
    
    Returns:
    
    serializable data
  - javaDeserialize
```
public static <T> T javaDeserialize(byte[] bytes)
```
    Performs java-serialization of the object and returns the resulting object
    
    Parameters:
    
    bytes - previously serialized data
    
    Returns:
    
    object after deserialize
  - trim
```
public static java.lang.String trim(java.lang.String str)
```
    Trims the string on both sides, i. e. deletes whitespace at the beginning and end of the string and returns the result. At null there are no errors - null is returned
    
    Parameters:
    
    str - string to trim
    
    Returns:
    
    string after trimming
  - trimLeft
```
public static java.lang.String trimLeft(java.lang.String str)
```
    Trims the srting on the left, i. e. deletes whitespace at the beginning of the string. At null there are no errors - null is returned
    
    Parameters:
    
    str - string to trim
    
    Returns:
    
    string after trimming
  - trimRight
```
public static java.lang.String trimRight(java.lang.String str)
```
    Trims the srting on the right, i. e. deletes whitespace at the end of the string. At null there are no errors - null is returned
    
    Parameters:
    
    str - string to trim
    
    Returns:
    
    string after trimming
  - getAnnotation
```
public static <T extends java.lang.annotation.Annotation> T getAnnotation(java.lang.reflect.Method method,
                                                                          java.lang.Class<T> annotation)
```
    Returns the annotation of the method checking the presence of this annotation at all inherited methods if they are
    
    Parameters:
    
    method - source method
    
    annotation - class of required annotation
    
    Returns:
    
    the value of required annotation, or null if such annotation is not found
  - bytesToHex
```
public static java.lang.String bytesToHex(byte[] bytes)
```
    Converts an array of bytes into their hexadecimal representation
    
    Parameters:
    
    bytes - source array of bytes or null
    
    Returns:
    
    hexadecimal representation of the bytes in the array, or an empty string, if transmitted null instead of array of bytes

Class ServerUtil

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ServerUtil

Method Detail

firstUpper

fnn

dummyCheck

notNull

appendToSB

appendToSB0

streamToByteArray

streamToStr

readFile

streamToStr0

copyStreamsAndCloseIn

getVersion

getVendor

justOne

getAddedToClassPath

addToClasspath

addToClasspath

extractPackage

resolveFile

extractName

deleteRecursively

deleteRecursively

javaSerialize

javaDeserialize

trim

trimLeft

trimRight

getAnnotation

bytesToHex