Preconditions (Hazelcast Root 3.9.2 API)

java.lang.Object
- com.hazelcast.util.Preconditions

```
public final class Preconditions
extends Object
```
A utility class for validating arguments and state.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static int`	`checkAsyncBackupCount(int currentBackupCount, int newAsyncBackupCount)` Tests if the newAsyncBackupCount count is valid.
`static int`	`checkBackupCount(int newBackupCount, int currentAsyncBackupCount)` Tests if the newBackupCount count is valid.
`static void`	`checkFalse(boolean expression, String errorMessage)` Tests whether the supplied expression is `false`.
`static <T> Iterator<T>`	`checkHasNext(Iterator<T> iterator, String message)` Check if iterator has next element.
`static String`	`checkHasText(String argument, String errorMessage)` Tests if a string contains text.
`static <E> E`	`checkInstanceOf(Class<E> type, Object object)`
`static <E> E`	`checkInstanceOf(Class<E> type, Object object, String errorMessage)` Tests whether the supplied object is an instance of the supplied class type.
`static long`	`checkNegative(long value, String errorMessage)` Tests if a long value is not negative.
`static <T> Iterable<T>`	`checkNoNullInside(Iterable<T> argument, String errorMessage)` Tests if the elements inside the argument collection are not null.
`static <E> E`	`checkNotInstanceOf(Class type, E object, String errorMessage)` Tests the supplied object to see if it is not a type of the supplied class.
`static int`	`checkNotNegative(int value, String errorMessage)` Tests if a value is not negative.
`static long`	`checkNotNegative(long value, String errorMessage)` Tests if a value is not negative.
`static <T> T`	`checkNotNull(T argument)` Tests if an argument is not null.
`static <T> T`	`checkNotNull(T argument, String errorMessage)` Tests if an argument is not null.
`static double`	`checkPositive(double value, String errorMessage)` Tests if a value is positive; so larger than 0.
`static int`	`checkPositive(int value, String errorMessage)` Tests if a value is positive; larger than 0.
`static long`	`checkPositive(long value, String errorMessage)` Tests if a value is positive; so larger than 0.
`static void`	`checkState(boolean condition, String message)` Check the state of a condition
`static void`	`checkTrue(boolean expression, String errorMessage)` Tests whether the supplied expression is `true`.
`static <E> E`	`isNotNull(E argument, String argName)` Tests if a string is not null.

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

- Method Detail
  - checkHasText
```
public static String checkHasText(String argument,
                                  String errorMessage)
```
    Tests if a string contains text.
    
    Parameters:
    
    argument - the string tested to see if it contains text.
    
    errorMessage - the errorMessage
    
    Returns:
    
    the string argument that was tested.
    
    Throws:
    
    IllegalArgumentException - if the string is empty
  - checkNotNull
```
public static <T> T checkNotNull(T argument,
                                 String errorMessage)
```
    Tests if an argument is not null.
    
    Parameters:
    
    argument - the argument tested to see if it is not null.
    
    errorMessage - the errorMessage
    
    Returns:
    
    the argument that was tested.
    
    Throws:
    
    NullPointerException - if argument is null
  - checkNoNullInside
```
public static <T> Iterable<T> checkNoNullInside(Iterable<T> argument,
                                                String errorMessage)
```
    Tests if the elements inside the argument collection are not null. If collection is null or empty the test is ignored.
    
    Parameters:
    
    argument - the iterable tested to see if it does not contain null elements; may be null or empty
    
    errorMessage - the errorMessage
    
    Returns:
    
    the argument that was tested.
    
    Throws:
    
    NullPointerException - if argument contains a null element inside
  - checkNotNull
```
public static <T> T checkNotNull(T argument)
```
    Tests if an argument is not null.
    
    Parameters:
    
    argument - the argument tested to see if it is not null.
    
    Returns:
    
    the argument that was tested.
    
    Throws:
    
    NullPointerException - if argument is null
  - isNotNull
```
public static <E> E isNotNull(E argument,
                              String argName)
```
    Tests if a string is not null.
    
    Parameters:
    
    argument - the string tested to see if it is not null.
    
    argName - the string name (used in message if an error is thrown).
    
    Returns:
    
    the string argument that was tested.
    
    Throws:
    
    IllegalArgumentException - if the string is null.
  - checkNotNegative
```
public static long checkNotNegative(long value,
                                    String errorMessage)
```
    Tests if a value is not negative.
    
    Parameters:
    
    value - the value tested to see if it is not negative.
    
    errorMessage - the errorMessage
    
    Returns:
    
    the value
    
    Throws:
    
    IllegalArgumentException - if the value is negative.
  - checkNotNegative
```
public static int checkNotNegative(int value,
                                   String errorMessage)
```
    Tests if a value is not negative.
    
    Parameters:
    
    value - the value tested to see if it is not negative.
    
    errorMessage - the errorMessage
    
    Returns:
    
    the value
    
    Throws:
    
    IllegalArgumentException - if the value is negative.
  - checkNegative
```
public static long checkNegative(long value,
                                 String errorMessage)
```
    Tests if a long value is not negative.
    
    Parameters:
    
    value - the long value tested to see if it is not negative.
    
    errorMessage - the message
    
    Returns:
    
    the value
    
    Throws:
    
    IllegalArgumentException - if the value is negative.
  - checkPositive
```
public static long checkPositive(long value,
                                 String errorMessage)
```
    Tests if a value is positive; so larger than 0.
    
    Parameters:
    
    value - the value tested to see if it is positive.
    
    errorMessage - the message
    
    Returns:
    
    the value
    
    Throws:
    
    IllegalArgumentException - if the value is not positive.
  - checkPositive
```
public static double checkPositive(double value,
                                   String errorMessage)
```
    Tests if a value is positive; so larger than 0.
    
    Parameters:
    
    value - the value tested to see if it is positive.
    
    errorMessage - the message
    
    Returns:
    
    the value
    
    Throws:
    
    IllegalArgumentException - if the value is not positive.
  - checkPositive
```
public static int checkPositive(int value,
                                String errorMessage)
```
    Tests if a value is positive; larger than 0.
    
    Parameters:
    
    value - the value tested to see if it is positive.
    
    errorMessage - the message
    
    Returns:
    
    the value
    
    Throws:
    
    IllegalArgumentException - if the value is not positive.
  - checkBackupCount
```
public static int checkBackupCount(int newBackupCount,
                                   int currentAsyncBackupCount)
```
    Tests if the newBackupCount count is valid.
    
    Parameters:
    
    newBackupCount - the number of sync backups
    
    currentAsyncBackupCount - the current number of async backups
    
    Returns:
    
    the newBackupCount
    
    Throws:
    
    IllegalArgumentException - if newBackupCount is smaller than 0, or larger than the maximum number of backups.
  - checkAsyncBackupCount
```
public static int checkAsyncBackupCount(int currentBackupCount,
                                        int newAsyncBackupCount)
```
    Tests if the newAsyncBackupCount count is valid.
    
    Parameters:
    
    currentBackupCount - the current number of backups
    
    newAsyncBackupCount - the new number of async backups
    
    Returns:
    
    the newAsyncBackupCount
    
    Throws:
    
    IllegalArgumentException - if asyncBackupCount is smaller than 0, or larger than the maximum number of backups.
  - checkInstanceOf
```
public static <E> E checkInstanceOf(Class<E> type,
                                    Object object,
                                    String errorMessage)
```
    Tests whether the supplied object is an instance of the supplied class type.
    
    Parameters:
    
    type - the expected type.
    
    object - the object tested against the expected type.
    
    errorMessage - the errorMessage
    
    Returns:
    
    the object argument.
    
    Throws:
    
    IllegalArgumentException - if the object is not an instance of the expected type.
  - checkInstanceOf
```
public static <E> E checkInstanceOf(Class<E> type,
                                    Object object)
```
  - checkNotInstanceOf
```
public static <E> E checkNotInstanceOf(Class type,
                                       E object,
                                       String errorMessage)
```
    Tests the supplied object to see if it is not a type of the supplied class.
    
    Parameters:
    
    type - the type that is not of the supplied class.
    
    object - the object tested against the type.
    
    errorMessage - the errorMessage
    
    Returns:
    
    the object argument.
    
    Throws:
    
    IllegalArgumentException - if the object is an instance of the type that is not of the expected class.
  - checkFalse
```
public static void checkFalse(boolean expression,
                              String errorMessage)
```
    Tests whether the supplied expression is false.
    
    Parameters:
    
    expression - the expression tested to see if it is false.
    
    errorMessage - the errorMessage
    
    Throws:
    
    IllegalArgumentException - if the supplied expression is true.
  - checkTrue
```
public static void checkTrue(boolean expression,
                             String errorMessage)
```
    Tests whether the supplied expression is true.
    
    Parameters:
    
    expression - the expression tested to see if it is true.
    
    errorMessage - the errorMessage
    
    Throws:
    
    IllegalArgumentException - if the supplied expression is false.
  - checkHasNext
```
public static <T> Iterator<T> checkHasNext(Iterator<T> iterator,
                                           String message)
                                    throws NoSuchElementException
```
    Check if iterator has next element. If not throw NoSuchElementException
    
    Parameters:
    
    iterator -
    
    message -
    
    Returns:
    
    the iterator itself
    
    Throws:
    
    NoSuchElementException - if iterator.hasNext returns false
  - checkState
```
public static void checkState(boolean condition,
                              String message)
                       throws IllegalStateException
```
    Check the state of a condition
    
    Parameters:
    
    condition -
    
    message -
    
    Throws:
    
    IllegalStateException - if condition if false

Class Preconditions

Method Summary

Methods inherited from class java.lang.Object

Method Detail

checkHasText

checkNotNull

checkNoNullInside

checkNotNull

isNotNull

checkNotNegative

checkNotNegative

checkNegative

checkPositive

checkPositive

checkPositive

checkBackupCount

checkAsyncBackupCount

checkInstanceOf

checkInstanceOf

checkNotInstanceOf

checkFalse

checkTrue

checkHasNext

checkState