org.apache.commons.lang3
Class Validate

java.lang.Object
  extended by org.apache.commons.lang3.Validate

public class Validate
extends Object

This class assists in validating arguments. The validation methods are based along the following principles:

All exceptions messages are format strings as defined by the Java platform. For example:

 Validate.isTrue(i > 0, "The value must be greater than zero: %d", i);
 Validate.notNull(surname, "The surname must not be %s", null);
 

#ThreadSafe#

Since:
2.0
Version:
$Id: Validate.java 1199983 2011-11-09 21:41:24Z ggregory $
See Also:
String.format(String, Object...)

Constructor Summary
Validate()
          Constructor.
 
Method Summary
static
<T> void
exclusiveBetween(T start, T end, Comparable<T> value)
          Validate that the specified argument object fall between the two exclusive values specified; otherwise, throws an exception.
static
<T> void
exclusiveBetween(T start, T end, Comparable<T> value, String message, Object... values)
          Validate that the specified argument object fall between the two exclusive values specified; otherwise, throws an exception with the specified message.
static
<T> void
inclusiveBetween(T start, T end, Comparable<T> value)
          Validate that the specified argument object fall between the two inclusive values specified; otherwise, throws an exception.
static
<T> void
inclusiveBetween(T start, T end, Comparable<T> value, String message, Object... values)
          Validate that the specified argument object fall between the two inclusive values specified; otherwise, throws an exception with the specified message.
static void isAssignableFrom(Class<?> superType, Class<?> type)
          Validates that the argument can be converted to the specified class, if not, throws an exception.
static void isAssignableFrom(Class<?> superType, Class<?> type, String message, Object... values)
          Validates that the argument can be converted to the specified class, if not throws an exception.
static void isInstanceOf(Class<?> type, Object obj)
          Validates that the argument is an instance of the specified class, if not throws an exception.
static void isInstanceOf(Class<?> type, Object obj, String message, Object... values)
          Validate that the argument is an instance of the specified class; otherwise throwing an exception with the specified message.
static void isTrue(boolean expression)
          Validate that the argument condition is true; otherwise throwing an exception.
static void isTrue(boolean expression, String message, double value)
          Validate that the argument condition is true; otherwise throwing an exception with the specified message.
static void isTrue(boolean expression, String message, long value)
          Validate that the argument condition is true; otherwise throwing an exception with the specified message.
static void isTrue(boolean expression, String message, Object... values)
          Validate that the argument condition is true; otherwise throwing an exception with the specified message.
static void matchesPattern(CharSequence input, String pattern)
          Validate that the specified argument character sequence matches the specified regular expression pattern; otherwise throwing an exception.
static void matchesPattern(CharSequence input, String pattern, String message, Object... values)
          Validate that the specified argument character sequence matches the specified regular expression pattern; otherwise throwing an exception with the specified message.
static
<T extends Iterable<?>>
T
noNullElements(T iterable)
          Validate that the specified argument iterable is neither null nor contains any elements that are null; otherwise throwing an exception.
static
<T> T[]
noNullElements(T[] array)
          Validate that the specified argument array is neither null nor contains any elements that are null; otherwise throwing an exception.
static
<T> T[]
noNullElements(T[] array, String message, Object... values)
          Validate that the specified argument array is neither null nor contains any elements that are null; otherwise throwing an exception with the specified message.
static
<T extends Iterable<?>>
T
noNullElements(T iterable, String message, Object... values)
          Validate that the specified argument iterable is neither null nor contains any elements that are null; otherwise throwing an exception with the specified message.
static
<T extends CharSequence>
T
notBlank(T chars)
          Validate that the specified argument character sequence is neither null, a length of zero (no characters), empty nor whitespace; otherwise throwing an exception.
static
<T extends CharSequence>
T
notBlank(T chars, String message, Object... values)
          Validate that the specified argument character sequence is neither null, a length of zero (no characters), empty nor whitespace; otherwise throwing an exception with the specified message.
static
<T extends CharSequence>
T
notEmpty(T chars)
          Validate that the specified argument character sequence is neither null nor a length of zero (no characters); otherwise throwing an exception with the specified message.
static
<T extends Collection<?>>
T
notEmpty(T collection)
          Validate that the specified argument collection is neither null nor a size of zero (no elements); otherwise throwing an exception.
static
<T extends Map<?,?>>
T
notEmpty(T map)
          Validate that the specified argument map is neither null nor a size of zero (no elements); otherwise throwing an exception.
static
<T> T[]
notEmpty(T[] array)
          Validate that the specified argument array is neither null nor a length of zero (no elements); otherwise throwing an exception.
static
<T> T[]
notEmpty(T[] array, String message, Object... values)
          Validate that the specified argument array is neither null nor a length of zero (no elements); otherwise throwing an exception with the specified message.
static
<T extends CharSequence>
T
notEmpty(T chars, String message, Object... values)
          Validate that the specified argument character sequence is neither null nor a length of zero (no characters); otherwise throwing an exception with the specified message.
static
<T extends Collection<?>>
T
notEmpty(T collection, String message, Object... values)
          Validate that the specified argument collection is neither null nor a size of zero (no elements); otherwise throwing an exception with the specified message.
static
<T extends Map<?,?>>
T
notEmpty(T map, String message, Object... values)
          Validate that the specified argument map is neither null nor a size of zero (no elements); otherwise throwing an exception with the specified message.
static
<T> T
notNull(T object)
          Validate that the specified argument is not null; otherwise throwing an exception.
static
<T> T
notNull(T object, String message, Object... values)
          Validate that the specified argument is not null; otherwise throwing an exception with the specified message.
static
<T> T[]
validIndex(T[] array, int index)
          Validates that the index is within the bounds of the argument array; otherwise throwing an exception.
static
<T> T[]
validIndex(T[] array, int index, String message, Object... values)
          Validates that the index is within the bounds of the argument array; otherwise throwing an exception with the specified message.
static
<T extends CharSequence>
T
validIndex(T chars, int index)
          Validates that the index is within the bounds of the argument character sequence; otherwise throwing an exception.
static
<T extends Collection<?>>
T
validIndex(T collection, int index)
          Validates that the index is within the bounds of the argument collection; otherwise throwing an exception.
static
<T extends CharSequence>
T
validIndex(T chars, int index, String message, Object... values)
          Validates that the index is within the bounds of the argument character sequence; otherwise throwing an exception with the specified message.
static
<T extends Collection<?>>
T
validIndex(T collection, int index, String message, Object... values)
          Validates that the index is within the bounds of the argument collection; otherwise throwing an exception with the specified message.
static void validState(boolean expression)
          Validate that the stateful condition is true; otherwise throwing an exception.
static void validState(boolean expression, String message, Object... values)
          Validate that the stateful condition is true; otherwise throwing an exception with the specified message.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Validate

public Validate()
Constructor. This class should not normally be instantiated.

Method Detail

isTrue

public static void isTrue(boolean expression,
                          String message,
                          long value)

Validate that the argument condition is true; otherwise throwing an exception with the specified message. This method is useful when validating according to an arbitrary boolean expression, such as validating a primitive number or using your own custom validation expression.

Validate.isTrue(i > 0.0, "The value must be greater than zero: %d", i);

For performance reasons, the long value is passed as a separate parameter and appended to the exception message only in the case of an error.

Parameters:
expression - the boolean expression to check
message - the String.format(String, Object...) exception message if invalid, not null
value - the value to append to the message when invalid
Throws:
IllegalArgumentException - if expression is false
See Also:
isTrue(boolean), isTrue(boolean, String, double), isTrue(boolean, String, Object...)

isTrue

public static void isTrue(boolean expression,
                          String message,
                          double value)

Validate that the argument condition is true; otherwise throwing an exception with the specified message. This method is useful when validating according to an arbitrary boolean expression, such as validating a primitive number or using your own custom validation expression.

Validate.isTrue(d > 0.0, "The value must be greater than zero: %s", d);

For performance reasons, the double value is passed as a separate parameter and appended to the exception message only in the case of an error.

Parameters:
expression - the boolean expression to check
message - the String.format(String, Object...) exception message if invalid, not null
value - the value to append to the message when invalid
Throws:
IllegalArgumentException - if expression is false
See Also:
isTrue(boolean), isTrue(boolean, String, long), isTrue(boolean, String, Object...)

isTrue

public static void isTrue(boolean expression,
                          String message,
                          Object... values)

Validate that the argument condition is true; otherwise throwing an exception with the specified message. This method is useful when validating according to an arbitrary boolean expression, such as validating a primitive number or using your own custom validation expression.

 Validate.isTrue(i >= min && i <= max, "The value must be between %d and %d", min, max);
 Validate.isTrue(myObject.isOk(), "The object is not okay");

Parameters:
expression - the boolean expression to check
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Throws:
IllegalArgumentException - if expression is false
See Also:
isTrue(boolean), isTrue(boolean, String, long), isTrue(boolean, String, double)

isTrue

public static void isTrue(boolean expression)

Validate that the argument condition is true; otherwise throwing an exception. This method is useful when validating according to an arbitrary boolean expression, such as validating a primitive number or using your own custom validation expression.

 Validate.isTrue(i > 0);
 Validate.isTrue(myObject.isOk());

The message of the exception is "The validated expression is false".

Parameters:
expression - the boolean expression to check
Throws:
IllegalArgumentException - if expression is false
See Also:
isTrue(boolean, String, long), isTrue(boolean, String, double), isTrue(boolean, String, Object...)

notNull

public static <T> T notNull(T object)

Validate that the specified argument is not null; otherwise throwing an exception.

Validate.notNull(myObject, "The object must not be null");

The message of the exception is "The validated object is null".

Type Parameters:
T - the object type
Parameters:
object - the object to check
Returns:
the validated object (never null for method chaining)
Throws:
NullPointerException - if the object is null
See Also:
notNull(Object, String, Object...)

notNull

public static <T> T notNull(T object,
                            String message,
                            Object... values)

Validate that the specified argument is not null; otherwise throwing an exception with the specified message.

Validate.notNull(myObject, "The object must not be null");

Type Parameters:
T - the object type
Parameters:
object - the object to check
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message
Returns:
the validated object (never null for method chaining)
Throws:
NullPointerException - if the object is null
See Also:
notNull(Object)

notEmpty

public static <T> T[] notEmpty(T[] array,
                               String message,
                               Object... values)

Validate that the specified argument array is neither null nor a length of zero (no elements); otherwise throwing an exception with the specified message.

Validate.notEmpty(myArray, "The array must not be empty");

Type Parameters:
T - the array type
Parameters:
array - the array to check, validated not null by this method
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Returns:
the validated array (never null method for chaining)
Throws:
NullPointerException - if the array is null
IllegalArgumentException - if the array is empty
See Also:
notEmpty(Object[])

notEmpty

public static <T> T[] notEmpty(T[] array)

Validate that the specified argument array is neither null nor a length of zero (no elements); otherwise throwing an exception.

Validate.notEmpty(myArray);

The message in the exception is "The validated array is empty".

Type Parameters:
T - the array type
Parameters:
array - the array to check, validated not null by this method
Returns:
the validated array (never null method for chaining)
Throws:
NullPointerException - if the array is null
IllegalArgumentException - if the array is empty
See Also:
notEmpty(Object[], String, Object...)

notEmpty

public static <T extends Collection<?>> T notEmpty(T collection,
                                                   String message,
                                                   Object... values)

Validate that the specified argument collection is neither null nor a size of zero (no elements); otherwise throwing an exception with the specified message.

Validate.notEmpty(myCollection, "The collection must not be empty");

Type Parameters:
T - the collection type
Parameters:
collection - the collection to check, validated not null by this method
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Returns:
the validated collection (never null method for chaining)
Throws:
NullPointerException - if the collection is null
IllegalArgumentException - if the collection is empty
See Also:
notEmpty(Object[])

notEmpty

public static <T extends Collection<?>> T notEmpty(T collection)

Validate that the specified argument collection is neither null nor a size of zero (no elements); otherwise throwing an exception.

Validate.notEmpty(myCollection);

The message in the exception is "The validated collection is empty".

Type Parameters:
T - the collection type
Parameters:
collection - the collection to check, validated not null by this method
Returns:
the validated collection (never null method for chaining)
Throws:
NullPointerException - if the collection is null
IllegalArgumentException - if the collection is empty
See Also:
notEmpty(Collection, String, Object...)

notEmpty

public static <T extends Map<?,?>> T notEmpty(T map,
                                              String message,
                                              Object... values)

Validate that the specified argument map is neither null nor a size of zero (no elements); otherwise throwing an exception with the specified message.

Validate.notEmpty(myMap, "The map must not be empty");

Type Parameters:
T - the map type
Parameters:
map - the map to check, validated not null by this method
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Returns:
the validated map (never null method for chaining)
Throws:
NullPointerException - if the map is null
IllegalArgumentException - if the map is empty
See Also:
notEmpty(Object[])

notEmpty

public static <T extends Map<?,?>> T notEmpty(T map)

Validate that the specified argument map is neither null nor a size of zero (no elements); otherwise throwing an exception.

Validate.notEmpty(myMap);

The message in the exception is "The validated map is empty".

Type Parameters:
T - the map type
Parameters:
map - the map to check, validated not null by this method
Returns:
the validated map (never null method for chaining)
Throws:
NullPointerException - if the map is null
IllegalArgumentException - if the map is empty
See Also:
notEmpty(Map, String, Object...)

notEmpty

public static <T extends CharSequence> T notEmpty(T chars,
                                                  String message,
                                                  Object... values)

Validate that the specified argument character sequence is neither null nor a length of zero (no characters); otherwise throwing an exception with the specified message.

Validate.notEmpty(myString, "The string must not be empty");

Type Parameters:
T - the character sequence type
Parameters:
chars - the character sequence to check, validated not null by this method
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Returns:
the validated character sequence (never null method for chaining)
Throws:
NullPointerException - if the character sequence is null
IllegalArgumentException - if the character sequence is empty
See Also:
notEmpty(CharSequence)

notEmpty

public static <T extends CharSequence> T notEmpty(T chars)

Validate that the specified argument character sequence is neither null nor a length of zero (no characters); otherwise throwing an exception with the specified message.

Validate.notEmpty(myString);

The message in the exception is "The validated character sequence is empty".

Type Parameters:
T - the character sequence type
Parameters:
chars - the character sequence to check, validated not null by this method
Returns:
the validated character sequence (never null method for chaining)
Throws:
NullPointerException - if the character sequence is null
IllegalArgumentException - if the character sequence is empty
See Also:
notEmpty(CharSequence, String, Object...)

notBlank

public static <T extends CharSequence> T notBlank(T chars,
                                                  String message,
                                                  Object... values)

Validate that the specified argument character sequence is neither null, a length of zero (no characters), empty nor whitespace; otherwise throwing an exception with the specified message.

Validate.notBlank(myString, "The string must not be blank");

Type Parameters:
T - the character sequence type
Parameters:
chars - the character sequence to check, validated not null by this method
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Returns:
the validated character sequence (never null method for chaining)
Throws:
NullPointerException - if the character sequence is null
IllegalArgumentException - if the character sequence is blank
Since:
3.0
See Also:
notBlank(CharSequence)

notBlank

public static <T extends CharSequence> T notBlank(T chars)

Validate that the specified argument character sequence is neither null, a length of zero (no characters), empty nor whitespace; otherwise throwing an exception.

Validate.notBlank(myString);

The message in the exception is "The validated character sequence is blank".

Type Parameters:
T - the character sequence type
Parameters:
chars - the character sequence to check, validated not null by this method
Returns:
the validated character sequence (never null method for chaining)
Throws:
NullPointerException - if the character sequence is null
IllegalArgumentException - if the character sequence is blank
Since:
3.0
See Also:
notBlank(CharSequence, String, Object...)

noNullElements

public static <T> T[] noNullElements(T[] array,
                                     String message,
                                     Object... values)

Validate that the specified argument array is neither null nor contains any elements that are null; otherwise throwing an exception with the specified message.

Validate.noNullElements(myArray, "The array contain null at position %d");

If the array is null, then the message in the exception is "The validated object is null".

If the array has a null element, then the iteration index of the invalid element is appended to the values argument.

Type Parameters:
T - the array type
Parameters:
array - the array to check, validated not null by this method
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Returns:
the validated array (never null method for chaining)
Throws:
NullPointerException - if the array is null
IllegalArgumentException - if an element is null
See Also:
noNullElements(Object[])

noNullElements

public static <T> T[] noNullElements(T[] array)

Validate that the specified argument array is neither null nor contains any elements that are null; otherwise throwing an exception.

Validate.noNullElements(myArray);

If the array is null, then the message in the exception is "The validated object is null".

If the array has a null element, then the message in the exception is "The validated array contains null element at index: " followed by the index.

Type Parameters:
T - the array type
Parameters:
array - the array to check, validated not null by this method
Returns:
the validated array (never null method for chaining)
Throws:
NullPointerException - if the array is null
IllegalArgumentException - if an element is null
See Also:
noNullElements(Object[], String, Object...)

noNullElements

public static <T extends Iterable<?>> T noNullElements(T iterable,
                                                       String message,
                                                       Object... values)

Validate that the specified argument iterable is neither null nor contains any elements that are null; otherwise throwing an exception with the specified message.

Validate.noNullElements(myCollection, "The collection contains null at position %d");

If the iterable is null, then the message in the exception is "The validated object is null".

If the iterable has a null element, then the iteration index of the invalid element is appended to the values argument.

Type Parameters:
T - the iterable type
Parameters:
iterable - the iterable to check, validated not null by this method
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Returns:
the validated iterable (never null method for chaining)
Throws:
NullPointerException - if the array is null
IllegalArgumentException - if an element is null
See Also:
noNullElements(Iterable)

noNullElements

public static <T extends Iterable<?>> T noNullElements(T iterable)

Validate that the specified argument iterable is neither null nor contains any elements that are null; otherwise throwing an exception.

Validate.noNullElements(myCollection);

If the iterable is null, then the message in the exception is "The validated object is null".

If the array has a null element, then the message in the exception is "The validated iterable contains null element at index: " followed by the index.

Type Parameters:
T - the iterable type
Parameters:
iterable - the iterable to check, validated not null by this method
Returns:
the validated iterable (never null method for chaining)
Throws:
NullPointerException - if the array is null
IllegalArgumentException - if an element is null
See Also:
noNullElements(Iterable, String, Object...)

validIndex

public static <T> T[] validIndex(T[] array,
                                 int index,
                                 String message,
                                 Object... values)

Validates that the index is within the bounds of the argument array; otherwise throwing an exception with the specified message.

Validate.validIndex(myArray, 2, "The array index is invalid: ");

If the array is null, then the message of the exception is "The validated object is null".

Type Parameters:
T - the array type
Parameters:
array - the array to check, validated not null by this method
index - the index to check
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Returns:
the validated array (never null for method chaining)
Throws:
NullPointerException - if the array is null
IndexOutOfBoundsException - if the index is invalid
Since:
3.0
See Also:
validIndex(Object[], int)

validIndex

public static <T> T[] validIndex(T[] array,
                                 int index)

Validates that the index is within the bounds of the argument array; otherwise throwing an exception.

Validate.validIndex(myArray, 2);

If the array is null, then the message of the exception is "The validated object is null".

If the index is invalid, then the message of the exception is "The validated array index is invalid: " followed by the index.

Type Parameters:
T - the array type
Parameters:
array - the array to check, validated not null by this method
index - the index to check
Returns:
the validated array (never null for method chaining)
Throws:
NullPointerException - if the array is null
IndexOutOfBoundsException - if the index is invalid
Since:
3.0
See Also:
validIndex(Object[], int, String, Object...)

validIndex

public static <T extends Collection<?>> T validIndex(T collection,
                                                     int index,
                                                     String message,
                                                     Object... values)

Validates that the index is within the bounds of the argument collection; otherwise throwing an exception with the specified message.

Validate.validIndex(myCollection, 2, "The collection index is invalid: ");

If the collection is null, then the message of the exception is "The validated object is null".

Type Parameters:
T - the collection type
Parameters:
collection - the collection to check, validated not null by this method
index - the index to check
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Returns:
the validated collection (never null for chaining)
Throws:
NullPointerException - if the collection is null
IndexOutOfBoundsException - if the index is invalid
Since:
3.0
See Also:
validIndex(Collection, int)

validIndex

public static <T extends Collection<?>> T validIndex(T collection,
                                                     int index)

Validates that the index is within the bounds of the argument collection; otherwise throwing an exception.

Validate.validIndex(myCollection, 2);

If the index is invalid, then the message of the exception is "The validated collection index is invalid: " followed by the index.

Type Parameters:
T - the collection type
Parameters:
collection - the collection to check, validated not null by this method
index - the index to check
Returns:
the validated collection (never null for method chaining)
Throws:
NullPointerException - if the collection is null
IndexOutOfBoundsException - if the index is invalid
Since:
3.0
See Also:
validIndex(Collection, int, String, Object...)

validIndex

public static <T extends CharSequence> T validIndex(T chars,
                                                    int index,
                                                    String message,
                                                    Object... values)

Validates that the index is within the bounds of the argument character sequence; otherwise throwing an exception with the specified message.

Validate.validIndex(myStr, 2, "The string index is invalid: ");

If the character sequence is null, then the message of the exception is "The validated object is null".

Type Parameters:
T - the character sequence type
Parameters:
chars - the character sequence to check, validated not null by this method
index - the index to check
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Returns:
the validated character sequence (never null for method chaining)
Throws:
NullPointerException - if the character sequence is null
IndexOutOfBoundsException - if the index is invalid
Since:
3.0
See Also:
validIndex(CharSequence, int)

validIndex

public static <T extends CharSequence> T validIndex(T chars,
                                                    int index)

Validates that the index is within the bounds of the argument character sequence; otherwise throwing an exception.

Validate.validIndex(myStr, 2);

If the character sequence is null, then the message of the exception is "The validated object is null".

If the index is invalid, then the message of the exception is "The validated character sequence index is invalid: " followed by the index.

Type Parameters:
T - the character sequence type
Parameters:
chars - the character sequence to check, validated not null by this method
index - the index to check
Returns:
the validated character sequence (never null for method chaining)
Throws:
NullPointerException - if the character sequence is null
IndexOutOfBoundsException - if the index is invalid
Since:
3.0
See Also:
validIndex(CharSequence, int, String, Object...)

validState

public static void validState(boolean expression)

Validate that the stateful condition is true; otherwise throwing an exception. This method is useful when validating according to an arbitrary boolean expression, such as validating a primitive number or using your own custom validation expression.

 Validate.validState(field > 0);
 Validate.validState(this.isOk());

The message of the exception is "The validated state is false".

Parameters:
expression - the boolean expression to check
Throws:
IllegalStateException - if expression is false
Since:
3.0
See Also:
validState(boolean, String, Object...)

validState

public static void validState(boolean expression,
                              String message,
                              Object... values)

Validate that the stateful condition is true; otherwise throwing an exception with the specified message. This method is useful when validating according to an arbitrary boolean expression, such as validating a primitive number or using your own custom validation expression.

Validate.validState(this.isOk(), "The state is not OK: %s", myObject);

Parameters:
expression - the boolean expression to check
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Throws:
IllegalStateException - if expression is false
Since:
3.0
See Also:
validState(boolean)

matchesPattern

public static void matchesPattern(CharSequence input,
                                  String pattern)

Validate that the specified argument character sequence matches the specified regular expression pattern; otherwise throwing an exception.

Validate.matchesPattern("hi", "[a-z]*");

The syntax of the pattern is the one used in the Pattern class.

Parameters:
input - the character sequence to validate, not null
pattern - the regular expression pattern, not null
Throws:
IllegalArgumentException - if the character sequence does not match the pattern
Since:
3.0
See Also:
matchesPattern(CharSequence, String, String, Object...)

matchesPattern

public static void matchesPattern(CharSequence input,
                                  String pattern,
                                  String message,
                                  Object... values)

Validate that the specified argument character sequence matches the specified regular expression pattern; otherwise throwing an exception with the specified message.

Validate.matchesPattern("hi", "[a-z]*", "%s does not match %s", "hi" "[a-z]*");

The syntax of the pattern is the one used in the Pattern class.

Parameters:
input - the character sequence to validate, not null
pattern - the regular expression pattern, not null
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Throws:
IllegalArgumentException - if the character sequence does not match the pattern
Since:
3.0
See Also:
matchesPattern(CharSequence, String)

inclusiveBetween

public static <T> void inclusiveBetween(T start,
                                        T end,
                                        Comparable<T> value)

Validate that the specified argument object fall between the two inclusive values specified; otherwise, throws an exception.

Validate.inclusiveBetween(0, 2, 1);

Type Parameters:
T - the type of the argument object
Parameters:
start - the inclusive start value, not null
end - the inclusive end value, not null
value - the object to validate, not null
Throws:
IllegalArgumentException - if the value falls out of the boundaries
Since:
3.0
See Also:
inclusiveBetween(Object, Object, Comparable, String, Object...)

inclusiveBetween

public static <T> void inclusiveBetween(T start,
                                        T end,
                                        Comparable<T> value,
                                        String message,
                                        Object... values)

Validate that the specified argument object fall between the two inclusive values specified; otherwise, throws an exception with the specified message.

Validate.inclusiveBetween(0, 2, 1, "Not in boundaries");

Type Parameters:
T - the type of the argument object
Parameters:
start - the inclusive start value, not null
end - the inclusive end value, not null
value - the object to validate, not null
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Throws:
IllegalArgumentException - if the value falls out of the boundaries
Since:
3.0
See Also:
inclusiveBetween(Object, Object, Comparable)

exclusiveBetween

public static <T> void exclusiveBetween(T start,
                                        T end,
                                        Comparable<T> value)

Validate that the specified argument object fall between the two exclusive values specified; otherwise, throws an exception.

Validate.inclusiveBetween(0, 2, 1);

Type Parameters:
T - the type of the argument object
Parameters:
start - the exclusive start value, not null
end - the exclusive end value, not null
value - the object to validate, not null
Throws:
IllegalArgumentException - if the value falls out of the boundaries
Since:
3.0
See Also:
exclusiveBetween(Object, Object, Comparable, String, Object...)

exclusiveBetween

public static <T> void exclusiveBetween(T start,
                                        T end,
                                        Comparable<T> value,
                                        String message,
                                        Object... values)

Validate that the specified argument object fall between the two exclusive values specified; otherwise, throws an exception with the specified message.

Validate.inclusiveBetween(0, 2, 1, "Not in boundaries");

Type Parameters:
T - the type of the argument object
Parameters:
start - the exclusive start value, not null
end - the exclusive end value, not null
value - the object to validate, not null
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Throws:
IllegalArgumentException - if the value falls out of the boundaries
Since:
3.0
See Also:
exclusiveBetween(Object, Object, Comparable)

isInstanceOf

public static void isInstanceOf(Class<?> type,
                                Object obj)
Validates that the argument is an instance of the specified class, if not throws an exception.

This method is useful when validating according to an arbitrary class

Validate.isInstanceOf(OkClass.class, object);

The message of the exception is "Expected type: {type}, actual: {obj_type}"

Parameters:
type - the class the object must be validated against, not null
obj - the object to check, null throws an exception
Throws:
IllegalArgumentException - if argument is not of specified class
Since:
3.0
See Also:
isInstanceOf(Class, Object, String, Object...)

isInstanceOf

public static void isInstanceOf(Class<?> type,
                                Object obj,
                                String message,
                                Object... values)

Validate that the argument is an instance of the specified class; otherwise throwing an exception with the specified message. This method is useful when validating according to an arbitrary class

Validate.isInstanceOf(OkClass.classs, object, "Wrong class, object is of class %s",
   object.getClass().getName());

Parameters:
type - the class the object must be validated against, not null
obj - the object to check, null throws an exception
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Throws:
IllegalArgumentException - if argument is not of specified class
Since:
3.0
See Also:
isInstanceOf(Class, Object)

isAssignableFrom

public static void isAssignableFrom(Class<?> superType,
                                    Class<?> type)
Validates that the argument can be converted to the specified class, if not, throws an exception.

This method is useful when validating that there will be no casting errors.

Validate.isAssignableFrom(SuperClass.class, object.getClass());

The message format of the exception is "Cannot assign {type} to {superType}"

Parameters:
superType - the class the class must be validated against, not null
type - the class to check, not null
Throws:
IllegalArgumentException - if type argument is not assignable to the specified superType
Since:
3.0
See Also:
isAssignableFrom(Class, Class, String, Object...)

isAssignableFrom

public static void isAssignableFrom(Class<?> superType,
                                    Class<?> type,
                                    String message,
                                    Object... values)
Validates that the argument can be converted to the specified class, if not throws an exception.

This method is useful when validating if there will be no casting errors.

Validate.isAssignableFrom(SuperClass.class, object.getClass());

The message of the exception is "The validated object can not be converted to the" followed by the name of the class and "class"

Parameters:
superType - the class the class must be validated against, not null
type - the class to check, not null
message - the String.format(String, Object...) exception message if invalid, not null
values - the optional values for the formatted exception message, null array not recommended
Throws:
IllegalArgumentException - if argument can not be converted to the specified class
See Also:
isAssignableFrom(Class, Class)


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