java.lang.Object
- com.firebase.ui.auth.util.Preconditions

public final class Preconditions
extends Object

Precondition checking utility methods.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`checkArgument(boolean expression, String errorMessage)`	Ensures the truth of an expression involving parameters to the calling method.
`static void`	`checkConfigured(Context context, String message, int... ids)`
`static <T> T`	`checkNotNull(T val, String errorMessageTemplate, Object... errorMessageArgs)`	Ensures that the provided value is not null, and throws a `NullPointerException` if it is null, with a message constructed from the provided error template and arguments.
`static void`	`checkUnset(Bundle b, String message, String... keys)`
`static int`	`checkValidStyle(Context context, int styleId, String errorMessageTemplate, Object... errorMessageArguments)`	Ensures that the provided identifier matches a known style resource, and throws an `IllegalArgumentException` if the resource cannot be found, or is not a style resource, with a message constructed from the provided error template and arguments.

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

Method Detail

checkNotNull

@NonNull
public static <T> T checkNotNull(@Nullable
                                 T val,
                                 @NonNull
                                 String errorMessageTemplate,
                                 @Nullable
                                 Object... errorMessageArgs)

Ensures that the provided value is not null, and throws a NullPointerException if it is null, with a message constructed from the provided error template and arguments.

checkValidStyle

@StyleRes
public static int checkValidStyle(@NonNull
                                  Context context,
                                  int styleId,
                                  @NonNull
                                  String errorMessageTemplate,
                                  @Nullable
                                  Object... errorMessageArguments)

Ensures that the provided identifier matches a known style resource, and throws an IllegalArgumentException if the resource cannot be found, or is not a style resource, with a message constructed from the provided error template and arguments.

checkUnset

public static void checkUnset(@NonNull
                              Bundle b,
                              @Nullable
                              String message,
                              @NonNull
                              String... keys)

checkConfigured

public static void checkConfigured(@NonNull
                                   Context context,
                                   @Nullable
                                   String message,
                                   @StringRes
                                   int... ids)

checkArgument
```
public static void checkArgument(boolean expression,
                                 String errorMessage)
```
Ensures the truth of an expression involving parameters to the calling method.

Parameters:

expression - a boolean expression

errorMessage - the exception message to use if the check fails

Throws:

IllegalArgumentException - if expression is false

Class Preconditions