com.haulmont.bali.util

Class Preconditions

java.lang.Object

com.haulmont.bali.util.Preconditions

public final class Preconditions
extends java.lang.Object

Simple static methods to be called at the start of your own methods to verify correct arguments and state.

Method Summary

Modifier and Type	Method and Description
static void	checkNotEmptyString(java.lang.String value) Ensures that a string passed as a parameter to the calling method is not empty.
static void	checkNotEmptyString(java.lang.String value, java.lang.String errorMessage) Ensures that a string passed as a parameter to the calling method is not empty.
static void	checkNotEmptyString(java.lang.String value, java.lang.String errorMessageTemplate, java.lang.Object... errorMessageArgs) Ensures that a string passed as a parameter to the calling method is not empty.
static void	checkNotNullArgument(java.lang.Object reference) Ensures that an object reference passed as a parameter to the calling method is not null.
static void	checkNotNullArgument(java.lang.Object reference, java.lang.String errorMessage) Ensures that an object reference passed as a parameter to the calling method is not null.
static void	checkNotNullArgument(java.lang.Object reference, java.lang.String errorMessageTemplate, java.lang.Object... errorMessageArgs) Ensures that an object reference passed as a parameter to the calling method is not null.
static java.lang.String	formatExceptionArgs(java.lang.String template, java.lang.Object... args)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

checkNotEmptyString

public static void checkNotEmptyString(java.lang.String value)

Ensures that a string passed as a parameter to the calling method is not empty.

Parameters:

value - string value

Throws:

java.lang.IllegalArgumentException - if value is empty

checkNotEmptyString

public static void checkNotEmptyString(java.lang.String value,
                                       @Nullable
                                       java.lang.String errorMessage)

Ensures that a string passed as a parameter to the calling method is not empty.

Parameters:

value - string value

errorMessage - the exception message to use if the check fails; will be converted to a string using String.valueOf(Object)

Throws:

java.lang.IllegalArgumentException - if value is empty

checkNotEmptyString

public static void checkNotEmptyString(java.lang.String value,
                                       @Nullable
                                       java.lang.String errorMessageTemplate,
                                       @Nullable
                                       java.lang.Object... errorMessageArgs)

Ensures that a string passed as a parameter to the calling method is not empty.

Parameters:

value - string value

errorMessageTemplate - a template for the exception message should the check fail. The message is formed by replacing each %s placeholder in the template with an argument. These are matched by position - the first %s gets errorMessageArgs[0], etc.

Unmatched arguments will be appended to the formatted message in square braces. Unmatched placeholders will be left as-is.

errorMessageArgs - the arguments to be substituted into the message template. Arguments are converted to strings using String.valueOf(Object).

Throws:

java.lang.IllegalArgumentException - if value is empty

checkNotNullArgument

public static void checkNotNullArgument(java.lang.Object reference)

Ensures that an object reference passed as a parameter to the calling method is not null.

Parameters:

reference - an object reference

Throws:

java.lang.IllegalArgumentException - if reference is null

checkNotNullArgument

public static void checkNotNullArgument(java.lang.Object reference,
                                        @Nullable
                                        java.lang.String errorMessage)

Ensures that an object reference passed as a parameter to the calling method is not null.

Parameters:

reference - an object reference

errorMessage - the exception message to use if the check fails; will be converted to a string using String.valueOf(Object)

Throws:

java.lang.IllegalArgumentException - if reference is null

checkNotNullArgument

public static void checkNotNullArgument(java.lang.Object reference,
                                        @Nullable
                                        java.lang.String errorMessageTemplate,
                                        @Nullable
                                        java.lang.Object... errorMessageArgs)

Ensures that an object reference passed as a parameter to the calling method is not null.

Parameters:

reference - an object reference

errorMessageTemplate - a template for the exception message should the check fail. The message is formed by replacing each %s placeholder in the template with an argument. These are matched by position - the first %s gets errorMessageArgs[0], etc. Unmatched arguments will be appended to the formatted message in square braces. Unmatched placeholders will be left as-is.

errorMessageArgs - the arguments to be substituted into the message template. Arguments are converted to strings using String.valueOf(Object).

Throws:

java.lang.IllegalArgumentException - if reference is null

formatExceptionArgs

public static java.lang.String formatExceptionArgs(java.lang.String template,
                                                   @Nullable
                                                   java.lang.Object... args)