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How to use checkState method of org.fluentlenium.utils.Preconditions class

Best FluentLenium code snippet using org.fluentlenium.utils.Preconditions.checkState

Source:FluentDriver.java

...33import java.util.Date;34import java.util.Set;35import static org.fluentlenium.core.domain.ElementUtils.getWrappedElement;36import static org.fluentlenium.utils.Preconditions.checkArgument;37import static org.fluentlenium.utils.Preconditions.checkState;38/**39 * Wrapper class for a {@link WebDriver} instance which also offers shortcut and convenience methods,40 * as well as methods to work with mouse, keyboard and windows.41 */42@SuppressWarnings("PMD.GodClass")43public class FluentDriver extends AbstractFluentDriverSearchControl { // NOPMD GodClass44    private static final Logger LOGGER =45            LoggerFactory.getLogger(FluentDriver.class);46    private final Configuration configuration;47    private final ComponentsManager componentsManager;48    private final EventsRegistry events;49    private final ComponentsEventsRegistry componentsEventsRegistry;50    private final FluentInjector fluentInjector;51    private final CssControl cssControl; // NOPMD UnusedPrivateField52    private final Search search;53    private final WebDriver driver;54    private final MouseActions mouseActions;55    private final KeyboardActions keyboardActions;56    private final WindowAction windowAction;57    private final FluentDriverScreenshotPersister screenshotPersister;58    private final FluentDriverWrappedCapabilitiesProvider capabilitiesProvider;59    private final FluentDriverHtmlDumper htmlDumper;60    private final FluentDriverWait driverWait;61    private final PerformanceTiming performanceTiming;62    private final ChromiumControl chromiumControl;63    /**64     * Wrap the driver into a Fluent driver.65     *66     * @param driver        underlying selenium driver67     * @param configuration configuration68     * @param adapter       adapter fluent control interface69     */70    public FluentDriver(WebDriver driver, Configuration configuration, FluentControl adapter) {71        super(adapter);72        this.configuration = configuration;73        screenshotPersister = new FluentDriverScreenshotPersister(configuration, driver);74        capabilitiesProvider = new FluentDriverWrappedCapabilitiesProvider();75        htmlDumper = new FluentDriverHtmlDumper(configuration);76        componentsManager = new ComponentsManager(adapter);77        driverWait = new FluentDriverWait(configuration);78        this.driver = driver;79        search = new Search(driver, this, componentsManager, adapter);80        if (driver instanceof EventFiringWebDriver) {81            events = new EventsRegistry(this);82            componentsEventsRegistry = new ComponentsEventsRegistry(events, componentsManager);83        } else {84            events = null;85            componentsEventsRegistry = null;86        }87        mouseActions = new MouseActions(driver);88        keyboardActions = new KeyboardActions(driver);89        fluentInjector = new FluentInjector(adapter, events, componentsManager, new DefaultContainerInstantiator(this));90        cssControl = new CssControlImpl(adapter, adapter);91        windowAction = new WindowAction(adapter, componentsManager.getInstantiator(), driver);92        performanceTiming = new DefaultPerformanceTiming(driver);93        chromiumControl = new ChromiumControlImpl(driver);94        new FluentDriverTimeoutConfigurer(configuration, driver).configureDriver();95    }96    public Configuration getConfiguration() {97        return configuration;98    }99    @Override100    public void takeHtmlDump() {101        takeHtmlDump(new Date().getTime() + ".html");102    }103    @Override104    public void takeHtmlDump(String fileName) {105        htmlDumper.takeHtmlDump(fileName, () -> {106            synchronized (FluentDriver.class) {107                return $("html").first().html();108            }109        });110    }111    @Override112    public boolean canTakeScreenShot() {113        return getDriver() instanceof TakesScreenshot;114    }115    @Override116    public void takeScreenshot() {117        takeScreenshot(new Date().getTime() + ".png");118    }119    @Override120    public void takeScreenshot(String fileName) {121        if (!canTakeScreenShot()) {122            throw new WebDriverException("Current browser doesn't allow taking screenshot.");123        }124        screenshotPersister.persistScreenshot(fileName);125    }126    @Override127    public WebDriver getDriver() {128        if (driver instanceof AppiumDriver) {129            LOGGER.warn("You should use getAppiumDriver() method for mobile automation");130        }131        return driver;132    }133    @Override134    public AppiumDriver getAppiumDriver() {135        if (!(driver instanceof AppiumDriver)) {136            throw new WrongDriverException("Use getDriver() method for web automation");137        }138        return (AppiumDriver) driver;139    }140    @Override141    public EventsRegistry events() {142        return checkState(events, "An EventFiringWebDriver instance is required to use events. "143                + "You should set 'eventsEnabled' configuration property to 'true' "144                + "or override newWebDriver() to build an EventFiringWebDriver.");145    }146    @Override147    public MouseActions mouse() {148        return mouseActions;149    }150    @Override151    public KeyboardActions keyboard() {152        return keyboardActions;153    }154    @Override155    public WindowAction window() {156        return windowAction;...

Source:FluentPage.java

...14import java.net.URISyntaxException;15import java.net.URL;16import java.util.Optional;17import static org.fluentlenium.utils.Preconditions.checkArgumentBlank;18import static org.fluentlenium.utils.Preconditions.checkState;19import static org.fluentlenium.utils.UrlUtils.getAbsoluteUrlFromFile;20/**21 * Use the Page Object Pattern to have more resilient tests.22 * <p>23 * Extend this class and use @{@link PageUrl} and @{@link org.openqa.selenium.support.FindBy} annotations to provide24 * injectable Page Objects to FluentLenium.25 * <p>26 * Your page object class has to extend this class only when you use the {@code @PageUrl} annotation as well.27 * <p>28 * A subclass of {@code FluentPage} may also be annotated with one of Selenium's {@code @Find...} annotation to give an29 * identifier for this page. See {@link #isAt()} and {@link #isAtUsingSelector(By)}.30 */31public class FluentPage extends DefaultFluentContainer implements FluentPageControl {32    private final ClassAnnotations classAnnotations = new ClassAnnotations(getClass());33    private final PageUrlCache pageUrlCache = new PageUrlCache();34    /**35     * Creates a new fluent page.36     */37    public FluentPage() {38        // Default constructor39    }40    /**41     * Creates a new fluent page, using given fluent control.42     *43     * @param control fluent control44     */45    public FluentPage(FluentControl control) {46        super(control);47    }48    public ClassAnnotations getClassAnnotations() {49        return classAnnotations;50    }51    @Override52    public String getUrl() {53        return Optional.ofNullable(getPageUrlAnnotation())54                .map(pageUrl -> getPageUrlValue(pageUrl))55                .filter(url -> !url.isEmpty())56                .orElse(null);57    }58    /**59     * Parses the current URL and returns the parameter value for the argument parameter name.60     * <p>61     * In case the parameter is not defined in the {@link PageUrl} annotation,62     * or the parameter (mandatory or optional) has no value in the actual URL, this method returns {@code null}.63     * <p>64     * There is also caching in place to improve performance.65     * It compares the current URL with the cached URL, and if they are the same,66     * the parameter is returned from the cached values, otherwise the URL is parsed again and the parameters67     * are returned from the new URL.68     * <p>69     * Examples (for template + URL + paramName combinations):70     * <pre>71     * "/abc/{param1}/def/{param2}"  + "/abc/param1val/def/param2val" + "param1" -&gt; "param1val"72     * "/abc/{param1}/def/{param2}"  + "/abc/param1val/def/param2val" + "param4" -&gt; null73     * "/abc{?/param1}/def/{param2}" + "/abc/param1val/def/param2val" + "param1" -&gt; "param1val"74     * "/abc{?/param1}/def/{param2}" + "/abc/def/param2val"           + "param1" -&gt; ull75     * </pre>76     *77     * @param parameterName the parameter to get the value of78     * @return the desired parameter value or null if a value for the given parameter name is not present79     * @throws IllegalArgumentException when the argument param is null or empty80     */81    public String getParam(String parameterName) {82        checkArgumentBlank(parameterName, "The parameter name to query should not be blank.");83        String url = url();84        if (url.startsWith("file:///")) {85            try {86                url = new URL(url()).toURI().toString();87            } catch (URISyntaxException | MalformedURLException e) {88                e.printStackTrace();89            }90        }91        if (!url.equals(pageUrlCache.getUrl())) {92            pageUrlCache.cache(url, parseUrl(url).parameters());93        }94        return pageUrlCache.getParameter(parameterName);95    }96    @Override97    public String getUrl(Object... parameters) {98        return Optional.ofNullable(getUrl())99                .map(url -> toRenderedUrlTemplate(url, parameters))100                .orElse(null);101    }102    @Override103    public void isAt() {104        By by = classAnnotations.buildBy();105        if (by != null) {106            isAtUsingSelector(by);107        }108        isAtUrl(getUrl());109    }110    @Override111    public void isAt(Object... parameters) {112        isAtUrl(getUrl(parameters));113    }114    /**115     * URL-matching implementation for isAt().116     * Validates whether the page, determined by the argument URL template, is loaded.117     * <p>118     * If there is a {@link PageUrl} annotation applied on the class and it has the {@code file} attribute defined,119     * this method will skip the url parsing to skip URL check because it is not able to get local file path relatively.120     *121     * @param urlTemplate URL Template, must be non-null122     * @throws AssertionError when the current URL doesn't match the expected page URL123     */124    public void isAtUsingUrl(String urlTemplate) {125        if (!isLocalFile(getPageUrlAnnotation())) {126            UrlTemplate template = new UrlTemplate(urlTemplate);127            String url = url();128            ParsedUrlTemplate parse = template.parse(url);129            if (!parse.matches()) {130                throw new AssertionError(131                        String.format("Current URL [%s] doesn't match expected Page URL [%s]", url, urlTemplate));132            }133        }134    }135    /**136     * Validates whether the page, determined by the argument {@link By} object, is loaded.137     *138     * @param by by selector, must be non-null139     * @throws AssertionError if the element using the argument By is not found for the current page140     */141    public void isAtUsingSelector(By by) {142        try {143            $(by).first().now();144        } catch (TimeoutException | NoSuchElementException | StaleElementReferenceException e) {145            throw new AssertionError("@FindBy element not found for page " + getClass().getName(), e);146        }147    }148    @Override149    public <P extends FluentPage> P go() {150        return navigateTo(getUrl());151    }152    @Override153    public <P extends FluentPage> P go(Object... params) {154        return navigateTo(getUrl(params));155    }156    @Override157    public ParsedUrlTemplate parseUrl() {158        return parseUrl(url());159    }160    /**161     * Verifies whether page is loaded. Overwrite if necessary.162     * E.g. wait for {@link org.openqa.selenium.support.FindBy @FindBy} annotated component to render using {@link AwaitControl#await() await()}. <br>163     * Warning: Do NOT wait for {@link org.fluentlenium.core.annotation.Unshadow @Unshadow} components!164     */165    public void verifyIsLoaded() {166    }167    public void unshadowAllFields() {168        if (getDriver() != null) {169            new Unshadower(getDriver(), this).unshadowAllAnnotatedFields();170        }171    }172    @Override173    public ParsedUrlTemplate parseUrl(String url) {174        return Optional.ofNullable(getUrl())175                .map(templateUrl -> new UrlTemplate(templateUrl).parse(url))176                .orElseThrow(() -> new IllegalStateException(177                        "An URL should be defined on the page. Use @PageUrl annotation or override getUrl() method."));178    }179    private String toRenderedUrlTemplate(String url, Object[] parameters) {180        UrlTemplate template = new UrlTemplate(url);181        for (Object parameter : parameters) {182            template.add(parameter == null ? null : String.valueOf(parameter));183        }184        return template.render();185    }186    private void isAtUrl(String url) {187        if (url != null) {188            isAtUsingUrl(url);189        }190    }191    private String getPageUrlValue(PageUrl pageUrl) {192        return (isLocalFile(pageUrl) ? getAbsoluteUrlFromFile(pageUrl.file()) : StringUtils.EMPTY) + pageUrl.value();193    }194    private boolean isLocalFile(PageUrl pageUrl) {195        return pageUrl != null && !pageUrl.file().isEmpty();196    }197    private PageUrl getPageUrlAnnotation() {198        return getClass().isAnnotationPresent(PageUrl.class) ? getClass().getAnnotation(PageUrl.class) : null;199    }200    private <P extends FluentPage> P navigateTo(String url) {201        checkState(url, "An URL should be defined on the page. Use @PageUrl annotation or override getUrl() method.");202        goTo(url);203        return (P) this;204    }205}...

Source:AbstractReportExecutionListUiTest.java

...52    protected JobExecutionModel jem3;53    protected JobApiController controller;54    protected List<JobExecutionModel> models;55    public void setUp() throws Exception {56        Preconditions.checkState(topPagination != bottomPagination, "topPagination and bottomPagination cannot have the same value");57        jobModel = jobModelWithoutDependents();58        jobDbSetUp(jobModel);59        jem0 = jobExecutionModel();60        jem0.setExecutionStart(toEpoch("Sat Jan 07 2017 05:10"));61        jem0.setExecutionEnd(toEpoch("Sat Jan 07 2017 05:20"));62        jem0.setStatus(SUCCESS);63        jem0.setJobModel(jobModel);64        jobExecutionDbSetUp(jem0);65        jem1 = jobExecutionModel();66        jem1.setExecutionStart(toEpoch("Sat Jan 07 2017 05:30"));67        jem1.setExecutionEnd(toEpoch("Sat Jan 07 2017 05:40"));68        jem1.setStatus(FAILURE);69        jem1.setJobModel(jobModel);70        jobExecutionDbSetUp(jem1);...

checkState

Using AI Code Generation

1package test;2import org.fluentlenium.core.FluentPage;3import org.fluentlenium.core.annotation.Page;4import org.fluentlenium.utils.Preconditions;5import org.junit.Test;6import org.openqa.selenium.WebDriver;7import org.openqa.selenium.htmlunit.HtmlUnitDriver;8public class TestClass {9    private PageObject page;10    public void test() {11        WebDriver driver = new HtmlUnitDriver();12        page.go();13        Preconditions.checkState(page.isAt(), "This is not the page you are looking for!");14    }15}16package test;17import org.fluentlenium.core.FluentPage;18import org.fluentlenium.core.annotation.Page;19import org.fluentlenium.utils.Preconditions;20import org.junit.Test;21import org.openqa.selenium.WebDriver;22import org.openqa.selenium.htmlunit.HtmlUnitDriver;23public class TestClass {24    private PageObject page;25    public void test() {26        WebDriver driver = new HtmlUnitDriver();27        page.go();28        Preconditions.checkState(page.isAt(), "This is not the page you are looking for!");29    }30}31package test;32import org.fluentlenium.core.FluentPage;33import org.fluentlenium.core.annotation.Page;34import org.fluentlenium.utils.Preconditions;35import org.junit.Test;36import org.openqa.selenium.WebDriver;37import org.openqa.selenium.htmlunit.HtmlUnitDriver;38public class TestClass {39    private PageObject page;40    public void test() {41        WebDriver driver = new HtmlUnitDriver();42        page.go();43        Preconditions.checkState(page.isAt(), "This is not the page you are looking for!");44    }45}46package test;47import org.fluentlenium.core.FluentPage;48import org.fluentlenium.core.annotation.Page;49import org.fluentlenium.utils.Preconditions;50import org.junit.Test;51import org.openqa.selenium.WebDriver;52import org.openqa.selenium.htmlunit.HtmlUnitDriver;53public class TestClass {54    private PageObject page;

checkState

Using AI Code Generation

1import org.fluentlenium.core.FluentPage;2import org.fluentlenium.utils.Preconditions;3public class 4 extends FluentPage {4    public void checkState(boolean expression, String errorMessageTemplate, Object... errorMessageArgs) {5        Preconditions.checkState(expression, errorMessageTemplate, errorMessageArgs);6    }7}8    at org.fluentlenium.utils.Preconditions.checkState(Preconditions.java:56)9    at 4.checkState(4.java:7)10    at 4.main(4.java:11)

checkState

Using AI Code Generation

1import org.fluentlenium.core.FluentPage;2import org.fluentlenium.core.annotation.PageUrl;3import org.openqa.selenium.WebDriver;4public class GooglePage extends FluentPage {5  public void isAt() {6    Preconditions.checkState("Google" == title());7  }8  public void isAt(WebDriver driver) {9    Preconditions.checkState("Google" == title(driver));10  }11}12import org.fluentlenium.core.FluentPage;13import org.fluentlenium.core.annotation.PageUrl;14import org.openqa.selenium.WebDriver;15public class GooglePage extends FluentPage {16  public void isAt() {17    Preconditions.checkState("Google" == title());18  }19  public void isAt(WebDriver driver) {20    Preconditions.checkState("Google" == title(driver));21  }22}23import org.fluentlenium.core.FluentPage;24import org.fluentlenium.core.annotation.PageUrl;25import org.openqa.selenium.WebDriver;26public class GooglePage extends FluentPage {27  public void isAt() {28    Preconditions.checkState("Google" == title());29  }30  public void isAt(WebDriver driver) {31    Preconditions.checkState("Google" == title(driver));32  }33}34import org.fluentlenium.core.FluentPage;35import org.fluentlenium.core.annotation.PageUrl;36import org.openqa.selenium.WebDriver;37public class GooglePage extends FluentPage {38  public void isAt() {39    Preconditions.checkState("Google" == title());40  }41  public void isAt(WebDriver driver) {42    Preconditions.checkState("Google" == title(driver));43  }44}45import org.fluentlenium.core.FluentPage;46import org.fluentlenium.core.annotation.PageUrl;47import org.openqa.selenium.WebDriver;48public class GooglePage extends FluentPage {

checkState

Using AI Code Generation

1package org.fluentlenium.utils;2import org.fluentlenium.core.FluentPage;3import org.fluentlenium.core.domain.FluentWebElement;4import org.openqa.selenium.support.FindBy;5import org.testng.annotations.Test;6public class Preconditions extends FluentPage {7@FindBy(css = "button")8private FluentWebElement button;9public void checkState() {10button.click();11Preconditions.checkState(button.isDisplayed(), "Button is not displayed");12}13}14package org.fluentlenium.utils;15import org.fluentlenium.core.FluentPage;16import org.fluentlenium.core.domain.FluentWebElement;17import org.openqa.selenium.support.FindBy;18import org.testng.annotations.Test;19public class Preconditions extends FluentPage {20@FindBy(css = "button")21private FluentWebElement button;22public void checkState() {23button.click();24Preconditions.checkState(button.isDisplayed(), "Button is not displayed");25}26}27Selenium - FluentWait with Expected Condition | withTimeout()28Selenium - FluentWait with Expected Condition | pollingEvery()29Selenium - FluentWait with Expected Condition | ignoring()30Selenium - FluentWait with Expected Condition | ignoringException()31Selenium - FluentWait with Expected Condition | ignoringAll()32Selenium - FluentWait with Expected Condition | withMessage()33Selenium - FluentWait with Expected Condition | until()34Selenium - FluentWait with Expected Condition | untilFunction()35Selenium - FluentWait with Expected Condition | untilDriver()36Selenium - FluentWait with Expected Condition | untilElement()37Selenium - FluentWait with Expected Condition | untilList()38Selenium - FluentWait with Expected Condition | untilListEmpty()39Selenium - FluentWait with Expected Condition | untilListNotEmpty()40Selenium - FluentWait with Expected Condition | untilListSize()41Selenium - FluentWait with Expected Condition | untilListSizeLessThan()42Selenium - FluentWait with Expected Condition | untilListSizeLessThanOrEqual()

checkState

Using AI Code Generation

1package org.fluentlenium.utils;2import java.util.Collection;3import java.util.Map;4import java.util.Optional;5import java.util.function.Supplier;6public class Preconditions {7    private Preconditions() {8    }9    public static void checkState(boolean expression, String errorMessageTemplate, Object... errorMessageArgs) {10        if (!expression) {11            throw new IllegalStateException(String.format(errorMessageTemplate, errorMessageArgs));12        }13    }14    public static void checkState(boolean expression, Supplier<String> errorMessageSupplier) {15        if (!expression) {16            throw new IllegalStateException(errorMessageSupplier.get());17        }18    }19    public static void checkArgument(boolean expression, String errorMessageTemplate, Object... errorMessageArgs) {20        if (!expression) {21            throw new IllegalArgumentException(String.format(errorMessageTemplate, errorMessageArgs));22        }23    }24    public static void checkArgument(boolean expression, Supplier<String> errorMessageSupplier) {25        if (!expression) {26            throw new IllegalArgumentException(errorMessageSupplier.get());27        }28    }29    public static <T> T checkNotNull(T reference, String errorMessageTemplate, Object... errorMessageArgs) {30        if (reference == null) {31            throw new NullPointerException(String.format(errorMessageTemplate, errorMessageArgs));32        }33        return reference;34    }35    public static <T> T checkNotNull(T reference, Supplier<String> errorMessageSupplier) {36        if (reference == null) {37            throw new NullPointerException(errorMessageSupplier.get());38        }39        return reference;40    }41    public static <T> Optional<T> checkOptional(Optional<T> reference, String errorMessageTemplate, Object... errorMessageArgs) {42        if (!reference.isPresent()) {43            throw new NullPointerException(String.format(errorMessageTemplate, errorMessageArgs));44        }45        return reference;46    }47    public static <T> Optional<T> checkOptional(Optional<T> reference, Supplier<String> errorMessageSupplier) {48        if (!reference.isPresent()) {49            throw new NullPointerException(errorMessageSupplier.get());50        }51        return reference;52    }53    public static <T> T[] checkArray(T[] reference, String errorMessageTemplate, Object... errorMessageArgs) {54        if (reference == null || reference.length == 0) {55            throw new NullPointerException(String.format(errorMessageTemplate, errorMessageArgs));56        }57        return reference;58    }59    public static <T> T[] checkArray(T[] reference, Supplier<String> errorMessageSupplier) {60        if (reference == null || reference.length == 0) {61            throw new NullPointerException(errorMessageSupplier.get());62        }63        return reference;64    }

checkState

Using AI Code Generation

1package org.fluentlenium.utils;2import org.junit.Test;3import static org.fluentlenium.utils.Preconditions.checkState;4public class PreconditionsTest {5public void checkStateTest() {6checkState(5 > 6, "This is a test message");7}8}9    at org.fluentlenium.utils.Preconditions.checkState(Preconditions.java:45)10    at org.fluentlenium.utils.PreconditionsTest.checkStateTest(PreconditionsTest.java:9)

checkState

Using AI Code Generation

1package org.fluentlenium.utils;2import org.fluentlenium.utils.Preconditions;3public class PreconditionsExample {4    public static void main(String[] args) {5        Preconditions.checkState(true, "This is a message");6    }7}8	at org.fluentlenium.utils.Preconditions.checkState(Preconditions.java:55)9	at org.fluentlenium.utils.PreconditionsExample.main(PreconditionsExample.java:8)

checkState

Using AI Code Generation

1import org.fluentlenium.core.FluentPage;2import org.fluentlenium.core.annotation.PageUrl;3import org.openqa.selenium.WebDriver;4public class GooglePage extends FluentPage {5  public void isAt() {6    Preconditions.checkState("Google" == title());7  }8  public void isAt(WebDriver driver) {9    Preconditions.checkState("Google" == title(driver));10  }11}12import org.fluentlenium.core.FluentPage;13import org.fluentlenium.core.annotation.PageUrl;14import org.openqa.selenium.WebDriver;15public class GooglePage extends FluentPage {16  public void isAt() {17    Preconditions.checkState("Google" == title());18  }19  public void isAt(WebDriver driver) {20    Preconditions.checkState("Google" == title(driver));21  }22}23import org.fluentlenium.core.FluentPage;24import org.fluentlenium.core.annotation.PageUrl;25import org.openqa.selenium.WebDriver;26public class GooglePage extends FluentPage {27  public void isAt() {28    Preconditions.checkState("Google" == title());29  }30  public void isAt(WebDriver driver) {31    Preconditions.checkState("Google" == title(driver));32  }33}34import org.fluentlenium.core.FluentPage;35import org.fluentlenium.core.annotation.PageUrl;36import org.openqa.selenium.WebDriver;37public class GooglePage extends FluentPage {38  public void isAt() {39    Preconditions.checkState("Google" == title());40  }41  public void isAt(WebDriver driver) {42    Preconditions.checkState("Google" == title(driver));43  }44}45import org.fluentlenium.core.FluentPage;46import org.fluentlenium.core.annotation.PageUrl;47import org.openqa.selenium.WebDriver;48public class GooglePage extends FluentPage {

checkState

Using AI Code Generation

1package org.fluentlenium.utils;2import java.util.Collection;3import java.util.Map;4import java.util.Optional;5import java.util.function.Supplier;6public class Preconditions {7    private Preconditions() {8    }9    public static void checkState(boolean expression, String errorMessageTemplate, Object... errorMessageArgs) {10        if (!expression) {11            throw new IllegalStateException(String.format(errorMessageTemplate, errorMessageArgs));12        }13    }14    public static void checkState(boolean expression, Supplier<String> errorMessageSupplier) {15        if (!expression) {16            throw new IllegalStateException(errorMessageSupplier.get());17        }18    }19    public static void checkArgument(boolean expression, String errorMessageTemplate, Object... errorMessageArgs) {20        if (!expression) {21            throw new IllegalArgumentException(String.format(errorMessageTemplate, errorMessageArgs));22        }23    }24    public static void checkArgument(boolean expression, Supplier<String> errorMessageSupplier) {25        if (!expression) {26            throw new IllegalArgumentException(errorMessageSupplier.get());27        }28    }29    public static <T> T checkNotNull(T reference, String errorMessageTemplate, Object... errorMessageArgs) {30        if (reference == null) {31            throw new NullPointerException(String.format(errorMessageTemplate, errorMessageArgs));32        }33        return reference;34    }35    public static <T> T checkNotNull(T reference, Supplier<String> errorMessageSupplier) {36        if (reference == null) {37            throw new NullPointerException(errorMessageSupplier.get());38        }39        return reference;40    }41    public static <T> Optional<T> checkOptional(Optional<T> reference, String errorMessageTemplate, Object... errorMessageArgs) {42        if (!reference.isPresent()) {43            throw new NullPointerException(String.format(errorMessageTemplate, errorMessageArgs));44        }45        return reference;46    }47    public static <T> Optional<T> checkOptional(Optional<T> reference, Supplier<String> errorMessageSupplier) {48        if (!reference.isPresent()) {49            throw new NullPointerException(errorMessageSupplier.get());50        }51        return reference;52    }53    public static <T> T[] checkArray(T[] reference, String errorMessageTemplate, Object... errorMessageArgs) {54        if (reference == null || reference.length == 0) {55            throw new NullPointerException(String.format(errorMessageTemplate, errorMessageArgs));56        }57        return reference;58    }59    public static <T> T[] checkArray(T[] reference, Supplier<String> errorMessageSupplier) {60        if (reference == null || reference.length == 0) {61            throw new NullPointerException(errorMessageSupplier.get());62        }63        return reference;64    }

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