java - 如何在java方法中使用动态代码？

Question

我有几乎多余的java方法。这些方法的主体始终相同。只有一两个java表达式(java代码行)不同。我想对这些几乎冗余的方法进行代码重构，但我正在寻找实现此目的的最佳方法。由于动态代码行，这并不容易。

以下是具有相同主体但包含动态 Java 代码的三个方法:

public static final boolean doSomething1() {
    Date date = new Date();
    long currentTime = date.getTime();
    long maxTime = currentTime + (TIMEOUT * 1000);

    while (currentTime < maxTime) { 
        try {
            //START OF MY DYNAMIC CODE
            //example 1
            for (WebElement element : list) {
                if (element.isDisplayed()) {
                    element.click();
                    return true;
                }                   
            }
            //END OF MY DYNAMIC CODE
        }
        catch (Exception e) {
            LOG.error("exception");
        }
        currentTime = new Date().getTime();
    }

    return false;
}

public static final boolean doSomething2() {
    Date date = new Date();
    long currentTime = date.getTime();
    long maxTime = currentTime + (TIMEOUT * 1000);

    while (currentTime < maxTime) { 
        try {
            //START OF MY DYNAMIC CODE
            //example 2
            for (WebElement webElement : webElementList) {   
                WebElement parent = getParentElement(webElement);
            }
            return true;
            //END OF MY DYNAMIC CODE
        }
        catch (Exception e) {
            LOG.error("exception");
        }
        currentTime = new Date().getTime();
    }

    return false;
}

public static final boolean doSomething3() {
    Date date = new Date();
    long currentTime = date.getTime();
    long maxTime = currentTime + (TIMEOUT * 1000);

    while (currentTime < maxTime) { 
        try {
            //START OF MY DYNAMIC CODE
            //example 3
            for (WebElement element : list) {
                if (element.isDisplayed() && element.getText().equalsIgnoreCase(size))
                    return true;
            }
            //END OF MY DYNAMIC CODE
        }
        catch (Exception e) {
            LOG.error("exception");
        }
        currentTime = new Date().getTime();
    }

    return false;
}       

那么，如何编写一种可以设置动态代码行的方法呢？

Answer 1

您可以使用Strategy Pattern .

使用 BooleanSupplier 的示例作为策略:

private static boolean doSomethingHelper(BooleanSupplier checker) { 
    Date date = new Date();
    long currentTime = date.getTime();
    long maxTime = currentTime + (TIMEOUT * 1000);

    while (currentTime < maxTime) { 
        try {
            if (checker.getAsBoolean())
                return true;
        }
        catch (Exception e) {
            LOG.error("exception");
        }
        currentTime = new Date().getTime();
    }

    return false;
}

public static boolean doSomething1() {
    return doSomethingHelper(() -> true);
}

public static boolean doSomething2() {
    return doSomethingHelper(() -> false);
}

public static boolean doSomething3() {
    return doSomethingHelper(() -> {
        System.out.println("test");
        return true;
    });
}