Question

我正在使用java-object-diff https://github.com/SQiShER/java-object-diff并尝试比较实现相同接口的两个对象。作为一个例子，我用苹果和橘子设置了一个测试。我知道你不应该比较苹果和橘子，但我有一些用例，我需要这样做。

我尝试过施法。我也尝试用一个抽象的超级类Apple实现它，Apple和Apple类扩展它。没有骰子。我一直在寻找API文档和测试类中的一种方法，但到目前为止还没有运气。任何熟悉这个API的人都可以指出我的方向很好。

以下是代码：

public interface Fruit {

    public final static String SIZE_SMALL = "Small";
    public final static String SIZE_LARGE = "Large";
    public final static String CONDITION_RIPE = "Ripe";
    public final static String CONDITION_NOT_RIPE = "Not Ripe";

    public String getSize();
    public String getCondition();
    public Double getWeight();
    public Date getSellBy();
}

public class Apple implements Fruit {

    private String size;
    private String condition;
    private Double weight;
    private Date sellBy;

    public Apple (String size, String condition, Double weight, Date sellBy){
        this.size= size;
        this.condition = condition;
        this.weight = weight;
        this.sellBy = sellBy;
    }

    public String getSize() {
        return size;
    }
    public void setSize(String size) {
        this.size= size;
    }

    public String getCondition() {
        return condition;
    }
    public void setCondition(String condition) {
        condition = condition;
    }

    public Double getWeight() {
        return weight;
    }
    public void setWeight(Double weight) {
        this.weight = weight;
    }

    public Date getSellBy() {
        return sellBy;
    }
    public void setSellBy(Date sellBy) {
        this.sellBy = sellBy;
    }

}

public class Orange implements Fruit {

    private String size;
    private String condition;
    private Double weight;
    private Date sellBy;

    public Orange (String size, String condition, Double weight, Date sellBy){
        this.size = size;
        this.condition = condition;
        this.weight = weight;
        this.sellBy = sellBy;
    }

    public String getSize() {
        return size;
    }
    public void setSize(String size) {
        this.size = size;
    }

    public String getCondition() {
        return condition;
    }
    public void setCondition(String condition) {
        condition = condition;
    }

    public Double getWeight() {
        return weight;
    }
    public void setWeight(Double weight) {
        this.weight = weight;
    }

    public Date getSellBy() {
        return sellBy;
    }
    public void setSellBy(Date sellBy) {
        this.sellBy = sellBy;
    }

}

以下是两个测试用例：

测试案例1

 @Test public void testCompareAppleAndOrangeIface() {
     Apple apple = new Apple(Fruit.SIZE_LARGE,Fruit.CONDITION_RIPE, 0.3, new Date());   //(String size, String condition, Double weight, Date sellBy)
     Orange orange = new Orange(Fruit.SIZE_SMALL,Fruit.CONDITION_RIPE, 0.2, new Date());

     DiffNode diff = ObjectDifferBuilder.buildDefault().compare(apple, orange);
     LOGGER.info("\n\nComparing apples and oranges IFace...");
     LOGGER.info("diff.hasChanges() " + diff.hasChanges());
     LOGGER.info("diff.childCount() " + diff.childCount());

     diff.visit(new DiffNode.Visitor()
     {
         public void node(DiffNode node, Visit visit)
         {
             final Object baseValue = node.canonicalGet(apple);
             final Object workingValue = node.canonicalGet(orange);
             final String message = node.getPath() + " changed from " + 
                     baseValue + " to " + workingValue;
             LOGGER.info(message);
         }
     });
 }

结果：

Comparing apples and oranges IFace...
[main] INFO xxx.compare.test.CompareTest - diff.hasChanges() true
[main] INFO xxx.compare.test.CompareTest - diff.childCount() 0
[main] INFO xxx.compare.test.CompareTest - / changed from xxx.compare.test.Apple@368102c8 to xxx.compare.test.Orange@6996db8
[main] INFO xxx.compare.test.CompareTest -

测试案例2

 @Test public void testCompareFruitIface() {
     LOGGER.info("\n\nComparing fruit Iface...");

     Fruit fruitApple = new Apple(Fruit.SIZE_LARGE,Fruit.CONDITION_RIPE, 0.3, new Date());  //(String size, String condition, Double weight, Date sellBy)
     Fruit fruitOrange  = new Orange(Fruit.SIZE_SMALL,Fruit.CONDITION_RIPE, 0.2, new Date());

     DiffNode diff = ObjectDifferBuilder.buildDefault().compare(fruitApple, fruitOrange);

     LOGGER.info("diff.hasChanges() " + diff.hasChanges());
     LOGGER.info("diff.childCount() " + diff.childCount());

     diff.visit(new DiffNode.Visitor()
     {
         public void node(DiffNode node, Visit visit)
         {
             // Also tried this with node.get(fruitApple), same results
             final Object baseValue = node.canonicalGet(fruitApple);
             final Object workingValue = node.canonicalGet(fruitOrange);
             final String message = node.getPath() + " changed from " + 
                     baseValue + " to " + workingValue;
             LOGGER.info(message);
         }
     });
 }

结果：

Comparing fruit Iface...
[main] INFO de.danielbechler.diff.access.Instances - Detected instances of different types [class xxx.compare.test.Apple, class xxx.compare.test.Orange]. These objects will only be compared via equals method.
[main] INFO de.danielbechler.diff.access.Instances - Detected instances of different types [class xxx.compare.test.Apple, class xxx.compare.test.Orange]. These objects will only be compared via equals method.
[main] INFO de.danielbechler.diff.access.Instances - Detected instances of different types [class xxx.compare.test.Apple, class xxx.compare.test.Orange]. These objects will only be compared via equals method.
[main] INFO de.danielbechler.diff.access.Instances - Detected instances of different types [class xxx.compare.test.Apple, class xxx.compare.test.Orange]. These objects will only be compared via equals method.
[main] INFO de.danielbechler.diff.access.Instances - Detected instances of different types [class xxx.compare.test.Apple, class xxx.compare.test.Orange]. These objects will only be compared via equals method.
[main] INFO xxx.compare.test.CompareTest - diff.hasChanges() true
[main] INFO xxx.compare.test.CompareTest - diff.childCount() 0
[main] INFO xxx.compare.test.CompareTest - / changed from xxx.compare.test.Apple@1963006a to xxx.compare.test.Orange@7fbe847c
[main] INFO xxx.compare.test.CompareTest -

如何将不同的对象类型与java-object-diff进行比较

0 个答案: