在Java8中是否可以向removeIf添加日志记录?
我正在使用Java8 以下代码工作正常:在Java8中是否可以向removeIf添加日志记录?,java,collections,java-8,java-stream,Java,Collections,Java 8,Java Stream,我正在使用Java8 以下代码工作正常: public void testMethod(List<String> prop1, EmailJson randomModel) { prop1.stream().forEach(s -> randomModel.getSomeList() .removeIf(model -> model.getSomeProp().equalsIgnoreCase(s))); } public void te
public void testMethod(List<String> prop1, EmailJson randomModel) {
prop1.stream().forEach(s -> randomModel.getSomeList()
.removeIf(model -> model.getSomeProp().equalsIgnoreCase(s)));
}
public void testMethod(列表prop1,EmailJson随机模型){
prop1.stream().forEach->randomModel.getSomeList()
.removeIf(model->model.getSomeProp().equalsIgnoreCase));
}
如果条件为真,是否可以记录消息
我正在寻找类似于:
public void testMethod(List<String> prop1, EmailJson randomModel) {
prop1.stream().forEach(s -> randomModel.getSomeList()
.removeIf(model -> model.getSomeProp().equalsIgnoreCase(s))
- > if this is true then log some action);
}
public void testMethod(列表prop1,EmailJson随机模型){
prop1.stream().forEach->randomModel.getSomeList()
.removeIf(model->model.getSomeProp().equalsIgnoreCase)
->如果这是真的,则记录一些操作);
}
您可以随时更换
removeIf(model -> model.getSomeProp().equalsIgnoreCase(s))
与
如果这是一个重复出现的问题,您可以创建一个助手方法,用另一个操作(例如,日志记录)概括修饰谓词的任务:
static <T> Predicate<T> logging(Predicate<T> p, BiConsumer<T,Boolean> log, boolean all) {
return t -> {
final boolean result = p.test(t);
if(all || result) log.accept(t, result);
return result;
};
}
编辑以反映“removeIf block”并非真正正确的事实
removeIf
是一个使用谓词的方法。我还包装了代码以避免水平滚动。希望没问题。
static <T> Predicate<T> logging(Predicate<T> p, BiConsumer<T,Boolean> log, boolean all) {
return t -> {
final boolean result = p.test(t);
if(all || result) log.accept(t, result);
return result;
};
}
public void testMethod(List<String> prop1, EmailJson randomModel){
prop1.forEach(s -> randomModel.getSomeList()
.removeIf(logging(model -> model.getSomeProp().equalsIgnoreCase(s),
(model,b) -> LOGGER.info(() -> "matched: "+model.getSomeProp()), false)));
}
public void testMethod(List<String> prop1, EmailJson randomModel){
prop1.stream().forEach(s -> {
if(randomModel.getSomeList()
.removeIf(model -> model.getSomeProp().equalsIgnoreCase(s)))
LOGGER.info(() -> "there were matches of: "+s);
});
}