how to get class name from String

Question

I am using spring batch in that I am passing class name as parameter to reader in that I want set that as my target class name.is there a way that we can get class name from a String.I tried with using reflection in that I am getting that class successfully.but I not able to set as my target type class below is my code.

@Bean(name = "jMongoReader")
@StepScope
public MongoItemReader<Object> jsonDataReader(@Value("#{jobParameters[name]}") String className) {

    try {

        Class cls= Class.forName(className);
        reader.setTemplate(mongoConfig.getMongoTemplate());
        reader.setCollection("employeeInfo");
        reader.setTargetType((Class<? extends className>) className.class);
        reader.setQuery("{}");
        Map<String, Direction> sorts = new HashMap<String, Sort.Direction>(1);
        sorts.put("_id", Sort.Direction.ASC);
        reader.setSort(sorts);
        reader.setFields(keys);
}

className.class is always String in your case

Alex Salauyou
– Alex Salauyou

2015-10-21 09:57:27 +00:00
Commented Oct 21, 2015 at 9:57 — Alex Salauyou
– Alex Salauyou, Commented Oct 21, 2015 at 9:57

Gaël J · Accepted Answer · 2015-10-21 09:56:04Z

1

You made a mistake on this line :

reader.setTargetType((Class<? extends className>) className.class);

It should be :

reader.setTargetType(cls);

answered Oct 21, 2015 at 9:56

Gaël J

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1 Comment

Gaël J Over a year ago

By the way, you cannot do Class<? extends className> with className a variable. You can do it only if it was a type.

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