//返回结果 [1, 2]

[alibaba]

//返回结果 [1, 2]

[baoxingjie]

package com.ql.util.express.test;

import com.ql.util.express.DefaultContext;
import com.ql.util.express.ExpressRunner;
import com.ql.util.express.Operator;
import org.junit.Test;

public class JoinOperatorTest {

public class JoinOperator extends Operator {
    public Object executeInner(Object[] list) throws Exception {
        java.util.List result = new java.util.ArrayList();
        Object opdata1 = list[0];
        if(opdata1 instanceof java.util.List){
            result.addAll((java.util.List)opdata1);
        }else{
            result.add(opdata1);
        }
        for(int i=1;i<list.length;i++){
            result.add(list[i]);
        }
        return result;
    }
}

@Test
public void test() throws Exception {
    ExpressRunner runner = new ExpressRunner();
    DefaultContext<String, Object> context = new DefaultContext<String, Object>();
    runner.addFunction("join",new JoinOperator());
    Object r = runner.execute("join(1,2,3)", context, null, false, false);
    System.out.println(r);
}

}
console output:
//[1, 2, 3]

[baoxingjie]

it really works!