java - Janino compile several classes -


i have tried janino , i'm able execute dynamic class, passing string janino compiler.

now, should create several classed dynamically, , import them dynamic class.

an example:

  • compile class string
  • compile class b string
  • create class c, putting inside "import mypackage.a; import mypackage.b; etc..."
  • compile class c

how achieve result?

my first dynamic class is:

package com.flink.pojo; public class rainpojo {     private string altitude;     private string city_name;     private string latitude;     private string longitude;     private string rainfall;     private string station_name;     private string time;      public string getaltitude() {         return altitude;     }      public void setaltitude(string altitude) {         this.altitude = altitude;     }     public string getcity_name() {         return city_name;     }     public void setcity_name(string city_name) {         this.city_name = city_name;     }     public string getlatitude() {         return latitude;     }     public void setlatitude(string latitude) {         this.latitude = latitude;     }     public string getlongitude() {         return longitude;     }     public void setlongitude(string longitude) {         this.longitude = longitude;     }     public string getrainfall() {         return rainfall;     }     public void setrainfall(string rainfall) {         this.rainfall = rainfall;     }     public string getstation_name() {         return station_name;     }     public void setstation_name(string station_name) {         this.station_name = station_name;     }     public string gettime() {         return time;     }     public void settime(string time) {         this.time = time;     } }

then have call class following class, generated dynamically:

import org.apache.flink.api.common.functions.mapfunction; import java.util.arraylist; import com.google.gson.jsonobject; import org.apache.flink.api.java.dataset; import org.apache.flink.api.java.executionenvironment; import org.apache.flink.api.java.tuple.tuple2; import org.apache.flink.api.common.operators.base.joinoperatorbase; import com.flink.pojo.rainpojo; public class flinkexecutor {     public flinkexecutor() {}     public static void main(string[] args) throws exception {         final executionenvironment env =  executionenvironment.getexecutionenvironment();         env.setdegreeofparallelism(1);          source rain = new source("sensor", "rain");         string path_rain = rain.getcsvpath();         dataset < rainpojo > ds_s1 = env.readcsvfile("file://" + path_rain)         .ignorefirstline()         .pojotype(rainpojo.class, "table", "time", "longitude", "latitude", "average_rainfall", "maximum_rainfall");         ds_s1.map(new maprain(ds_s1.count()))         .print();     } }

to compile first class have used:

simplecompiler compiler = new simplecompiler(); compiler.cook(p_class); classloader classloader = compiler.getclassloader();             try {     class<?> cl = classloader.loadclass("com.flink.pojo.rainpojo");          } catch (classnotfoundexception e1) {     e1.printstacktrace(); }

while second class, contains main method:

    simplecompiler compiler = new simplecompiler();      compiler.cook(this.allclass);     try {         class<?> cl = compiler.getclassloader().loadclass("flinkexecutor");          method mainmeth = cl.getmethod("main", new class[] { string[].class });          string[] methargs = new string[] { "" }; // 1 input          mainmeth.invoke(null, new object[] { methargs });      } catch (classnotfoundexception | nosuchmethodexception | securityexception | illegalaccessexception | illegalargumentexception e) {         e.printstacktrace();     }

the error is:
org.codehaus.commons.compiler.compileexception: line 8, column 7: class 'com.flink.pojo.rainpojo' not found

janino can't find class import declaration.

thank you, giacomo


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