I want to check annotation value

SonarQube Writing rules
1

hi, i write a custom rule for java.

i want to check annotation’s value.

For example,

my java source like that

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.persistence.Entity;

@RequestMapping(value = "/pjtname/v1")
@Controller
public class HelloController {

  @Entity
  public class Order {
    String ordered;
  }

  public class Client {
    String cliendId;
  }
}

and i want check
that value of annotation @RequestMapping (in my source code “/pjtname/v1” )
contains the word “v1” .

i show below examples but i don’t know how to check it.

this is my source code for this rule.
i don’t know hot to get String value of “/pjtname/v1” (annoatation value) .

 for (SymbolMetadata.AnnotationInstance annotation : tree.symbol().metadata().annotations()){
    	  String aname = annotation.symbol().name();
          if (annotation.symbol().name().equals(name)) {
              List<SymbolMetadata.AnnotationValue> valuesForAnnotations = tree.symbol().metadata().valuesForAnnotation("org.springframework.web.bind.annotation.RequestMapping");
              for( SymbolMetadata.AnnotationValue valuesForAnnotation :valuesForAnnotations ) {
            	              	  
            	  if(valuesForAnnotation.name().equals("value") ) {
            		  
            		  Object value = valuesForAnnotation.value();
            	      // i don't know how to get Sting type .
            	        

            	  }
              } 
          }
      }

plese your advice for it. thank you!