ParameterWithMultipleAnnotationsTest.java

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package com.sun.jersey.server.impl.model.parameter;

import com.sun.jersey.api.model.Parameter;
import com.sun.jersey.server.impl.modelapi.annotation.IntrospectionModeller;
import org.junit.Test;

import javax.ws.rs.PathParam;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.List;

import static org.junit.Assert.*;

/**
 * Checks that Parameters work fine with multiple annotations
 */
public class ParameterWithMultipleAnnotationsTest {

    @Test
    public void testParametersWithMultiple() throws Exception {
        Class<?> declaring = MyResource.class;
        Method processMethod = declaring.getMethod("process", String.class);

        // its a private method so lets use reflection to invoke it
        Method createParameterMethod = null;
        Method[] methods = IntrospectionModeller.class.getDeclaredMethods();
        for (Method method : methods) {
            if (method.getName().equals("createParameter")) {
                createParameterMethod = method;
            }
        }
        assertNotNull("Should have found the createParameter() method on IntrospectionModeller", createParameterMethod);

        /*
            private static Parameter createParameter(
            Class concreteClass,
            Class declaringClass,
            boolean isEncoded,
            Class<?> paramClass,
            Type paramType,
            Annotation[] annotations) {
         */
        boolean isEncoded = false;
        Class<?>[] parameterTypes = processMethod.getParameterTypes();
        Annotation[][] parameterAnnotations = processMethod.getParameterAnnotations();
        int idx = 0;
        createParameterMethod.setAccessible(true);
        Object value = createParameterMethod.invoke(null, declaring, declaring, isEncoded, String.class, parameterTypes[idx], parameterAnnotations[idx]);
        assertTrue("Should return a Parameter but found " + value, value instanceof Parameter);
        Parameter parameter = (Parameter) value;
        assertEquals("id", parameter.getSourceName());
    }

    @java.lang.annotation.Target({java.lang.annotation.ElementType.PARAMETER, java.lang.annotation.ElementType.METHOD, java.lang.annotation.ElementType.FIELD})
    @java.lang.annotation.Retention(java.lang.annotation.RetentionPolicy.RUNTIME)
    public @interface DummyAnnotation {
    }

    private static class MyResource {
        public void process(@PathParam("id") @DummyAnnotation String id) {

        }
    }
}