1.9.10/src/test/org/codehaus/jackson/jaxb/TestDeserializerCaching.java

package org.codehaus.jackson.jaxb;

import org.codehaus.jackson.*;
import org.codehaus.jackson.map.*;
import org.codehaus.jackson.map.deser.BeanDeserializer;
import org.codehaus.jackson.map.deser.BeanDeserializerModifier;
import org.codehaus.jackson.map.introspect.BasicBeanDescription;
import org.codehaus.jackson.xc.JaxbAnnotationIntrospector;

/**
 * Unit test(s) for [JACKSON-472]
 */
public class TestDeserializerCaching extends BaseJaxbTest
{
    /*
    /**********************************************************
    /* Helper beans
    /**********************************************************
     */

    static class MyBeanModule extends Module {
        @Override public String getModuleName() {
            return "MyBeanModule";
        }

        @Override public Version version() {
            return new Version(1,0,0, null);
        }

        @Override public void setupModule(SetupContext context) {
            context.addBeanDeserializerModifier(new MyBeanDeserializerModifier());
        }
    }

    static class MyBeanDeserializer extends BeanDeserializer {
        public MyBeanDeserializer(BeanDeserializer src) {
            super(src);
        }
    }

    static class MyBean {
        public MyType value1;
        public MyType value2;
        public MyType value3;
    }

    static class MyType {
        public String name;
        public String value;
    }
    
    static class MyBeanDeserializerModifier extends BeanDeserializerModifier
    {
        static int count = 0;

        @Override
        public JsonDeserializer<?> modifyDeserializer(DeserializationConfig config,
                BasicBeanDescription beanDesc, JsonDeserializer<?> deserializer)
        {
            if (MyType.class.isAssignableFrom(beanDesc.getBeanClass())) {
                count++;
                return new MyBeanDeserializer((BeanDeserializer)deserializer);
            }
            return super.modifyDeserializer(config, beanDesc, deserializer);
        }
    }

    /*
    /**********************************************************
    /* Unit tests
    /**********************************************************
     */

    public void testCaching() throws Exception
    {
        final String JSON = "{\"value1\" : {\"name\" : \"fruit\", \"value\" : \"apple\"},\n"
            +"\"value2\" : {\"name\" : \"color\", \"value\" : \"red\"},\n"
            +"\"value3\" : {\"name\" : \"size\", \"value\" : \"small\"}}"
            ;
        ObjectMapper mapper = new ObjectMapper();
        mapper.setAnnotationIntrospector(new JaxbAnnotationIntrospector());
        mapper.registerModule(new MyBeanModule());
        mapper.readValue(JSON, MyBean.class);
        assertEquals(1, MyBeanDeserializerModifier.count);
    }
}