Rename field using mixin or naming-strategy

JsonTest.java

package xyz.faber;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.PropertyNamingStrategy;
import com.fasterxml.jackson.databind.cfg.MapperConfig;
import com.fasterxml.jackson.databind.introspect.AnnotatedField;
import com.fasterxml.jackson.databind.introspect.AnnotatedMethod;
import com.fasterxml.jackson.databind.introspect.AnnotatedParameter;
import org.junit.Test;

import java.io.IOException;
import java.io.StringWriter;

public class JsonTest {
    @Test
    public void testWithMixin() throws IOException {
        ObjectMapper mapper = new ObjectMapper();
        mapper.addMixIn(CustomClass.class, CustomClassMixin.class);
        CustomClass cc = new CustomClass("id", 7);
        StringWriter sw = new StringWriter();
        mapper.writeValue(sw, cc);
        System.out.println(sw.toString());
    }

    @Test
    public void testWithNamingStrategy() throws IOException {
        ObjectMapper mapper = new ObjectMapper();
        mapper.setPropertyNamingStrategy(new IdNamingStrategy("s_id"));
        CustomClass cc = new CustomClass("id", 7);
        StringWriter sw = new StringWriter();
        mapper.writeValue(sw, cc);
        System.out.println(sw.toString());
    }

    private static class CustomClassMixin {
        @JsonProperty("s_id")
        private String id;
    }

    private static class CustomClass {
        private String id;
        private int foo;

        public CustomClass() {
        }

        public CustomClass(String id, int foo) {
            this.id = id;
            this.foo = foo;
        }

        public String getId() {
            return id;
        }

        public void setId(String id) {
            this.id = id;
        }

        public int getFoo() {
            return foo;
        }

        public void setFoo(int foo) {
            this.foo = foo;
        }
    }

    public static class IdNamingStrategy extends PropertyNamingStrategy {
        private final PropertyNamingStrategy inner;
        private final String newIdPropertyName;

        public IdNamingStrategy(String newIdPropertyName) {
            this(PropertyNamingStrategy.LOWER_CAMEL_CASE, newIdPropertyName);
        }

        public IdNamingStrategy(PropertyNamingStrategy inner, String newIdPropertyName) {
            this.inner = inner;
            this.newIdPropertyName = newIdPropertyName;
        }

        private String translate(String propertyName) {
            if ("id".equals(propertyName)) {
                return newIdPropertyName;
            } else {
                return propertyName;
            }
        }

        @Override
        public String nameForField(MapperConfig<?> config, AnnotatedField field, String defaultName) {
            return inner.nameForField(config, field, translate(defaultName));
        }

        @Override
        public String nameForGetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) {
            return inner.nameForGetterMethod(config, method, translate(defaultName));
        }

        @Override
        public String nameForSetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) {
            return inner.nameForSetterMethod(config, method, translate(defaultName));
        }

        @Override
        public String nameForConstructorParameter(MapperConfig<?> config, AnnotatedParameter ctorParam, String defaultName) {
            return inner.nameForConstructorParameter(config, ctorParam, translate(defaultName));
        }
    }
}