JsonValueExtTypeIdTest.java

package com.fasterxml.jackson.databind.jsontype.ext;

import java.io.*;
import java.math.BigDecimal;
import java.util.*;

import org.junit.jupiter.api.Test;

import com.fasterxml.jackson.annotation.*;

import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.testutil.DatabindTestUtil;

import static org.junit.jupiter.api.Assertions.assertEquals;

@SuppressWarnings("serial")
public class JsonValueExtTypeIdTest extends DatabindTestUtil
{
    // The following is required for the testDecimalMetadata test case. That case fails.
    @JsonTypeName(value = "decimalValue")
    public static class DecimalValue {
        private BigDecimal value;
        public DecimalValue() { value = new BigDecimal("111.1"); }

        @JsonValue
        public BigDecimal getValue(){ return value; }
    }

    @JsonPropertyOrder({"key","value"})
    public static class DecimalEntry {
    public DecimalEntry() {}
        public String getKey() { return "num"; }

        @JsonTypeInfo(use=JsonTypeInfo.Id.NAME, include=JsonTypeInfo.As.EXTERNAL_PROPERTY)
        public DecimalValue getValue(){
            return new DecimalValue();
        }
    }

    public static class DecimalMetadata {
        @JsonProperty("metadata")
        public List<DecimalEntry> getMetadata() {
            return new ArrayList<DecimalEntry>() { {add(new DecimalEntry());} };
        }
    }

    // The following succeeds. It's included for comparison
    @JsonTypeName(value = "doubleValue")
    public static class DoubleValue {
        private Double value;
        public DoubleValue() { value = 1234.25; }

        @JsonValue
        public Double getValue() { return value; }
    }

    @JsonPropertyOrder({"key","value"})
    public static class DoubleEntry {
        public DoubleEntry(){}
        public String getKey(){ return "num"; }

        @JsonTypeInfo(use=JsonTypeInfo.Id.NAME, include=JsonTypeInfo.As.EXTERNAL_PROPERTY)
        public DoubleValue getValue(){ return new DoubleValue(); }
    }

    public static class DoubleMetadata {
        @JsonProperty("metadata")
        public List<DoubleEntry> getMetadata() {
            return new ArrayList<DoubleEntry>() { {add(new DoubleEntry());} };
        }
    }

    final ObjectMapper MAPPER = new ObjectMapper();

    @Test
    public void testDoubleMetadata() throws IOException {
        DoubleMetadata doub = new DoubleMetadata();
        String expected = "{\"metadata\":[{\"key\":\"num\",\"value\":1234.25,\"@type\":\"doubleValue\"}]}";
        String json = MAPPER.writeValueAsString(doub);
        assertEquals(expected, json, "Serialized json not equivalent");
    }

    @Test
    public void testDecimalMetadata() throws IOException{
        DecimalMetadata dec = new DecimalMetadata();
        String expected = "{\"metadata\":[{\"key\":\"num\",\"value\":111.1,\"@type\":\"decimalValue\"}]}";
        String json = MAPPER.writeValueAsString(dec);
        assertEquals(expected, json, "Serialized json not equivalent");
    }
}