src/test/java/com/fasterxml/jackson/failing/JDKNumberDeser2644Test.java

package com.fasterxml.jackson.failing;

import java.math.BigDecimal;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonSubTypes;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.databind.*;

public class JDKNumberDeser2644Test extends BaseMapTest
{
    // [databind#2644]
    static class NodeRoot2644 {
        public String type;

        @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXTERNAL_PROPERTY, property = "type")
        @JsonSubTypes(value = {
                @JsonSubTypes.Type(value = NodeParent2644.class, name = "NodeParent")
        })
        public Node2644 node;
    }

    public static class NodeParent2644 extends Node2644 { }

    public static abstract class Node2644 {
        @JsonProperty("amount")
        BigDecimal val;

        public BigDecimal getVal() {
            return val;
        }

        public void setVal(BigDecimal val) {
            this.val = val;
        }
    }

    // [databind#2644]
    public void testBigDecimalSubtypes() throws Exception
    {
        ObjectMapper mapper = newJsonMapper();
        mapper.enable(DeserializationFeature.USE_BIG_DECIMAL_FOR_FLOATS);
        mapper.registerSubtypes(NodeParent2644.class);

        NodeRoot2644 root = mapper.readValue(
                "{\"type\": \"NodeParent\",\"node\": {\"amount\": 9999999999999999.99} }",
                NodeRoot2644.class
        );

        assertEquals(new BigDecimal("9999999999999999.99"), root.node.getVal());

    }

}