content: package com.alibaba.fastjson2.issues;
  
  import com.alibaba.fastjson2.JSON;
  import com.alibaba.fastjson2.JSONFactory;
  import com.alibaba.fastjson2.JSONReader;
  import com.alibaba.fastjson2.reader.ObjectReader;
  import com.alibaba.fastjson2.reader.ObjectReaderProvider;
  import org.junit.jupiter.api.Test;
  
  import java.lang.reflect.Type;
  import java.math.BigDecimal;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class Issue940 {
      @Test
      public void test() {
          String json = "{\"data\":\"1.111\"}";
          InstantReader.INSTANCE.count.set(0);
          ObjectReaderProvider provider = new ObjectReaderProvider();
          provider.register(BigDecimal.class, InstantReader.INSTANCE);
          Bean bean = JSON.parseObject(json, Bean.class, JSONFactory.createReadContext(provider));
          assertEquals(new BigDecimal("1.111"), bean.data);
          assertEquals(1, InstantReader.INSTANCE.count.get());
      }
  
      static class InstantReader
              implements ObjectReader<BigDecimal> {
          static final InstantReader INSTANCE = new InstantReader();
  
          AtomicInteger count = new AtomicInteger();
  
          @Override
          public BigDecimal readObject(JSONReader jsonReader, Type fieldType, Object fieldName, long features) {
              if (jsonReader.nextIfNull()) {
                  return null;
              }
              count.incrementAndGet();
              return jsonReader.readBigDecimal();
          }
      }
  
      static class Bean {
          BigDecimal data;
  
          public BigDecimal getData() {
              return data;
          }
  
          public void setData(BigDecimal data) {
              this.data = data;
          }
  
          @Override
          public String toString() {
              return "TestJsonObj{" +
                      "data=" + data +
                      '}';
          }
      }
  
      @Test
      public void test1() {
          String json = "{\"data\":\"1.111\"}";
          InstantReader.INSTANCE.count.set(0);
          ObjectReaderProvider provider = new ObjectReaderProvider();
          provider.register(BigDecimal.class, InstantReader.INSTANCE);
          Bean1 bean = JSON.parseObject(json, Bean1.class, JSONFactory.createReadContext(provider));
          assertEquals(new BigDecimal("1.111"), bean.data);
          assertEquals(1, InstantReader.INSTANCE.count.get());
      }
  
      public static class Bean1 {
          public BigDecimal data;
      }
  
      @Test
      public void test2() {
          String json = "{\"data\":\"1.111\"}";
          InstantReader.INSTANCE.count.set(0);
          ObjectReaderProvider provider = new ObjectReaderProvider();
          provider.register(BigDecimal.class, InstantReader.INSTANCE);
          Bean2 bean = JSON.parseObject(json, Bean2.class, JSONFactory.createReadContext(provider));
          assertEquals(new BigDecimal("1.111"), bean.data);
          assertEquals(1, InstantReader.INSTANCE.count.get());
      }
  
      private static class Bean2 {
          private final BigDecimal data;
  
          public Bean2(BigDecimal data) {
              this.data = data;
          }
      }
  }
  