Add a (failing) test for #622

src/test/java/com/fasterxml/jackson/failing/JSOGDeserialize622Test.java

@@ -0,0 +1,135 @@
+package com.fasterxml.jackson.failing;
+
+import java.io.IOException;
+
+import com.fasterxml.jackson.annotation.JsonIdentityInfo;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.ObjectIdGenerator;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+
+import com.fasterxml.jackson.databind.*;
+
+public class JSOGDeserialize622Test extends BaseMapTest
+{
+  /** the key of the property that holds the ref */
+  public static final String REF_KEY = "@ref";
+
+  /**
+   * JSON input
+   */
+  private static final String EXP_EXAMPLE_JSOG =  aposToQuotes(
+          "{'@id':'1','foo':66,'next':{'@ref':'1'}}");
+
+  private final ObjectMapper mapper = new ObjectMapper();
+
+  /**
+   * Customer IdGenerator
+   */
+  static class JSOGGenerator extends ObjectIdGenerator<JSOGRef>  {
+
+    private static final long serialVersionUID = 1L;
+    protected transient int _nextValue;
+    protected final Class<?> _scope;
+
+    protected JSOGGenerator() { this(null, -1); }
+
+    protected JSOGGenerator(Class<?> scope, int nextValue) {
+        _scope = scope;
+        _nextValue = nextValue;
+    }
+
+    @Override
+    public Class<?> getScope() {
+        return _scope;
+    }
+
+    @Override
+    public boolean canUseFor(ObjectIdGenerator<?> gen) {
+        return (gen.getClass() == getClass()) && (gen.getScope() == _scope);
+    }
+
+    @Override
+    public ObjectIdGenerator<JSOGRef> forScope(Class<?> scope) {
+          return (_scope == scope) ? this : new JSOGGenerator(scope, _nextValue);
+    }
+
+    @Override
+    public ObjectIdGenerator<JSOGRef> newForSerialization(Object context) {
+          return new JSOGGenerator(_scope, 1);
+    }
+
+    @Override
+    public com.fasterxml.jackson.annotation.ObjectIdGenerator.IdKey key(Object key) {
+          return new IdKey(getClass(), _scope, key);
+    }
+
+    @Override
+    public JSOGRef generateId(Object forPojo) {
+          int id = _nextValue;
+          ++_nextValue;
+          return new JSOGRef(id);
+    }
+  }
+
+  /**
+   * The reference deserializer
+   */
+  static class JSOGRefDeserializer extends JsonDeserializer<JSOGRef>
+  {
+    @Override
+    public JSOGRef deserialize(JsonParser jp, DeserializationContext ctx) throws IOException, JsonProcessingException {
+      JsonNode node = jp.readValueAsTree();
+      return node.isTextual()
+              ? new JSOGRef(node.asInt()) : new JSOGRef(node.get(REF_KEY).asInt());
+    }
+  }
+
+  /**
+   * The reference object
+   */
+  @JsonDeserialize(using=JSOGRefDeserializer.class)
+  static class JSOGRef
+  {
+    @JsonProperty(REF_KEY)
+    public int ref;
+
+    public JSOGRef() { }
+
+    public JSOGRef(int val) {
+      ref = val;
+    }
+  }
+
+
+  /**
+   * Example class using JSOGGenerator
+   */
+  @JsonIdentityInfo(generator=JSOGGenerator.class)
+  public static class IdentifiableExampleJSOG {
+    public int foo;
+    public IdentifiableExampleJSOG next;
+  }
+
+  /*
+  /**********************************************************************
+  /* Test methods
+  /**********************************************************************
+   */
+
+  // for [databind#622]
+  public void testStructJSOGRef() throws Exception {
+
+    // Because the value ({@ref:1}) is not scalar, parser thinks it is not an id 
+    // and tries to deserialize as normal a new IdentifiableExampleJSOG 
+    // then  complains about unrecognized field "@ref"
+    IdentifiableExampleJSOG result = mapper.readValue(EXP_EXAMPLE_JSOG,
+            IdentifiableExampleJSOG.class);
+
+    assertEquals(66, result.foo);
+    assertSame(result, result.next);
+  }
+}