Persistent Property of type Map throws UnrecognizedPropertyException [DATAREST-178]

Petar Tahchiev opened DATAREST-178 and commented

Hi guys,

I have the following JPA mapping:

@Entity
public class Product {

    @ElementCollection(fetch = FetchType.LAZY)
    @CollectionTable(name = "product_name_lv", joinColumns = @JoinColumn(name = "product_pk"))
    @MapKeyColumn(name = "locale")
    @MapKeyJoinColumn(name = "language", referencedColumnName = "isocode")
    private Map<Locale, LocalizedValue> name = new HashMap<Locale, LocalizedValue>();

}

where the LocalizedValue is a simple POJO class:

@Embeddable
public class LocalizedValue {
    @Column(name = "VALUE")
    private String value;
}

So SDR works good and returns my product, like a normal json:

"name" : {
  "bg" : {
    "value" : "FOO"
  },
  "en" : {
    "value" : "BAR"
  },
  "de" : {
    "value" : "German FOO"
  }
},

So far so good I try to make a PUT request with the same json data, it yields with:

2013-10-19 13:05:57,726 [qtp508751118-134] ERROR: Could not read JSON: Unrecognized field "en" (class com.xxxxxx.platform.core.model.i18n.LocalizedValue), not marked as ignorable (one known property: "value"])
 at [Source: org.eclipse.jetty.server.HttpInput@63497f5b; line: 1, column: 30] (through reference chain: com.xxxxx.platform.core.model.i18n.LocalizedValue["en"]); nested exception is com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "en" (class com.xxxxxx.platform.core.model.i18n.LocalizedValue), not marked as ignorable (one known property: "value"])
 at [Source: org.eclipse.jetty.server.HttpInput@63497f5b; line: 1, column: 30] (through reference chain: com.xxxxx.platform.core.model.i18n.LocalizedValue["en"])
org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Unrecognized field "en" (class com.xxxxxx.platform.core.model.i18n.LocalizedValue), not marked as ignorable (one known property: "value"])
 at [Source: org.eclipse.jetty.server.HttpInput@63497f5b; line: 1, column: 30] (through reference chain: com.xxxxxx.platform.core.model.i18n.LocalizedValue["en"]); nested exception is com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "en" (class com.xxxxxx.platform.core.model.i18n.LocalizedValue), not marked as ignorable (one known property: "value"])
 at [Source: org.eclipse.jetty.server.HttpInput@63497f5b; line: 1, column: 30] (through reference chain: com.xxxxxx.platform.core.model.i18n.LocalizedValue["en"])
	at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.readJavaType(MappingJackson2HttpMessageConverter.java:181)
	at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.readInternal(MappingJackson2HttpMessageConverter.java:166)
	at org.springframework.http.converter.AbstractHttpMessageConverter.read(AbstractHttpMessageConverter.java:153)
	at org.springframework.data.rest.webmvc.PersistentEntityResourceHandlerMethodArgumentResolver.resolveArgument(PersistentEntityResourceHandlerMethodArgumentResolver.java:48)
	at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:77)
	at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:162)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:123)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
	at org.springframework.web.servlet.FrameworkServlet.doPut(FrameworkServlet.java:849)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:758)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:686)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1494)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
	at org.apache.logging.log4j.core.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:66)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
	at com.xxxxxx.platform.modules.rest.mvc.filter.CorsFilter.doFilterInternal(CorsFilter.java:23)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1474)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:499)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:428)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
	at org.eclipse.jetty.server.Server.handle(Server.java:370)
	at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
	at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:960)
	at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1021)
	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865)
	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)
	at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:668)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
	at java.lang.Thread.run(Thread.java:722)

So I started digging in the code and I think the problem happens in PersistentEntityJackson2Module:197. I can see there an if-statement which checks if the property is of type map:

} else if (persistentProperty.isMap()) {
	Class<? extends Map<?, ?>> mtype = (Class<? extends Map<?, ?>>) persistentProperty.getType();
	Map<Object, Object> m = (Map<Object, Object>) wrapper.getProperty(persistentProperty);
	if (null == m || m == Collections.EMPTY_MAP) {
		m = new HashMap<Object, Object>();
	}

	if ((tok = jp.nextToken()) == JsonToken.START_OBJECT) {
		do {
			name = jp.getCurrentName();
			// TODO resolve domain object from URI
			tok = jp.nextToken();
			Object mval = jp.readValueAs(persistentProperty.getMapValueType()); //<-- this line reads as persistent property map value type.

			m.put(name, mval);
		} while ((tok = jp.nextToken()) != JsonToken.END_OBJECT);

		val = m;
	} else if (tok == JsonToken.VALUE_NULL) {
		val = null;
	} else {
		throw new HttpMessageNotReadableException("Cannot read a JSON " + tok + " as a Map.");
	}

So it basically gets the type of the persistent property, creates an empty map, iterates over the json, and reads the value of the original map (i.e. what will be placed after name: ) as the value of the persistent property map (LocalizedValue in my case). Which is wrong I think. It should read it as a map imho

Affects: 2.0 M1 (Codd)

1 votes, 3 watchers