I get an error:
Exception in thread "main" org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Can not deserialize instance of com.zee.FilterVO out of START_ARRAY token. at [Source: sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@1b54 362; line: 1, column: 1]; nested exception is org.codehaus.jackson.map.JsonMappingException: : Can not deserialize instance of com.zee.FilterVO out of START_ARRAY token
Java call to get JSON:
ResponseEntity<FilterVO> responseEntity = restTemplate.exchange(url, HttpMethod.GET, entity, FilterVO.class);
Java Bean to display JSON:
public class FilterVO { private String userName; private String expirationTime; private String lastMatchedTime; private String state; private Integer matchedTodayCount; private Boolean useRegEx; private List<String> matchStrings; private List<String> hosts; private String activationTime; private String objectId; private String description; public Map<String, String> nameValuePairs; getters and setters.... }
JSON, what can I get:
[{ "userName": "Z111111", "expirationTime": "2015-03-15T14:00:00.000-0400", "activationTime": "1969-12-31T19:00:00.000-0500", "hosts": ["aa", "bb"], "matchStrings": [" aa is not running", " bb is not running"], "useRegEx": false, "nameValuePairs": { "KEY VALUE": "asasa", "PROGRAM": "dsds", "REGION": "dfsffs" }, "objectId": "SOMEID:20141015140803579-802", "matchedTodayCount": 190, "lastMatchedTime": "2015-03-09T07:53:20.366-0400", "state": "ACTIVE", "description": "Blah Blah Blah..." }]
Initially, I thought I ran into this problem due to deserialization of a single Array element. So I changed the Java code.
private void getFilter() { RestTemplate restTemplate = getCustomRestTemplate(); HttpHeaders headers = new HttpHeaders(); headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON)); headers.set("access-token", getAccessToken()); HttpEntity<String> entity = new HttpEntity<String>("parameters", headers); ResponseEntity<FilterVO> responseEntity = restTemplate.exchange(uri, HttpMethod.GET, entity, FilterVO.class); } private RestTemplate getCustomRestTemplate() { ObjectMapper mapper = new ObjectMapper(); mapper.configure(DeserializationConfig.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true); MappingJacksonHttpMessageConverter messageConverter = new MappingJacksonHttpMessageConverter(); messageConverter.setObjectMapper(mapper); List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>(); messageConverters.add(messageConverter); RestTemplate restTemplate = new RestTemplate(); restTemplate.setMessageConverters(messageConverters); return restTemplate; }
However, I get the same error.
I have the following jackson jars in my classpath:
jackson-annotations-2.5.1.jar jackson-core-2.5.1.jar jackson-core-asl-1.9.13.jar jackson-databind-2.5.1.jar jackson-datatype-joda-2.5.1.jar jackson-mapper-asl-1.9.13.jar
Full STACK trace:
Exception in thread "main" org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Can not deserialize instance of com.zee.FilterVO out of START_ARRAY token at [Source: sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@bc55 96; line: 1, column: 1]; nested exception is org.codehaus.jackson.map.JsonMappingException: Can not deserialize instance of com.zee.FilterVO out of START_ARRAY token at [Source: sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@bc55 96; line: 1, column: 1] at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.readJavaType(MappingJacksonHttpMessageConverter.java:179) at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.read(MappingJacksonHttpMessageConverter.java:171) at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:94) at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:693) at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:679) at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:496) at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:465) at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:416) at com.fidelity.selfservice.test.JMagicRestAPI.getFilter(JMagicRestAPI.java:63) at com.fidelity.selfservice.test.JMagicRestAPI.main(JMagicRestAPI.java:46) Caused by: org.codehaus.jackson.map.JsonMappingException: Can not deserialize instance of com.zee.FilterVO out of START_ARRAY token at [Source: sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@bc55 96; line: 1, column: 1] at org.codehaus.jackson.map.JsonMappingException.from(JsonMappingException.java:163) at org.codehaus.jackson.map.deser.StdDeserializationContext.mappingException(StdDeserializationContext.java:219) at org.codehaus.jackson.map.deser.StdDeserializationContext.mappingException(StdDeserializationContext.java:212) at org.codehaus.jackson.map.deser.BeanDeserializer.deserializeFromArray(BeanDeserializer.java:875) at org.codehaus.jackson.map.deser.BeanDeserializer.deserialize(BeanDeserializer.java:597) at org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:2732) at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1923) at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.readJavaType(MappingJacksonHttpMessageConverter.java:176) ... 9 more