server/runtime/org.argeo.server.json/src/main/java/org/argeo/server/json/JsonServerMapper.java

   1 package org.argeo.server.json;
   2
   3 import java.io.IOException;
   4 import java.io.Reader;
   5 import java.io.StringReader;
   6 import java.util.HashMap;
   7 import java.util.Map;
   8
   9 import org.apache.commons.io.IOUtils;
  10 import org.apache.commons.logging.Log;
  11 import org.apache.commons.logging.LogFactory;
  12 import org.argeo.server.ArgeoServerException;
  13 import org.argeo.server.ServerDeserializer;
  14 import org.codehaus.jackson.JsonProcessingException;
  15 import org.codehaus.jackson.map.DeserializationContext;
  16 import org.codehaus.jackson.map.DeserializationProblemHandler;
  17 import org.codehaus.jackson.map.JsonDeserializer;
  18 import org.codehaus.jackson.map.deser.CustomDeserializerFactory;
  19 import org.codehaus.jackson.map.deser.StdDeserializerProvider;
  20 import org.springframework.beans.factory.InitializingBean;
  21
  22 public class JsonServerMapper extends JsonServerSerializer implements
  23                 ServerDeserializer, InitializingBean {
  24         private final static Log log = LogFactory.getLog(JsonServerMapper.class);
  25
  26         private Class<?> targetClass;
  27
  28         private Map<Class<?>, JsonDeserializer<?>> deserializers = new HashMap<Class<?>, JsonDeserializer<?>>();
  29
  30         @SuppressWarnings("unchecked")
  31         public void afterPropertiesSet() throws Exception {
  32                 CustomDeserializerFactory dsf = new CustomDeserializerFactory();
  33                 for (Class clss : deserializers.keySet()) {
  34                         dsf.addSpecificMapping(clss, deserializers.get(clss));
  35                 }
  36                 StdDeserializerProvider sdp = new StdDeserializerProvider(dsf);
  37                 getObjectMapper().setDeserializerProvider(sdp);
  38                 // ignore unkown properties
  39                 getObjectMapper().getDeserializationConfig().addHandler(
  40                                 new DeserializationProblemHandler() {
  41                                         public boolean handleUnknownProperty(
  42                                                         DeserializationContext ctxt,
  43                                                         JsonDeserializer<?> deserializer, Object bean,
  44                                                         String propertyName) throws IOException,
  45                                                         JsonProcessingException {
  46                                                 if (log.isTraceEnabled())
  47                                                         log.debug("Ignore property " + propertyName);
  48                                                 ctxt.getParser().skipChildren();
  49                                                 return true;
  50                                         }
  51                                 });
  52         }
  53
  54         public Object deserialize(Reader reader) {
  55                 try {
  56                         // String body = request.getParameter("body");
  57                         // if (body == null) {
  58                         // // lets read the message body instead
  59                         // BufferedReader reader = request.getReader();
  60                         // StringBuffer buffer = new StringBuffer();
  61                         // String line = null;
  62                         // while (((line = reader.readLine()) != null)) {
  63                         // buffer.append(line);
  64                         // }
  65                         // body = buffer.toString();
  66                         // }
  67                         return getObjectMapper().readValue(reader, targetClass);
  68                 } catch (Exception e) {
  69                         throw new ArgeoServerException("Cannot deserialize " + reader, e);
  70                 }
  71
  72         }
  73
  74         public Object deserialize(String content) {
  75                 StringReader reader = new StringReader(content);
  76                 try {
  77                         return deserialize(reader);
  78                 } finally {
  79                         IOUtils.closeQuietly(reader);
  80                 }
  81         }
  82
  83         public void setTargetClass(Class<?> targetClass) {
  84                 this.targetClass = targetClass;
  85         }
  86
  87         public void setDeserializers(Map<Class<?>, JsonDeserializer<?>> deserializers) {
  88                 this.deserializers = deserializers;
  89         }
  90
  91         public Class<?> getTargetClass() {
  92                 return targetClass;
  93         }
  94
  95         public Map<Class<?>, JsonDeserializer<?>> getDeserializers() {
  96                 return deserializers;
  97         }
  98
  99 }