Apply Jackson workaround for issue #1964

Jackson versions newer than 2.9.2 and older than 2.9.6 have problems with serializing static types: FasterXML/jackson-databind#1964 Until v2.9.6 become available we have to live with this workaround described here https://github.com/FasterXML/jackson- databind/issues/1964#issuecomment-382877148
ridoo · May 30, 2018 · 93e3f12 · 93e3f12
1 parent 116f4b1
commit 93e3f12
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diff --git a/spi/src/main/java/org/n52/io/response/dataset/Data.java b/spi/src/main/java/org/n52/io/response/dataset/Data.java
@@ -36,6 +36,7 @@
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 
 public class Data<T extends AbstractValue<?>> implements Serializable {
 
@@ -58,6 +59,9 @@ public void setValues(T[] values) {
     /**
      * @return a sorted list of quantity values.
      */
+    // TODO @JsonSerialize may not be needed anymore from jackson 2.9.6
+    // https://github.com/FasterXML/jackson-databind/issues/1964#issuecomment-382877148
+    @JsonSerialize(typing = JsonSerialize.Typing.STATIC)
     public List<T> getValues() {
         return Collections.unmodifiableList(this.values);
     }

diff --git a/spi/src/main/java/org/n52/io/response/dataset/DatasetOutput.java b/spi/src/main/java/org/n52/io/response/dataset/DatasetOutput.java
@@ -35,6 +35,7 @@
 import org.n52.io.response.ParameterOutput;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 
 public class DatasetOutput<V extends AbstractValue< ? >> extends ParameterOutput {
 
@@ -117,6 +118,9 @@ public DatasetOutput<V> setUom(OptionalOutput<String> uom) {
         return this;
     }
 
+    // TODO @JsonSerialize may not be needed anymore from jackson 2.9.6
+    // https://github.com/FasterXML/jackson-databind/issues/1964#issuecomment-382877148
+    @JsonSerialize(typing = JsonSerialize.Typing.STATIC)
     public V getFirstValue() {
         return getIfSerialized(firstValue);
     }
@@ -126,6 +130,9 @@ public DatasetOutput<V> setFirstValue(OptionalOutput<V> firstValue) {
         return this;
     }
 
+    // TODO @JsonSerialize may not be needed anymore from jackson 2.9.6
+    // https://github.com/FasterXML/jackson-databind/issues/1964#issuecomment-382877148
+    @JsonSerialize(typing = JsonSerialize.Typing.STATIC)
     public V getLastValue() {
         return getIfSerialized(lastValue);
     }