我有两个定义如下的POJO:
public class VertexDefinition {
private final String name;
private final Vertex vertex;
public VertexDefinition(String name, Vertex vertex) {
this.name = name;
this.vertex = vertex;
}
@JsonProperty("name")
public String getName() {
return name;
}
@JsonProperty("properties")
public Iterable<PropertyDefinition> getProperties() {
if(vertex == null) {
return Collections.emptySet();
}
return Iterables.transform(vertex.getPropertyKeys(), new Function<String, PropertyDefinition>() {
@Nullable @Override public PropertyDefinition apply(@Nullable String s) {
return new PropertyDefinition(vertex, s);
}
});
}
@JsonProperty("propertyKeys")
public Iterable<String> getPropertyKeys() {
if (vertex == null) {
return Collections.emptySet();
}
return vertex.getPropertyKeys();
}
}
public class PropertyDefinition {
private final Vertex vertex;
private final String propertyName;
public PropertyDefinition(Vertex vertex, String propertyName) {
this.vertex = vertex;
this.propertyName = propertyName;
}
@JsonProperty("name")
public String getName() {
return propertyName;
}
@JsonProperty("type")
public String getType() {
final Object property = vertex.getProperty(propertyName);
if (property != null) {
return property.getClass().getTypeName();
}
return "(unknown)";
}
}
我的Rest方法如下所示:
public Iterable<VertexDefinition> getSchema() {
.....
}
当我发出请求时,我得到一个json响应,如下所示:
[
{
"name" : "Foo",
"properties" : [],
"propertyKeys" : [
"a",
"b",
"c"
]
},
{
"name" : "Bar",
"properties" : [],
"propertyKeys" : [
"a",
"b",
"c"
]
}
]
简而言之,当填充propertyKeys时,我得到一个返回的空数组,用于属性。
我究竟做错了什么?
最佳答案
我不认为您尝试过将反序列化为可迭代的作品。您可以在getProperties
方法中尝试类似的方法吗?
List<PropertyDefinition> propertyDefinitions = Arrays.asList(mapper.readValue(json, PropertyDefinition[].class))