#919 - io.ebean package initial

src/main/java/io/ebeaninternal/server/deploy/BeanPropertyAssocManyJsonTransient.java

@@ -0,0 +1,44 @@
+package io.ebeaninternal.server.deploy;
+
+import io.ebean.bean.EntityBean;
+import io.ebeaninternal.server.text.json.ReadJson;
+import com.fasterxml.jackson.databind.JavaType;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.type.CollectionType;
+import com.fasterxml.jackson.databind.type.MapType;
+import com.fasterxml.jackson.databind.type.TypeFactory;
+
+import java.io.IOException;
+import java.util.LinkedHashMap;
+
+/**
+ * Helper used to read transient many properties using Jackson ObjectMapper.
+ */
+public class BeanPropertyAssocManyJsonTransient {
+
+  /**
+   * Use Jackson ObjectMapper to read the transient 'many' property.
+   */
+  public void jsonReadUsingObjectMapper(BeanPropertyAssocMany<?> many, ReadJson readJson, EntityBean parentBean) throws IOException {
+
+    ObjectMapper mapper = readJson.getObjectMapper();
+
+    ManyType manyType = many.getManyType();
+
+    Object value;
+    if (manyType.isMap()) {
+      // read map using Jackson object mapper with unknown key type
+      TypeFactory typeFactory = mapper.getTypeFactory();
+      JavaType target = typeFactory.constructType(many.getTargetType());
+      MapType jacksonType = typeFactory.constructMapType(LinkedHashMap.class, TypeFactory.unknownType(), target);
+      value = mapper.readValue(readJson.getParser(), jacksonType);
+
+    } else {
+      // read list or set using Jackson object mapper
+      CollectionType jacksonType = mapper.getTypeFactory().constructCollectionType(manyType.getCollectionType(), many.getTargetType());
+      value = mapper.readValue(readJson.getParser(), jacksonType);
+    }
+
+    many.setValue(parentBean, value);
+  }
+}