Package com.avaje.ebean.text.json

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          Description

Package com.avaje.ebean.text.json Description

JSON formatting and parsing objects (See JsonContext).

The goal is to provide JSON support taking into account various ORM issues such as partial objects (for fetching and updating), reference beans and bi-directional relationships.

Example:

  // find some customers ...
  
 List<Customer> list = Ebean.find(Customer.class)
     .select("id, name, status, shippingAddress")
     .fetch("billingAddress","line1, city")
     .fetch("billingAddress.country", "*")
     .fetch("contacts", "firstName,email")
     .order().desc("id")
     .findList();
 
 JsonContext json = Ebean.createJsonContext();
 
 JsonWriteOptions writeOptions = new JsonWriteOptions();
 writeOptions.setRootPathVisitor(new JsonWriteBeanVisitor<Customer>() {
 
     public void visit(Customer bean, JsonWriter ctx) {
         System.out.println("write visit customer: " + bean);
         ctx.appendKeyValue("dummyCust", "34");
         ctx.appendKeyValue("smallCustObject", "{\"a\":34,\"b\":\"asdasdasd\"}");
     }
 });
 
 writeOptions.setPathProperties("contacts", "firstName,id");
 writeOptions.setPathVisitor("contacts", new JsonWriteBeanVisitor<Contact>() {
 
     public void visit(Contact bean, JsonWriter ctx) {
         System.out.println("write additional custom json on customer: " + bean);
         ctx.appendKeyValue("dummy", "  3400" + bean.getId() + "");
         ctx.appendKeyValue("smallObject", "{\"contactA\":34,\"contactB\":\"banana\"}");
     }
 
 });
 
  // output as a JSON string with pretty formatting
 String s = json.toJsonString(list, true, writeOptions);