Group items tagged

Serializing between ActionScript and Java

java.util.Date (formatted for Coordinated Universal Time (UTC))

Mapping enum to database column using JPA/Hibernate You can use any of the 3 approaches discussed above. Map the enum to an integer column. The persistence implementation should automatically convert enum to ordinal() and back for you. Map the enum to a String column. The persistence implementation should automatically convert the enum value to String value via the name() function. Map the enum using a business value. You should mark the enum field as @Transient, and create another String field which you can map to a String column in your database table. Here’s an example code snippet. view plaincopy to clipboardprint?@Entity  public class Product {   @Column   private String colorValue;     @Transient   public Color getColor() {    return Color.fromValue(colorValue);   }     public void setColor(Color color) {    this.colorValue = color.toValue();   }  }  

Approach 3: Using a user defined business value – Recommended approach! This approach involves assigning a an explicit user defined value to each enum constant and defining a toValue() and fromValue() methods on the enum to do the serialization and deserialization.

public enum Color {   RED("RED"), GREEN("GREEN"), BLUE("BLUE"), UNKNOWN("UNKNOWN");     private final String value;     Color(String value) {     this.value = value;   }     public static Color fromValue(String value) {     if (value != null) {       for (Color color : values()) {         if (color.value.equals(value)) {           return color;         }       }     }       // you may return a default value     return getDefault();     // or throw an exception     // throw new IllegalArgumentException("Invalid color: " + value);   }     public String toValue() {     return value;   }     public static Color getDefault() {     return UNKNOWN;   }  }  public enum Color { RED("RED"), GREEN("GREEN"), BLUE("BLUE"), UNKNOWN("UNKNOWN"); private final String value; Color(String value) { this.value = value; } public static Color fromValue(String value) { if (value != null) { for (Color color : values()) { if (color.value.equals(value)) { return color; } } } // you may return a default value return getDefault(); // or throw an exception // throw new IllegalArgumentException("Invalid color: " + value); } public String toValue() { return value; } public static Color getDefault() { return UNKNOWN; } } This approach is better than approach 1 and approach 2 above. It neither depends on the order in which the enum constants are declared nor on the constant names.

4.3. Mapping Java and AS3 objects

data conversions are done during serialization/deserialization

serial approach which risks communication errors

parallel approach which risks double work (both of us would have explored the same schema issues, her from an object point of view and me from the data point of view) and incompatible work (we could have easily made different schema design decisions)

entity-pruner prune JPA entities so they can be serialized for client service calls

GraniteDS – deserialize ActionScript object to a Java Map object

key of type String and a value of type List

Project Overview

comprehensive development and integration platform for building Flex / Java EE RIA applications

open source

Hello World, revisited with EJB3

history is persisted in the database by means of a JPA entity bean and those objects are serialized back to the Flex client each time you enter a new name.

GraniteDS provides out-of-the-box integration with CDI via the Tide API

Integration with CDI

fully supports serialization of JPA entities from and to your Flex application, taking care of lazily loaded associations

Integration with Seam 2.2

GraniteDS provides out-of-the-box integration with Seam 2.2 via either the RemoteObject API or the Tide API to remotely call Seam components, and fully supports serialization of JPA entities from and to your Flex application, taking care of lazily loaded associations

JPA and Lazy Initialization