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| |
| Virtual Beans |
| |
| <p> |
| The {@link oaj.BeanContext#BEAN_useInterfaceProxies} setting (enabled by default) allows |
| the Juneau parsers to parse content into virtual beans (bean interfaces without implementation classes). |
| </p> |
| <p> |
| For example, the following code creates an instance of the specified unimplemented interface: |
| </p> |
| <p class='bpcode w800'> |
| <jc>// Our unimplemented interface</jc> |
| <jk>public interface</jk> Address { |
| |
| String getStreet(); |
| <jk>void</jk> setStreet(String x); |
| |
| String getCity(); |
| <jk>void</jk> setCity(String x); |
| |
| StateEnum getState(); |
| <jk>void</jk> setState(StateEnum x); |
| |
| <jk>int</jk> getZip(); |
| <jk>void</jk> setZip(<jk>int</jk> zip); |
| } |
| |
| <jc>// Our code</jc> |
| Address address = JsonParser.<jsf>DEFAULT</jsf>.parse( |
| <js>"{street:'123 Main St', city:'Anywhere', state:'PR', zip:12345}"</js>, |
| Address.<jk>class</jk> |
| ); |
| |
| <jk>int</jk> zip = address.getZip(); |
| address.setState(StateEnum.<jsf>NY</jsf>); |
| </p> |
| <p> |
| Getter and setter values can be any {@doc PojoCategories parsable} values, even other virtual beans. |
| </p> |
| <p> |
| Under-the-covers, a virtual bean is simply a proxy interface on top of an existing <c>BeanMap</c> |
| instance. From a programmatic point-of-view, they're indistinguishable from real beans, and can be |
| manipulated and serialized like any other bean. |
| </p> |
| <p> |
| Virtual beans can also be created programmatically using the <c>BeanContext</c> class: |
| </p> |
| <p class='bpcode w800'> |
| Address address = BeanContext.<jsf>DEFAULT</jsf>.createSession().newBean(Address.<jk>class</jk>); |
| </p> |