Craig McClanahan wrote:
On 1/4/06, Garner, Shawn <[EMAIL PROTECTED]> wrote:
How do you get access to one managed bean from within another managed
bean?
We have some business logic that depends on values in another managed.
If you're trying to gain access from a class that extends AbstractFacesBean
or AbstractViewController, this is really simple:
MyBean bean = (MyBean) getBean("name"); // "name" == managed bean name
of the other bean
If you are in a class that doesn't extend one of these, it's a little more
work but still straightforward:
FacesContext context = FacesContext.getCurrentInstance();
ValueBinding vb = context.getApplication().createValueBinding("#{name}");
MyBean bean = (MyBean) vb.getValue(context);
Either of the above techniques will cause the other managed bean to be
created, if it doesn't exist. If you *know* it exists, and what scope it is
in, you can also use the appropriate scoped map. Assume the other bean is
in session scope:
FacesContext context = FacesContext.getCurrentInstance();
MyBean bean = (MyBean) context.getExternalContext
().getSessionMap().get("name");
Shawn
Craig
It's probably also worth pointing out that you could use 'dependency
injection' -- i.e. a managed property -- to supply the dependent bean
with its dependency, declaratively, through the faces-config.xml.
L.
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