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marți, 30 iunie 2015

[OmniFaces utilities 2.1] Programmatically EL-resolve the given property on the given base object and set the given value


[OmniFaces utilities] The resolveExpressionSet() method programmatically EL-resolve the given property on the given base object and set the given value.

Method:
See also: Faces#getContext()
Usage:

Let's suppose that we have the following simple bean:

@Named
@SessionScoped
public class CommandBean {

 private String command;
 private String process;

 public String getProcess() {
  return process;
 }

 public void setProcess(String process) {
  this.process = process;
 }       

 public String getCommand() {
  return command;
 }

 public void setCommand(String command) {
  this.command = command;
 }
}

Now, for an instance of CommandBean, we can set the command as /f /pid 8080 and the process as taskkill via the Faces#resolveExpressionSet():

CommandBean commandBean = new CommandBean();
Faces.resolveExpressionSet(commandBean, "command", "/f /pid 8080");
Faces.resolveExpressionSet(commandBean, "process", "taskkill");

We can easily perform a check via Faces#resolveExpressionGet():

// returns /f /pid 8080
String command = Faces.resolveExpressionGet(commandBean, "command");
// returns taskkill
String process = Faces.resolveExpressionGet(commandBean, "process");

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