CODEWITHSUNDEEP
java
Brooke
Brooke

Reputation: 435

How to pass a various number of parameters to .properties file for message?

I am using Tapestry and want to pass a various number of parameters to .properties file to print out messages on screen.

For example, I want to print the message out like this:

How would I define messages in properties file so that a various number of parameters can be passed? Can I pass them in list?

message=The messages for {0} - {1, list}

Upvotes: 1

Views: 896

Answers (1)

dosyfier
dosyfier

Reputation: 328

Tapestry provides a org.apache.tapestry.ioc.Messages service (in tapestry-ioc) which you can inject in any component to:

  • access any property specified in the .properties file attached to this component (method String get(String key)),
  • get and use a MessageFormatter object to do a kind of "String.format(...)" of a property of this same file.

On Java side, in a component class, what you can do to build a message the way you want is:

public class MyComponent {

    @Inject
    private Messages messages;

    @Property
    private String messageToDisplay;

    @SetupRender
    final void init() {
        // ...
        messageToDisplay = messages.get("some-key").format(valueForParam0, valueForParam1, ...);
        // ...
    }
}

Moreover, up from v5.3 of Tapestry, you can use the org.apache.tapestry5.alerts.AlertManager service to easily display messages as alerts (with level like "info", "warn", etc.).

Upvotes: 1

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