I have read the article "Providers for multiple instances" in this
link http://code.google.com/p/google-guice/wiki/InjectingProviders.
The example shown is:
public class LogFileTransactionLog implements TransactionLog {
private final Provider<LogFileEntry> logFileProvider;
@Inject
public LogFileTransactionLog(Provider<LogFileEntry> logFileProvider)
{
this.logFileProvider = logFileProvider;
}
public void logChargeResult(ChargeResult result) {
LogFileEntry summaryEntry = logFileProvider.get();
summaryEntry.setText("Charge " + (result.wasSuccessful() ?
"success" : "failure"));
summaryEntry.save();
if (!result.wasSuccessful()) {
LogFileEntry detailEntry = logFileProvider.get();
detailEntry.setText("Failure result: " + result);
detailEntry.save();
}
}
There are two places to call logFileProvider.get() method. Are they
return the same type of LogFileEntry? If they return different type of
LogFileEntry, how does logFileProvider know which type is requested?
thanks.
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