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[T3A4][W09-A3]Yim Chia Hui #117

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[T3A4][W09-A3]Yim Chia Hui #117

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a94424c
Checks whether file exists while program is running
sharkey1314 Jan 31, 2017
c79f015
Forgot to add the check in Main.java
sharkey1314 Jan 31, 2017
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3 changes: 3 additions & 0 deletions src/seedu/addressbook/Main.java
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Original file line number Diff line number Diff line change
Expand Up @@ -80,6 +80,9 @@ private void exit() {
private void runCommandLoopUntilExitCommand() {
Command command;
do {
if (!storage.ifFileExists()) {
ui.showToUser("File just disappeared for no reason...");
}
String userCommandText = ui.getUserCommand();
command = new Parser().parseCommand(userCommandText);
CommandResult result = executeCommand(command);
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16 changes: 16 additions & 0 deletions src/seedu/addressbook/storage/StorageFile.java
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Expand Up @@ -17,8 +17,10 @@
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;

/**
* Represents the file used to store address book data.
Expand All @@ -28,6 +30,8 @@ public class StorageFile {
/** Default file path used if the user doesn't provide the file name. */
public static final String DEFAULT_STORAGE_FILEPATH = "addressbook.xml";

private static final String MESSAGE_ERROR_MISSING_STORAGE_FILE = null;

/* Note: Note the use of nested classes below.
* More info https://docs.oracle.com/javase/tutorial/java/javaOO/nested.html
*/
Expand Down Expand Up @@ -85,6 +89,18 @@ public StorageFile(String filePath) throws InvalidStorageFilePathException {
private static boolean isValidPath(Path filePath) {
return filePath.toString().endsWith(".xml");
}

public boolean ifFileExists() {
ArrayList<String> lines = null;
try {
lines = new ArrayList<>(Files.readAllLines(Paths.get(DEFAULT_STORAGE_FILEPATH)));
} catch (FileNotFoundException fnfe) {
return false;
} catch (IOException ioe) {
return false;
}
return true;
}

/**
* Saves all data to this storage file.
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