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package net.tuschhcm.routercontrol;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
/**
* Class to represent a router preset.
*/
public class Preset {
private static final String UNNAMED = "<Unnamed Preset>";
/**
* Name of the preset.
*/
private String mName;
/**
* List of inputs for outputs.
* List index corresponds with the output.
*/
private final ArrayList<Integer> mInputs;
/**
* Load a preset from the given file.
*
* @param file The file to load.
* @return the Preset object
* @throws IllegalArgumentException if the preset can't be loaded.
*/
public static Preset loadPresetFile(File file) throws IllegalArgumentException {
try {
Preset preset = new Preset();
BufferedReader in = new BufferedReader(new FileReader(file));
int lineno = 1;
String line = in.readLine();
if (line == null) {
throw new IllegalArgumentException("Empty preset file: " + file);
}
// The name is optional and starts with a #
if (line.charAt(0) == '#') {
preset.mName = line.substring(1).trim();
line = in.readLine();
lineno++;
}
// Read the inputs.
int output = 1;
while (line != null && !line.equals("")) {
try {
final Integer input = Integer.valueOf(line.trim());
preset.mInputs.add(input);
output++;
} catch (final NumberFormatException nfe) {
throw new IllegalArgumentException(
String.format("%s: Input set for output %d on line %d is not a number.",
file, output, lineno));
}
line = in.readLine();
lineno++;
}
in.close();
return preset;
} catch (final IOException e) {
throw new IllegalArgumentException("Could not read " + file, e);
}
}
/**
* Constructor for Preset.
*/
public Preset() {
mName = UNNAMED;
mInputs = new ArrayList<Integer>();
}
/**
* Get the name of the preset.
*
* @return The preset name
*/
public String getName() {
return mName;
}
/**
* Get an input for the given output.
*
* @param output
* @return Input number, or 0 if no change.
* @throws IllegalArgumentException if the output isn't defined.
*/
public int getInputForOutput(final int output) {
final int index = output - 1;
if (index < 0 || index > mInputs.size()) {
throw new IllegalArgumentException("Output out of range.");
}
return mInputs.get(output);
}
/**
* @return The number of outputs defined in this preset.
*/
public int getNumberOfOutputs() {
return mInputs.size();
}
/**
* Return a string representation of this preset.
*/
public String toString() {
String str = "";
if (!mName.equals(UNNAMED)) {
str = "# " + mName + "\n";
}
for (Integer in : mInputs) {
str += in + "\n";
}
return str;
}
}
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