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filebot/source/net/sourceforge/tuned/PreferencesList.java
Reinhard Pointner deb15a6e15 * install Format/Validate view between namesList and model.names()
* refactored Preferences wrapper and unit tests
2009-03-08 18:41:11 +00:00

116 lines
2.0 KiB
Java

package net.sourceforge.tuned;
import java.util.AbstractList;
import java.util.ArrayList;
import java.util.List;
import java.util.prefs.Preferences;
import net.sourceforge.tuned.PreferencesMap.Adapter;
public class PreferencesList<T> extends AbstractList<T> {
private final PreferencesMap<T> prefs;
public PreferencesList(PreferencesMap<T> preferencesMap) {
this.prefs = preferencesMap;
}
@Override
public T get(int index) {
return prefs.get(key(index));
}
private String key(int index) {
return Integer.toString(index);
}
@Override
public int size() {
return prefs.size();
}
@Override
public boolean add(T e) {
setImpl(size(), e);
return true;
}
@Override
public void add(int index, T element) {
int size = size();
if (index > size)
throw new IndexOutOfBoundsException(String.format("Index: %d, Size: %d", index, size));
copy(index, index + 1, size - index);
setImpl(index, element);
}
private T setImpl(int index, T element) {
return prefs.put(key(index), element);
}
/**
* @return always null
*/
@Override
public T remove(int index) {
int lastIndex = size() - 1;
copy(index + 1, index, lastIndex - index);
prefs.remove(key(lastIndex));
return null;
}
@Override
public T set(int index, T element) {
if (index < 0 || index >= size())
throw new IndexOutOfBoundsException();
return setImpl(index, element);
}
private void copy(int startIndex, int newStartIndex, int count) {
if (count == 0 || startIndex == newStartIndex)
return;
List<T> copy = new ArrayList<T>(subList(startIndex, startIndex + count));
for (int i = newStartIndex, n = 0; n < count; i++, n++) {
setImpl(i, copy.get(n));
}
}
@Override
public void clear() {
prefs.clear();
}
public static PreferencesList<String> map(Preferences prefs) {
return new PreferencesList<String>(PreferencesMap.map(prefs));
}
public static <T> PreferencesList<T> map(Preferences prefs, Adapter<T> adapter) {
return new PreferencesList<T>(PreferencesMap.map(prefs, adapter));
}
}