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Rewrite FilePreferences

This commit is contained in:
Reinhard Pointner 2016-10-23 07:08:04 +08:00
parent a545c6d727
commit bedbeb6384

View File

@ -19,6 +19,7 @@ import java.util.Properties;
public class PropertyFileBackingStore {
private Path store;
private int modCount = 0;
private Map<String, Map<String, String>> nodes = new HashMap<String, Map<String, String>>();
@ -31,6 +32,7 @@ public class PropertyFileBackingStore {
}
public synchronized String setValue(String node, String key, String value) {
modCount++;
return nodes.computeIfAbsent(node, this::newKeyValueMap).put(key, value);
}
@ -45,11 +47,13 @@ public class PropertyFileBackingStore {
public synchronized void removeValue(String node, String key) {
Map<String, String> values = nodes.get(node);
if (values != null) {
modCount++;
values.remove(key);
}
}
public synchronized void removeNode(String node) {
modCount++;
nodes.remove(node);
}
@ -115,6 +119,10 @@ public class PropertyFileBackingStore {
}
public void flush() throws IOException {
if (modCount == 0) {
return;
}
StringWriter buffer = new StringWriter();
toProperties().store(buffer, null);
@ -126,6 +134,8 @@ public class PropertyFileBackingStore {
out.truncate(out.position());
}
}
modCount = 0; // reset
}
@Override