/**
* DOC amaumont Comment method "beforeLoopFind".
*
* @throws IOException
*/
private void beforeLoopFind() throws IOException {
// File file = new File(workDirectory + "TEMP_" + count);
// DataOutputStream dos = new DataOutputStream(new BufferedOutputStream(new
// FileOutputStream(file)));
int numFiles = files.size();
diss = new ArrayList<DataInputStream>();
datas = new ArrayList<DataContainer>();
fileLengths = new ArrayList<Long>();
boolean someFileStillHasRows = false;
for (int i = 0; i < numFiles; i++) {
diss.add(new DataInputStream(new BufferedInputStream(new FileInputStream(files.get(i)))));
fileLengths.add(files.get(i).length());
DataContainer dc = new DataContainer();
DataInputStream dis = diss.get(i);
byte[] bytes = new byte[dis.readInt()];
dis.read(bytes);
dc.object = iLightSerializable.createInstance(bytes);
if (!someFileStillHasRows) {
someFileStillHasRows = true;
}
datas.add(dc);
}
}
/**
* DOC amaumont Comment method "findNextData".
*
* @throws IOException
*/
private void findNextData() throws IOException {
DataContainer min = null;
int minIndex = 0;
DataContainer dataContainer = datas.get(0);
if (dataContainer.object != null) {
min = dataContainer;
minIndex = 0;
} else {
min = null;
minIndex = -1;
}
// check which one is min
for (int i = 1; i < datas.size(); i++) {
dataContainer = datas.get(i);
if (min != null) {
if (dataContainer.object != null
&& ((Comparable) (dataContainer.object)).compareTo(min.object) < 0) {
minIndex = i;
min = dataContainer;
}
} else {
if (dataContainer.object != null) {
min = dataContainer;
minIndex = i;
}
}
}
if (minIndex < 0) {
someFileStillHasRows = false;
} else {
// write to the sorted file
// write(min.data, dos);
currentObject = (V) min.object;
min.reset();
// get another data from the file
DataInputStream dis = diss.get(minIndex);
if (dis.available() > 0) {
byte[] bytes = new byte[dis.readInt()];
dis.read(bytes);
min.object = iLightSerializable.createInstance(bytes);
min.cursorPosition += 4 + bytes.length;
}
// check if one still has data
someFileStillHasRows = false;
for (int i = 0; i < datas.size(); i++) {
if (datas.get(i).object != null) {
someFileStillHasRows = true;
break;
}
}
}
}
