private void loadFromFile() throws IOException, ReflectiveOperationException {
RandomAccessFile file = null;
try {
int fieldId = 0;
file = new RandomAccessFile(filePath, "r");
while (file.getFilePointer() < file.length()) {
String fieldName = file.readUTF();
int fieldType = file.readUnsignedByte();
BitSet bitSet = BitSet.valueOf(new byte[] {file.readByte()});
boolean indexed = bitSet.get(BIT_INDEX_INDEXED);
boolean stored = bitSet.get(BIT_INDEX_STORED);
Field f = new Field();
f.setFieldId(fieldId);
f.setFieldName(fieldName);
f.setIsIndexed(indexed);
f.setIsStored(stored);
f.setFieldType(fieldTypeStore.findTypeById(fieldType));
fieldIdMapping.add(f);
fieldNameMapping.put(f.getFieldName(), f);
fieldId++;
}
} finally {
if (file != null) {
file.close();
}
}
}
public int getOrCreateField(Field f) throws IOException, ReflectiveOperationException {
if (fieldIdMapping.size() > f.getFieldId()) {
return fieldIdMapping.get(f.getFieldId()).getFieldId();
}
RandomAccessFile file = null;
try {
file = new RandomAccessFile(filePath, "rw");
file.seek(file.length());
f.setFieldId(fieldIdMapping.size());
file.writeUTF(f.getFieldName());
int typeId = fieldTypeStore.getOrCreateTypeId(f.getFieldType());
file.writeByte(typeId);
BitSet bitSet = new BitSet(8);
bitSet.set(BIT_INDEX_INDEXED, f.isIndexed());
bitSet.set(BIT_INDEX_STORED, f.isStored());
file.write(bitSet.toByteArray());
// Add to indexes
fieldIdMapping.add(f);
fieldNameMapping.put(f.getFieldName(), f);
return f.getFieldId();
} finally {
if (file != null) {
file.close();
}
}
}
public void deleteAll() throws IOException {
// Clear file
RandomAccessFile file = new RandomAccessFile(filePath, "rw");
file.setLength(0);
// Clear cache
fieldNameMapping.clear();
fieldIdMapping.clear();
fieldTypeStore.deleteAll();
}