private static int findAttributePage(int fileId, String attrId, boolean toWrite)
throws IOException {
checkFileIsValid(fileId);
Storage storage = getAttributesStorage();
int encodedAttrId = DbConnection.getAttributeId(attrId);
int recordId = getAttributeRecordId(fileId);
if (recordId == 0) {
if (!toWrite) return 0;
recordId = storage.createNewRecord();
setAttributeRecordId(fileId, recordId);
} else {
DataInputStream attrRefs = storage.readStream(recordId);
try {
while (attrRefs.available() > 0) {
final int attIdOnPage = DataInputOutputUtil.readINT(attrRefs);
final int attrAddress = DataInputOutputUtil.readINT(attrRefs);
if (attIdOnPage == encodedAttrId) return attrAddress;
}
} finally {
attrRefs.close();
}
}
if (toWrite) {
Storage.AppenderStream appender = storage.appendStream(recordId);
DataInputOutputUtil.writeINT(appender, encodedAttrId);
int attrAddress = storage.createNewRecord();
DataInputOutputUtil.writeINT(appender, attrAddress);
DbConnection.REASONABLY_SMALL.myAttrPageRequested = true;
try {
appender.close();
} finally {
DbConnection.REASONABLY_SMALL.myAttrPageRequested = false;
}
return attrAddress;
}
return 0;
}
