/**
* Append the specified IEntryResult[] to the IEntryResult to create a single result representing
* an index entry that was split across multiple index records.
*
* @param result
* @param continuationResults
* @param blockSize
*/
public static IEntryResult joinEntryResults(
final IEntryResult result, final IEntryResult[] continuationResults, final int blockSize) {
CoreArgCheck.isNotNull(result);
// If the IEntryResult is not continued on another record, return the original
char[] baseResult = result.getWord();
if (baseResult.length < blockSize
|| baseResult[blockSize - 1] != IndexConstants.RECORD_TYPE.RECORD_CONTINUATION) {
return result;
}
// Extract the UUID string from the original result
String baseStr = new String(baseResult);
String objectID = extractUUIDString(result);
// Create and initialize a StringBuffer to store the concatenated result
StringBuffer sb = new StringBuffer();
sb.append(baseStr.substring(0, blockSize - 1));
// Append the continuation results onto the original -
// assumes the IEntryResult[] are in ascending order of segment number
final IEntryResult[] sortedResults = sortContinuationResults(objectID, continuationResults);
for (int i = 0; i < sortedResults.length; i++) {
char[] continuation = sortedResults[i].getWord();
int segNumber = getContinuationSegmentNumber(objectID, sortedResults[i]);
int beginIndex = objectID.length() + Integer.toString(segNumber).length() + 5;
for (int j = beginIndex; j < continuation.length; j++) {
if (j < blockSize - 1) {
sb.append(continuation[j]);
}
}
}
return new EntryResult(sb.toString().toCharArray(), result.getFileReferences());
}
public static int getContinuationSegmentNumber(
final String objectID, final IEntryResult continuationResult) {
// The header portion of the continuation record is of the form:
// RECORD_CONTINUATION|objectID|segmentCount|
char[] record = continuationResult.getWord();
int segNumber = -1;
int index = objectID.length() + 4;
if (record[index + 1] == IndexConstants.RECORD_STRING.RECORD_DELIMITER) {
// segment count < 10
segNumber = Character.getNumericValue(record[index]);
} else if (record[index + 2] == IndexConstants.RECORD_STRING.RECORD_DELIMITER) {
// 9 < segment count < 100
char[] temp = new char[] {record[index], record[index + 1]};
String segCount = new String(temp);
segNumber = Integer.parseInt(segCount);
} else if (record[index + 3] == IndexConstants.RECORD_STRING.RECORD_DELIMITER) {
// 99 < segment count < 1000
char[] temp = new char[] {record[index], record[index + 1], record[index + 2]};
String segCount = new String(temp);
segNumber = Integer.parseInt(segCount);
}
return segNumber;
}
/**
* Return the {@link org.teiid.designer.metadata.runtime.MetadataRecord} instances for specified
* IEntryResult.
*
* @param entryResult
* @param container Container reference to be set on the record
*/
public static MetadataRecord getMetadataRecord(
final IEntryResult queryResult, final EObjectFinder container) {
MetadataRecord record = getMetadataRecord(queryResult.getWord());
if (record instanceof AbstractMetadataRecord) {
((AbstractMetadataRecord) record).setEObjectFinder(container);
}
return record;
}
/**
* Extract the UUID string from the IEntryResult
*
* @param result
*/
public static String extractUUIDString(final IEntryResult result) {
CoreArgCheck.isNotNull(result);
char[] word = result.getWord();
String baseStr = new String(word);
int beginIndex = baseStr.indexOf(UUID.PROTOCOL);
int endIndex = word.length;
CoreArgCheck.isNonNegative(beginIndex);
for (int i = beginIndex; i < word.length; i++) {
if (word[i] == IndexConstants.RECORD_STRING.RECORD_DELIMITER) {
endIndex = i;
break;
}
}
CoreArgCheck.isTrue(beginIndex < endIndex, "begin index should be less than end index");
return baseStr.substring(beginIndex, endIndex);
}
