com.scudata.dw.IndexCursor Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of esproc Show documentation
Show all versions of esproc Show documentation
SPL(Structured Process Language) A programming language specially for structured data computing.
package com.scudata.dw;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import com.scudata.common.MessageManager;
import com.scudata.common.RQException;
import com.scudata.dm.Context;
import com.scudata.dm.DataStruct;
import com.scudata.dm.ObjectReader;
import com.scudata.dm.Record;
import com.scudata.dm.Sequence;
import com.scudata.dm.Table;
import com.scudata.dm.cursor.ICursor;
import com.scudata.dm.cursor.MultipathCursors;
import com.scudata.resources.EngineMessage;
/**
* ??????????α???
* @author runqian
*
*/
public class IndexCursor extends ICursor {
private int BUFFER_SIZE = 1024 * 1024;
private PhyTable table;
private String []fields;//ȡ???ֶ?
private String []ifields;//?????ֶ?
private String opt;
private DataStruct ds;
private BlockLinkReader rowCountReader;
private BlockLinkReader []colReaders;
private ObjectReader []segmentReaders;
private ColumnMetaData []columns;
private RandomAccessFile raf;
private byte []bytes;
private BufferReader rowDataReader;
private int allCount;
private int []serialBytesLen;
private int dataBlockCount;
private int curBlock = 0;
private int index = 0;
private boolean isSorted = false; // α???????Ƿ???????
private long []pos;// ?д?α??????
private long [][]posArr;// ?д?α?š???ַ????
private int posCount;
private long curNum = 0;//??ǰα??
private int rest = 0;//??ǰ?п??ʣ??????
private BufferReader []bufReaders;//??ǰ?п??reader
private int mindex = 0;
ArrayList modifyRecordList;//??????¼
private int []findex; //????ѡ???ֶζ?Ӧ???ֶκ?
private boolean isRow;//?Ƿ??д?
private int blockSize;
private boolean isPrimaryTable;//?Ƿ????
private PhyTable baseTable;
private boolean []isBaseIndex; //ȡ???ֶ????????????ӱ?
//?????Ǹ???ʱʹ??
private ColumnMetaData guideColumn;//????
private BlockLinkReader guideColReader;
private ObjectReader guideSegmentReader;
private BufferReader guideColBufReader;
private BlockLinkReader baseRowCountReader;
private Object []baseCurValues;//?????ĵ?ǰ??¼ֵ
private int baseRest;
private long baseCurIndex;
private boolean needBaseTable;//ȡ?????????л??????ֶ?
private boolean isRealValue;//?ͽ???????ֱ??ֵ?????ǵ?ַ????key-value-index??
private Object [] values;
private transient int fcount;
/**
* ?д??????α?
* ????recNum??¼??ȡ??
* @param table ԭ??
* @param fields ȡ???ֶ?
* @param ifields ?????ֶ?
* @param recNum ????ļ?¼??
* @param opt
*/
public IndexCursor(PhyTable table, String []fields, String []ifields, long []recNum, String opt) {
this(table, fields, ifields, recNum, opt, null);
}
/**
* ?д??????α?
* ????pos??ĵ?ַȡ??
* @param table ԭ??
* @param fields ȡ???ֶ?
* @param ifields ?????ֶ?
* @param pos ????ĵ?ַ
* @param opt
* @param ctx
*/
public IndexCursor(PhyTable table, String []fields, String []ifields, long []pos, String opt, Context ctx) {
this.table = table;
this.fields = fields;
this.ifields = ifields;
this.pos = pos;
this.ctx = ctx;
this.opt = opt;
isRow = table instanceof RowPhyTable;
isPrimaryTable = table.parent == null;
if (isRow) {
initRow();
} else {
initCol();
}
}
/**
* KV?????α?
* values?????Ҫ???ص????ݣ???????ȥԭ??ȡ??
* @param table ԭ??
* @param fields ȡ???ֶ?
* @param ifields ?????ֶ?
* @param values ?????ֵ
*/
public IndexCursor(PhyTable table, String []fields, String []ifields, Object []values) {
this.table = table;
this.fields = fields;
this.ifields = ifields;
isRealValue = true;
this.values = values;
ds = new DataStruct(fields);
int colCount = fields.length;
fcount = colCount;
DataStruct srcDs = table.getDataStruct();
findex = new int[colCount];
for (int i = 0; i < colCount; ++i) {
findex[i] = srcDs.getFieldIndex(fields[i]);
}
posCount = values.length / (colCount + 1);
}
private void initRow() {
if (!isSorted) {
if (pos != null) {
int size, count;
if (table.parent == null) {
count = 2;
} else {
count = 3;
}
size = pos.length / count;
long [][]posArr = new long[size][];
for (int i = 0; i < size; i++) {
long[] posRecord = new long[count];
for (int c = 0; c < count; c++) {
posRecord[c] = pos[i * count + c];
}
posArr[i] = posRecord;
}
if (opt != null && opt.indexOf('s') != -1) {
this.posArr = posArr;
} else {
Arrays.sort(posArr, new PositionsComparator());
this.posArr = posArr;
}
}
posCount = posArr == null ? 0 : posArr.length;
isSorted = true;
}
RowPhyTable table = (RowPhyTable) this.table;
dataBlockCount = table.getDataBlockCount();
blockSize = table.getGroupTable().blockSize;
if (fields == null) {
fields = table.getAllColNames();
}
ds = new DataStruct(fields);
int colCount = fields.length;
// try {
// raf = new RandomAccessFile(table.groupTable.file, "rw");
// } catch (FileNotFoundException e) {
// throw new RQException(e.getMessage(), e);
// }
raf = table.groupTable.raf;
bytes = new byte[BUFFER_SIZE];
rowDataReader = new BufferReader(table.getStructManager(), bytes);
allCount = table.getColNames().length;
DataStruct srcDs = table.getDataStruct();
findex = new int[colCount];
for (int i = 0; i < colCount; ++i) {
findex[i] = srcDs.getFieldIndex(fields[i]);
}
boolean flag = colCount == srcDs.getFieldCount();
if (flag) {
for (int i = 0; i < colCount; ++i) {
if (findex[i] == i) {
flag = true;
} else {
flag = false;
break;
}
}
}
if (flag && isPrimaryTable && modifyRecordList == null) {
//????Ҫfindex
findex = null;
}
int c = 0;
serialBytesLen = table.getSerialBytesLen();
for (int i = 0; i < colCount; ++i) {
c += serialBytesLen[i];
}
if (c == 0) {
serialBytesLen = null;
}
needBaseTable = false;
if (!isPrimaryTable) {
baseTable = table.parent;
DataStruct baseTableDs = baseTable.getDataStruct();
isBaseIndex = new boolean[colCount];
for (int i = 0; i < colCount; ++i) {
boolean b = -1 != baseTableDs.getFieldIndex(fields[i]);
isBaseIndex[i] = b;
if (b) {
findex[i] = baseTableDs.getFieldIndex(fields[i]);
needBaseTable = true;
}
}
}
}
private void initCol() {
if (!isSorted && pos != null) {
if (opt != null && opt.indexOf('s') != -1) {
} else {
Arrays.sort(pos);
}
posCount = pos.length;
isSorted = true;
}
ColPhyTable table = (ColPhyTable) this.table;
dataBlockCount = table.getDataBlockCount();
if (fields == null) {
columns = table.getAllColumns();
fields = table.getAllColNames();
} else {
if (isPrimaryTable) {
columns = table.getColumns(fields);
} else {
baseTable = table.parent;
int count = fields.length;
columns = new ColumnMetaData[count];
for (int i = 0; i < count; ++i) {
String field = fields[i];
ColumnMetaData col = table.getColumn(field);
if (col == null) {
col = ((ColPhyTable) baseTable).getColumn(field);
}
if (col != null) {
columns[i] = col;
} else {
MessageManager mm = EngineMessage.get();
throw new RQException(field + mm.getMessage("ds.fieldNotExist"));
}
}
}
}
ds = new DataStruct(fields);
int colCount = columns.length;
rowCountReader = table.getSegmentReader();
colReaders = new BlockLinkReader[colCount];
for (int i = 0; i < colCount; ++i) {
colReaders[i] = columns[i].getColReader(true);
}
//
segmentReaders = new ObjectReader[colCount];
for (int i = 0; i < colCount; ++i) {
segmentReaders[i] = columns[i].getSegmentReader();
}
DataStruct srcDs = table.getDataStruct();
findex = new int[colCount];
for (int i = 0; i < colCount; ++i) {
findex[i] = srcDs.getFieldIndex(fields[i]);
}
needBaseTable = false;
isBaseIndex = new boolean[colCount];
if (!isPrimaryTable) {
baseTable = table.parent;
for (int i = 0; i < colCount; ++i) {
boolean b = null != ((ColPhyTable) baseTable).getColumn(fields[i]);
isBaseIndex[i] = b;
if (b) {
needBaseTable = true;
}
}
guideColumn = table.getGuideColumn();
guideColReader = guideColumn.getColReader(true);
guideSegmentReader = guideColumn.getSegmentReader();
baseCurValues = new Object[colCount];
baseRowCountReader = baseTable.getSegmentReader();
}
}
private long getRecordNum() throws IOException {
if (index >= posCount) {
return -1;
}
if (isRealValue) {
long pos = (Long) values[(index + 1)* (fcount + 1) - 1];
return pos;
}
if (!isRow) {
long pos = this.pos[index];
return pos;//?д?ʱ????α??
}
return this.posArr[index][0];
}
private void readBytes(long pos, byte []bytes) throws IOException {
raf.seek(pos);
int offset = (int) (pos % this.blockSize);
int rest = blockSize - IBlockStorage.POS_SIZE - offset;
if (rest < BUFFER_SIZE) {
raf.readFully(bytes, 0, rest);
byte[] nextPos = new byte[IBlockStorage.POS_SIZE];
raf.readFully(nextPos);
pos = (((long)(nextPos[0] & 0xff) << 32) +
((long)(nextPos[1] & 0xff) << 24) +
((nextPos[2] & 0xff) << 16) +
((nextPos[3] & 0xff) << 8) +
(nextPos[4] & 0xff));
raf.seek(pos);
raf.readFully(bytes, rest, BUFFER_SIZE - rest);
} else {
raf.readFully(bytes);
}
}
private Object[] getRowRecordValues() throws IOException {
int baseCount = 0;
int colCount = this.fields.length;
Object []values;
Object []baseValues;
Object[] objs = null;
if (findex != null) {
objs = new Object[colCount];
}
byte []bytes = this.bytes;
long pos;
if (!isPrimaryTable) {
baseCount = baseTable.getColNames().length;
int baseKeyCount = baseTable.getSortedColNames().length;
if (needBaseTable) {
baseValues = new Object[baseCount];
pos = posArr[index][1];
readBytes(pos, bytes);
BufferReader rowDataReader = new BufferReader(table.getStructManager(), bytes);
serialBytesLen = baseTable.getSerialBytesLen();
rowDataReader.skipObject();//α??
for (int f = 0; f < baseCount; ++f) {
baseValues[f] = rowDataReader.readObject();
}
for (int f = 0; f < colCount; ++f) {
if (isBaseIndex[f]) {
objs[f] = baseValues[findex[f]];
}
}
rowDataReader.close();
}
pos = posArr[index][2];
readBytes(pos, bytes);
BufferReader rowDataReader = new BufferReader(table.getStructManager(), bytes);
rowDataReader.skipObject();//α??
rowDataReader.skipObject();//????
allCount = table.getColNames().length;
values = new Object[allCount + baseKeyCount];
serialBytesLen = table.getSerialBytesLen();
if (serialBytesLen != null) {
for (int f = 0; f < allCount; ++f) {
values[f + baseKeyCount] = rowDataReader.readObject();
}
} else {
for (int f = 0; f < allCount; ++f) {
values[f + baseKeyCount] = rowDataReader.readObject();
}
}
for (int f = 0; f < colCount; ++f) {
if (!isBaseIndex[f]) {
objs[f] = values[findex[f]];
}
}
} else {
pos = posArr[index][1];
readBytes(pos, bytes);
BufferReader rowDataReader = this.rowDataReader;
rowDataReader.reset();
rowDataReader.skipObject();//α??
values = new Object[allCount];
if (serialBytesLen != null) {
for (int f = 0; f < allCount; ++f) {
values[f] = rowDataReader.readObject();
}
} else {
for (int f = 0; f < allCount; ++f) {
values[f] = rowDataReader.readObject();
}
}
if (findex != null) {
for (int f = 0; f < colCount; ++f) {
objs[f] = values[findex[f]];
}
} else {
objs = values;
}
}
return objs;
}
private Object[] getRecordValues() throws IOException {
if (isRealValue) {
Object[] objs = new Object[fcount];
System.arraycopy(values, index* (fcount + 1), objs, 0, fcount);
return objs;
}
if (isRow) {
return getRowRecordValues();
}
long recNum = this.pos[index];
if (index != 0 && opt != null && opt.indexOf('s') != -1) {
if (recNum < this.pos[index - 1]) {
curBlock = 0;
rest = 0;
curNum = 0;
baseRest = 0;
baseCurIndex = 0;
int colCount = colReaders.length;
rowCountReader = table.getSegmentReader();
for (int i = 0; i < colCount; ++i) {
segmentReaders[i] = columns[i].getSegmentReader();
}
}
}
int curBlock = this.curBlock;
int dataBlockCount = this.dataBlockCount;
BlockLinkReader rowCountReader = this.rowCountReader;
BlockLinkReader []colReaders = this.colReaders;
int colCount = colReaders.length;
BufferReader []bufReaders = null;
BufferReader guideColBufReader = null;
long []pos = new long[colCount];
long guipos = 0;
long reCount = curNum;
Object[] objs = null;
boolean needBaseTable = this.needBaseTable;
boolean []isBaseIndex = this.isBaseIndex;
int rest = this.rest;
int baseRest = this.baseRest;
Object []baseCurValues = this.baseCurValues;
while (curBlock <= dataBlockCount) {
if (rest == 0) {
for(int i = 0; i < colCount; i++) {
pos[i] = segmentReaders[i].readLong40();
if (columns[i].hasMaxMinValues()) {
segmentReaders[i].skipObject();
segmentReaders[i].skipObject();
segmentReaders[i].skipObject();
}
}
rest = rowCountReader.readInt32();
if (needBaseTable) {
baseRest = baseRowCountReader.readInt32();
guipos = guideSegmentReader.readLong40();
}
curBlock++;
bufReaders = null;
guideColBufReader = null;
} else {
bufReaders = this.bufReaders;
guideColBufReader = this.guideColBufReader;
}
if (reCount + rest >= recNum) {
if (bufReaders == null) {
bufReaders = new BufferReader[colCount];
for (int f = 0; f < colCount; ++f) {
colReaders[f].seek(pos[f]);
bufReaders[f] = colReaders[f].readBlockData(pos[f], rest);
}
if (needBaseTable) {
guideColReader.seek(guipos);
guideColBufReader = guideColReader.readBlockData(guipos, baseRest);
baseCurIndex++;
for (int f = 0; f < colCount; ++f) {
if (isBaseIndex[f]) {
baseCurValues[f] = bufReaders[f].readObject();
}
}
baseRest--;
}
}
objs = new Object[colCount];
while(reCount + 1 != recNum) {
for (int f = 0; f < colCount; ++f) {
if (!isBaseIndex[f]) {
bufReaders[f].skipObject();
}
}
if (needBaseTable) {
guideColBufReader.skipObject();
}
reCount++;
rest--;
}
for (int f = 0; f < colCount; ++f) {
if (!isBaseIndex[f]) {
objs[f] = bufReaders[f].readObject();
}
}
if (needBaseTable) {
long baseCurIndex = this.baseCurIndex;
long seq = (Long) guideColBufReader.readObject();
while (seq != baseCurIndex) {
baseCurIndex++;
for (int f = 0; f < colCount; ++f) {
if (isBaseIndex[f]) {
baseCurValues[f] = bufReaders[f].readObject();
}
}
baseRest--;
}
for (int f = 0; f < colCount; ++f) {
if (isBaseIndex[f]) {
objs[f] = baseCurValues[f];
}
}
this.baseCurIndex = baseCurIndex;
}
reCount++;
rest--;
break;
} else {
reCount += rest;
rest = 0;
if (needBaseTable) {
this.baseCurIndex += baseRest;
baseRest = 0;
}
}
}
curNum = reCount;
this.rest = rest;
this.curBlock = curBlock;
this.baseRest = baseRest;
if (rest != 0) {
this.bufReaders = bufReaders;
this.guideColBufReader = guideColBufReader;
this.baseCurValues = baseCurValues;
}
return objs;
}
public void setModifyRecordList(ArrayList mr) {
this.modifyRecordList = mr;
}
public void setRowBufferSize(int maxRecordLen) {
BUFFER_SIZE = maxRecordLen;
bytes = new byte[BUFFER_SIZE];
rowDataReader = new BufferReader(table.getStructManager(), bytes);
}
protected Sequence get(int n) {
if (n < 1) return null;
ArrayList mrl = this.modifyRecordList;
Object recNum;
int length = posCount;
if (isRealValue) {
recNum = values;
} else if (isRow) {
recNum = posArr;
} else {
recNum = pos;
}
if (mrl == null && recNum == null) {
return null;
}
int mrlSize = 0;
int posLen = 0;
int rest = 0;
if (recNum != null) {
posLen = length;
rest = length - index;
}
if (mrl != null) {
mrlSize = mrl.size();
if (mindex >= mrlSize) {
mrl = null;
} else {
rest += mrl.size() - mindex;
}
}
if (rest <= n) {
n = rest;
}
try {
int colCount = fields.length;
Table table = new Table(ds, ICursor.FETCHCOUNT);
Object []values;
long seq = 0, mseq;
ModifyRecord mr;
int count = 0;
if (recNum != null) {
seq = getRecordNum();
}
if (mindex < mrlSize) {
mseq = mrl.get(mindex).getRecordSeq();
} else {
mseq = -1;
}
while (count < n) {
if (recNum != null && mrl == null) {
if (index >= posLen) {
break;
}
getRecordNum();
values = getRecordValues();
table.newLast(values);
++index;
++count;
} else if (mrl != null && recNum == null) {
if (mindex >= mrlSize) {
break;
}
mr = mrl.get(mindex++);
if (mr.isDelete()) {
continue;
}
Record sr = mr.getRecord();
values = new Object [colCount];
for (int f = 0; f < colCount; ++f) {
values[f] = sr.getNormalFieldValue(findex[f]);
}
table.newLast(values);
++count;
} else if (recNum != null && mrl != null) {
if (seq == mseq) {
if (seq == -1) {
break;
}
mr = mrl.get(mindex);
if (mr.isBottom()) {
values = getRecordValues();
table.newLast(values);
++index;
seq = getRecordNum();
if (seq == -1) {
recNum = null;
}
++count;
continue;
}
if (mr.isDelete()) {
++index;
seq = getRecordNum();
if (seq == -1) {
recNum = null;
}
++mindex;
if (mindex < mrlSize) {
mseq = mrl.get(mindex).getRecordSeq();
} else {
mseq = -1;
mrl = null;
}
continue;
} else {
Record sr = mrl.get(mindex).getRecord();
values = new Object [colCount];
for (int f = 0; f < colCount; ++f) {
values[f] = sr.getNormalFieldValue(findex[f]);
}
table.newLast(values);
++mindex;
if (mindex < mrlSize) {
mseq = mrl.get(mindex).getRecordSeq();
} else {
mseq = -1;
mrl = null;
}
if (mr.isUpdate()) {
++index;
seq = getRecordNum();
if (seq == -1) {
recNum = null;
}
}
++count;
continue;
}
} else if (seq < mseq) {
values = getRecordValues();
table.newLast(values);
++index;
seq = getRecordNum();
if (seq == -1) {
recNum = null;
}
++count;
continue;
} else if (mseq < seq) {
mr = mrl.get(mindex);
if (!mr.isDelete()) {
Record sr = mr.getRecord();
values = new Object [colCount];
for (int f = 0; f < colCount; ++f) {
values[f] = sr.getNormalFieldValue(findex[f]);
}
table.newLast(values);
++count;
}
++mindex;
if (mindex < mrlSize) {
mseq = mrl.get(mindex).getRecordSeq();
} else {
mseq = -1;
mrl = null;
}
continue;
}
}
}
if (table.length() == 0)
return null;
else
return table;
} catch (IOException e) {
close();
throw new RQException(e.getMessage(), e);
}
}
protected long skipOver(long n) {
if (n < 1) return 0;
ArrayList mrl = this.modifyRecordList;
Object recNum;
int length = posCount;
if (isRow) {
recNum = posArr;
} else {
recNum = pos;
}
if (mrl == null && recNum == null) {
return 0;
}
boolean isEnd = false;
int mrlSize = 0;
int posLen = 0;
int rest = 0;
if (recNum != null) {
posLen = length;
rest = length - index;
}
if (mrl != null) {
mrlSize = mrl.size();
if (mindex >= mrlSize) {
mrl = null;
} else {
rest += mrl.size() - mindex;
}
}
if (rest <= n) {
n = rest;
}
try {
long seq, mseq;
ModifyRecord mr;
int count = 0;
seq = getRecordNum();
if (mindex < mrlSize) {
mseq = mrl.get(mindex).getRecordSeq();
} else {
mseq = -1;
}
while (count < n) {
if (recNum != null && mrl == null) {
if (index >= posLen) {
break;
}
getRecordNum();
++index;
++count;
}
if (mrl != null && recNum == null) {
if (mindex >= mrlSize) {
isEnd = true;
break;
}
mr = mrl.get(mindex++);
if (mr.isDelete()) {
continue;
}
++count;
}
if (recNum != null && mrl != null) {
if (seq == mseq) {
if (seq == -1) {
isEnd = true;
break;
}
mr = mrl.get(mindex);
if (mr.isBottom()) {
++index;
seq = getRecordNum();
if (seq == -1) {
recNum = null;
}
++count;
continue;
}
if (mr.isDelete()) {
++index;
seq = getRecordNum();
if (seq == -1) {
recNum = null;
}
++mindex;
if (mindex < mrlSize) {
mseq = mrl.get(mindex).getRecordSeq();
} else {
mseq = -1;
mrl = null;
}
continue;
} else {
++mindex;
if (mindex < mrlSize) {
mseq = mrl.get(mindex).getRecordSeq();
} else {
mseq = -1;
mrl = null;
}
if (mr.isUpdate()) {
++index;
seq = getRecordNum();
if (seq == -1) {
recNum = null;
}
}
++count;
continue;
}
} else if (seq < mseq) {
++index;
seq = getRecordNum();
if (seq == -1) {
recNum = null;
}
++count;
continue;
} else if (mseq < seq) {
mr = mrl.get(mindex);
if (!mr.isDelete()) {
++count;
}
++mindex;
if (mindex < mrlSize) {
mseq = mrl.get(mindex).getRecordSeq();
} else {
mseq = -1;
mrl = null;
}
continue;
}
}
}
if (isEnd) {
close();
}
return count;
} catch (Exception e) {
close();
throw new RQException(e.getMessage(), e);
}
}
public void close() {
super.close();
cache = null;
try {
if (segmentReaders != null) {
for (ObjectReader reader : segmentReaders) {
reader.close();
}
}
// if (raf != null) {
// raf.close();
// }
} catch (Exception e) {
throw new RQException(e.getMessage(), e);
} finally {
rowCountReader = null;
colReaders = null;
segmentReaders = null;
}
}
public boolean reset() {
close();
curBlock = 0;
index = 0;
mindex = 0;
if (isRow) {
initRow();
} else {
initCol();
}
return true;
}
/**
* ?????????ֶκ?ȡ???ֶΣ??????????ֶ?
* @return
*/
public int[] getSortFieldsIndex() {
if (ifields == null)
return null;
if (opt == null || (opt != null && opt.indexOf('s') == -1))
return null;
String[] ifields = this.ifields;
String[] fields = this.fields;
int len = ifields.length;
int indexs[] = new int[len];
int flen = fields.length;
int count = 0;
for (int i = 0; i < len; i++) {
boolean find = false;
for (int j = 0; j < flen; j++) {
if (ifields[i].equals(fields[j])) {
indexs[i] = j;
find = true;
break;
}
}
if (!find) {
break;
}
count++;
}
if (count == 0) {
return null;
} else if (count > 0 && count < len) {
//?????ҵ?
int indexs2[] = new int[count];
for (int i = 0; i < count; i++) {
indexs2[i] = indexs[i];
}
indexs = indexs2;
}
return indexs;
}
/**
* ת?ɶ?·?α?
* @param segCount
* @return
*/
public ICursor toMultiCursor(int segCount) {
ICursor curArr[] = new ICursor[segCount];
if (isRealValue) {
int size = posCount;//??????
int minSize = fcount + 1;
int temp = size / segCount;
if (temp == 0) {
temp = 1;
}
int offset = 0;
for(int i = 0; i < segCount; i++) {
int num;//????????
if (temp <= size) {
num = temp;
} else {
num = size;
}
size -= num;
if (num == 0) {
curArr[i] = new IndexCursor(table, fields, ifields, null, opt, ctx);
} else {
int len = num * minSize;
Object vals[] = new Object[len];
System.arraycopy(values, offset, vals, 0, len);
offset += len;
curArr[i] = new IndexCursor(table, fields, ifields, vals);
}
}
} else if (isRow) {
int size = posCount;//??????
int temp = size / segCount;
if (temp == 0) {
temp = 1;
}
int offset = 0;
for(int i = 0; i < segCount; i++) {
if (offset >= size) {
curArr[i] = new IndexCursor(table, fields, ifields, null, opt, ctx);
} else {
long [][]posArr = new long[temp][];
System.arraycopy(this.posArr, offset, posArr, 0, temp);
IndexCursor cs = new IndexCursor(table, fields, ifields, null, opt, ctx);
cs.posArr = posArr;
cs.posCount = posArr.length;
cs.isSorted = true;
curArr[i] = cs;
offset += temp;
}
}
} else {
int size = posCount;//??????
int temp = size / segCount;
if (temp == 0) {
temp = 1;
}
int offset = 0;
for(int i = 0; i < segCount; i++) {
if (offset >= size) {
curArr[i] = new IndexCursor(table, fields, ifields, null, opt, ctx);
} else {
if (i == segCount - 1) {
temp = size - offset;
}
long []pos = new long[temp];
System.arraycopy(this.pos, offset, pos, 0, temp);
curArr[i] = new IndexCursor(table, fields, ifields, pos, opt, ctx);
offset += temp;
}
}
}
return new MultipathCursors(curArr, ctx);
}
/**
* ??ַ?Ƚ???
* ???صĽ??Ҫ???յ?ַ????
* @author runqian
*
*/
static class PositionsComparator implements Comparator © 2015 - 2024 Weber Informatics LLC | Privacy Policy