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SPL(Structured Process Language) A programming language specially for structured data computing.
package com.scudata.dw;
import java.io.IOException;
import com.scudata.common.MessageManager;
import com.scudata.common.RQException;
import com.scudata.array.LongArray;
import com.scudata.dm.ObjectReader;
import com.scudata.dm.ObjectWriter;
import com.scudata.dm.Sequence;
import com.scudata.resources.EngineMessage;
// ?ֶ?Ԫ????
public class ColumnMetaData {
protected ComTable groupTable;
private String colName; // ????????#??ͷ??ʾά???????а?#ȥ??
private boolean isDim; // ?Ƿ?ά?ֶε?һ???֣????????ֶ?
private boolean isKey; // ?Ƿ?????????һ????
// ?ѷ???
private int serialBytesLen = 0; // ???????0??Ϊ?źż?
private BlockLink dataBlockLink; // ?п???????
private BlockLink segmentBlockLink; // ?ֶ???Ϣ???????????μ?¼ÿ???п??????λ?ã??????ά?ֶ??ټ?????Сֵ?????ֵ
private transient BlockLinkWriter colWriter;
private transient BlockLinkWriter segmentWriter;
private transient ObjectWriter objectWriter;
private Sequence dict;//?ֵ?汾4????
private Object dictArray;//?ֵ???????ʽ
private boolean hasMaxMinValues;//?汾4????
private int dataType = DataBlockType.EMPTY;//?????????? ?汾5????
public ColumnMetaData() {
}
public ColumnMetaData(ColPhyTable table) {
groupTable = table.groupTable;
dataBlockLink = new BlockLink(groupTable);
segmentBlockLink = new BlockLink(groupTable);
dict = new Sequence();
}
public ColumnMetaData(ColPhyTable table, ColumnMetaData src) {
this(table);
colName = src.colName;
isDim = src.isDim;
isKey = src.isKey;
hasMaxMinValues = src.hasMaxMinValues;
serialBytesLen = src.serialBytesLen;
}
public ColumnMetaData(ColumnMetaData src) {
groupTable = src.groupTable;
dataBlockLink = src.dataBlockLink;
segmentBlockLink = src.segmentBlockLink;
colName = src.colName;
isDim = src.isDim;
isKey = src.isKey;
serialBytesLen = src.serialBytesLen;
}
/**
* ?????ж???
* @param table ?????ı?
* @param name ????
* @param isDim ?Ƿ?ά?ֶε?һ???֣????????ֶ?
* @param isKey ?Ƿ?????????һ????
*/
public ColumnMetaData(ColPhyTable table, String name, boolean isDim, boolean isKey) {
this(table);
this.colName = name;
this.isDim = isDim;
this.isKey = isKey;
hasMaxMinValues = true;
}
public ColumnMetaData(ColPhyTable table, String name, int serialBytesLen) throws IOException {
this(table);
if (name.startsWith("#")) {
colName = name.substring(1);
isDim = true;
} else {
colName = name;
isDim = false;
}
this.serialBytesLen = serialBytesLen;
hasMaxMinValues = true;
}
public boolean isSerialBytes() {
return serialBytesLen > 0;
}
public int getSerialBytesLen() {
return serialBytesLen;
}
public String getColName() {
return colName;
}
public void setColName(String colName) {
this.colName = colName;
}
/**
* ?????ֶ??Ƿ???ά??һ???֣????????ֶΣ?
* @return
*/
public boolean isDim() {
return isDim;
}
/**
* ?????ֶ??Ƿ?????????һ????
* @return
*/
public boolean isKey() {
return isKey;
}
void applyDataFirstBlock() throws IOException {
if (dataBlockLink.isEmpty()) {
dataBlockLink.setFirstBlockPos(groupTable.applyNewBlock());
}
}
void applySegmentFirstBlock() throws IOException {
if (dataBlockLink.isEmpty()) {
segmentBlockLink.setFirstBlockPos(groupTable.applyNewBlock());
}
}
public boolean isColumn(String name) {
return colName.equals(name);
}
public void readExternal(BufferReader reader, byte version) throws IOException {
colName = reader.readUTF();
isDim = reader.readBoolean();
serialBytesLen = reader.readInt();
dataBlockLink.readExternal(reader);
segmentBlockLink.readExternal(reader);
if (version > 0) {
isKey = reader.readBoolean();
} else {
isKey = isDim;
}
hasMaxMinValues = isDim;
if (version > 3) {
dict = (Sequence) reader.readObject();
if (dict == null) {
dict = new Sequence();
}
hasMaxMinValues = true;
}
if (version > 4) {
reader.readInt();//reserve
dataType = reader.readInt();
initDictArray();
} else {
dataType = DataBlockType.EMPTY;
}
}
public void writeExternal(BufferWriter writer) throws IOException {
writer.writeUTF(colName);
writer.writeBoolean(isDim);
writer.writeInt(serialBytesLen);
dataBlockLink.writeExternal(writer);
segmentBlockLink.writeExternal(writer);
writer.writeBoolean(isKey); // ?汾1????
// ?汾4????
Sequence dict = this.dict;
if (dict != null && dict.length() == 0) {
dict = null;
}
writer.flush();
writer.writeObject(dict);
writer.flush();
// ?汾5????
writer.writeInt(0);
writer.writeInt(dataType);
}
public void prepareWrite() throws IOException {
colWriter = new BlockLinkWriter(dataBlockLink, true);
segmentWriter = new BlockLinkWriter(segmentBlockLink, true);
objectWriter = new ObjectWriter(segmentWriter, groupTable.getBlockSize() - ComTable.POS_SIZE);
}
public void finishWrite() throws IOException {
colWriter.finishWrite();
colWriter = null;
objectWriter.flush();
segmentWriter.finishWrite();
segmentWriter = null;
objectWriter = null;
}
// ??һ???п飬ͬʱ??Ҫ?ķֶ???Ϣ??????
public void appendColBlock(byte []bytes) throws IOException {
long pos = colWriter.writeDataBlock(bytes);
objectWriter.writeLong40(pos);
}
// ??һ??ά?п飬ͬʱ??Ҫ?ķֶ???Ϣ??????
public void appendColBlock(byte []bytes, Object minValue, Object maxValue, Object startValue) throws IOException {
long pos = colWriter.writeDataBlock(bytes);
objectWriter.writeLong40(pos);
objectWriter.writeObject(minValue);
objectWriter.writeObject(maxValue);
objectWriter.writeObject(startValue);
}
public void copyColBlock(BlockLinkReader colReader, ObjectReader segmentReader) throws IOException {
byte[] data = colReader.readDataBlock0();
long pos = colWriter.writeDataBlock0(data);
segmentReader.readLong40();
objectWriter.writeLong40(pos);
if (hasMaxMinValues()) {
objectWriter.writeObject(segmentReader.readObject());
objectWriter.writeObject(segmentReader.readObject());
objectWriter.writeObject(segmentReader.readObject());
}
}
public void copyColBlock(BlockLinkReader colReader, ObjectReader segmentReader,
BufferWriter bufferWriter,byte[] dict) throws IOException {
byte[] data = colReader.readDataBlock();
if (data[0] == DataBlockType.DICT && data[1] == DataBlockType.DICT_PUBLIC) {
int len = data.length - 2;
bufferWriter.reset();
bufferWriter.write(DataBlockType.DICT);
bufferWriter.write(DataBlockType.DICT_PRIVATE);
bufferWriter.write(dict);
bufferWriter.write(data, 2, len);
data = bufferWriter.finish();
}
long pos = colWriter.writeDataBlock(data);
segmentReader.readLong40();
objectWriter.writeLong40(pos);
if (hasMaxMinValues()) {
objectWriter.writeObject(segmentReader.readObject());
objectWriter.writeObject(segmentReader.readObject());
objectWriter.writeObject(segmentReader.readObject());
}
}
public BlockLinkReader getColReader(boolean isLoadFirstBlock) {
BlockLinkReader reader = new BlockLinkReader(dataBlockLink, serialBytesLen);
reader.setDecompressBufferSize(4096);
if (isLoadFirstBlock) {
try {
reader.loadFirstBlock();
} catch (IOException e) {
throw new RQException(e.getMessage(), e);
}
}
reader.setDict(dict);
return reader;
}
public ObjectReader getSegmentReader() {
BlockLinkReader segmentReader = new BlockLinkReader(segmentBlockLink);
try {
segmentReader.loadFirstBlock();
return new ObjectReader(segmentReader, groupTable.getBlockSize() - ComTable.POS_SIZE);
} catch (IOException e) {
segmentReader.close();
throw new RQException(e.getMessage(), e);
}
}
/**
* ȡ?п????????
* @return
*/
public BufferWriter getColDataBufferWriter() {
return new BufferWriter(groupTable.getStructManager());
}
/**
* ?ѵ?ǰcolumn???blockLink??Ϣ??䵽info??????
* @param info
*/
public void getBlockLinkInfo(LongArray info) {
info.add(segmentBlockLink.firstBlockPos);
info.add(segmentBlockLink.lastBlockPos);
info.add(segmentBlockLink.freeIndex);
info.add(segmentBlockLink.blockCount);
info.add(dataBlockLink.firstBlockPos);
info.add(dataBlockLink.lastBlockPos);
info.add(dataBlockLink.freeIndex);
info.add(dataBlockLink.blockCount);
}
public BlockLink getSegmentBlockLink() {
return segmentBlockLink;
}
public BlockLink getDataBlockLink() {
return dataBlockLink;
}
public Sequence getDict() {
return dict;
}
public void setDict(Sequence dict) {
this.dict = dict;
}
public boolean hasMaxMinValues() {
return hasMaxMinValues;
}
public int getDataType() {
return dataType;
}
public void setDataType(int dataType) {
this.dataType = dataType;
}
public String getDataLen() {
return DataBlockType.getTypeLen(dataType);
}
/**
* ?????µ???????????
* @param dataType
* @param checkDataPure ????????Ƿ?
*/
public void adjustDataType(int newType, boolean checkDataPure) {
if (checkDataPure) {
if (!checkDataPure(newType)) {
MessageManager mm = EngineMessage.get();
throw new RQException(mm.getMessage("pdm.arrayTypeError",
DataBlockType.getTypeName(dataType), DataBlockType.getTypeName(newType)));
}
}
int curType = dataType;
if (curType == newType || newType == DataBlockType.NULL) {
return;
}
if (curType == DataBlockType.STRING && newType == DataBlockType.STRING_ASSIC) {
return;
}
if (newType == DataBlockType.STRING && curType == DataBlockType.STRING_ASSIC) {
return;
}
switch (curType) {
case DataBlockType.EMPTY:
dataType = newType;
break;
case DataBlockType.OBJECT:
break;
case DataBlockType.RECORD:
case DataBlockType.DATE:
case DataBlockType.DECIMAL:
case DataBlockType.STRING:
dataType = DataBlockType.OBJECT;//????Ϊ????????
break;
case DataBlockType.SEQUENCE:
if (newType != DataBlockType.TABLE)
dataType = DataBlockType.OBJECT;
break;
case DataBlockType.TABLE:
if (newType == DataBlockType.SEQUENCE)
dataType = DataBlockType.SEQUENCE;//????ΪSEQUENCE
else
dataType = DataBlockType.OBJECT;
break;
case DataBlockType.INT:
case DataBlockType.INT8:
case DataBlockType.INT16:
case DataBlockType.INT32:
if ((newType & 0xF0) == DataBlockType.INT) {
dataType = DataBlockType.INT;
} else {
dataType = DataBlockType.OBJECT;
}
break;
case DataBlockType.LONG:
case DataBlockType.LONG8:
case DataBlockType.LONG16:
case DataBlockType.LONG32:
case DataBlockType.LONG64:
if ((newType & 0xF0) == DataBlockType.LONG) {
dataType = DataBlockType.LONG;
} else {
dataType = DataBlockType.OBJECT;
}
break;
case DataBlockType.DOUBLE:
if (newType == DataBlockType.DOUBLE64) {
dataType = DataBlockType.DOUBLE;
} else {
dataType = DataBlockType.OBJECT;
}
break;
case DataBlockType.DOUBLE64:
if (newType == DataBlockType.DOUBLE) {
dataType = DataBlockType.DOUBLE;
} else {
dataType = DataBlockType.OBJECT;
}
break;
default:
dataType = DataBlockType.OBJECT;
}
}
/**
* ?????µ??????????Ƿ?
* @param newType
* @return true: ???ݴ?, false:???ݲ???
*/
private boolean checkDataPure(int newType) {
int curType = dataType;
if (curType == newType || newType == DataBlockType.NULL) {
return true;
}
switch (curType) {
case DataBlockType.EMPTY:
break;
case DataBlockType.OBJECT:
break;
case DataBlockType.RECORD:
case DataBlockType.DATE:
case DataBlockType.DECIMAL:
case DataBlockType.STRING:
return false;
case DataBlockType.SEQUENCE:
if (newType != DataBlockType.TABLE)
return false;
case DataBlockType.TABLE:
if (newType == DataBlockType.SEQUENCE)
return false;
break;
case DataBlockType.INT:
case DataBlockType.INT8:
case DataBlockType.INT16:
case DataBlockType.INT32:
if ((newType & 0xF0) == DataBlockType.INT) {
break;
} else {
return false;
}
case DataBlockType.LONG:
case DataBlockType.LONG8:
case DataBlockType.LONG16:
case DataBlockType.LONG32:
case DataBlockType.LONG64:
if ((newType & 0xF0) == DataBlockType.LONG) {
break;
} else {
return false;
}
case DataBlockType.DOUBLE:
if (newType == DataBlockType.DOUBLE64) {
break;
} else {
return false;
}
case DataBlockType.DOUBLE64:
if (newType == DataBlockType.DOUBLE) {
break;
} else {
return false;
}
default:
return false;
}
return true;
}
public Object getDictArray() {
return dictArray;
}
public void initDictArray() {
if (dict == null || dict.length() == 0) return;
dictArray = DataBlockType.dictToArray(dict, this.dataType);
}
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