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SPL(Structured Process Language) A programming language specially for structured data computing.
package com.scudata.dw.pseudo;
import java.util.ArrayList;
import java.util.List;
import com.scudata.common.MessageManager;
import com.scudata.common.RQException;
import com.scudata.dm.BaseRecord;
import com.scudata.dm.Context;
import com.scudata.dm.DataStruct;
import com.scudata.dm.IndexTable;
import com.scudata.dm.Sequence;
import com.scudata.dm.cursor.ICursor;
import com.scudata.dm.op.Operable;
import com.scudata.dm.op.Operation;
import com.scudata.dm.op.Select;
import com.scudata.dm.op.Switch;
import com.scudata.expression.Expression;
import com.scudata.expression.operator.And;
import com.scudata.resources.EngineMessage;
import com.scudata.util.Variant;
public class Pseudo extends IPseudo {
protected PseudoDefination pd;//ʵ???Ķ???
protected Sequence cache = null;//??import?Ľ????cache
//?????α???Ҫ?IJ???
protected String []names;
protected Expression []exps;
protected Context ctx;
protected ArrayList opList;
protected Expression filter;
protected ArrayList fkNameList;
protected ArrayList codeList;
protected ArrayList optList;
protected ArrayList extraNameList;//??Ϊ???˻?α?ֶζ???Ҫ????ȡ?????ֶ???
protected ArrayList allNameList;//ʵ?????????ֶ?
protected String []deriveNames;//??derive???ӵ?
protected Expression []deriveExps;
public void addColName(String name) {
throw new RQException("never run to here");
}
public void addPKeyNames() {
throw new RQException("never run to here");
}
public Operable addOperation(Operation op, Context ctx) {
IPseudo newObj = null;
try {
newObj = (IPseudo) ((IPseudo)this).clone(ctx);
((Pseudo) newObj).addOpt(op, ctx);
} catch (CloneNotSupportedException e) {
throw new RQException(e);
}
return (Operable) newObj;
}
public void addOpt(Operation op, Context ctx) {
if (opList == null) {
opList = new ArrayList();
}
if (op != null) {
ArrayList tempList = new ArrayList();
new Expression(op.getFunction()).getUsedFields(ctx, tempList);
boolean isBFile = pd.isBFile();
if (!isBFile && op instanceof Select && op.getFunction() != null) {
Expression exp = ((Select)op).getFilterExpression();
boolean flag = true;//true??ʾ???DZ??????ֶΡ? ????news??new??derive
for (String name : tempList) {
if (!isColumn(name)) {
flag = false;
break;
}
}
if (flag) {
if (filter == null) {
filter = exp;
} else {
And and = new And();
and.setLeft(filter.getHome());
and.setRight(exp.getHome());
filter = new Expression(and);
}
} else {
for (String name : tempList) {
addColName(name);
}
opList.add(op);
}
} else if (!isBFile && op instanceof Switch && ((Switch) op).isIsect()) {
//??switch@iת??ΪF:K
//ת???????????ֶΡ??????ֶδ?????????????code??????????codeû????????
String names[] = ((Switch) op).getFkNames();
Sequence codes[] = ((Switch) op).getCodes();
//????Ƿ?????????????
boolean flag = true;
while (true) {
if (1 != names.length) break;//???ǵ??ֶ?
String keyName;
if (((Switch) op).getExps()[0] == null) {
keyName = codes[0].dataStruct().getPrimary()[0];
} else {
keyName = ((Switch) op).getExps()[0].getIdentifierName();
}
Object obj = codes[0].ifn();
if (obj instanceof BaseRecord) {
DataStruct ds = ((BaseRecord)obj).dataStruct();
if (-1 == ds.getFieldIndex(keyName)) {
//code?ﲻ???ڸ??ֶ?
MessageManager mm = EngineMessage.get();
throw new RQException(keyName + mm.getMessage("ds.fieldNotExist"));
}
int []fields = ds.getPKIndex();
if (fields == null) {
break;//??????????
} else {
if (! ds.getPrimary()[0].equals(keyName)) {
break;//???ֶβ???code??????
}
}
} else {
MessageManager mm = EngineMessage.get();
throw new RQException(mm.getMessage("engine.needPmt"));
}
IndexTable it = codes[0].getIndexTable();
if (it != null) {
break;//??????????Ҳ??ת??
}
flag = false;
if (codeList == null) {
codeList = new ArrayList();
}
if (fkNameList == null) {
fkNameList = new ArrayList();
}
for (String name : names) {
fkNameList.add(name);
}
for (Sequence seq : codes) {
codeList.add(seq);
}
break;
}
if (flag) {
//??????ȡΪF:T
for (String name : tempList) {
addColName(name);
}
opList.add(op);
}
} else {
for (String name : tempList) {
addColName(name);
}
opList.add(op);
}
}
this.ctx = ctx;
}
//????news??new??derive
protected void setFetchInfo(ICursor cursor, Expression []exps, String []names) {
if (this.exps != null) return;
if (exps == null && extraNameList.size() == 0) {
//???û??ָ??ȡ???ֶΣ?????????֯
names = cursor.getDataStruct().getFieldNames();
for (String name : names) {
if (!extraNameList.contains(name)) {
extraNameList.add(name);
}
}
int size = extraNameList.size();
names = new String[size];
extraNameList.toArray(names);
exps = new Expression[size];
for (int i = 0; i < size; i++) {
exps[i] = new Expression(names[i]);
}
this.exps = exps;
this.names = names;
} else {
//???ָ????ȡ???ֶΣ?ҲҪ?Ѷ????õ????ֶμ???
//???extraNameList???Ƿ????exps????ֶ?
//????У???ȥ??
ArrayList tempList = new ArrayList();
for (String name : extraNameList) {
if (!tempList.contains(name)) {
tempList.add(name);
}
}
if (exps != null) {
for (Expression exp : exps) {
String expName = exp.getIdentifierName();
if (tempList.contains(expName)) {
tempList.remove(expName);
}
}
}
ArrayList tempNameList = new ArrayList();
ArrayList tempExpList = new ArrayList();
if (exps != null) {
for (Expression exp : exps) {
tempExpList.add(exp);
}
if (names == null) {
for (Expression exp : exps) {
tempNameList.add(exp.getIdentifierName());
}
} else {
for (String name : names) {
tempNameList.add(name);
}
}
}
for (String name : tempList) {
tempExpList.add(new Expression(name));
tempNameList.add(name);
}
int size = tempExpList.size();
this.exps = new Expression[size];
tempExpList.toArray(this.exps);
this.names = new String[size];
tempNameList.toArray(this.names);
}
// //?????derive??????exps??names
// if (deriveExps != null) {
// int oldSize = this.exps.length;
// int newSize = deriveExps.length + oldSize;
//
// Expression []newExps = new Expression[newSize];
// String []newNames = new String[newSize];
// System.arraycopy(this.exps, 0, newExps, 0, oldSize);
// System.arraycopy(deriveExps, 0, newExps, oldSize, deriveExps.length);
// System.arraycopy(this.names, 0, newNames, 0, oldSize);
// System.arraycopy(deriveNames, 0, newNames, oldSize, deriveExps.length);
//
// this.exps = newExps;
// this.names = newNames;
// }
}
public boolean isColumn(String col) {
return allNameList.contains(col);
}
public Context getContext() {
return ctx;
}
public void cloneField(Pseudo obj) {
//obj.table = table;
obj.pd = new PseudoDefination(getPd());
obj.ctx = ctx;
obj.names = names == null ? null : names.clone();
obj.exps = exps == null ? null : exps.clone();
obj.filter = filter == null ? null : filter.newExpression(ctx);
if (opList != null) {
obj.opList = new ArrayList();
for (Operation op : opList) {
obj.opList.add(op.duplicate(ctx));
}
}
if (fkNameList != null) {
obj.fkNameList = new ArrayList();
for (String str : fkNameList) {
obj.fkNameList.add(str);
}
}
if (codeList != null) {
obj.codeList = new ArrayList();
for (Sequence seq : codeList) {
obj.codeList.add(seq);
}
}
if (optList != null) {
obj.optList = new ArrayList();
for (String str : optList) {
obj.optList.add(str);
}
}
if (extraNameList != null) {
obj.extraNameList = new ArrayList();
for (String str : extraNameList) {
obj.extraNameList.add(str);
}
}
if (allNameList != null) {
obj.allNameList = new ArrayList();
for (String str : allNameList) {
obj.allNameList.add(str);
}
}
obj.deriveNames = deriveNames == null ? null : deriveNames.clone();
obj.deriveExps = deriveExps == null ? null : deriveExps.clone();
}
public PseudoDefination getPd() {
return pd;
}
public void append(ICursor cursor, String option) {
throw new RQException("never run to here");
}
public Sequence update(Sequence data, String opt) {
throw new RQException("never run to here");
}
public Sequence delete(Sequence data, String opt) {
throw new RQException("never run to here");
}
public void addColNames(String[] nameArray) {
throw new RQException("never run to here");
}
public ICursor cursor(Expression[] exps, String[] names) {
throw new RQException("never run to here");
}
public ICursor cursor(Expression[] exps, String[] names, boolean isColumn) {
throw new RQException("never run to here");
}
public Object clone(Context ctx) throws CloneNotSupportedException {
throw new RQException("never run to here");
}
public void setCache(Sequence cache) {
this.cache = cache;
}
public Sequence getCache() {
return cache;
}
// ?ж??Ƿ???????ָ?????Ƶ????
public boolean hasForeignKey(String fkName) {
PseudoColumn column = pd.findColumnByName(fkName);
if (column != null && column.getDim() != null)
return true;
else
return false;
}
// ȡ???????
public String[] getPrimaryKey() {
return getPd().getAllSortedColNames();
}
//?????ֶ?????ά??
public PseudoColumn getFieldSwitchColumnByName(String fieldName) {
List columns = pd.getColumns();
if (columns == null) {
return null;
}
for (PseudoColumn column : columns) {
if (column.getDim() != null) {
if (column.getName() != null && column.getName().equals(fieldName)) {
return column;
}
}
}
return null;
}
// ȡ?ֶ?ָ???Column
public PseudoColumn getFieldSwitchColumn(String fieldName) {
List columns = pd.getColumns();
if (columns == null) {
return null;
}
for (PseudoColumn column : columns) {
if (column.getDim() != null) {
if (column.getFkey() == null && column.getName().equals(fieldName)) {
return column;
} else if (column.getFkey() != null
&& column.getFkey().length == 1
&& column.getFkey()[0].equals(fieldName)) {
return column;
}
}
}
return null;
}
public List getFieldSwitchColumns(String[] fieldNames) {
List list = new ArrayList();
if (fieldNames == null) {
List columns = pd.getColumns();
if (columns == null) {
return null;
}
for (PseudoColumn column : columns) {
if (column.getDim() != null) {
list.add(column);
}
}
} else {
for (String fieldName : fieldNames) {
PseudoColumn column = getFieldSwitchColumn(fieldName);
if (column != null) {
list.add(column);
}
}
}
if (list.size() == 0)
return null;
else
return list;
}
// ȡ?ֶ???switchָ???????????û???ؿ?
public Pseudo getFieldSwitchTable(String fieldName) {
List columns = pd.getColumns();
if (columns == null) {
return null;
}
for (PseudoColumn column : columns) {
if (column.getDim() != null) {
if (column.getFkey() == null && column.getName().equals(fieldName)) {
return (PseudoTable) column.getDim();
}
// else if (column.getFkey() != null
// && column.getFkey().length > 0
// && column.getFkey()[0].equals(fieldName)) {
// return (PseudoTable) column.getDim();
// }
}
}
return null;
}
/**
* ???????
* @param fkName ?????
* @param fieldNames ????ֶ?
* @param code ???
* @param clone ????һ???????
* @return
*/
public Pseudo addForeignKeys(String fkName, String []fieldNames, Object code, String[] codeKeys, boolean clone) {
throw new RQException("Never run to here.");
}
public Pseudo setPathCount(int pathCount) {
throw new RQException("Never run to here.");
}
public Pseudo setMcsTable(Pseudo mcsTable) {
throw new RQException("Never run to here.");
}
public Sequence Import(Expression[] exps, String[] names) {
return cursor(exps, names).fetch();
}
/**
* ?ж??Ƿ??????????
* @param fkName
* @param fieldNames
* @param code
* @param codeKeys
* @return
*/
public PseudoColumn isForeignKey(String fkName, String []fieldNames, Object code, String[] codeKeys) {
List columns = pd.getColumns();
if (columns == null) {
return null;
}
for (PseudoColumn column : columns) {
if (column.getDim() != null) {
if (column.getName() != null && column.getName().equals(fkName)) {
return column;
}
if (column.getFkey() != null
&& column.getFkey().length == 1
&& column.getFkey()[0].equals(fkName)) {
return column;
}
if ((column.getFkey() != null)
&& Variant.compareArrays(fieldNames, column.getFkey()) == 0) {
return column;
}
if ((column.getDimKey() != null)
&& Variant.compareArrays(codeKeys, column.getDimKey()) == 0) {
return column;
}
}
}
return null;
}
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