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com.scudata.expression.mfn.cursor.Groupx Maven / Gradle / Ivy
SPL(Structured Process Language) A programming language specially for structured data computing.
package com.scudata.expression.mfn.cursor;
import java.util.ArrayList;
import com.scudata.common.MessageManager;
import com.scudata.common.RQException;
import com.scudata.dm.Context;
import com.scudata.dm.cursor.ICursor;
import com.scudata.dm.op.New;
import com.scudata.expression.CursorFunction;
import com.scudata.expression.Expression;
import com.scudata.expression.Gather;
import com.scudata.expression.IParam;
import com.scudata.expression.ParamInfo2;
import com.scudata.resources.EngineMessage;
import com.scudata.util.CursorUtil;
import com.scudata.util.EnvUtil;
/**
* ?????ۼƷ?ʽ???α????????????ܣ????س??α?
* cs.groupx(x:F,??;y:G??;n)
* @author RunQian
*
*/
public class Groupx extends CursorFunction {
public Object calculate(Context ctx) {
if (param == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("groupx" + mm.getMessage("function.missingParam"));
}
ArrayList gathers = new ArrayList(); // ͳ?ƾۺϺ???
ArrayList poss = new ArrayList(); // ???????ʽ????Ӧ?ۺϺ????б??ĵڼ????ۺϺ???
IParam sub0;
IParam sub1 = null;
IParam sub2 = null;
if (param.getType() == IParam.Semicolon) {
int size = param.getSubSize();
if (size > 3) {
MessageManager mm = EngineMessage.get();
throw new RQException("groupx" + mm.getMessage("function.invalidParam"));
}
sub0 = param.getSub(0);
if (sub0 == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("groupx" + mm.getMessage("function.invalidParam"));
}
sub1 = param.getSub(1);
if (size > 2) {
sub2 = param.getSub(2);
}
} else {
sub0 = param;
}
Expression []exps;
String []names = null;
Expression []newExps = null;
String []newNames = null;
ParamInfo2 pi0 = ParamInfo2.parse(sub0, "groupx", true, false);
exps = pi0.getExpressions1();
names = pi0.getExpressionStrs2();
if (sub1 != null) {
ParamInfo2 pi1 = ParamInfo2.parse(sub1, "groupx", true, false);
newExps = pi1.getExpressions1();
newNames = pi1.getExpressionStrs2();
}
double n = -1;
Expression gexp = null;
if (sub2 == null) {
} else if (sub2.isLeaf()) {
Object obj;
if (option == null || option.indexOf('g') == -1) {
obj = sub2.getLeafExpression().calculate(ctx);
if (obj instanceof Number) {
n = ((Number)obj).doubleValue();
} else {
MessageManager mm = EngineMessage.get();
throw new RQException("groupx" + mm.getMessage("function.paramTypeError"));
}
} else {
gexp = sub2.getLeafExpression();
}
} else {
MessageManager mm = EngineMessage.get();
throw new RQException("groupx" + mm.getMessage("function.invalidParam"));
}
// ???????ʽ?;ۺϱ???ʽ?ij???
int nlen = null == newExps ? 0 : newExps.length;
int elen = null == exps ? 0 : exps.length;
// ????????ʽ?еľۺϺ???
for (int i = 0; i < nlen; i++) {
int size = gathers.size();
gathers.addAll(Expression.getSpecFunc(newExps[i], Gather.class));
if (size == gathers.size())
gathers.add(newExps[i]);
poss.add(gathers.size());
}
// ?????м?ۺϱ???ʽ
Expression[] tempExps = new Expression[gathers.size()];
String[] tempNames = newNames;
for (int i = 0; i < tempExps.length; i++) {
Object obj = gathers.get(i);
if (obj instanceof Gather) {
Gather gather = (Gather)gathers.get(i);
tempExps[i] = new Expression(cs, ctx, gather.getFunctionString());
} else {
tempExps[i] = (Expression)gathers.get(i);
}
}
// new ?α?ı???ʽ
Expression[] senExps = new Expression[elen+nlen];
String strExp = null; // ?ϱ???ʽ?ַ?????
int index = 0; // ?ϱ???ʽ??????
New op = null; // ???ӵ?new??????
// ?????ϱ???ʽ??ת??Ϊ?µ?new??ͳ???б???ʽ
boolean exCal = false; // ?ж??Ƿ??־ۺϱ???ʽ
if (null != newExps) {
strExp = newExps[index].toString();
}
for (int i = 0; i < tempExps.length; i++) {
if (i >= poss.get(index)) {
senExps[index+elen] = new Expression(cs, ctx, strExp);
index++;
strExp = newExps[index].toString();
}
String funStr = "#" + (i+elen+1);
strExp = Expression.replaceFunc(strExp, tempExps[i].toString(), funStr);
if (!strExp.equals(funStr)) {
exCal = true;
}
}
// @b???????ȥ???????ֶ?
boolean bopt = option != null && option.indexOf('b') != -1;
if (exCal) {
tempNames = null;
// ??д???????ʽ
for (int i = 1; i <= elen; i++) {
String funStr = "#" + i;
senExps[i-1] = new Expression(cs, ctx, funStr);
}
if (senExps.length > 0) // ???һ??????ʽ??????
senExps[index+elen] = new Expression(cs, ctx, strExp);
// ????ͳһ??????
String[] senNames = new String[names.length + newNames.length];
for (int i = 0; i < names.length; i++) {
senNames[i] = names[i];
}
for (int i = 0; i < newNames.length; i++) {
if (null == newNames[i]) {
senNames[i+names.length] = newExps[i].toString();
} else
senNames[i+names.length] = newNames[i];
}
// ????new??????
if (bopt) {
Expression []alterExps = new Expression[nlen];
String []alterNames = new String[nlen];
System.arraycopy(senExps, elen, alterExps, 0, nlen);
System.arraycopy(senNames, elen, alterNames, 0, nlen);
op = new New(this, alterExps, alterNames, null);
} else {
op = new New(this, senExps, senNames, null);
}
} else if (bopt) {
Expression []alterExps = new Expression[nlen];
for (int i = 0, q = elen + 1; i < nlen; ++i, ++q) {
alterExps[i] = new Expression(ctx, "#" + q);
}
op = new New(this, alterExps, new String[nlen], null);
}
int capacity;
if (n > 1) {
capacity = (int)n;
} else {
int fcount = exps == null ? 0 : exps.length;
if (newExps != null) fcount += newExps.length;
capacity = EnvUtil.getCapacity(fcount);
if (n > 0) {
capacity *= n;
}
}
ICursor result;
if (gexp != null) {
result = CursorUtil.groupx_g(cursor, gexp, exps, names, tempExps, tempNames, option, ctx);
} else {
result = cursor.groupx(exps, names, tempExps, tempNames, option, ctx, capacity);
}
if (op != null) {
result.addOperation(op, ctx);
}
return result;
}
}
