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SPL(Structured Process Language) A programming language specially for structured data computing.
package com.scudata.expression.fn;
import com.scudata.common.MessageManager;
import com.scudata.common.RQException;
import com.scudata.dm.Context;
import com.scudata.dm.Sequence;
import com.scudata.dm.cursor.ICursor;
import com.scudata.dm.cursor.JoinxCursor_u;
import com.scudata.dm.cursor.MemoryCursor;
import com.scudata.dw.pseudo.IPseudo;
import com.scudata.dw.pseudo.PseudoJoinx;
import com.scudata.expression.Expression;
import com.scudata.expression.Function;
import com.scudata.expression.IParam;
import com.scudata.expression.Node;
import com.scudata.resources.EngineMessage;
import com.scudata.util.CursorUtil;
/**
* ?????α??Ӧ?????
* joinx(csi:Fi,xj,..;??)
* ????????α?csi?Ľ????ʹ?ù鲢?????㣬???????α꣬xj????ȫʡ????ʹ??????????. ??xj????û??????ʹ??xj??ֵ???ӡ?
* ֧?ֶ?·?α꣬??ʱ????·????ͬ??csiҲ???????????
* @author runqian
*
*/
public class Joinx extends Function {
public Node optimize(Context ctx) {
param.optimize(ctx);
return this;
}
/**
* ??????ʽ????Ч?ԣ???Ч???׳??쳣
*/
public void checkValidity() {
if (param == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.missingParam"));
} else if (param.getType() != IParam.Semicolon) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.invalidParam"));
}
}
private Object joinx_u(Context ctx) {
int count = param.getSubSize();
Object []objs = new Object[count];
String []names = new String[count];
Expression [][]exps = new Expression[count][];
for (int i = 0; i < count; ++i) {
// csi:Fi,xj,..
IParam sub = param.getSub(i);
IParam cursorParam;
if (sub == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.invalidParam"));
} else if (sub.getType() == IParam.Comma) {
cursorParam = sub.getSub(0);
if (cursorParam == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.invalidParam"));
}
int expCount = sub.getSubSize() - 1;
if (i != 0 && expCount != exps[0].length) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.paramCountNotMatch"));
}
Expression []curExps = new Expression[expCount];
exps[i] = curExps;
for (int p = 0; p < expCount; ++p) {
IParam expParam = sub.getSub(p + 1);
if (expParam == null || !expParam.isLeaf()) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.invalidParam"));
}
curExps[p] = expParam.getLeafExpression();
}
} else {
cursorParam = sub;
}
if (cursorParam.isLeaf()) {
Object obj = cursorParam.getLeafExpression().calculate(ctx);
if (i == 0) {
if (!(obj instanceof ICursor)) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.paramTypeError"));
}
} else {
if (!(obj instanceof Sequence)) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.paramTypeError"));
}
}
objs[i] = obj;
} else {
if (cursorParam.getSubSize() != 2) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.invalidParam"));
}
IParam sub0 = cursorParam.getSub(0);
if (sub0 == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.invalidParam"));
}
Object obj = sub0.getLeafExpression().calculate(ctx);
if (i == 0) {
if (!(obj instanceof ICursor)) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.paramTypeError"));
}
} else {
if (!(obj instanceof Sequence)) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.paramTypeError"));
}
}
objs[i] = obj;
IParam sub1 = cursorParam.getSub(1);
if (sub1 != null) {
names[i] = sub1.getLeafExpression().getIdentifierName();
}
}
}
return new JoinxCursor_u(objs, exps, names, option, ctx);
}
public Object calculate(Context ctx) {
if (option != null && option.indexOf('u') != -1) {
return joinx_u(ctx);
}
boolean isJoin = option == null || option.indexOf('p') == -1;
int count = param.getSubSize();
ICursor []cursors = new ICursor[count];
IPseudo []pseudos = new IPseudo[count];
String []names = new String[count];
Expression [][]exps = new Expression[count][];
for (int i = 0; i < count; ++i) {
// csi:Fi,xj,..
IParam sub = param.getSub(i);
IParam cursorParam;
if (sub == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.invalidParam"));
} else if (sub.getType() == IParam.Comma) {
cursorParam = sub.getSub(0);
if (cursorParam == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.invalidParam"));
}
int expCount = sub.getSubSize() - 1;
if (isJoin && i != 0 && expCount != exps[0].length) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.paramCountNotMatch"));
}
Expression []curExps = new Expression[expCount];
exps[i] = curExps;
for (int p = 0; p < expCount; ++p) {
IParam expParam = sub.getSub(p + 1);
if (expParam == null || !expParam.isLeaf()) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.invalidParam"));
}
curExps[p] = expParam.getLeafExpression();
}
} else {
cursorParam = sub;
if (isJoin) {
Expression exp = new Expression("~.v()");
Expression []curExps = new Expression[]{exp};
exps[i] = curExps;
}
}
if (cursorParam.isLeaf()) {
Expression exp = cursorParam.getLeafExpression();
names[i] = exp.getIdentifierName();
Object obj = exp.calculate(ctx);
if (obj instanceof ICursor) {
cursors[i] = (ICursor)obj;
} else if (obj instanceof Sequence) {
cursors[i] = new MemoryCursor((Sequence)obj);
} else if (obj instanceof IPseudo) {
pseudos[i] = (IPseudo) obj;
} else if (obj == null) {
cursors[i] = new MemoryCursor(null);
} else {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.paramTypeError"));
}
} else {
if (cursorParam.getSubSize() != 2) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.invalidParam"));
}
IParam sub0 = cursorParam.getSub(0);
if (sub0 == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.invalidParam"));
}
Expression exp = sub0.getLeafExpression();
Object obj = exp.calculate(ctx);
if (obj instanceof ICursor) {
cursors[i] = (ICursor)obj;
} else if (obj instanceof Sequence) {
cursors[i] = new MemoryCursor((Sequence)obj);
} else if (obj instanceof IPseudo) {
pseudos[i] = (IPseudo) obj;
} else if (obj == null) {
cursors[i] = new MemoryCursor(null);
} else {
MessageManager mm = EngineMessage.get();
throw new RQException("joinx" + mm.getMessage("function.paramTypeError"));
}
IParam sub1 = cursorParam.getSub(1);
if (sub1 != null) {
names[i] = sub1.getLeafExpression().getIdentifierName();
} else {
names[i] = exp.getIdentifierName();
}
}
}
if (pseudos[0] != null) {
// if (pseudos[0] instanceof ClusterPseudo) {
// ClusterPseudo cps [] = new ClusterPseudo[count];
// for (int i = 0; i < count; i++) {
// cps[i] = (ClusterPseudo) pseudos[i];
// }
// return ClusterPseudo.joinx(cps, exps, names, option, ctx);
// } else {
return new PseudoJoinx(pseudos, exps, names, option);
// }
} else {
return CursorUtil.joinx(cursors, names, exps, option, ctx);
}
}
}