com.scudata.dm.op.MultipathChannel Maven / Gradle / Ivy
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SPL(Structured Process Language) A programming language specially for structured data computing.
package com.scudata.dm.op;
import com.scudata.common.RQException;
import com.scudata.dm.BaseRecord;
import com.scudata.dm.Context;
import com.scudata.dm.FileObject;
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.expression.Expression;
import com.scudata.expression.Function;
/**
* ??·?ܵ????ܵ????Ը??Ӷ??????㣬??ֻ?ܶ???һ?ֽ????????
* @author WangXiaoJun
*
*/
public class MultipathChannel extends Channel {
private Channel []channels;
/**
* ?ɶ?·?α깹????·?ܵ?
* @param ctx ??????????
* @param mcs ??·?α?
*/
public MultipathChannel(Context ctx, MultipathCursors mcs) {
this(ctx, mcs, true);
}
/**
* ?ɶ?·?α깹????·?ܵ?
* @param ctx ??????????
* @param mcs ??·?α?
* @param doPush ?Ƿ???α?????push????
?α????fetch@0??????һ???????ݣ?????ܵ??????㻹û????????α긽??push???ᵼ?»????????û?б??ܵ????????ӵ????????
*/
public MultipathChannel(Context ctx, MultipathCursors mcs, boolean doPush) {
super(ctx);
ICursor []cursors = mcs.getCursors();
int count = cursors.length;
channels = new Channel[count];
for (int i = 0; i < count; ++i) {
channels[i] = cursors[i].newChannel(cursors[i].getContext(), doPush);
}
}
/**
* ???α?????push???ݵ??ܵ??IJ???
* @param cs
*/
public void addPushToCursor(ICursor cs) {
MultipathCursors mcs = (MultipathCursors)cs;
ICursor []cursors = mcs.getCursors();
int count = cursors.length;
for (int i = 0; i < count; ++i) {
Push push = new Push(channels[i]);
cursors[i].addOperation(push, cursors[i].getContext());
}
}
/**
* Ϊ?ܵ?????????
* @param op ????
* @param ctx ??????????
* @return Operable
*/
public Operable addOperation(Operation op, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
channel.addOperation(op.duplicate(ctx), ctx);
}
return this;
}
/**
* ????
* @param function ??Ӧ?ĺ???
* @param fltExp ????????
* @param opt ѡ??
* @param ctx ??????????
* @return Operable
*/
public Operable select(Function function, Expression fltExp, String opt, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression curFilter = Operation.dupExpression(fltExp, ctx);
channel.select(function, curFilter, opt, ctx);
}
return this;
}
/**
* ????
* @param function ??Ӧ?ĺ???
* @param fltExp ????????
* @param opt ѡ??
* @param pipe ???ڴ??????????????ij?Ա
* @param ctx ??????????
* @return Operable
*/
public Operable select(Function function, Expression fltExp, String opt, IPipe pipe, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression curFilter = Operation.dupExpression(fltExp, ctx);
channel.select(function, curFilter, opt, pipe, ctx);
}
return this;
}
/**
* ???????ӹ??ˣ??????ܹ????ϵ?
* @param function ??Ӧ?ĺ???
* @param exps ??ǰ???????ֶα???ʽ????
* @param codes ά??????
* @param dataExps ά???????ֶα???ʽ????
* @param opt ѡ??
* @param ctx ??????????
* @return Operable
*/
public Operable filterJoin(Function function, Expression[][] exps, Sequence[] codes, Expression[][] dataExps, String opt, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression [][]curExps = Operation.dupExpressions(exps, ctx);
Expression [][]curDataExps = Operation.dupExpressions(dataExps, ctx);
channel.filterJoin(function, curExps, codes, curDataExps, opt, ctx);
}
return this;
}
/**
* ???????ӹ??ˣ??????ܹ??????ϵ?
* @param function ??Ӧ?ĺ???
* @param exps ??ǰ???????ֶα???ʽ????
* @param codes ά??????
* @param dataExps ά???????ֶα???ʽ????
* @param opt ѡ??
* @param ctx ??????????
* @return Operable
*/
public Operable diffJoin(Function function, Expression[][] exps, Sequence[] codes, Expression[][] dataExps, String opt, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression [][]curExps = Operation.dupExpressions(exps, ctx);
Expression [][]curDataExps = Operation.dupExpressions(dataExps, ctx);
channel.diffJoin(function, curExps, codes, curDataExps, opt, ctx);
}
return this;
}
/**
* ??????
* @param function ??Ӧ?ĺ???
* @param fname
* @param exps ??ǰ???????ֶα???ʽ????
* @param codes ά??????
* @param dataExps ά???????ֶα???ʽ????
* @param newExps
* @param newNames
* @param opt ѡ??
* @param ctx ??????????
* @return Operable
*/
public Operable join(Function function, String fname, Expression[][] exps, Sequence[] codes,
Expression[][] dataExps, Expression[][] newExps, String[][] newNames, String opt, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression [][]curExps = Operation.dupExpressions(exps, ctx);
Expression [][]curDataExps = Operation.dupExpressions(dataExps, ctx);
Expression [][]curNewExps = Operation.dupExpressions(newExps, ctx);
channel.join(function, fname, curExps, codes, curDataExps, curNewExps, newNames, opt, ctx);
}
return this;
}
/**
* ??Զ?̱???????
* @param function ??Ӧ?ĺ???
* @param fname
* @param exps ??ǰ???????ֶα???ʽ????
* @param codes ά??????
* @param dataExps ά???????ֶα???ʽ????
* @param newExps
* @param newNames
* @param opt ѡ??
* @param ctx ??????????
* @return Operable
*/
public Operable joinRemote(Function function, String fname, Expression[][] exps,
Object[] codes, Expression[][] dataExps,
Expression[][] newExps, String[][] newNames, String opt, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression [][]curExps = Operation.dupExpressions(exps, ctx);
Expression [][]curDataExps = Operation.dupExpressions(dataExps, ctx);
Expression [][]curNewExps = Operation.dupExpressions(newExps, ctx);
channel.joinRemote(function, fname, curExps, codes, curDataExps, curNewExps, newNames, opt, ctx);
}
return this;
}
/**
* ?????ʽ????
* @param function
* @param dimExps ???ӱ???ʽ????
* @param aliasNames ά????¼????
* @param newExps ?²????ֶα???ʽ????
* @param newNames ?²????ֶ???????
* @param opt ѡ?i??????????
* @param ctx
* @return
*/
public Operable fjoin(Function function, Expression[] dimExps, String []aliasNames,
Expression[][] newExps, String[][] newNames, String opt, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression []curDimExps = Operation.dupExpressions(dimExps, ctx);
Expression [][]curNewExps = Operation.dupExpressions(newExps, ctx);
channel.fjoin(function, curDimExps, aliasNames, curNewExps, newNames, opt, ctx);
}
return this;
}
/**
* ???Ӽ?????
* @param function ??Ӧ?ĺ???
* @param exps ???????ʽ????
* @param names ?ֶ???????
* @param opt ѡ??
* @param level
* @param ctx ??????????
* @return Operable
*/
public Operable derive(Function function, Expression []exps, String []names, String opt, int level, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression []curExps = Operation.dupExpressions(exps, ctx);
channel.derive(function, curExps, names, opt, level, ctx);
}
return this;
}
/**
* ?????????
* @param function ??Ӧ?ĺ???
* @param newExps ???????ʽ????
* @param names ?ֶ???????
* @param opt ѡ??
* @param ctx ??????????
* @return Operable
*/
public Operable newTable(Function function, Expression []newExps, String []names, String opt, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression []curExps = Operation.dupExpressions(newExps, ctx);
channel.newTable(function, curExps, names, opt, ctx);
}
return this;
}
/**
* ???????????????
* @param function ??Ӧ?ĺ???
* @param exps ???????ʽ????
* @param opt ѡ??
* @param ctx ??????????
* @return Operable
*/
public Operable group(Function function, Expression []exps, String opt, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression []curExps = Operation.dupExpressions(exps, ctx);
channel.group(function, curExps, opt, ctx);
}
return this;
}
/**
* ???????????????
* @param function ??Ӧ?ĺ???
* @param exps ǰ?벿??????ķ????ֶα???ʽ
* @param sortExps ??벿??????ķ????ֶα???ʽ
* @param opt ѡ??
* @param ctx ??????????
* @return Operable
*/
public Operable group(Function function, Expression []exps, Expression []sortExps, String opt, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression []curExps = Operation.dupExpressions(exps, ctx);
Expression []curSortExps = Operation.dupExpressions(sortExps, ctx);
channel.group(function, curExps, curSortExps, opt, ctx);
}
return this;
}
/**
* ???????????????
* @param function ??Ӧ?ĺ???
* @param exps ?????ֶα???ʽ????
* @param names ?????ֶ???????
* @param newExps ???ܱ???ʽ
* @param newNames ?????ֶ???????
* @param opt ѡ??
* @param ctx ??????????
* @return Operable
*/
public Operable group(Function function, Expression[] exps, String []names,
Expression[] newExps, String []newNames, String opt, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression []curExps = Operation.dupExpressions(exps, ctx);
Expression []curNewExps = Operation.dupExpressions(newExps, ctx);
channel.group(function, curExps, names, curNewExps, newNames, opt, ctx);
}
return this;
}
/**
* ???????????????
* @param function ??Ӧ?ĺ???
* @param exps ǰ?벿??????ķ????ֶα???ʽ
* @param names ?ֶ???????
* @param sortExps ??벿??????ķ????ֶα???ʽ
* @param sortNames ?ֶ???????
* @param newExps ???ܱ???ʽ
* @param newNames ?????ֶ???????
* @param opt ѡ??
* @param ctx ??????????
* @return Operable
*/
public Operable group(Function function, Expression[] exps, String []names,
Expression[] sortExps, String []sortNames,
Expression[] newExps, String []newNames, String opt, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression []curExps = Operation.dupExpressions(exps, ctx);
Expression []curSortExps = Operation.dupExpressions(sortExps, ctx);
Expression []curNewExps = Operation.dupExpressions(newExps, ctx);
channel.group(function, curExps, names, curSortExps, sortNames, curNewExps, newNames, opt, ctx);
}
return this;
}
/**
* ???Ӽ???
* @param function ?????ĺ???????
* @param fkNames ????ֶ???????
* @param timeFkNames ʱ???????????
* @param codes ά??????
* @param exps ά??????????
* @param timeExps ά????ʱ????¼?????
* @param opt ѡ??
*/
public Operable switchFk(Function function, String[] fkNames, String[] timeFkNames, Sequence[] codes, Expression[] exps, Expression[] timeExps, String opt, Context ctx) {
checkResultChannel();
for (Channel channel : channels) {
ctx = channel.getContext();
Expression []curexps = Operation.dupExpressions(exps, ctx);
Expression []curTimeExps = Operation.dupExpressions(timeExps, ctx);
channel.switchFk(function, fkNames, timeFkNames, codes, curexps, curTimeExps, opt, ctx);
}
return this;
}
/**
* ????Ƿ??Ѿ??н??????????
*/
protected void checkResultChannel() {
if (result != null) {
throw new RQException("???ӽ????֮?????ټ???????????????");
}
}
/**
* ???ܵ????????ݣ????ܻ??ж??Դͬʱ???ܵ?????????
* @param seq ????
* @param ctx ??????????
*/
public synchronized void push(Sequence seq, Context ctx) {
if (result != null && seq != null) {
result.push(seq, ctx);
}
}
/**
* ???????ͽ???ʱ???ã???Щ???ӵIJ????Ỻ?????ݣ???Ҫ????finish???????Ĵ???
* @param ctx ??????????
*/
public void finish(Context ctx) {
// ÿ·?Ĺܵ??Ѿ????ù?finish
//for (Channel channel : channels) {
// channel.finish(ctx);
//}
}
/**
* ???عܵ??ļ?????
* @return
*/
public Object result() {
if (result instanceof IGroupsResult) {
int count = channels.length;
IGroupsResult groupsResult = (IGroupsResult)channels[0].getResult();
IGroupsResult []groupsResults = new IGroupsResult[count - 1];
for (int i = 1; i < count; ++i) {
groupsResults[i - 1] = (IGroupsResult)channels[i].getResult();
}
Table value = groupsResult.combineGroupsResult(groupsResults, ctx);
if (resultNew == null) {
return value;
} else {
Sequence table = resultNew.process(value, ctx);
if (pkCount > 0 && table instanceof Table) {
String []pks = new String[pkCount];
for (int i = 1; i <= pkCount; ++i) {
pks[i - 1] = "#" + i;
}
((Table)table).setPrimary(pks);
return table;
} else {
return table;
}
}
} else if (result instanceof TotalResult) {
int count = channels.length;
IGroupsResult groupsResult = (IGroupsResult)channels[0].getResult();
IGroupsResult []groupsResults = new IGroupsResult[count - 1];
for (int i = 1; i < count; ++i) {
groupsResults[i - 1] = (IGroupsResult)channels[i].getResult();
}
Table table = groupsResult.combineGroupsResult(groupsResults, ctx);
if (table == null || table.length() == 0) {
return null;
} else {
TotalResult total = (TotalResult)result;
BaseRecord r = table.getRecord(1);
int valCount = total.getCalcExps().length;
if (valCount == 1) {
return r.getNormalFieldValue(0);
} else {
Sequence seq = new Sequence(valCount);
for (int i = 0; i < valCount; ++i) {
seq.add(r.getNormalFieldValue(i));
}
return seq;
}
}
} else if (result != null) {
Object val = result.result();
result = null;
return val;
} else {
return null;
}
}
/**
* ?????ܵ???ǰ??????Ϊ?????
* @return
*/
public Channel fetch() {
checkResultChannel();
result = new FetchResult();
for (Channel channel : channels) {
Push push = new Push(this);
ctx = channel.getContext();
channel.addOperation(push, ctx);
}
return this;
}
/**
* ?????ܵ???ǰ???ݵ????ļ?
* @param file ???ļ?
* @return this
*/
public Channel fetch(FileObject file) {
checkResultChannel();
result = new FetchResult(file);
for (Channel channel : channels) {
Push push = new Push(this);
ctx = channel.getContext();
channel.addOperation(push, ctx);
}
return this;
}
/**
* ?Թܵ???ǰ???ݽ??з??????㲢??Ϊ?????
* @param exps ???????ʽ????
* @param names ?????ֶ???????
* @param calcExps ???ܱ???ʽ????
* @param calcNames ?????ֶ???
* @param opt ѡ??
* @return
*/
public Channel groups(Expression[] exps, String[] names,
Expression[] calcExps, String[] calcNames, String opt) {
checkResultChannel();
result = IGroupsResult.instance(exps, names, calcExps, calcNames, null, opt, ctx);
for (Channel channel : channels) {
Context ctx = channel.getContext();
exps = Operation.dupExpressions(exps, ctx);
calcExps = Operation.dupExpressions(calcExps, ctx);
channel.groups(exps, names, calcExps, calcNames, opt);
}
return this;
}
/**
* ?Թܵ???ǰ???ݽ??л??????㲢??Ϊ?????
* @param calcExps ???ܱ???ʽ
* @return
*/
public Channel total(Expression[] calcExps) {
checkResultChannel();
result = new TotalResult(calcExps, ctx, null);
for (Channel channel : channels) {
Context ctx = channel.getContext();
calcExps = Operation.dupExpressions(calcExps, ctx);
channel.groups(null, null, calcExps, null, null);
}
return this;
}
/**
* ?Թܵ???ǰ???ݽ????????????㲢??Ϊ?????
* @param exps ???????ʽ????
* @param names ?????ֶ???????
* @param calcExps ???ܱ???ʽ????
* @param calcNames ?????ֶ???
* @param opt ѡ??
* @param capacity ?ڴ???Դ?ŵķ?????????
* @return
*/
public Channel groupx(Expression[] exps, String[] names,
Expression[] calcExps, String[] calcNames, String opt, int capacity) {
checkResultChannel();
result = new GroupxResult(exps, names, calcExps, calcNames, opt, ctx, capacity);
for (Channel channel : channels) {
Push push = new Push(this);
ctx = channel.getContext();
channel.addOperation(push, ctx);
}
return this;
}
/**
* ?Թܵ???ǰ???ݽ?????????????㲢??Ϊ?????
* @param exps ???????ʽ????
* @param capacity ?ڴ???Դ?ŵļ?¼????
* @param opt ѡ??
* @return
*/
public Channel sortx(Expression[] exps, int capacity, String opt) {
checkResultChannel();
result = new SortxResult(exps, ctx, capacity, opt);
for (Channel channel : channels) {
Push push = new Push(this);
ctx = channel.getContext();
channel.addOperation(push, ctx);
}
return this;
}
/**
* ?Թܵ???ǰ???ݽ??????????㲢??Ϊ?????
* @param fields
* @param fileTable
* @param keys
* @param exps
* @param expNames
* @param fname
* @param ctx
* @param option
* @param capacity
* @return
*/
public Channel joinx(Expression [][]fields, Object []fileTable, Expression[][] keys,
Expression[][] exps, String[][] expNames, String fname, Context ctx, String option, int capacity) {
checkResultChannel();
result = new CsJoinxResult(fields, fileTable, keys, exps, expNames, fname, ctx, option, capacity);
for (Channel channel : channels) {
Push push = new Push(this);
ctx = channel.getContext();
channel.addOperation(push, ctx);
}
return this;
}
/**
* ?Թܵ???ǰ???ݽ??е??????㲢??Ϊ?????
* @param exp ????????ʽ
* @param initVal ??ʼֵ
* @param c ????????ʽ????????????cΪ??????ǰ????
* @param ctx ??????????
* @return
*/
public Channel iterate(Expression exp, Object initVal, Expression c, Context ctx) {
checkResultChannel();
result = new IterateResult(exp, initVal, c, ctx);
for (Channel channel : channels) {
Push push = new Push(this);
ctx = channel.getContext();
channel.addOperation(push, ctx);
}
return this;
}
/**
* ?Թܵ???ǰ???ݽ???ȥ?????㲢??Ϊ?????
* @param exps ȥ?ر???ʽ
* @param count
* @param opt ѡ??
* @return
*/
public Channel id(Expression []exps, int count, String opt) {
checkResultChannel();
result = new IDResult(exps, count, opt, ctx);
for (Channel channel : channels) {
Push push = new Push(this);
ctx = channel.getContext();
channel.addOperation(push, ctx);
}
return this;
}
}