@Override public RNode create(ASTNode call, RSymbol[] names, RNode[] exprs) {
ArgumentInfo ia = check(call, names, exprs);
boolean product = false;
if (ia.provided("FUN")) {
RNode fnode = exprs[ia.position("FUN")];
if (fnode instanceof Constant) {
RAny value = ((Constant) fnode).execute(null);
if (value instanceof RString) {
RString str = (RString) value;
if (str.size() == 1) {
if (str.getString(0).equals("*")) {
product = true;
}
}
}
}
} else {
product = true;
}
if (product) {
return new MatrixOperation.OuterProduct(call, exprs[ia.position("X")], exprs[ia.position("Y")]);
}
int cnArgs = 2 + names.length - 3; // "-2" because both FUN, X, Y
RSymbol[] cnNames = new RSymbol[cnArgs];
RNode[] cnExprs = new RNode[cnArgs];
cnNames[0] = null;
ValueProvider xArgProvider = new ValueProvider(call);
cnExprs[0] = xArgProvider;
ValueProvider yArgProvider = new ValueProvider(call);
cnExprs[1] = yArgProvider;
ValueProvider[] constantArgProviders = new ValueProvider[cnArgs];
int j = 0;
for (int i = 0; i < names.length; i++) {
if (ia.position("X") == i || ia.position("Y") == i || ia.position("FUN") == i) {
continue;
}
cnNames[2 + j] = names[i];
ValueProvider vp = new ValueProvider(call);
cnExprs[2 + j] = vp;
constantArgProviders[j] = vp;
j++;
}
RNode funExpr = exprs[ia.position("FUN")];
final CallableProvider callableProvider = new CallableProvider(funExpr.getAST(), funExpr);
final RNode callNode = FunctionCall.getFunctionCall(call, callableProvider, cnNames, cnExprs);
final int posX = ia.position("X");
final int posY = ia.position("Y");
final int posFUN = ia.position("FUN");
return new OuterBuiltIn(call, names, exprs, callNode, callableProvider, xArgProvider, yArgProvider, constantArgProviders) {
@Override public RAny doBuiltIn(Frame frame, RAny[] args) {
RAny argx = null;
RAny argy = null;
RAny argfun = null;
int k = 0;
for (int i = 0; i < args.length; i++) {
if (i == posX) {
argx = args[i];
} else if (i == posY) {
argy = args[i];
} else if (i == posFUN) {
argfun = args[i];
} else {
constantArgProviders[k].setValue(args[i]);
k++;
}
}
return outer(frame, argx, argy, argfun);
}
};
}
public RAny outer(Frame frame, RAny xarg, RAny yarg, RAny farg) {
// LICENSE: transcribed code from GNU R, which is licensed under GPL
if (!(xarg instanceof RArray && yarg instanceof RArray)) {
Utils.nyi("unsupported type");
return null;
}
RArray x = (RArray) xarg;
RArray y = (RArray) yarg;
int xsize = x.size();
int ysize = y.size();
RArray expy;
RArray expx;
if (EAGER) {
x = x.materialize(); // FIXME: probably unnecessary (both x and y), could be done on-the-fly in the expansion methods
y = y.materialize();
if (y instanceof DoubleImpl) {
expy = expandYVector((DoubleImpl) y, ysize, xsize);
} else if (y instanceof IntImpl) {
expy = expandYVector((IntImpl) y, ysize, xsize);
} else {
expy = expandYVector(y, ysize, xsize);
}
if (xsize > 0) {
if (x instanceof DoubleImpl) {
expx = expandXVector((DoubleImpl) x, xsize, ysize);
} else if (x instanceof IntImpl) {
expx = expandXVector((IntImpl) x, xsize, ysize);
} else {
expx = expandXVector(x, xsize, ysize);
}
} else {
expx = x;
}
} else {
if (y instanceof RInt) {
expy = lazyExpandYVector((RInt) y, ysize, xsize);
} else {
throw Utils.nyi();
}
if (xsize > 0) {
if (x instanceof RInt) {
expx = lazyExpandXVector((RInt) x, xsize, ysize);
} else {
throw Utils.nyi();
}
} else {
expx = x;
}
}
xArgProvider.setValue(expx);
yArgProvider.setValue(expy);
callableProvider.matchAndSet(frame, farg);
RArray res = (RArray) callNode.execute(frame);
int[] dimx = x.dimensions();
int[] dimy = y.dimensions();
int[] dim;
if (dimx == null) {
if (dimy == null) {
dim = new int[]{xsize, ysize};
} else {
dim = new int[1 + dimy.length];
dim[0] = xsize;
System.arraycopy(dimy, 0, dim, 1, dimy.length);
}
} else {
if (dimy == null) {
dim = new int[dimx.length + 1];
System.arraycopy(dimx, 0, dim, 0, dimx.length);
dim[dimx.length] = ysize;
} else {
dim = new int[dimx.length + dimy.length];
System.arraycopy(dimx, 0, dim, 0, dimx.length);
System.arraycopy(dimy, 0, dim, dimx.length, dimy.length);
}
}
return res.setDimensions(dim); // triggers materialization of the result
}