public Object executeLoop(
RArray array, Selector selectorI, Selector selectorJ, boolean dropVal, int exactVal) {
Selector selI = selectorI;
Selector selJ = selectorJ;
for (; ; ) {
try {
return execute(array, selI, selJ, dropVal, exactVal);
} catch (UnexpectedResultException e) {
Selector failedSelector = (Selector) e.getResult();
if (failedSelector == selI) {
RAny index = selI.getIndex();
selectorIExpr.replace(
Selector.createSelectorNode(
ast, subset, index, selectorIExpr.child, false, selectorI.getTransition()));
selI = selectorIExpr.executeSelector(index);
} else {
// failedSelector == selectorJ
RAny index = selJ.getIndex();
selectorJExpr.replace(
Selector.createSelectorNode(
ast, subset, index, selectorJExpr.child, false, selectorJ.getTransition()));
selJ = selectorJExpr.executeSelector(index);
}
}
}
}
@Override
public Object execute(Frame frame) {
RAny lhsVal = (RAny) lhs.execute(frame);
RAny rowVal = (RAny) rowExpr.execute(frame);
boolean dropVal =
dropExpr.executeLogical(frame)
!= RLogical.FALSE; // FIXME: what is the correct execution order of these args?
int exactVal = exactExpr.executeLogical(frame);
if (!(lhsVal instanceof RArray)) {
throw RError.getObjectNotSubsettable(ast, lhsVal.typeOf());
}
RArray array = (RArray) lhsVal;
int[] dim = array.dimensions();
if (dim == null || dim.length != 2) {
throw RError.getIncorrectDimensions(getAST());
}
int m = dim[0];
int n = dim[1];
try {
int row;
if (rowVal instanceof ScalarIntImpl) {
row = ((ScalarIntImpl) rowVal).getInt();
} else if (rowVal instanceof ScalarDoubleImpl) {
row = Convert.double2int(((ScalarDoubleImpl) rowVal).getDouble());
} else {
throw new UnexpectedResultException(null);
}
if (row > n || row <= 0) {
throw new UnexpectedResultException(null);
}
int[] ndim;
if (dropVal) {
ndim = null;
} else {
ndim = new int[] {1, n};
}
// note: also could be lazy here
RArray res = Utils.createArray(array, n, ndim, null, null); // drop attributes
int offset = row - 1;
for (int i = 0; i < n; i++) {
res.set(i, array.getRef(offset));
offset += m;
}
return res;
} catch (UnexpectedResultException e) {
SelectorNode selIExpr = Selector.createSelectorNode(ast, true, rowExpr);
SelectorNode selJExpr = Selector.createSelectorNode(ast, true, null);
MatrixRead nn = new MatrixRead(ast, true, lhs, selIExpr, selJExpr, dropExpr, exactExpr);
replace(nn, "install MatrixRead from MatrixRowSubset");
Selector selI = selIExpr.executeSelector(rowVal);
Selector selJ = selJExpr.executeSelector(frame);
return nn.executeLoop(array, selI, selJ, dropVal, exactVal);
}
}
/**
* Execute method which evaluates the lhs, selectors and optional expressions, checks that the
* array selection can proceed and then proceeds optionally replacing the falling selectors.
*
* <p>The valued variant of execute is called for the production of the result, on failure the
* responsible selector is replaced and the valued variant is called again.
*/
protected final Object executeLoop(RArray array, boolean dropVal, int exactVal) {
while (true) {
try {
return execute(array, dropVal, exactVal);
} catch (UnexpectedResultException e) {
Selector failedSelector = (Selector) e.getResult();
for (int i = 0; i < selectorVals.length; ++i) {
if (selectorVals[i] == failedSelector) {
RAny index = failedSelector.getIndex();
SelectorNode newSelector =
Selector.createSelectorNode(
ast, subset, index, selectorExprs[i], false, failedSelector.getTransition());
selectorExprs[i] = adoptChild(newSelector);
selectorVals[i] = newSelector.executeSelector(index);
}
}
}
}
}
@Override
public Object execute(Frame frame) {
RAny lhsVal = (RAny) lhs.execute(frame);
Object rowFromVal = rowFromExpr.execute(frame);
Object rowToVal = rowToExpr.execute(frame);
Object colFromVal = colFromExpr.execute(frame);
Object colToVal = colToExpr.execute(frame);
boolean dropVal =
dropExpr.executeLogical(frame)
!= RLogical.FALSE; // FIXME: what is the correct execution order of these args?
int exactVal = exactExpr.executeLogical(frame);
if (!(lhsVal instanceof RArray)) {
throw RError.getObjectNotSubsettable(ast, lhsVal.typeOf());
}
RArray array = (RArray) lhsVal;
try {
int rowFrom = extractLimit(rowFromVal); // zero-based
int rowTo = extractLimit(rowToVal);
int colFrom = extractLimit(colFromVal);
int colTo = extractLimit(colToVal);
int[] dim = array.dimensions();
if (dim == null || dim.length != 2) {
throw RError.getIncorrectDimensions(getAST());
}
int m = dim[0];
int n = dim[1];
int rowStep;
int rowSize;
if (rowFrom <= rowTo) {
rowStep = 1;
if (rowTo > m) {
throw new UnexpectedResultException(null);
}
rowSize = rowTo - rowFrom + 1;
} else {
rowStep = -1;
if (rowFrom > m) {
throw new UnexpectedResultException(null);
}
rowSize = rowFrom - rowTo + 1;
}
int colStep;
int colSize;
if (colFrom <= colTo) {
colStep = 1;
if (colTo > n) {
throw new UnexpectedResultException(null);
}
colSize = colTo - colFrom + 1;
} else {
colStep = -1;
if (colFrom > n) {
throw new UnexpectedResultException(null);
}
colSize = colFrom - colTo + 1;
}
int[] ndim;
if (!dropVal || (rowSize > 1 && colSize > 1)) {
ndim = new int[] {rowSize, colSize};
} else {
ndim = null;
}
int size = rowSize * colSize;
RArray res = Utils.createArray(array, size, ndim, null, null); // drop attributes
if (colStep == 1 && rowStep == 1) {
int j = colFrom * m + rowFrom; // j - index to source matrix
int jmax = j + rowSize;
int jadvance = m - rowSize;
for (int i = 0; i < size; i++) {
res.set(i, array.getRef(j++)); // i - index to target matrix
if (j == jmax) {
j += jadvance;
jmax += m;
}
}
} else {
int i = 0;
// NOTE: here we know that colFrom != colTo and rowFrom != rowTo
for (int col = colFrom; col != colTo + colStep; col += colStep) {
for (int row = rowFrom; row != rowTo + rowStep; row += rowStep) {
res.set(i++, array.getRef(col * m + row));
}
}
}
return res;
} catch (UnexpectedResultException e) {
// FIXME: clean this up; does Colon need to be package-private?
ASTNode rowAST = rowFromExpr.getAST().getParent();
Builtin rowColon =
(Builtin)
Primitives.getCallFactory(RSymbol.getSymbol(":"), null)
.create(rowAST, rowFromExpr, rowToExpr);
SelectorNode selIExpr = Selector.createSelectorNode(rowAST, true, rowColon);
ASTNode colAST = colFromExpr.getAST().getParent();
Builtin colColon =
(Builtin)
Primitives.getCallFactory(RSymbol.getSymbol(":"), null)
.create(colAST, colFromExpr, colToExpr);
SelectorNode selJExpr = Selector.createSelectorNode(ast, true, colColon);
MatrixRead nn = new MatrixRead(ast, true, lhs, selIExpr, selJExpr, dropExpr, exactExpr);
replace(nn, "install MatrixRead from MatrixSequenceSubset");
Selector selI =
selIExpr.executeSelector(
rowColon.doBuiltIn(frame, new RAny[] {(RAny) rowFromVal, (RAny) rowToVal}));
Selector selJ =
selJExpr.executeSelector(
colColon.doBuiltIn(frame, new RAny[] {(RAny) colFromVal, (RAny) colToVal}));
return nn.executeLoop(array, selI, selJ, dropVal, exactVal);
}
}
@Override
public Object execute(Frame frame) {
RAny lhsVal = (RAny) lhs.execute(frame);
RAny colVal = (RAny) columnExpr.execute(frame);
boolean dropVal =
dropExpr.executeLogical(frame)
!= RLogical.FALSE; // FIXME: what is the correct execution order of these args?
int exactVal = exactExpr.executeLogical(frame);
// TODO: GNU-R has different behavior when selecting from arrays that have some dimension zero
if (!(lhsVal instanceof RArray)) {
throw RError.getObjectNotSubsettable(ast, lhsVal.typeOf());
}
RArray array = (RArray) lhsVal;
int[] dim = array.dimensions();
if (dim == null || dim.length != nSelectors) {
throw RError.getIncorrectDimensions(getAST());
}
int n = dim[nSelectors - 1]; // limit for the column (last dimension)
try {
int col;
if (colVal instanceof ScalarIntImpl) {
col = ((ScalarIntImpl) colVal).getInt();
} else if (colVal instanceof ScalarDoubleImpl) {
col = Convert.double2int(((ScalarDoubleImpl) colVal).getDouble());
} else {
throw new UnexpectedResultException(null);
}
if (col > n || col <= 0) {
throw new UnexpectedResultException(null);
}
int[] ndim;
int m; // size of the result
if (dropVal) {
boolean hasNonTrivialDimension = false;
boolean resultIsVector = true;
m = 1;
for (int i = 0; i < nSelectors - 1; i++) {
int d = dim[i];
if (d != 1) {
if (hasNonTrivialDimension) {
resultIsVector = false;
} else {
hasNonTrivialDimension = true;
}
}
m *= d;
}
if (resultIsVector) {
ndim = null;
} else {
ndim = new int[nSelectors - 1];
System.arraycopy(dim, 0, ndim, 0, ndim.length);
}
} else {
ndim = new int[nSelectors];
ndim[nSelectors - 1] = 1;
m = 1;
for (int i = 0; i < ndim.length - 1; i++) {
int d = dim[i];
ndim[i] = d;
m *= d;
}
}
// note: also could be lazy here
RArray res = Utils.createArray(array, m, ndim, null, null); // drop attributes
int offset = (col - 1) * m; // note: col is 1-based
for (int i = 0; i < m; i++) {
res.set(i, array.getRef(offset + i));
}
return res;
} catch (UnexpectedResultException e) {
SelectorNode[] selectorExprs = new SelectorNode[nSelectors];
for (int i = 0; i < nSelectors - 1; i++) {
selectorExprs[i] = Selector.createSelectorNode(ast, true, null);
}
selectorExprs[nSelectors - 1] = Selector.createSelectorNode(ast, true, columnExpr);
GenericRead gr = new GenericRead(ast, true, lhs, selectorExprs, dropExpr, exactExpr);
replace(gr, "install GenericRead from ArrayColumnSubset");
for (int i = 0; i < nSelectors - 1; i++) {
gr.selectorVals[i] = selectorExprs[i].executeSelector(frame);
}
gr.selectorVals[nSelectors - 1] = selectorExprs[nSelectors - 1].executeSelector(colVal);
return gr.executeLoop(array, dropVal, exactVal);
}
}