Examples with Evaluable com.google.refine.expr.Evaluable used on opensource projects

Example 6 with Evaluable

use of com.google.refine.expr.Evaluable in project OpenRefine by OpenRefine.

the class ForNonBlank method call.

@Override
public Object call(Properties bindings, Evaluable[] args) {
    Object o = args[0].evaluate(bindings);
    Evaluable var = args[1];
    String name = ((VariableExpr) var).getName();
    if (ExpressionUtils.isNonBlankData(o)) {
        Object oldValue = bindings.get(name);
        bindings.put(name, o);
        try {
            return args[2].evaluate(bindings);
        } finally {
            /*
                 *  Restore the old value bound to the variable, if any.
                 */
            if (oldValue != null) {
                bindings.put(name, oldValue);
            } else {
                bindings.remove(name);
            }
        }
    } else {
        return args[3].evaluate(bindings);
    }
}

Example 7 with Evaluable

use of com.google.refine.expr.Evaluable in project OpenRefine by OpenRefine.

the class GetColumnsInfoCommand method getBinIndex.

private NumericBinIndex getBinIndex(Project project, Column column) {
    String expression = "value";
    String key = "numeric-bin:" + expression;
    Evaluable eval = null;
    try {
        eval = MetaParser.parse(expression);
    } catch (ParsingException e) {
    // this should never happen
    }
    NumericBinIndex index = (NumericBinIndex) column.getPrecompute(key);
    if (index == null) {
        index = new NumericBinRowIndex(project, new ExpressionBasedRowEvaluable(column.getName(), column.getCellIndex(), eval));
        column.setPrecompute(key, index);
    }
    return index;
}

Example 8 with Evaluable

use of com.google.refine.expr.Evaluable in project OpenRefine by OpenRefine.

the class MassEditOperation method createRowVisitor.

@Override
protected RowVisitor createRowVisitor(Project project, List<CellChange> cellChanges, long historyEntryID) throws Exception {
    Column column = project.columnModel.getColumnByName(_columnName);
    Evaluable eval = MetaParser.parse(_expression);
    Properties bindings = ExpressionUtils.createBindings(project);
    Map<String, Serializable> fromTo = new HashMap<String, Serializable>();
    Serializable fromBlankTo = null;
    Serializable fromErrorTo = null;
    for (Edit edit : _edits) {
        for (String s : edit.from) {
            fromTo.put(s, edit.to);
        }
        // the last edit wins
        if (edit.fromBlank) {
            fromBlankTo = edit.to;
        }
        if (edit.fromError) {
            fromErrorTo = edit.to;
        }
    }
    return new RowVisitor() {

        int cellIndex;

        Properties bindings;

        List<CellChange> cellChanges;

        Evaluable eval;

        Map<String, Serializable> fromTo;

        Serializable fromBlankTo;

        Serializable fromErrorTo;

        public RowVisitor init(int cellIndex, Properties bindings, List<CellChange> cellChanges, Evaluable eval, Map<String, Serializable> fromTo, Serializable fromBlankTo, Serializable fromErrorTo) {
            this.cellIndex = cellIndex;
            this.bindings = bindings;
            this.cellChanges = cellChanges;
            this.eval = eval;
            this.fromTo = fromTo;
            this.fromBlankTo = fromBlankTo;
            this.fromErrorTo = fromErrorTo;
            return this;
        }

        @Override
        public void start(Project project) {
        // nothing to do
        }

        @Override
        public void end(Project project) {
        // nothing to do
        }

        @Override
        public boolean visit(Project project, int rowIndex, Row row) {
            Cell cell = row.getCell(cellIndex);
            Cell newCell = null;
            ExpressionUtils.bind(bindings, row, rowIndex, _columnName, cell);
            Object v = eval.evaluate(bindings);
            if (ExpressionUtils.isError(v)) {
                if (fromErrorTo != null) {
                    newCell = new Cell(fromErrorTo, (cell != null) ? cell.recon : null);
                }
            } else if (ExpressionUtils.isNonBlankData(v)) {
                String from = v.toString();
                Serializable to = fromTo.get(from);
                if (to != null) {
                    newCell = new Cell(to, (cell != null) ? cell.recon : null);
                }
            } else {
                if (fromBlankTo != null) {
                    newCell = new Cell(fromBlankTo, (cell != null) ? cell.recon : null);
                }
            }
            if (newCell != null) {
                CellChange cellChange = new CellChange(rowIndex, cellIndex, cell, newCell);
                cellChanges.add(cellChange);
            }
            return false;
        }
    }.init(column.getCellIndex(), bindings, cellChanges, eval, fromTo, fromBlankTo, fromErrorTo);
}

Example 9 with Evaluable

use of com.google.refine.expr.Evaluable in project OpenRefine by OpenRefine.

the class TextTransformOperation method createRowVisitor.

@Override
protected RowVisitor createRowVisitor(Project project, List<CellChange> cellChanges, long historyEntryID) throws Exception {
    Column column = project.columnModel.getColumnByName(_columnName);
    Evaluable eval = MetaParser.parse(_expression);
    Properties bindings = ExpressionUtils.createBindings(project);
    return new RowVisitor() {

        int cellIndex;

        Properties bindings;

        List<CellChange> cellChanges;

        Evaluable eval;

        public RowVisitor init(int cellIndex, Properties bindings, List<CellChange> cellChanges, Evaluable eval) {
            this.cellIndex = cellIndex;
            this.bindings = bindings;
            this.cellChanges = cellChanges;
            this.eval = eval;
            return this;
        }

        @Override
        public void start(Project project) {
        // nothing to do
        }

        @Override
        public void end(Project project) {
        // nothing to do
        }

        @Override
        public boolean visit(Project project, int rowIndex, Row row) {
            Cell cell = row.getCell(cellIndex);
            Cell newCell = null;
            Object oldValue = cell != null ? cell.value : null;
            ExpressionUtils.bind(bindings, row, rowIndex, _columnName, cell);
            Object o = eval.evaluate(bindings);
            if (o == null) {
                if (oldValue != null) {
                    CellChange cellChange = new CellChange(rowIndex, cellIndex, cell, null);
                    cellChanges.add(cellChange);
                }
            } else {
                if (o instanceof Cell) {
                    newCell = (Cell) o;
                } else if (o instanceof WrappedCell) {
                    newCell = ((WrappedCell) o).cell;
                } else {
                    Serializable newValue = ExpressionUtils.wrapStorable(o);
                    if (ExpressionUtils.isError(newValue)) {
                        if (_onError == OnError.KeepOriginal) {
                            return false;
                        } else if (_onError == OnError.SetToBlank) {
                            newValue = null;
                        }
                    }
                    if (!ExpressionUtils.sameValue(oldValue, newValue)) {
                        newCell = new Cell(newValue, (cell != null) ? cell.recon : null);
                        if (_repeat) {
                            for (int i = 0; i < _repeatCount; i++) {
                                ExpressionUtils.bind(bindings, row, rowIndex, _columnName, newCell);
                                newValue = ExpressionUtils.wrapStorable(eval.evaluate(bindings));
                                if (ExpressionUtils.isError(newValue)) {
                                    break;
                                } else if (ExpressionUtils.sameValue(newCell.value, newValue)) {
                                    break;
                                }
                                newCell = new Cell(newValue, newCell.recon);
                            }
                        }
                    }
                }
                if (newCell != null) {
                    CellChange cellChange = new CellChange(rowIndex, cellIndex, cell, newCell);
                    cellChanges.add(cellChange);
                }
            }
            return false;
        }
    }.init(column.getCellIndex(), bindings, cellChanges, eval);
}

Example 10 with Evaluable

use of com.google.refine.expr.Evaluable in project OpenRefine by OpenRefine.

the class ColumnAdditionOperation method createRowVisitor.

protected RowVisitor createRowVisitor(Project project, List<CellAtRow> cellsAtRows) throws Exception {
    Column column = project.columnModel.getColumnByName(_baseColumnName);
    Evaluable eval = MetaParser.parse(_expression);
    Properties bindings = ExpressionUtils.createBindings(project);
    return new RowVisitor() {

        int cellIndex;

        Properties bindings;

        List<CellAtRow> cellsAtRows;

        Evaluable eval;

        public RowVisitor init(int cellIndex, Properties bindings, List<CellAtRow> cellsAtRows, Evaluable eval) {
            this.cellIndex = cellIndex;
            this.bindings = bindings;
            this.cellsAtRows = cellsAtRows;
            this.eval = eval;
            return this;
        }

        @Override
        public void start(Project project) {
        // nothing to do
        }

        @Override
        public void end(Project project) {
        // nothing to do
        }

        @Override
        public boolean visit(Project project, int rowIndex, Row row) {
            Cell cell = row.getCell(cellIndex);
            Cell newCell = null;
            ExpressionUtils.bind(bindings, row, rowIndex, _baseColumnName, cell);
            Object o = eval.evaluate(bindings);
            if (o != null) {
                if (o instanceof Cell) {
                    newCell = (Cell) o;
                } else if (o instanceof WrappedCell) {
                    newCell = ((WrappedCell) o).cell;
                } else {
                    Serializable v = ExpressionUtils.wrapStorable(o);
                    if (ExpressionUtils.isError(v)) {
                        if (_onError == OnError.SetToBlank) {
                            return false;
                        } else if (_onError == OnError.KeepOriginal) {
                            v = cell != null ? cell.value : null;
                        }
                    }
                    if (v != null) {
                        newCell = new Cell(v, null);
                    }
                }
            }
            if (newCell != null) {
                cellsAtRows.add(new CellAtRow(rowIndex, newCell));
            }
            return false;
        }
    }.init(column.getCellIndex(), bindings, cellsAtRows, eval);
}