Package com.google.refine.operations.recon

Source Code of com.google.refine.operations.recon.ReconCopyAcrossColumnsOperation

/*

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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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package com.google.refine.operations.recon;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import org.apache.commons.lang.StringUtils;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONWriter;

import com.google.refine.browsing.Engine;
import com.google.refine.browsing.FilteredRows;
import com.google.refine.browsing.RowVisitor;
import com.google.refine.history.HistoryEntry;
import com.google.refine.model.AbstractOperation;
import com.google.refine.model.Cell;
import com.google.refine.model.Column;
import com.google.refine.model.Project;
import com.google.refine.model.Recon;
import com.google.refine.model.Recon.Judgment;
import com.google.refine.model.Row;
import com.google.refine.model.changes.CellChange;
import com.google.refine.model.changes.MassChange;
import com.google.refine.operations.EngineDependentOperation;
import com.google.refine.operations.OperationRegistry;
import com.google.refine.util.JSONUtilities;

public class ReconCopyAcrossColumnsOperation extends EngineDependentOperation {
    final protected String   _fromColumnName;
    final protected String[] _toColumnNames;
    final protected String[] _judgments;
    final protected boolean  _applyToJudgedCells;
   
    static public AbstractOperation reconstruct(Project project, JSONObject obj) throws Exception {
        JSONObject engineConfig = obj.getJSONObject("engineConfig");
        return new ReconCopyAcrossColumnsOperation(
            engineConfig,
            obj.getString("fromColumnName"),
            JSONUtilities.getStringArray(obj, "toColumnNames"),
            JSONUtilities.getStringArray(obj, "judgments"),
            obj.getBoolean("applyToJudgedCells")
        );
    }
   
    public ReconCopyAcrossColumnsOperation(
        JSONObject engineConfig,
        String fromColumnName,
        String[] toColumnNames,
        String[] judgments,
        boolean applyToJudgedCells) {
        super(engineConfig);
        _fromColumnName = fromColumnName;
        _toColumnNames = toColumnNames;
        _judgments = judgments;
        _applyToJudgedCells = applyToJudgedCells;
    }

    @Override
    public void write(JSONWriter writer, Properties options)
            throws JSONException {
       
        writer.object();
        writer.key("op"); writer.value(OperationRegistry.s_opClassToName.get(this.getClass()));
        writer.key("description"); writer.value(getBriefDescription(null));
        writer.key("engineConfig"); writer.value(getEngineConfig());
        writer.key("fromColumnName"); writer.value(_fromColumnName);
        writer.key("toColumnNames");
            writer.array();
            for (String s : _toColumnNames) {
                writer.value(s);
            }
            writer.endArray();
        writer.key("judgments");
            writer.array();
            for (String s : _judgments) {
                writer.value(s);
            }
            writer.endArray();
        writer.key("applyToJudgedCells"); writer.value(_applyToJudgedCells);
        writer.endObject();
    }

    @Override
    protected HistoryEntry createHistoryEntry(final Project project, final long historyEntryID) throws Exception {
        Engine engine = createEngine(project);
       
        final Column fromColumn = project.columnModel.getColumnByName(_fromColumnName);
       
        final List<Column> toColumns = new ArrayList<Column>(_toColumnNames.length);
        for (String c : _toColumnNames) {
            Column toColumn = project.columnModel.getColumnByName(c);
            if (toColumn != null) {
                toColumns.add(toColumn);
            }
        }
       
        final Set<Recon.Judgment> judgments = new HashSet<Recon.Judgment>(_judgments.length);
        for (String j : _judgments) {
            judgments.add(Recon.stringToJudgment(j));
        }
       
        final List<CellChange> cellChanges = new ArrayList<CellChange>(project.rows.size());
       
        if (fromColumn != null && toColumns.size() > 0) {
            final Map<Object, Recon> cellValueToRecon = new HashMap<Object, Recon>();
           
            FilteredRows filteredRows = engine.getAllFilteredRows();
            try {
                filteredRows.accept(project, new RowVisitor() {
                    @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(fromColumn.getCellIndex());
                        if (cell != null && cell.value != null && cell.recon != null) {
                            if (judgments.contains(cell.recon.judgment)) {
                                cellValueToRecon.put(cell.value, cell.recon);
                            }
                        }
                        return false;
                    }
                });
               
                filteredRows.accept(project, new RowVisitor() {
                    @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) {
                        for (Column column : toColumns) {
                            int cellIndex = column.getCellIndex();
                            Cell cell = row.getCell(cellIndex);
                            if (cell != null && cell.value != null) {
                                Recon reconToCopy = cellValueToRecon.get(cell.value);
                                boolean judged = cell.recon != null && cell.recon.judgment != Judgment.None;
                               
                                if (reconToCopy != null && (!judged || _applyToJudgedCells)) {
                                    Cell newCell = new Cell(cell.value, reconToCopy);
                                    CellChange cellChange = new CellChange(rowIndex, cellIndex, cell, newCell);
                                    cellChanges.add(cellChange);
                                }
                            }
                        }
                        return false;
                    }
                });
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
       
        String description = "Copy " + cellChanges.size() + " recon judgments from column " +
            _fromColumnName + " to " + StringUtils.join(_toColumnNames);
       
        return new HistoryEntry(
            historyEntryID, project, description, this, new MassChange(cellChanges, false));
    }
   
    @Override
    protected String getBriefDescription(Project project) {
        return "Copy recon judgments from column " +
            _fromColumnName + " to " + StringUtils.join(_toColumnNames);
    }
}
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