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package com.google.refine.browsing.facets;
import java.util.Properties;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONWriter;
import com.google.refine.browsing.FilteredRecords;
import com.google.refine.browsing.FilteredRows;
import com.google.refine.browsing.RowFilter;
import com.google.refine.browsing.filters.ExpressionTimeComparisonRowFilter;
import com.google.refine.browsing.util.ExpressionTimeValueBinner;
import com.google.refine.browsing.util.RowEvaluable;
import com.google.refine.browsing.util.TimeBinIndex;
import com.google.refine.browsing.util.TimeBinRecordIndex;
import com.google.refine.browsing.util.TimeBinRowIndex;
import com.google.refine.expr.MetaParser;
import com.google.refine.expr.ParsingException;
import com.google.refine.model.Column;
import com.google.refine.model.Project;
import com.google.refine.util.JSONUtilities;
public class TimeRangeFacet extends RangeFacet {
protected boolean _selectTime; // whether the time selection applies, default true
protected boolean _selectNonTime;
protected int _baseTimeCount;
protected int _baseNonTimeCount;
protected int _timeCount;
protected int _nonTimeCount;
@Override
public void write(JSONWriter writer, Properties options) throws JSONException {
writer.object();
writer.key("name"); writer.value(_name);
writer.key("expression"); writer.value(_expression);
writer.key("columnName"); writer.value(_columnName);
if (_errorMessage != null) {
writer.key("error"); writer.value(_errorMessage);
} else {
if (!Double.isInfinite(_min) && !Double.isInfinite(_max)) {
writer.key(MIN); writer.value(_min);
writer.key(MAX); writer.value(_max);
writer.key("step"); writer.value(_step);
writer.key("bins"); writer.array();
for (int b : _bins) {
writer.value(b);
}
writer.endArray();
writer.key("baseBins"); writer.array();
for (int b : _baseBins) {
writer.value(b);
}
writer.endArray();
writer.key(FROM); writer.value(_from);
writer.key(TO); writer.value(_to);
}
writer.key("baseTimeCount"); writer.value(_baseTimeCount);
writer.key("baseNonTimeCount"); writer.value(_baseNonTimeCount);
writer.key("baseBlankCount"); writer.value(_baseBlankCount);
writer.key("baseErrorCount"); writer.value(_baseErrorCount);
writer.key("timeCount"); writer.value(_timeCount);
writer.key("nonTimeCount"); writer.value(_nonTimeCount);
writer.key("blankCount"); writer.value(_blankCount);
writer.key("errorCount"); writer.value(_errorCount);
}
writer.endObject();
}
@Override
public void initializeFromJSON(Project project, JSONObject o) throws JSONException {
_name = o.getString("name");
_expression = o.getString("expression");
_columnName = o.getString("columnName");
if (_columnName.length() > 0) {
Column column = project.columnModel.getColumnByName(_columnName);
if (column != null) {
_cellIndex = column.getCellIndex();
} else {
_errorMessage = "No column named " + _columnName;
}
} else {
_cellIndex = -1;
}
try {
_eval = MetaParser.parse(_expression);
} catch (ParsingException e) {
_errorMessage = e.getMessage();
}
if (o.has(FROM) || o.has(TO)) {
_from = o.has(FROM) ? o.getDouble(FROM) : _min;
_to = o.has(TO) ? o.getDouble(TO) : _max;
_selected = true;
}
_selectTime = JSONUtilities.getBoolean(o, "selectTime", true);
_selectNonTime = JSONUtilities.getBoolean(o, "selectNonTime", true);
_selectBlank = JSONUtilities.getBoolean(o, "selectBlank", true);
_selectError = JSONUtilities.getBoolean(o, "selectError", true);
if (!_selectTime || !_selectNonTime || !_selectBlank || !_selectError) {
_selected = true;
}
}
@Override
public RowFilter getRowFilter(Project project) {
if (_eval != null && _errorMessage == null && _selected) {
return new ExpressionTimeComparisonRowFilter(
getRowEvaluable(project), _selectTime, _selectNonTime, _selectBlank, _selectError) {
@Override
protected boolean checkValue(long t) {
return t >= _from && t <= _to;
};
};
} else {
return null;
}
}
@Override
public void computeChoices(Project project, FilteredRows filteredRows) {
if (_eval != null && _errorMessage == null) {
RowEvaluable rowEvaluable = getRowEvaluable(project);
Column column = project.columnModel.getColumnByCellIndex(_cellIndex);
String key = "time-bin:row-based:" + _expression;
TimeBinIndex index = (TimeBinIndex) column.getPrecompute(key);
if (index == null) {
index = new TimeBinRowIndex(project, rowEvaluable);
column.setPrecompute(key, index);
}
retrieveDataFromBaseBinIndex(index);
ExpressionTimeValueBinner binner = new ExpressionTimeValueBinner(rowEvaluable, index);
filteredRows.accept(project, binner);
retrieveDataFromBinner(binner);
}
}
@Override
public void computeChoices(Project project, FilteredRecords filteredRecords) {
if (_eval != null && _errorMessage == null) {
RowEvaluable rowEvaluable = getRowEvaluable(project);
Column column = project.columnModel.getColumnByCellIndex(_cellIndex);
String key = "time-bin:record-based:" + _expression;
TimeBinIndex index = (TimeBinIndex) column.getPrecompute(key);
if (index == null) {
index = new TimeBinRecordIndex(project, rowEvaluable);
column.setPrecompute(key, index);
}
retrieveDataFromBaseBinIndex(index);
ExpressionTimeValueBinner binner = new ExpressionTimeValueBinner(rowEvaluable, index);
filteredRecords.accept(project, binner);
retrieveDataFromBinner(binner);
}
}
protected void retrieveDataFromBaseBinIndex(TimeBinIndex index) {
_min = index.getMin();
_max = index.getMax();
_step = index.getStep();
_baseBins = index.getBins();
_baseTimeCount = index.getTimeRowCount();
_baseNonTimeCount = index.getNonTimeRowCount();
_baseBlankCount = index.getBlankRowCount();
_baseErrorCount = index.getErrorRowCount();
if (_selected) {
_from = Math.max(_from, _min);
_to = Math.min(_to, _max);
} else {
_from = _min;
_to = _max;
}
}
protected void retrieveDataFromBinner(ExpressionTimeValueBinner binner) {
_bins = binner.bins;
_timeCount = binner.timeCount;
_nonTimeCount = binner.nonTimeCount;
_blankCount = binner.blankCount;
_errorCount = binner.errorCount;
}
}