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package com.google.refine.commands.browsing;
import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.json.JSONException;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.refine.browsing.Engine;
import com.google.refine.browsing.FilteredRows;
import com.google.refine.browsing.facets.ScatterplotDrawingRowVisitor;
import com.google.refine.browsing.facets.ScatterplotFacet;
import com.google.refine.browsing.util.NumericBinIndex;
import com.google.refine.commands.Command;
import com.google.refine.expr.Evaluable;
import com.google.refine.expr.MetaParser;
import com.google.refine.expr.ParsingException;
import com.google.refine.model.Column;
import com.google.refine.model.Project;
public class GetScatterplotCommand extends Command {
final static Logger logger = LoggerFactory.getLogger("get-scatterplot_command");
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
long start = System.currentTimeMillis();
Project project = getProject(request);
Engine engine = getEngine(request, project);
JSONObject conf = getJsonParameter(request,"plotter");
response.setHeader("Content-Type", "image/png");
ServletOutputStream sos = null;
try {
sos = response.getOutputStream();
draw(sos, project, engine, conf);
} finally {
sos.close();
}
logger.trace("Drawn scatterplot in {} ms", Long.toString(System.currentTimeMillis() - start));
} catch (Exception e) {
e.printStackTrace();
respondException(response, e);
}
}
public void draw(OutputStream output, Project project, Engine engine, JSONObject o) throws IOException, JSONException {
double min_x = 0;
double min_y = 0;
double max_x = 0;
double max_y = 0;
int columnIndex_x = 0;
int columnIndex_y = 0;
Evaluable eval_x = null;
Evaluable eval_y = null;
int size = (o.has(ScatterplotFacet.SIZE)) ? o.getInt(ScatterplotFacet.SIZE) : 100;
double dot = (o.has(ScatterplotFacet.DOT)) ? o.getDouble(ScatterplotFacet.DOT) : 100;
int dim_x = (o.has(ScatterplotFacet.DIM_X)) ? ScatterplotFacet.getAxisDim(o.getString(ScatterplotFacet.DIM_X)) : ScatterplotFacet.LIN;
int dim_y = (o.has(ScatterplotFacet.DIM_Y)) ? ScatterplotFacet.getAxisDim(o.getString(ScatterplotFacet.DIM_Y)) : ScatterplotFacet.LIN;
int rotation = (o.has(ScatterplotFacet.ROTATION)) ? ScatterplotFacet.getRotation(o.getString(ScatterplotFacet.ROTATION)) : ScatterplotFacet.NO_ROTATION;
String color_str = (o.has(ScatterplotFacet.COLOR)) ? o.getString(ScatterplotFacet.COLOR) : "000000";
Color color = new Color(Integer.parseInt(color_str,16));
String base_color_str = (o.has(ScatterplotFacet.BASE_COLOR)) ? o.getString(ScatterplotFacet.BASE_COLOR) : null;
Color base_color = base_color_str != null ? new Color(Integer.parseInt(base_color_str,16)) : null;
String columnName_x = o.getString(ScatterplotFacet.X_COLUMN_NAME);
String expression_x = (o.has(ScatterplotFacet.X_EXPRESSION)) ? o.getString(ScatterplotFacet.X_EXPRESSION) : "value";
if (columnName_x.length() > 0) {
Column x_column = project.columnModel.getColumnByName(columnName_x);
if (x_column != null) {
columnIndex_x = x_column.getCellIndex();
}
} else {
columnIndex_x = -1;
}
try {
eval_x = MetaParser.parse(expression_x);
} catch (ParsingException e) {
logger.warn("error parsing expression", e);
}
String columnName_y = o.getString(ScatterplotFacet.Y_COLUMN_NAME);
String expression_y = (o.has(ScatterplotFacet.Y_EXPRESSION)) ? o.getString(ScatterplotFacet.Y_EXPRESSION) : "value";
if (columnName_y.length() > 0) {
Column y_column = project.columnModel.getColumnByName(columnName_y);
if (y_column != null) {
columnIndex_y = y_column.getCellIndex();
}
} else {
columnIndex_y = -1;
}
try {
eval_y = MetaParser.parse(expression_y);
} catch (ParsingException e) {
logger.warn("error parsing expression", e);
}
NumericBinIndex index_x = null;
NumericBinIndex index_y = null;
String col_x_name = o.getString(ScatterplotFacet.X_COLUMN_NAME);
Column column_x = project.columnModel.getColumnByName(col_x_name);
if (column_x != null) {
columnIndex_x = column_x.getCellIndex();
index_x = ScatterplotFacet.getBinIndex(project, column_x, eval_x, expression_x);
min_x = index_x.getMin();
max_x = index_x.getMax();
}
String col_y_name = o.getString(ScatterplotFacet.Y_COLUMN_NAME);
Column column_y = project.columnModel.getColumnByName(col_y_name);
if (column_y != null) {
columnIndex_y = column_y.getCellIndex();
index_y = ScatterplotFacet.getBinIndex(project, column_y, eval_y, expression_y);
min_y = index_y.getMin();
max_y = index_y.getMax();
}
if (index_x != null && index_y != null && index_x.isNumeric() && index_y.isNumeric()) {
ScatterplotDrawingRowVisitor drawer = new ScatterplotDrawingRowVisitor(
columnIndex_x, columnIndex_y, min_x, max_x, min_y, max_y,
size, dim_x, dim_y, rotation, dot, color
);
if (base_color != null) {
drawer.setColor(base_color);
FilteredRows filteredRows = engine.getAllRows();
filteredRows.accept(project, drawer);
drawer.setColor(color);
}
{
FilteredRows filteredRows = engine.getAllFilteredRows();
filteredRows.accept(project, drawer);
}
ImageIO.write(drawer.getImage(), "png", output);
} else {
ImageIO.write(new BufferedImage(1, 1, BufferedImage.TYPE_4BYTE_ABGR), "png", output);
}
}
}