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More error checking.

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git-svn-id: http://google-refine.googlecode.com/svn/trunk@54 7d457c2a-affb-35e4-300a-418c747d4874
This commit is contained in:
David Huynh 2010-02-06 02:41:31 +00:00
parent 149330fe05
commit 8701d504e6
1 changed files with 34 additions and 23 deletions
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19
src/main/java/com/metaweb/gridworks/commands/util/PreviewExpressionCommand.java
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@ -14,6 +14,7 @@ import org.json.JSONWriter;
import com.metaweb.gridworks.commands.Command;
import com.metaweb.gridworks.expr.Evaluable;
import com.metaweb.gridworks.expr.ExpressionUtils;
import com.metaweb.gridworks.expr.HasFields;
import com.metaweb.gridworks.expr.Parser;
import com.metaweb.gridworks.model.Cell;
import com.metaweb.gridworks.model.Project;
@ -31,8 +32,6 @@ public class PreviewExpressionCommand extends Command {
int cellIndex = Integer.parseInt(request.getParameter("cellIndex"));
String expression = request.getParameter("expression");
Evaluable eval = new Parser(expression).getExpression();
String rowIndicesString = request.getParameter("rowIndices");
if (rowIndicesString == null) {
respond(response, "{ \"code\" : \"error\", \"message\" : \"No row indices specified\" }");
@ -43,8 +42,11 @@ public class PreviewExpressionCommand extends Command {
int length = rowIndices.length();
JSONWriter writer = new JSONWriter(response.getWriter());
writer.object();
try {
Evaluable eval = new Parser(expression).getExpression();
writer.key("code"); writer.value("ok");
writer.key("results"); writer.array();
@ -57,7 +59,7 @@ public class PreviewExpressionCommand extends Command {
Row row = project.rows.get(rowIndex);
if (cellIndex < row.cells.size()) {
Cell cell = row.cells.get(cellIndex);
if (cell.value != null) {
if (cell != null && cell.value != null) {
ExpressionUtils.bind(bindings, row, cell);
try {
@ -69,9 +71,18 @@ public class PreviewExpressionCommand extends Command {
}
}
if (result != null) {
if (result instanceof HasFields) {
result = "[object " + result.getClass().getSimpleName() + "]";
}
}
writer.value(result);
}
writer.endArray();
} catch (Exception e) {
writer.key("code"); writer.value("error");
}
writer.endObject();
} catch (Exception e) {
respondException(response, e);