RandomSec/main/src/com/google/gridworks/expr/functions/Cross.java
2010-08-03 23:01:18 +00:00

54 lines
2.1 KiB
Java

package com.google.gridworks.expr.functions;
import java.util.Properties;
import org.json.JSONException;
import org.json.JSONWriter;
import com.google.gridworks.ProjectManager;
import com.google.gridworks.InterProjectModel.ProjectJoin;
import com.google.gridworks.expr.EvalError;
import com.google.gridworks.expr.WrappedCell;
import com.google.gridworks.gel.ControlFunctionRegistry;
import com.google.gridworks.gel.Function;
import com.google.gridworks.model.Project;
public class Cross implements Function {
public Object call(Properties bindings, Object[] args) {
if (args.length == 3) {
// from project is implied
Object wrappedCell = args[0]; // from cell
Object toProjectName = args[1];
Object toColumnName = args[2];
if (wrappedCell != null && wrappedCell instanceof WrappedCell &&
toProjectName != null && toProjectName instanceof String &&
toColumnName != null && toColumnName instanceof String) {
ProjectJoin join = ProjectManager.singleton.getInterProjectModel().getJoin(
ProjectManager.singleton.getProjectMetadata(
((Project) bindings.get("project")).id).getName(),
((WrappedCell) wrappedCell).columnName,
(String) toProjectName,
(String) toColumnName
);
return join.getRows(((WrappedCell) wrappedCell).cell.value);
}
}
return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a cell, a project name to join with, and a column name in that project");
}
public void write(JSONWriter writer, Properties options)
throws JSONException {
writer.object();
writer.key("description"); writer.value("TODO");
writer.key("params"); writer.value("cell c, string projectName, string columnName");
writer.key("returns"); writer.value("array");
writer.endObject();
}
}