dcc3ac8534
git-svn-id: http://google-refine.googlecode.com/svn/trunk@1130 7d457c2a-affb-35e4-300a-418c747d4874
54 lines
2.1 KiB
Java
54 lines
2.1 KiB
Java
package com.google.gridworks.expr.functions;
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import java.util.Properties;
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import org.json.JSONException;
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import org.json.JSONWriter;
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import com.google.gridworks.ProjectManager;
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import com.google.gridworks.InterProjectModel.ProjectJoin;
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import com.google.gridworks.expr.EvalError;
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import com.google.gridworks.expr.WrappedCell;
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import com.google.gridworks.gel.ControlFunctionRegistry;
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import com.google.gridworks.gel.Function;
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import com.google.gridworks.model.Project;
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public class Cross implements Function {
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public Object call(Properties bindings, Object[] args) {
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if (args.length == 3) {
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// from project is implied
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Object wrappedCell = args[0]; // from cell
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Object toProjectName = args[1];
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Object toColumnName = args[2];
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if (wrappedCell != null && wrappedCell instanceof WrappedCell &&
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toProjectName != null && toProjectName instanceof String &&
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toColumnName != null && toColumnName instanceof String) {
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ProjectJoin join = ProjectManager.singleton.getInterProjectModel().getJoin(
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ProjectManager.singleton.getProjectMetadata(
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((Project) bindings.get("project")).id).getName(),
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((WrappedCell) wrappedCell).columnName,
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(String) toProjectName,
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(String) toColumnName
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);
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return join.getRows(((WrappedCell) wrappedCell).cell.value);
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}
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}
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return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects a cell, a project name to join with, and a column name in that project");
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}
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public void write(JSONWriter writer, Properties options)
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throws JSONException {
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writer.object();
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writer.key("description"); writer.value("TODO");
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writer.key("params"); writer.value("cell c, string projectName, string columnName");
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writer.key("returns"); writer.value("array");
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writer.endObject();
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}
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}
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