package com.metaweb.gridworks.model;

import java.io.Serializable;
import java.util.Properties;

import org.json.JSONException;
import org.json.JSONWriter;

import com.metaweb.gridworks.Jsonizable;
import com.metaweb.gridworks.expr.EvalError;
import com.metaweb.gridworks.expr.ExpressionUtils;
import com.metaweb.gridworks.expr.HasFields;

public class Cell implements Serializable, HasFields, Jsonizable {
    private static final long serialVersionUID = -5891067829205458102L;
    
    final public Object value;
    final public Recon  recon;
    
    public Cell(Object value, Recon recon) {
        this.value = value;
        this.recon = recon;
    }
    
    public Object getField(String name, Properties bindings) {
        if ("value".equals(name)) {
            return value;
        } else if ("recon".equals(name)) {
            return recon;
        }
        return null;
    }

    public void write(JSONWriter writer, Properties options) throws JSONException {
        writer.object();
        if (ExpressionUtils.isError(value)) {
            writer.key("e");
            writer.value(((EvalError) value).message);
        } else {
            writer.key("v");
            writer.value(value);
        }
        
        if (recon != null) {
            writer.key("r");
            recon.write(writer, options);
        }
        writer.endObject();
    }
}