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* Redistributions of source code must retain the above copyright
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* Redistributions in binary form must reproduce the above
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this software without specific prior written permission.
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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*/
package com.google.refine.model;
import java.io.Serializable;
import java.io.Writer;
import java.util.Calendar;
import java.util.Date;
import java.util.Properties;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.JsonToken;
import org.json.JSONException;
import org.json.JSONWriter;
import com.google.refine.Jsonizable;
import com.google.refine.expr.EvalError;
import com.google.refine.expr.ExpressionUtils;
import com.google.refine.expr.HasFields;
import com.google.refine.util.ParsingUtilities;
import com.google.refine.util.Pool;
public class Cell implements HasFields, Jsonizable {
final public Serializable value;
final public Recon recon;
public Cell(Serializable value, Recon recon) {
this.value = value;
this.recon = recon;
}
@Override
public Object getField(String name, Properties bindings) {
if ("value".equals(name)) {
return value;
} else if ("recon".equals(name)) {
return recon;
}
return null;
}
@Override
public boolean fieldAlsoHasFields(String name) {
return "recon".equals(name);
}
@Override
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");
if (value != null) {
if (value instanceof Calendar) {
writer.value(ParsingUtilities.dateToString(((Calendar) value).getTime()));
writer.key("t"); writer.value("date");
} else if (value instanceof Date) {
writer.value(ParsingUtilities.dateToString((Date) value));
writer.key("t"); writer.value("date");
} else if (value instanceof Double
&& (((Double)value).isNaN() || ((Double)value).isInfinite())) {
// write as a string
writer.value(((Double)value).toString());
} else if (value instanceof Float
&& (((Float)value).isNaN() || ((Float)value).isInfinite())) {
// TODO: Skip? Write as string?
writer.value(((Float)value).toString());
} else {
writer.value(value);
}
} else {
writer.value(null);
}
}
if (recon != null) {
writer.key("r");
writer.value(Long.toString(recon.id));
Pool pool = (Pool) options.get("pool");
pool.pool(recon);
}
writer.endObject();
}
public void save(Writer writer, Properties options) {
JSONWriter jsonWriter = new JSONWriter(writer);
try {
write(jsonWriter, options);
} catch (JSONException e) {
e.printStackTrace();
}
}
static public Cell loadStreaming(String s, Pool pool) throws Exception {
JsonFactory jsonFactory = new JsonFactory();
JsonParser jp = jsonFactory.createJsonParser(s);
if (jp.nextToken() != JsonToken.START_OBJECT) {
return null;
}
return loadStreaming(jp, pool);
}
static public Cell loadStreaming(JsonParser jp, Pool pool) throws Exception {
JsonToken t = jp.getCurrentToken();
if (t == JsonToken.VALUE_NULL || t != JsonToken.START_OBJECT) {
return null;
}
Serializable value = null;
String type = null;
Recon recon = null;
while (jp.nextToken() != JsonToken.END_OBJECT) {
String fieldName = jp.getCurrentName();
jp.nextToken();
if ("r".equals(fieldName)) {
if (jp.getCurrentToken() == JsonToken.VALUE_STRING) {
String reconID = jp.getText();
recon = pool.getRecon(reconID);
} else {
// legacy
recon = Recon.loadStreaming(jp, pool);
}
} else if ("e".equals(fieldName)) {
value = new EvalError(jp.getText());
} else if ("v".equals(fieldName)) {
JsonToken token = jp.getCurrentToken();
if (token == JsonToken.VALUE_STRING) {
value = jp.getText();
} else if (token == JsonToken.VALUE_NUMBER_INT) {
value = jp.getLongValue();
} else if (token == JsonToken.VALUE_NUMBER_FLOAT) {
value = jp.getDoubleValue();
} else if (token == JsonToken.VALUE_TRUE) {
value = true;
} else if (token == JsonToken.VALUE_FALSE) {
value = false;
}
} else if ("t".equals(fieldName)) {
type = jp.getText();
}
}
if (value != null) {
if (type != null && "date".equals(type)) {
value = ParsingUtilities.stringToDate((String) value);
}
return new Cell(value, recon);
} else {
return null;
}
}
@Override
public String toString() {
return value.toString();
}
}