[
https://issues.apache.org/jira/browse/PIG-1896?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jonathan Holloway updated PIG-1896:
-----------------------------------
Status: Patch Available (was: Open)
### Eclipse Workspace Patch 1.0
#P pig
Index: src/org/apache/pig/impl/util/CastUtils.java
===================================================================
--- src/org/apache/pig/impl/util/CastUtils.java (revision 1080348)
+++ src/org/apache/pig/impl/util/CastUtils.java (working copy)
@@ -21,6 +21,7 @@
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.pig.PigWarning;
+import org.apache.pig.data.DataType;
public class CastUtils {
@@ -154,5 +155,31 @@
}
}
}
+
+ /**
+ * Converts a value to the correct Java data type based on the byte value
for {@link DataType}.
+ * @param dataType is the datatype byte value to convert the value to
+ * @param value is the text value to convert
+ * @return the corresponding datatype, defaulting to a {@link
java.lang.String} for other types.
+ */
+ public static Object convert(String value, byte dataType) {
+
+ switch (dataType) {
+ case DataType.BOOLEAN:
+ return new Boolean(value);
+ case DataType.BYTE:
+ return new Byte(value);
+ case DataType.INTEGER:
+ return CastUtils.stringToInteger(value);
+ case DataType.LONG:
+ return CastUtils.stringToLong(value);
+ case DataType.FLOAT:
+ return CastUtils.stringToFloat(value);
+ case DataType.DOUBLE:
+ return CastUtils.stringToDouble(value);
+ default:
+ return value;
+ }
+ }
}
> CastUtils - Converting Pig DataTypes to Java Data Types
> -------------------------------------------------------
>
> Key: PIG-1896
> URL: https://issues.apache.org/jira/browse/PIG-1896
> Project: Pig
> Issue Type: Improvement
> Components: impl
> Affects Versions: 0.8.0
> Reporter: Jonathan Holloway
> Priority: Minor
>
> I ran into an issue with parsing log lines whereby I had to generate a schema
> in a user defined function. Part of that involved converting various values
> into their associated data types, but I couldn't see a way to do it via Pig.
> Enclosed is a patch to convert org.apache.pig.data.DataType into an
> associated Java datatype falling back to a String by default - should go into
> CastUtils. Any comments/criticism, please let me know.
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