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org.apache.lens.ml
Class HiveMLUDF

java.lang.Object
  org.apache.hadoop.hive.ql.udf.generic.GenericUDF
      org.apache.lens.ml.HiveMLUDF

All Implemented Interfaces:

Closeable

public final class HiveMLUDF
extends org.apache.hadoop.hive.ql.udf.generic.GenericUDF

Generic UDF to laod ML Models saved in HDFS and apply the model on list of columns passed as argument.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

org.apache.hadoop.hive.ql.udf.generic.GenericUDF.DeferredJavaObject, org.apache.hadoop.hive.ql.udf.generic.GenericUDF.DeferredObject

Field Summary

static org.apache.commons.logging.Log	LOG The Constant LOG.
static String	UDF_NAME The Constant UDF_NAME.

Method Summary

void	configure(org.apache.hadoop.hive.ql.exec.MapredContext context)
Object	evaluate(org.apache.hadoop.hive.ql.udf.generic.GenericUDF.DeferredObject[] deferredObjects)
String	getDisplayString(String[] strings)
org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector	initialize(org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector[] objectInspectors) Currently we only support double as the return value.

Methods inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

close, copyToNewInstance, flip, getRequiredFiles, getRequiredJars, getUdfName, initializeAndFoldConstants

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

UDF_NAME

public static final String UDF_NAME

The Constant UDF_NAME.

See Also:

Constant Field Values

LOG

public static final org.apache.commons.logging.Log LOG

The Constant LOG.

Method Detail

initialize

public org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector initialize(org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector[] objectInspectors)
                                                                         throws org.apache.hadoop.hive.ql.exec.UDFArgumentException

Currently we only support double as the return value.

Specified by:

initialize in class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

Parameters:

objectInspectors - the object inspectors

Returns:

the object inspector

Throws:

org.apache.hadoop.hive.ql.exec.UDFArgumentException - the UDF argument exception

evaluate

public Object evaluate(org.apache.hadoop.hive.ql.udf.generic.GenericUDF.DeferredObject[] deferredObjects)
                throws org.apache.hadoop.hive.ql.metadata.HiveException

Specified by:

evaluate in class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

Throws:

org.apache.hadoop.hive.ql.metadata.HiveException

getDisplayString

public String getDisplayString(String[] strings)

Specified by:

getDisplayString in class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

configure

public void configure(org.apache.hadoop.hive.ql.exec.MapredContext context)

Overrides:

configure in class org.apache.hadoop.hive.ql.udf.generic.GenericUDF