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* [#294] Implement onehot_encoding UDAF * Updated hive version dependencies from v0.12.0 to v0.13.0 * Updated onehot_encoding UDAF * Fixed compilation errors for API changes of Hive v0.13.0 * Avoided NPE in org.apache.hadoop.hive.conf.HiveConf.getVar(HiveConf.java:1295) * Ignored a test to support Hive v0.13.0
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core/src/main/java/hivemall/ftvec/trans/OnehotEncodingUDAF.java
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| /* | ||
| * Hivemall: Hive scalable Machine Learning Library | ||
| * | ||
| * Copyright (C) 2016 Makoto YUI | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package hivemall.ftvec.trans; | ||
|
|
||
| import hivemall.utils.hadoop.HiveUtils; | ||
| import hivemall.utils.hadoop.WritableUtils; | ||
| import hivemall.utils.lang.Identifier; | ||
| import hivemall.utils.lang.Preconditions; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Set; | ||
|
|
||
| import javax.annotation.CheckForNull; | ||
| import javax.annotation.Nonnull; | ||
| import javax.annotation.Nullable; | ||
|
|
||
| import org.apache.hadoop.hive.ql.exec.Description; | ||
| import org.apache.hadoop.hive.ql.exec.UDFArgumentException; | ||
| import org.apache.hadoop.hive.ql.exec.UDFArgumentTypeException; | ||
| import org.apache.hadoop.hive.ql.metadata.HiveException; | ||
| import org.apache.hadoop.hive.ql.parse.SemanticException; | ||
| import org.apache.hadoop.hive.ql.udf.UDFType; | ||
| import org.apache.hadoop.hive.ql.udf.generic.AbstractGenericUDAFResolver; | ||
| import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator; | ||
| import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AbstractAggregationBuffer; | ||
| import org.apache.hadoop.hive.serde2.objectinspector.ListObjectInspector; | ||
| import org.apache.hadoop.hive.serde2.objectinspector.MapObjectInspector; | ||
| import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector; | ||
| import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory; | ||
| import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils; | ||
| import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils.ObjectInspectorCopyOption; | ||
| import org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector; | ||
| import org.apache.hadoop.hive.serde2.objectinspector.StructField; | ||
| import org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspector; | ||
| import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory; | ||
| import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo; | ||
| import org.apache.hadoop.io.Writable; | ||
|
|
||
| @Description(name = "onehot_encoding", | ||
| value = "_FUNC_(PRIMITIVE feature, ...) - Compute onehot encoded label for each feature") | ||
| @UDFType(deterministic = true, stateful = true) | ||
| public final class OnehotEncodingUDAF extends AbstractGenericUDAFResolver { | ||
|
|
||
| public OnehotEncodingUDAF() { | ||
| super(); | ||
| } | ||
|
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| @Override | ||
| public GenericUDAFEvaluator getEvaluator(@Nonnull TypeInfo[] argTypes) throws SemanticException { | ||
| final int numFeatures = argTypes.length; | ||
| if (numFeatures == 0) { | ||
| throw new UDFArgumentException("_FUNC_ requires at least 1 argument"); | ||
| } | ||
| for (int i = 0; i < numFeatures; i++) { | ||
| if (argTypes[i] == null) { | ||
| throw new UDFArgumentTypeException(i, | ||
| "Null type is found. Only primitive type arguments are accepted."); | ||
| } | ||
| if (argTypes[i].getCategory() != ObjectInspector.Category.PRIMITIVE) { | ||
| throw new UDFArgumentTypeException(i, | ||
| "Only primitive type arguments are accepted but " + argTypes[i].getTypeName() | ||
| + " was passed as parameter 1."); | ||
| } | ||
| } | ||
|
|
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| return new GenericUDAFOnehotEncodingEvaluator(); | ||
| } | ||
|
|
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| public static final class GenericUDAFOnehotEncodingEvaluator extends GenericUDAFEvaluator { | ||
|
|
||
| // input OI | ||
| private PrimitiveObjectInspector[] inputElemOIs; | ||
| // merge input OI | ||
| private StructObjectInspector mergeOI; | ||
| private StructField[] fields; | ||
| private ListObjectInspector[] fieldOIs; | ||
|
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| public GenericUDAFOnehotEncodingEvaluator() {} | ||
|
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| @Override | ||
| public ObjectInspector init(Mode m, ObjectInspector[] argOIs) throws HiveException { | ||
| super.init(m, argOIs); | ||
|
|
||
| // initialize input | ||
| if (m == Mode.PARTIAL1 || m == Mode.COMPLETE) {// from original data | ||
| this.inputElemOIs = new PrimitiveObjectInspector[argOIs.length]; | ||
| for (int i = 0; i < argOIs.length; i++) { | ||
| inputElemOIs[i] = HiveUtils.asPrimitiveObjectInspector(argOIs[i]); | ||
| } | ||
| } else {// from partial aggregation | ||
| Preconditions.checkArgument(argOIs.length == 1); | ||
| this.mergeOI = HiveUtils.asStructOI(argOIs[0]); | ||
| final int numFields = mergeOI.getAllStructFieldRefs().size(); | ||
| this.fields = new StructField[numFields]; | ||
| this.fieldOIs = new ListObjectInspector[numFields]; | ||
| this.inputElemOIs = new PrimitiveObjectInspector[numFields]; | ||
| for (int i = 0; i < numFields; i++) { | ||
| StructField field = mergeOI.getStructFieldRef("f" + String.valueOf(i)); | ||
| fields[i] = field; | ||
| ListObjectInspector fieldOI = HiveUtils.asListOI(field.getFieldObjectInspector()); | ||
| fieldOIs[i] = fieldOI; | ||
| inputElemOIs[i] = HiveUtils.asPrimitiveObjectInspector(fieldOI.getListElementObjectInspector()); | ||
| } | ||
| } | ||
|
|
||
| // initialize output | ||
| final ObjectInspector outputOI; | ||
| switch (m) { | ||
| case PARTIAL1:// from original data to partial aggregation data | ||
| outputOI = internalMergeOutputOI(inputElemOIs); | ||
| break; | ||
| case PARTIAL2:// from partial aggregation data to partial aggregation data | ||
| outputOI = internalMergeOutputOI(inputElemOIs); | ||
| break; | ||
| case COMPLETE:// from original data directly to full aggregation | ||
| outputOI = terminalOutputOI(inputElemOIs); | ||
| break; | ||
| case FINAL: // from partial aggregation to full aggregation | ||
| outputOI = terminalOutputOI(inputElemOIs); | ||
| break; | ||
| default: | ||
| throw new IllegalStateException("Illegal mode: " + m); | ||
| } | ||
| return outputOI; | ||
| } | ||
|
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| @Nonnull | ||
| private static StructObjectInspector internalMergeOutputOI( | ||
| @CheckForNull PrimitiveObjectInspector[] inputOIs) throws UDFArgumentException { | ||
| Preconditions.checkNotNull(inputOIs); | ||
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| final int numOIs = inputOIs.length; | ||
| final List<String> fieldNames = new ArrayList<String>(numOIs); | ||
| final List<ObjectInspector> fieldOIs = new ArrayList<ObjectInspector>(numOIs); | ||
| for (int i = 0; i < numOIs; i++) { | ||
| fieldNames.add("f" + String.valueOf(i)); | ||
| ObjectInspector elemOI = ObjectInspectorUtils.getStandardObjectInspector( | ||
| inputOIs[i], ObjectInspectorCopyOption.WRITABLE); | ||
| ListObjectInspector listOI = ObjectInspectorFactory.getStandardListObjectInspector(elemOI); | ||
| fieldOIs.add(listOI); | ||
| } | ||
| return ObjectInspectorFactory.getStandardStructObjectInspector(fieldNames, fieldOIs); | ||
| } | ||
|
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| @Nonnull | ||
| private static StructObjectInspector terminalOutputOI( | ||
| @CheckForNull PrimitiveObjectInspector[] inputOIs) { | ||
| Preconditions.checkNotNull(inputOIs); | ||
| Preconditions.checkArgument(inputOIs.length >= 1, inputOIs.length); | ||
|
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| final List<String> fieldNames = new ArrayList<>(inputOIs.length); | ||
| final List<ObjectInspector> fieldOIs = new ArrayList<>(inputOIs.length); | ||
| for (int i = 0; i < inputOIs.length; i++) { | ||
| fieldNames.add("f" + String.valueOf(i + 1)); | ||
| ObjectInspector keyOI = ObjectInspectorUtils.getStandardObjectInspector( | ||
| inputOIs[i], ObjectInspectorCopyOption.WRITABLE); | ||
| MapObjectInspector mapOI = ObjectInspectorFactory.getStandardMapObjectInspector( | ||
| keyOI, PrimitiveObjectInspectorFactory.javaIntObjectInspector); | ||
| fieldOIs.add(mapOI); | ||
| } | ||
| return ObjectInspectorFactory.getStandardStructObjectInspector(fieldNames, fieldOIs); | ||
| } | ||
|
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| @SuppressWarnings("deprecation") | ||
| @Override | ||
| public AggregationBuffer getNewAggregationBuffer() throws HiveException { | ||
| EncodingBuffer buf = new EncodingBuffer(); | ||
| reset(buf); | ||
| return buf; | ||
| } | ||
|
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| @SuppressWarnings("deprecation") | ||
| @Override | ||
| public void reset(AggregationBuffer aggregationBuffer) throws HiveException { | ||
| EncodingBuffer buf = (EncodingBuffer) aggregationBuffer; | ||
| buf.reset(); | ||
| } | ||
|
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| @SuppressWarnings("deprecation") | ||
| @Override | ||
| public void iterate(AggregationBuffer aggregationBuffer, Object[] parameters) | ||
| throws HiveException { | ||
| Preconditions.checkNotNull(inputElemOIs); | ||
|
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| EncodingBuffer buf = (EncodingBuffer) aggregationBuffer; | ||
| buf.iterate(parameters, inputElemOIs); | ||
| } | ||
|
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| @SuppressWarnings("deprecation") | ||
| @Override | ||
| public Object[] terminatePartial(AggregationBuffer aggregationBuffer) throws HiveException { | ||
| EncodingBuffer buf = (EncodingBuffer) aggregationBuffer; | ||
| return buf.partial(); | ||
| } | ||
|
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| @SuppressWarnings("deprecation") | ||
| @Override | ||
| public void merge(AggregationBuffer aggregationBuffer, Object partial) throws HiveException { | ||
| if (partial == null) { | ||
| return; | ||
| } | ||
|
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| EncodingBuffer buf = (EncodingBuffer) aggregationBuffer; | ||
| buf.merge(partial, mergeOI, fields, fieldOIs); | ||
| } | ||
|
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| @SuppressWarnings("deprecation") | ||
| @Override | ||
| public Object[] terminate(AggregationBuffer aggregationBuffer) throws HiveException { | ||
| EncodingBuffer buf = (EncodingBuffer) aggregationBuffer; | ||
| return buf.terminate(); | ||
| } | ||
| } | ||
|
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| public static final class EncodingBuffer extends AbstractAggregationBuffer { | ||
|
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| @Nullable | ||
| private Identifier<Writable>[] identifiers; | ||
|
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| public EncodingBuffer() {} | ||
|
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| void reset() { | ||
| this.identifiers = null; | ||
| } | ||
|
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| @SuppressWarnings("unchecked") | ||
| void iterate(@Nonnull final Object[] args, | ||
| @Nonnull final PrimitiveObjectInspector[] inputOIs) throws HiveException { | ||
| Preconditions.checkArgument(args.length == inputOIs.length); | ||
|
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| final int length = args.length; | ||
| if (identifiers == null) { | ||
| this.identifiers = new Identifier[length]; | ||
| for (int i = 0; i < length; i++) { | ||
| identifiers[i] = new Identifier<>(1); | ||
| } | ||
| } | ||
|
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| for (int i = 0; i < length; i++) { | ||
| Object arg = args[i]; | ||
| if (arg == null) { | ||
| continue; | ||
| } | ||
| Writable writable = WritableUtils.copyToWritable(arg, inputOIs[i]); | ||
| identifiers[i].put(writable); | ||
| } | ||
| } | ||
|
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| @Nullable | ||
| Object[] partial() throws HiveException { | ||
| if (identifiers == null) { | ||
| return null; | ||
| } | ||
|
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| final int length = identifiers.length; | ||
| final Object[] partial = new Object[length]; | ||
| for (int i = 0; i < length; i++) { | ||
| Set<Writable> id = identifiers[i].getMap().keySet(); | ||
| final List<Writable> list = new ArrayList<Writable>(id.size()); | ||
| for (Writable e : id) { | ||
| Preconditions.checkNotNull(e); | ||
| list.add(e); | ||
| } | ||
| partial[i] = list; | ||
| } | ||
| return partial; | ||
| } | ||
|
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| @SuppressWarnings("unchecked") | ||
| void merge(@Nonnull final Object partial, @Nonnull final StructObjectInspector mergeOI, | ||
| @Nonnull final StructField[] fields, @Nonnull final ListObjectInspector[] fieldOIs) { | ||
| Preconditions.checkArgument(fields.length == fieldOIs.length); | ||
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| final int numFields = fieldOIs.length; | ||
| if (identifiers == null) { | ||
| this.identifiers = new Identifier[numFields]; | ||
| } | ||
| Preconditions.checkArgument(fields.length == identifiers.length); | ||
|
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| for (int i = 0; i < numFields; i++) { | ||
| Identifier<Writable> id = identifiers[i]; | ||
| if (id == null) { | ||
| id = new Identifier<>(1); | ||
| identifiers[i] = id; | ||
| } | ||
| final Object fieldData = mergeOI.getStructFieldData(partial, fields[i]); | ||
| final ListObjectInspector fieldOI = fieldOIs[i]; | ||
| for (int j = 0, size = fieldOI.getListLength(fieldData); j < size; j++) { | ||
| Object o = fieldOI.getListElement(fieldData, j); | ||
| Preconditions.checkNotNull(o); | ||
| id.valueOf((Writable) o); | ||
| } | ||
| } | ||
| } | ||
|
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| @Nullable | ||
| Object[] terminate() { | ||
| if (identifiers == null) { | ||
| return null; | ||
| } | ||
| final Object[] ret = new Object[identifiers.length]; | ||
| int max = 0; | ||
| for (int i = 0; i < identifiers.length; i++) { | ||
| final Map<Writable, Integer> m = identifiers[i].getMap(); | ||
| if (max != 0) { | ||
| for (Map.Entry<Writable, Integer> e : m.entrySet()) { | ||
| int original = e.getValue().intValue(); | ||
| e.setValue(Integer.valueOf(max + original)); | ||
| } | ||
| } | ||
| ret[i] = m; | ||
| max += m.size(); | ||
| } | ||
| return ret; | ||
| } | ||
|
|
||
| } | ||
| } |
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