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///*
//* Copyright (c) 2009 Concurrent, Inc.
//*
//* This work has been released into the public domain
//* by the copyright holder. This applies worldwide.
//*
//* In case this is not legally possible:
//* The copyright holder grants any entity the right
//* to use this work for any purpose, without any
//* conditions, unless such conditions are required by law.
//*/
//
//package parallelai.spyglass.hbase;
//
//import java.io.IOException;
//import java.util.Arrays;
//import java.util.HashSet;
//
//import org.apache.hadoop.hbase.client.Put;
//import org.apache.hadoop.hbase.client.Result;
//import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
//import org.apache.hadoop.hbase.mapred.TableOutputFormat;
//import org.apache.hadoop.hbase.util.Bytes;
//import org.apache.hadoop.mapred.JobConf;
//import org.apache.hadoop.mapred.OutputCollector;
//import org.apache.hadoop.mapred.RecordReader;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
//
//import com.twitter.elephantbird.mapred.input.DeprecatedInputFormatValueCopier;
//import com.twitter.elephantbird.mapred.input.DeprecatedInputFormatWrapper;
//
//import cascading.flow.FlowProcess;
//import cascading.scheme.Scheme;
//import cascading.scheme.SinkCall;
//import cascading.scheme.SourceCall;
//import cascading.tap.Tap;
//import cascading.tuple.Fields;
//import cascading.tuple.Tuple;
//import cascading.tuple.TupleEntry;
//import cascading.util.Util;
//
///**
//* The HBaseRawScheme class is a {@link Scheme} subclass. It is used in conjunction
//* with the {@HBaseRawTap} to allow for the reading and writing of data
//* to and from a HBase cluster.
//*
//* @see HBaseRawTap
//*/
//@SuppressWarnings({ "rawtypes", "deprecation" })
//public class HBaseRawScheme extends Scheme<JobConf, RecordReader, OutputCollector, Object[], Object[]> {
// /**
// *
// */
// private static final long serialVersionUID = 6248976486883281356L;
//
// /** Field LOG */
// private static final Logger LOG = LoggerFactory.getLogger(HBaseRawScheme.class);
//
// public final Fields RowKeyField = new Fields("rowkey");
// public final Fields RowField = new Fields("row");
//
// /** String familyNames */
// private String[] familyNames;
//
// private boolean writeNulls = true;
//
// /**
// * Constructor HBaseScheme creates a new HBaseScheme instance.
// *
// * @param keyFields
// * of type Fields
// * @param familyName
// * of type String
// * @param valueFields
// * of type Fields
// */
// public HBaseRawScheme(String familyName) {
// this(new String[] { familyName });
// }
//
// public HBaseRawScheme(String[] familyNames) {
// this.familyNames = familyNames;
// setSourceFields();
// }
//
// public HBaseRawScheme(String familyName, boolean writeNulls) {
// this(new String[] { familyName }, writeNulls);
// }
//
// public HBaseRawScheme(String[] familyNames, boolean writeNulls) {
// this.familyNames = familyNames;
// this.writeNulls = writeNulls;
// setSourceFields();
// }
//
// private void setSourceFields() {
// Fields sourceFields = Fields.join(RowKeyField, RowField);
// setSourceFields(sourceFields);
// }
//
// /**
// * Method getFamilyNames returns the set of familyNames of this HBaseScheme
// * object.
// *
// * @return the familyNames (type String[]) of this HBaseScheme object.
// */
// public String[] getFamilyNames() {
// HashSet<String> familyNameSet = new HashSet<String>();
// if (familyNames != null) {
// for (String familyName : familyNames) {
// familyNameSet.add(familyName);
// }
// }
// return familyNameSet.toArray(new String[0]);
// }
//
// @Override
// public void sourcePrepare(FlowProcess<JobConf> flowProcess, SourceCall<Object[], RecordReader> sourceCall) {
// Object[] pair = new Object[] { sourceCall.getInput().createKey(), sourceCall.getInput().createValue() };
//
// sourceCall.setContext(pair);
// }
//
// @Override
// public void sourceCleanup(FlowProcess<JobConf> flowProcess, SourceCall<Object[], RecordReader> sourceCall) {
// sourceCall.setContext(null);
// }
//
// @SuppressWarnings("unchecked")
// @Override
// public boolean source(FlowProcess<JobConf> flowProcess, SourceCall<Object[], RecordReader> sourceCall)
// throws IOException {
// Tuple result = new Tuple();
//
// Object key = sourceCall.getContext()[0];
// Object value = sourceCall.getContext()[1];
// boolean hasNext = sourceCall.getInput().next(key, value);
// if (!hasNext) {
// return false;
// }
//
// // Skip nulls
// if (key == null || value == null) {
// return true;
// }
//
// ImmutableBytesWritable keyWritable = (ImmutableBytesWritable) key;
// Result row = (Result) value;
// result.add(keyWritable);
// result.add(row);
// sourceCall.getIncomingEntry().setTuple(result);
// return true;
// }
//
// @SuppressWarnings("unchecked")
// @Override
// public void sink(FlowProcess<JobConf> flowProcess, SinkCall<Object[], OutputCollector> sinkCall) throws IOException {
// TupleEntry tupleEntry = sinkCall.getOutgoingEntry();
// OutputCollector outputCollector = sinkCall.getOutput();
// Tuple key = tupleEntry.selectTuple(RowKeyField);
// Object okey = key.getObject(0);
// ImmutableBytesWritable keyBytes = getBytes(okey);
// Put put = new Put(keyBytes.get());
// Fields outFields = tupleEntry.getFields().subtract(RowKeyField);
// if (null != outFields) {
// TupleEntry values = tupleEntry.selectEntry(outFields);
// for (int n = 0; n < values.getFields().size(); n++) {
// Object o = values.get(n);
// ImmutableBytesWritable valueBytes = getBytes(o);
// Comparable field = outFields.get(n);
// ColumnName cn = parseColumn((String) field);
// if (null == cn.family) {
// if (n >= familyNames.length)
// cn.family = familyNames[familyNames.length - 1];
// else
// cn.family = familyNames[n];
// }
// if (null != o || writeNulls)
// put.add(Bytes.toBytes(cn.family), Bytes.toBytes(cn.name), valueBytes.get());
// }
// }
// outputCollector.collect(null, put);
// }
//
// private ImmutableBytesWritable getBytes(Object obj) {
// if (null == obj)
// return new ImmutableBytesWritable(new byte[0]);
// if (obj instanceof ImmutableBytesWritable)
// return (ImmutableBytesWritable) obj;
// else if (obj instanceof String)
// return new ImmutableBytesWritable(Bytes.toBytes((String) obj));
// else if (obj instanceof Long)
// return new ImmutableBytesWritable(Bytes.toBytes((Long) obj));
// else if (obj instanceof Integer)
// return new ImmutableBytesWritable(Bytes.toBytes((Integer) obj));
// else if (obj instanceof Short)
// return new ImmutableBytesWritable(Bytes.toBytes((Short) obj));
// else if (obj instanceof Boolean)
// return new ImmutableBytesWritable(Bytes.toBytes((Boolean) obj));
// else if (obj instanceof Double)
// return new ImmutableBytesWritable(Bytes.toBytes((Double) obj));
// else
// throw new IllegalArgumentException("cannot convert object to ImmutableBytesWritable, class="
// + obj.getClass().getName());
// }
//
// private ColumnName parseColumn(String column) {
// ColumnName ret = new ColumnName();
// int pos = column.indexOf(":");
// if (pos > 0) {
// ret.name = column.substring(pos + 1);
// ret.family = column.substring(0, pos);
// } else {
// ret.name = column;
// }
// return ret;
// }
//
// private class ColumnName {
// String family;
// String name;
//
// ColumnName() {
// }
// }
//
// @Override
// public void sinkConfInit(FlowProcess<JobConf> process, Tap<JobConf, RecordReader, OutputCollector> tap, JobConf conf) {
// conf.setOutputFormat(TableOutputFormat.class);
// conf.setOutputKeyClass(ImmutableBytesWritable.class);
// conf.setOutputValueClass(Put.class);
// }
//
// @Override
// public void sourceConfInit(FlowProcess<JobConf> process, Tap<JobConf, RecordReader, OutputCollector> tap,
// JobConf conf) {
// DeprecatedInputFormatWrapper.setInputFormat(org.apache.hadoop.hbase.mapreduce.TableInputFormat.class, conf,
// ValueCopier.class);
// if (null != familyNames) {
// String columns = Util.join(this.familyNames, " ");
// LOG.debug("sourcing from column families: {}", columns);
// conf.set(org.apache.hadoop.hbase.mapreduce.TableInputFormat.SCAN_COLUMNS, columns);
// }
// }
//
// @Override
// public boolean equals(Object object) {
// if (this == object) {
// return true;
// }
// if (object == null || getClass() != object.getClass()) {
// return false;
// }
// if (!super.equals(object)) {
// return false;
// }
//
// HBaseRawScheme that = (HBaseRawScheme) object;
//
// if (!Arrays.equals(familyNames, that.familyNames)) {
// return false;
// }
// return true;
// }
//
// @Override
// public int hashCode() {
// int result = super.hashCode();
// result = 31 * result + (familyNames != null ? Arrays.hashCode(familyNames) : 0);
// return result;
// }
//
// public static class ValueCopier implements DeprecatedInputFormatValueCopier<Result> {
//
// public ValueCopier() {
// }
//
// public void copyValue(Result oldValue, Result newValue) {
// if (null != oldValue && null != newValue) {
// oldValue.copyFrom(newValue);
// }
// }
//
// }
//}
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