// This file was automatically generated with the command: 

 //     java org.galagosearch.tupleflow.typebuilder.TypeBuilderMojo ...

 package org.galagosearch.core.types;

 import org.galagosearch.tupleflow.Utility;

 import org.galagosearch.tupleflow.ArrayInput;

 import org.galagosearch.tupleflow.ArrayOutput;

 import org.galagosearch.tupleflow.Order;   

 import org.galagosearch.tupleflow.OrderedWriter;

 import org.galagosearch.tupleflow.Type; 

 import org.galagosearch.tupleflow.TypeReader;

 import org.galagosearch.tupleflow.Step; 

 import org.galagosearch.tupleflow.IncompatibleProcessorException;

 import org.galagosearch.tupleflow.ReaderSource;

 import java.io.IOException;             

 import java.io.EOFException;

 import java.io.UnsupportedEncodingException;

 import java.util.ArrayList;

 import java.util.Arrays;   

 import java.util.Comparator;

 import java.util.PriorityQueue;

 import java.util.Collection;

 public class DocumentSplit implements Type<DocumentSplit> {

     public String fileName;

     public String fileType;

     public boolean isCompressed;

     public byte[] startKey;

     public byte[] endKey; 

     public DocumentSplit() {}

     public DocumentSplit(String fileName, String fileType, boolean isCompressed, byte[] startKey, byte[] endKey) {

         this.fileName = fileName;

         this.fileType = fileType;

         this.isCompressed = isCompressed;

         this.startKey = startKey;

         this.endKey = endKey;

     }  

     public String toString() {

         try {

             return String.format("%s,%s,%b,%s,%s",

                                    fileName, fileType, isCompressed, new String(startKey, "UTF-8"), new String(endKey, "UTF-8"));

         } catch(UnsupportedEncodingException e) {

             throw new RuntimeException("Couldn't convert string to UTF-8.");

         }

     } 

     public Order<DocumentSplit> getOrder(String... spec) {

         if (Arrays.equals(spec, new String[] {  })) {

             return new Unordered();

         }

         if (Arrays.equals(spec, new String[] { "+fileName", "+startKey" })) {

             return new FileNameStartKeyOrder();

         }

         return null;

     } 

     public interface Processor extends Step, org.galagosearch.tupleflow.Processor<DocumentSplit> {

         public void process(DocumentSplit object) throws IOException;

         public void close() throws IOException;

     }                        

     public interface Source extends Step {

     }

     public static class Unordered implements Order<DocumentSplit> {

         public int hash(DocumentSplit object) {

             int h = 0;

             return h;

         } 

         public Comparator<DocumentSplit> greaterThan() {

             return new Comparator<DocumentSplit>() {

                 public int compare(DocumentSplit one, DocumentSplit two) {

                     int result = 0;

                     do {

                     } while (false);

                     return -result;

                 }

             };

         }     

         public Comparator<DocumentSplit> lessThan() {

             return new Comparator<DocumentSplit>() {

                 public int compare(DocumentSplit one, DocumentSplit two) {

                     int result = 0;

                     do {

                     } while (false);

                     return result;

                 }

             };

         }     

         public TypeReader<DocumentSplit> orderedReader(ArrayInput _input) {

             return new ShreddedReader(_input);

         }    

         public TypeReader<DocumentSplit> orderedReader(ArrayInput _input, int bufferSize) {

             return new ShreddedReader(_input, bufferSize);

         }    

         public OrderedWriter<DocumentSplit> orderedWriter(ArrayOutput _output) {

             ShreddedWriter w = new ShreddedWriter(_output);

             return new OrderedWriterClass(w); 

         }                                    

         public static class OrderedWriterClass extends OrderedWriter< DocumentSplit > {

             DocumentSplit last = null;

             ShreddedWriter shreddedWriter = null; 

             public OrderedWriterClass(ShreddedWriter s) {

                 this.shreddedWriter = s;

             }

             public void process(DocumentSplit object) throws IOException {

                boolean processAll = false;

                shreddedWriter.processTuple(object.fileName, object.fileType, object.isCompressed, object.startKey, object.endKey);

                last = object;

             }           

             public void close() throws IOException {

                 shreddedWriter.close();

             }

             public Class<DocumentSplit> getInputClass() {

                 return DocumentSplit.class;

             }

         } 

         public ReaderSource<DocumentSplit> orderedCombiner(Collection<TypeReader<DocumentSplit>> readers, boolean closeOnExit) {

             ArrayList<ShreddedReader> shreddedReaders = new ArrayList();

             for (TypeReader<DocumentSplit> reader : readers) {

                 shreddedReaders.add((ShreddedReader)reader);

             }

             return new ShreddedCombiner(shreddedReaders, closeOnExit);

         }                  

         public DocumentSplit clone(DocumentSplit object) {

             DocumentSplit result = new DocumentSplit();

             if (object == null) return result;

             result.fileName = object.fileName; 

             result.fileType = object.fileType; 

             result.isCompressed = object.isCompressed; 

             result.startKey = object.startKey; 

             result.endKey = object.endKey; 

             return result;

         }                 

         public Class<DocumentSplit> getOrderedClass() {

             return DocumentSplit.class;

         }                           

         public String[] getOrderSpec() {

             return new String[] {};

         }

         public static String getSpecString() {

             return "";

         }

         public interface ShreddedProcessor extends Step {

             public void processTuple(String fileName, String fileType, boolean isCompressed, byte[] startKey, byte[] endKey) throws IOException;

             public void close() throws IOException;

         }    

         public interface ShreddedSource extends Step {

         }                                              

         public static class ShreddedWriter implements ShreddedProcessor {

             ArrayOutput output;

             ShreddedBuffer buffer = new ShreddedBuffer();

             boolean lastFlush = false;

             public ShreddedWriter(ArrayOutput output) {

                 this.output = output;

             }                        

             public void close() throws IOException {

                 flush();

             }

             public final void processTuple(String fileName, String fileType, boolean isCompressed, byte[] startKey, byte[] endKey) throws IOException {

                 if (lastFlush) {

                     lastFlush = false;

                 }

                 buffer.processTuple(fileName, fileType, isCompressed, startKey, endKey);

                 if (buffer.isFull())

                     flush();

             }

             public final void flushTuples(int pauseIndex) throws IOException {

                 while (buffer.getReadIndex() < pauseIndex) {

                     output.writeString(buffer.getFileName());

                     output.writeString(buffer.getFileType());

                     output.writeBoolean(buffer.getIsCompressed());

                     output.writeBytes(buffer.getStartKey());

                     output.writeBytes(buffer.getEndKey());

                     buffer.incrementTuple();

                 }

             }  

             public void flush() throws IOException { 

                 flushTuples(buffer.getWriteIndex());

                 buffer.reset(); 

                 lastFlush = true;

             }                           

         }

         public static class ShreddedBuffer {

             String[] fileNames;

             String[] fileTypes;

             boolean[] isCompresseds;

             byte[][] startKeys;

             byte[][] endKeys;

             int writeTupleIndex = 0;

             int readTupleIndex = 0;

             int batchSize;

             public ShreddedBuffer(int batchSize) {

                 this.batchSize = batchSize;

                 fileNames = new String[batchSize];

                 fileTypes = new String[batchSize];

                 isCompresseds = new boolean[batchSize];

                 startKeys = new byte[batchSize][];

                 endKeys = new byte[batchSize][];

             }                              

             public ShreddedBuffer() {    

                 this(10000);

             }                                                                                                                    

             public void processTuple(String fileName, String fileType, boolean isCompressed, byte[] startKey, byte[] endKey) {

                 fileNames[writeTupleIndex] = fileName;

                 fileTypes[writeTupleIndex] = fileType;

                 isCompresseds[writeTupleIndex] = isCompressed;

                 startKeys[writeTupleIndex] = startKey;

                 endKeys[writeTupleIndex] = endKey;

                 writeTupleIndex++;

             }

             public void resetData() {

                 writeTupleIndex = 0;

             }                  

             public void resetRead() {

                 readTupleIndex = 0;

             } 

             public void reset() {

                 resetData();

                 resetRead();

             } 

             public boolean isFull() {

                 return writeTupleIndex >= batchSize;

             }

             public boolean isEmpty() {

                 return writeTupleIndex == 0;

             }                          

             public boolean isAtEnd() {

                 return readTupleIndex >= writeTupleIndex;

             }           

             public void incrementTuple() {

                 readTupleIndex++;

             }                    

             public int getReadIndex() {

                 return readTupleIndex;

             }   

             public int getWriteIndex() {

                 return writeTupleIndex;

             } 

             public String getFileName() {

                 assert readTupleIndex < writeTupleIndex;

                 return fileNames[readTupleIndex];

             }                                         

             public String getFileType() {

                 assert readTupleIndex < writeTupleIndex;

                 return fileTypes[readTupleIndex];

             }                                         

             public boolean getIsCompressed() {

                 assert readTupleIndex < writeTupleIndex;

                 return isCompresseds[readTupleIndex];

             }                                         

             public byte[] getStartKey() {

                 assert readTupleIndex < writeTupleIndex;

                 return startKeys[readTupleIndex];

             }                                         

             public byte[] getEndKey() {

                 assert readTupleIndex < writeTupleIndex;

                 return endKeys[readTupleIndex];

             }                                         

             public void copyTuples(int endIndex, ShreddedProcessor output) throws IOException {

                 while (getReadIndex() < endIndex) {

                    output.processTuple(getFileName(), getFileType(), getIsCompressed(), getStartKey(), getEndKey());

                    incrementTuple();

                 }

             }                                                                           

             public void copyUntil(ShreddedBuffer other, ShreddedProcessor output) throws IOException {

             }

         }                         

         public static class ShreddedCombiner implements ReaderSource<DocumentSplit>, ShreddedSource {   

             public ShreddedProcessor processor;

             Collection<ShreddedReader> readers;       

             boolean closeOnExit = false;

             boolean uninitialized = true;

             PriorityQueue<ShreddedReader> queue = new PriorityQueue<ShreddedReader>();

             public ShreddedCombiner(Collection<ShreddedReader> readers, boolean closeOnExit) {

                 this.readers = readers;                                                       

                 this.closeOnExit = closeOnExit;

             }

             public void setProcessor(Step processor) throws IncompatibleProcessorException {  

                 if (processor instanceof ShreddedProcessor) {

                     this.processor = new DuplicateEliminator((ShreddedProcessor) processor);

                 } else if (processor instanceof DocumentSplit.Processor) {

                     this.processor = new DuplicateEliminator(new TupleUnshredder((DocumentSplit.Processor) processor));

                 } else if (processor instanceof org.galagosearch.tupleflow.Processor) {

                     this.processor = new DuplicateEliminator(new TupleUnshredder((org.galagosearch.tupleflow.Processor<DocumentSplit>) processor));

                 } else {

                     throw new IncompatibleProcessorException(processor.getClass().getName() + " is not supported by " + this.getClass().getName());                                                                       

                 }

             }                                

             public Class<DocumentSplit> getOutputClass() {

                 return DocumentSplit.class;

             }

             public void initialize() throws IOException {

                 for (ShreddedReader reader : readers) {

                     reader.fill();                                        

                     if (!reader.getBuffer().isAtEnd())

                         queue.add(reader);

                 }   

                 uninitialized = false;

             }

             public void run() throws IOException {

                 initialize();

                 while (queue.size() > 0) {

                     ShreddedReader top = queue.poll();

                     ShreddedReader next = null;

                     ShreddedBuffer nextBuffer = null; 

                     assert !top.getBuffer().isAtEnd();

                     if (queue.size() > 0) {

                         next = queue.peek();

                         nextBuffer = next.getBuffer();

                         assert !nextBuffer.isAtEnd();

                     }

                     top.getBuffer().copyUntil(nextBuffer, processor);

                     if (top.getBuffer().isAtEnd())

                         top.fill();                 

                     if (!top.getBuffer().isAtEnd())

                         queue.add(top);

                 }              

                 if (closeOnExit)

                     processor.close();

             }

             public DocumentSplit read() throws IOException {

                 if (uninitialized)

                     initialize();

                 DocumentSplit result = null;

                 while (queue.size() > 0) {

                     ShreddedReader top = queue.poll();

                     result = top.read();

                     if (result != null) {

                         if (top.getBuffer().isAtEnd())

                             top.fill();

                         queue.offer(top);

                         break;

                     } 

                 }

                 return result;

             }

         } 

         public static class ShreddedReader implements Step, Comparable<ShreddedReader>, TypeReader<DocumentSplit>, ShreddedSource {      

             public ShreddedProcessor processor;

             ShreddedBuffer buffer;

             DocumentSplit last = new DocumentSplit();         

             long tupleCount = 0;

             long bufferStartCount = 0;  

             ArrayInput input;

             public ShreddedReader(ArrayInput input) {

                 this.input = input; 

                 this.buffer = new ShreddedBuffer();

             }                               

             public ShreddedReader(ArrayInput input, int bufferSize) { 

                 this.input = input;

                 this.buffer = new ShreddedBuffer(bufferSize);

             }

             public final int compareTo(ShreddedReader other) {

                 ShreddedBuffer otherBuffer = other.getBuffer();

                 if (buffer.isAtEnd() && otherBuffer.isAtEnd()) {

                     return 0;                 

                 } else if (buffer.isAtEnd()) {

                     return -1;

                 } else if (otherBuffer.isAtEnd()) {

                     return 1;

                 }

                 int result = 0;

                 do {

                 } while (false);                                             

                 return result;

             }

             public final ShreddedBuffer getBuffer() {

                 return buffer;

             }                

             public final DocumentSplit read() throws IOException {

                 if (buffer.isAtEnd()) {

                     fill();             

                     if (buffer.isAtEnd()) {

                         return null;

                     }

                 }

                 assert !buffer.isAtEnd();

                 DocumentSplit result = new DocumentSplit();

                 result.fileName = buffer.getFileName();

                 result.fileType = buffer.getFileType();

                 result.isCompressed = buffer.getIsCompressed();

                 result.startKey = buffer.getStartKey();

                 result.endKey = buffer.getEndKey();

                 buffer.incrementTuple();

                 return result;

             }           

             public final void fill() throws IOException {

                 try {   

                     buffer.reset();

                     if (tupleCount != 0) {

                         bufferStartCount = tupleCount;

                     }

                     while (!buffer.isFull()) {

                         buffer.processTuple(input.readString(), input.readString(), input.readBoolean(), input.readBytes(), input.readBytes());

                         tupleCount++;

                     }

                 } catch(EOFException e) {}

             }

             public void run() throws IOException {

                 while (true) {

                     fill();

                     if (buffer.isAtEnd())

                         break;

                     buffer.copyUntil(null, processor);

                 }      

                 processor.close();

             }

             public void setProcessor(Step processor) throws IncompatibleProcessorException {  

                 if (processor instanceof ShreddedProcessor) {

                     this.processor = new DuplicateEliminator((ShreddedProcessor) processor);

                 } else if (processor instanceof DocumentSplit.Processor) {

                     this.processor = new DuplicateEliminator(new TupleUnshredder((DocumentSplit.Processor) processor));

                 } else if (processor instanceof org.galagosearch.tupleflow.Processor) {

                     this.processor = new DuplicateEliminator(new TupleUnshredder((org.galagosearch.tupleflow.Processor<DocumentSplit>) processor));

                 } else {

                     throw new IncompatibleProcessorException(processor.getClass().getName() + " is not supported by " + this.getClass().getName());                                                                       

                 }

             }                                

             public Class<DocumentSplit> getOutputClass() {

                 return DocumentSplit.class;

             }                

         }

         public static class DuplicateEliminator implements ShreddedProcessor {

             public ShreddedProcessor processor;

             DocumentSplit last = new DocumentSplit();

             public DuplicateEliminator() {}

             public DuplicateEliminator(ShreddedProcessor processor) {

                 this.processor = processor;

             }

             public void setShreddedProcessor(ShreddedProcessor processor) {

                 this.processor = processor;

             }

             public void processTuple(String fileName, String fileType, boolean isCompressed, byte[] startKey, byte[] endKey) throws IOException {

                 processor.processTuple(fileName, fileType, isCompressed, startKey, endKey);

             } 

             public void close() throws IOException {

                 processor.close();

             }                    

         }

         public static class TupleUnshredder implements ShreddedProcessor {

             DocumentSplit last = new DocumentSplit();

             public org.galagosearch.tupleflow.Processor<DocumentSplit> processor;                               

             public TupleUnshredder(DocumentSplit.Processor processor) {

                 this.processor = processor;

             }         

             public TupleUnshredder(org.galagosearch.tupleflow.Processor<DocumentSplit> processor) {

                 this.processor = processor;

             }

             public DocumentSplit clone(DocumentSplit object) {

                 DocumentSplit result = new DocumentSplit();

                 if (object == null) return result;

                 result.fileName = object.fileName; 

                 result.fileType = object.fileType; 

                 result.isCompressed = object.isCompressed; 

                 result.startKey = object.startKey; 

                 result.endKey = object.endKey; 

                 return result;

             }                 

             public void processTuple(String fileName, String fileType, boolean isCompressed, byte[] startKey, byte[] endKey) throws IOException {

                 last.fileName = fileName;

                 last.fileType = fileType;

                 last.isCompressed = isCompressed;

                 last.startKey = startKey;

                 last.endKey = endKey;

                 processor.process(clone(last));

             }               

             public void close() throws IOException {

                 processor.close();

             }

         }     

         public static class TupleShredder implements Processor {

             DocumentSplit last = new DocumentSplit();

             public ShreddedProcessor processor;

             public TupleShredder(ShreddedProcessor processor) {

                 this.processor = processor;

             }                              

             public DocumentSplit clone(DocumentSplit object) {

                 DocumentSplit result = new DocumentSplit();

                 if (object == null) return result;

                 result.fileName = object.fileName; 

                 result.fileType = object.fileType; 

                 result.isCompressed = object.isCompressed; 

                 result.startKey = object.startKey; 

                 result.endKey = object.endKey; 

                 return result;

             }                 

             public void process(DocumentSplit object) throws IOException {                                                                                                                                                   

                 boolean processAll = false;

                 processor.processTuple(object.fileName, object.fileType, object.isCompressed, object.startKey, object.endKey);                                         

             }

             public Class<DocumentSplit> getInputClass() {

                 return DocumentSplit.class;

             }

             public void close() throws IOException {

                 processor.close();

             }                     

         }

     } 

     public static class FileNameStartKeyOrder implements Order<DocumentSplit> {

         public int hash(DocumentSplit object) {

             int h = 0;

             h += Utility.hash(object.fileName);

             h += Utility.hash(object.startKey);

             return h;

         } 

         public Comparator<DocumentSplit> greaterThan() {

             return new Comparator<DocumentSplit>() {

                 public int compare(DocumentSplit one, DocumentSplit two) {

                     int result = 0;

                     do {

                         result = + Utility.compare(one.fileName, two.fileName);

                         if(result != 0) break;

                         result = + Utility.compare(one.startKey, two.startKey);

                         if(result != 0) break;

                     } while (false);

                     return -result;

                 }

             };

         }     

         public Comparator<DocumentSplit> lessThan() {

             return new Comparator<DocumentSplit>() {

                 public int compare(DocumentSplit one, DocumentSplit two) {

                     int result = 0;

                     do {

                         result = + Utility.compare(one.fileName, two.fileName);

                         if(result != 0) break;

                         result = + Utility.compare(one.startKey, two.startKey);

                         if(result != 0) break;

                     } while (false);

                     return result;

                 }

             };

         }     

         public TypeReader<DocumentSplit> orderedReader(ArrayInput _input) {

             return new ShreddedReader(_input);

         }    

         public TypeReader<DocumentSplit> orderedReader(ArrayInput _input, int bufferSize) {

             return new ShreddedReader(_input, bufferSize);

         }    

         public OrderedWriter<DocumentSplit> orderedWriter(ArrayOutput _output) {

             ShreddedWriter w = new ShreddedWriter(_output);

             return new OrderedWriterClass(w); 

         }                                    

         public static class OrderedWriterClass extends OrderedWriter< DocumentSplit > {

             DocumentSplit last = null;

             ShreddedWriter shreddedWriter = null; 

             public OrderedWriterClass(ShreddedWriter s) {

                 this.shreddedWriter = s;

             }

             public void process(DocumentSplit object) throws IOException {

                boolean processAll = false;

                if (processAll || last == null || 0 != Utility.compare(object.fileName, last.fileName)) { processAll = true; shreddedWriter.processFileName(object.fileName); }

                if (processAll || last == null || 0 != Utility.compare(object.startKey, last.startKey)) { processAll = true; shreddedWriter.processStartKey(object.startKey); }

                shreddedWriter.processTuple(object.fileType, object.isCompressed, object.endKey);

                last = object;

             }           

             public void close() throws IOException {

                 shreddedWriter.close();

             }

             public Class<DocumentSplit> getInputClass() {

                 return DocumentSplit.class;

             }

         } 

         public ReaderSource<DocumentSplit> orderedCombiner(Collection<TypeReader<DocumentSplit>> readers, boolean closeOnExit) {

             ArrayList<ShreddedReader> shreddedReaders = new ArrayList();

             for (TypeReader<DocumentSplit> reader : readers) {

                 shreddedReaders.add((ShreddedReader)reader);

             }

             return new ShreddedCombiner(shreddedReaders, closeOnExit);

         }                  

         public DocumentSplit clone(DocumentSplit object) {

             DocumentSplit result = new DocumentSplit();

             if (object == null) return result;

             result.fileName = object.fileName; 

             result.fileType = object.fileType; 

             result.isCompressed = object.isCompressed; 

             result.startKey = object.startKey; 

             result.endKey = object.endKey; 

             return result;

         }                 

         public Class<DocumentSplit> getOrderedClass() {

             return DocumentSplit.class;

         }                           

         public String[] getOrderSpec() {

             return new String[] {"+fileName", "+startKey"};

         }

         public static String getSpecString() {

             return "+fileName +startKey";

         }

         public interface ShreddedProcessor extends Step {

             public void processFileName(String fileName) throws IOException;

             public void processStartKey(byte[] startKey) throws IOException;

             public void processTuple(String fileType, boolean isCompressed, byte[] endKey) throws IOException;

             public void close() throws IOException;

         }    

         public interface ShreddedSource extends Step {

         }                                              

         public static class ShreddedWriter implements ShreddedProcessor {

             ArrayOutput output;

             ShreddedBuffer buffer = new ShreddedBuffer();

             String lastFileName;

             byte[] lastStartKey;

             boolean lastFlush = false;

             public ShreddedWriter(ArrayOutput output) {

                 this.output = output;

             }                        

             public void close() throws IOException {

                 flush();

             }

             public void processFileName(String fileName) {

                 lastFileName = fileName;

                 buffer.processFileName(fileName);

             }

             public void processStartKey(byte[] startKey) {

                 lastStartKey = startKey;

                 buffer.processStartKey(startKey);

             }

             public final void processTuple(String fileType, boolean isCompressed, byte[] endKey) throws IOException {

                 if (lastFlush) {

                     if(buffer.fileNames.size() == 0) buffer.processFileName(lastFileName);

                     if(buffer.startKeys.size() == 0) buffer.processStartKey(lastStartKey);

                     lastFlush = false;

                 }

                 buffer.processTuple(fileType, isCompressed, endKey);

                 if (buffer.isFull())

                     flush();

             }

             public final void flushTuples(int pauseIndex) throws IOException {

                 while (buffer.getReadIndex() < pauseIndex) {

                     output.writeString(buffer.getFileType());

                     output.writeBoolean(buffer.getIsCompressed());

                     output.writeBytes(buffer.getEndKey());

                     buffer.incrementTuple();

                 }

             }  

             public final void flushFileName(int pauseIndex) throws IOException {

                 while (buffer.getReadIndex() < pauseIndex) {

                     int nextPause = buffer.getFileNameEndIndex();

                     int count = nextPause - buffer.getReadIndex();

                     output.writeString(buffer.getFileName());

                     output.writeInt(count);

                     buffer.incrementFileName();

                     flushStartKey(nextPause);

                     assert nextPause == buffer.getReadIndex();

                 }

             }

             public final void flushStartKey(int pauseIndex) throws IOException {

                 while (buffer.getReadIndex() < pauseIndex) {

                     int nextPause = buffer.getStartKeyEndIndex();

                     int count = nextPause - buffer.getReadIndex();

                     output.writeBytes(buffer.getStartKey());

                     output.writeInt(count);

                     buffer.incrementStartKey();

                     flushTuples(nextPause);

                     assert nextPause == buffer.getReadIndex();

                 }

             }

             public void flush() throws IOException { 

                 flushFileName(buffer.getWriteIndex());

                 buffer.reset(); 

                 lastFlush = true;

             }                           

         }

         public static class ShreddedBuffer {

             ArrayList<String> fileNames = new ArrayList();

             ArrayList<byte[]> startKeys = new ArrayList();

             ArrayList<Integer> fileNameTupleIdx = new ArrayList();

             ArrayList<Integer> startKeyTupleIdx = new ArrayList();

             int fileNameReadIdx = 0;

             int startKeyReadIdx = 0;

             String[] fileTypes;

             boolean[] isCompresseds;

             byte[][] endKeys;

             int writeTupleIndex = 0;

             int readTupleIndex = 0;

             int batchSize;

             public ShreddedBuffer(int batchSize) {

                 this.batchSize = batchSize;

                 fileTypes = new String[batchSize];

                 isCompresseds = new boolean[batchSize];

                 endKeys = new byte[batchSize][];

             }                              

             public ShreddedBuffer() {    

                 this(10000);

             }                                                                                                                    

             public void processFileName(String fileName) {

                 fileNames.add(fileName);

                 fileNameTupleIdx.add(writeTupleIndex);

             }                                      

             public void processStartKey(byte[] startKey) {

                 startKeys.add(startKey);

                 startKeyTupleIdx.add(writeTupleIndex);

             }                                      

             public void processTuple(String fileType, boolean isCompressed, byte[] endKey) {

                 assert fileNames.size() > 0;

                 assert startKeys.size() > 0;

                 fileTypes[writeTupleIndex] = fileType;

                 isCompresseds[writeTupleIndex] = isCompressed;

                 endKeys[writeTupleIndex] = endKey;

                 writeTupleIndex++;

             }

             public void resetData() {

                 fileNames.clear();

                 startKeys.clear();

                 fileNameTupleIdx.clear();

                 startKeyTupleIdx.clear();

                 writeTupleIndex = 0;

             }                  

             public void resetRead() {

                 readTupleIndex = 0;

                 fileNameReadIdx = 0;

                 startKeyReadIdx = 0;

             } 

             public void reset() {

                 resetData();

                 resetRead();

             } 

             public boolean isFull() {

                 return writeTupleIndex >= batchSize;

             }

             public boolean isEmpty() {

                 return writeTupleIndex == 0;

             }                          

             public boolean isAtEnd() {

                 return readTupleIndex >= writeTupleIndex;

             }           

             public void incrementFileName() {

                 fileNameReadIdx++;  

             }                                                                                              

             public void autoIncrementFileName() {

                 while (readTupleIndex >= getFileNameEndIndex() && readTupleIndex < writeTupleIndex)

                     fileNameReadIdx++;

             }                 

             public void incrementStartKey() {

                 startKeyReadIdx++;  

             }                                                                                              

             public void autoIncrementStartKey() {

                 while (readTupleIndex >= getStartKeyEndIndex() && readTupleIndex < writeTupleIndex)

                     startKeyReadIdx++;

             }                 

             public void incrementTuple() {

                 readTupleIndex++;

             }                    

             public int getFileNameEndIndex() {

                 if ((fileNameReadIdx+1) >= fileNameTupleIdx.size())

                     return writeTupleIndex;

                 return fileNameTupleIdx.get(fileNameReadIdx+1);

             }

             public int getStartKeyEndIndex() {

                 if ((startKeyReadIdx+1) >= startKeyTupleIdx.size())

                     return writeTupleIndex;

                 return startKeyTupleIdx.get(startKeyReadIdx+1);

             }

             public int getReadIndex() {

                 return readTupleIndex;

             }   

             public int getWriteIndex() {

                 return writeTupleIndex;

             } 

             public String getFileName() {

                 assert readTupleIndex < writeTupleIndex;

                 assert fileNameReadIdx < fileNames.size();

                 return fileNames.get(fileNameReadIdx);

             }

             public byte[] getStartKey() {

                 assert readTupleIndex < writeTupleIndex;

                 assert startKeyReadIdx < startKeys.size();

                 return startKeys.get(startKeyReadIdx);

             }

             public String getFileType() {

                 assert readTupleIndex < writeTupleIndex;

                 return fileTypes[readTupleIndex];

             }                                         

             public boolean getIsCompressed() {

                 assert readTupleIndex < writeTupleIndex;

                 return isCompresseds[readTupleIndex];

             }                                         

             public byte[] getEndKey() {

                 assert readTupleIndex < writeTupleIndex;

                 return endKeys[readTupleIndex];

             }                                         

             public void copyTuples(int endIndex, ShreddedProcessor output) throws IOException {

                 while (getReadIndex() < endIndex) {

                    output.processTuple(getFileType(), getIsCompressed(), getEndKey());

                    incrementTuple();

                 }

             }                                                                           

             public void copyUntilIndexFileName(int endIndex, ShreddedProcessor output) throws IOException {

                 while (getReadIndex() < endIndex) {

                     output.processFileName(getFileName());

                     assert getFileNameEndIndex() <= endIndex;

                     copyUntilIndexStartKey(getFileNameEndIndex(), output);

                     incrementFileName();

                 }

             } 

             public void copyUntilIndexStartKey(int endIndex, ShreddedProcessor output) throws IOException {

                 while (getReadIndex() < endIndex) {

                     output.processStartKey(getStartKey());

                     assert getStartKeyEndIndex() <= endIndex;

                     copyTuples(getStartKeyEndIndex(), output);

                     incrementStartKey();

                 }

             }  

             public void copyUntilFileName(ShreddedBuffer other, ShreddedProcessor output) throws IOException {

                 while (!isAtEnd()) {

                     if (other != null) {   

                         assert !other.isAtEnd();

                         int c = + Utility.compare(getFileName(), other.getFileName());

                         if (c > 0) {

                             break;   

                         }

                         output.processFileName(getFileName());

                         if (c < 0) {

                             copyUntilIndexStartKey(getFileNameEndIndex(), output);

                         } else if (c == 0) {

                             copyUntilStartKey(other, output);

                             autoIncrementFileName();

                             break;

                         }

                     } else {

                         output.processFileName(getFileName());

                         copyUntilIndexStartKey(getFileNameEndIndex(), output);

                     }

                     incrementFileName();  

                 }

             }

             public void copyUntilStartKey(ShreddedBuffer other, ShreddedProcessor output) throws IOException {

                 while (!isAtEnd()) {

                     if (other != null) {   

                         assert !other.isAtEnd();

                         int c = + Utility.compare(getStartKey(), other.getStartKey());

                         if (c > 0) {

                             break;   

                         }

                         output.processStartKey(getStartKey());

                         copyTuples(getStartKeyEndIndex(), output);

                     } else {

                         output.processStartKey(getStartKey());

                         copyTuples(getStartKeyEndIndex(), output);

                     }

                     incrementStartKey();  

                     if (getFileNameEndIndex() <= readTupleIndex)

                         break;   

                 }

             }

             public void copyUntil(ShreddedBuffer other, ShreddedProcessor output) throws IOException {

                 copyUntilFileName(other, output);

             }

         }                         

         public static class ShreddedCombiner implements ReaderSource<DocumentSplit>, ShreddedSource {   

             public ShreddedProcessor processor;

             Collection<ShreddedReader> readers;       

             boolean closeOnExit = false;

             boolean uninitialized = true;

             PriorityQueue<ShreddedReader> queue = new PriorityQueue<ShreddedReader>();

             public ShreddedCombiner(Collection<ShreddedReader> readers, boolean closeOnExit) {

                 this.readers = readers;                                                       

                 this.closeOnExit = closeOnExit;

             }

             public void setProcessor(Step processor) throws IncompatibleProcessorException {  

                 if (processor instanceof ShreddedProcessor) {

                     this.processor = new DuplicateEliminator((ShreddedProcessor) processor);

                 } else if (processor instanceof DocumentSplit.Processor) {

                     this.processor = new DuplicateEliminator(new TupleUnshredder((DocumentSplit.Processor) processor));

                 } else if (processor instanceof org.galagosearch.tupleflow.Processor) {

                     this.processor = new DuplicateEliminator(new TupleUnshredder((org.galagosearch.tupleflow.Processor<DocumentSplit>) processor));

                 } else {

                     throw new IncompatibleProcessorException(processor.getClass().getName() + " is not supported by " + this.getClass().getName());                                                                       

                 }

             }                                

             public Class<DocumentSplit> getOutputClass() {

                 return DocumentSplit.class;

             }

             public void initialize() throws IOException {

                 for (ShreddedReader reader : readers) {

                     reader.fill();                                        

                     if (!reader.getBuffer().isAtEnd())

                         queue.add(reader);

                 }   

                 uninitialized = false;

             }

             public void run() throws IOException {

                 initialize();

                 while (queue.size() > 0) {

                     ShreddedReader top = queue.poll();

                     ShreddedReader next = null;

                     ShreddedBuffer nextBuffer = null; 

                     assert !top.getBuffer().isAtEnd();

                     if (queue.size() > 0) {

                         next = queue.peek();

                         nextBuffer = next.getBuffer();

                         assert !nextBuffer.isAtEnd();

                     }

                     top.getBuffer().copyUntil(nextBuffer, processor);

                     if (top.getBuffer().isAtEnd())

                         top.fill();                 

                     if (!top.getBuffer().isAtEnd())

                         queue.add(top);

                 }              

                 if (closeOnExit)

                     processor.close();

             }

             public DocumentSplit read() throws IOException {

                 if (uninitialized)

                     initialize();

                 DocumentSplit result = null;

                 while (queue.size() > 0) {

                     ShreddedReader top = queue.poll();

                     result = top.read();

                     if (result != null) {

                         if (top.getBuffer().isAtEnd())

                             top.fill();

                         queue.offer(top);

                         break;

                     } 

                 }

                 return result;

             }

         } 

         public static class ShreddedReader implements Step, Comparable<ShreddedReader>, TypeReader<DocumentSplit>, ShreddedSource {      

             public ShreddedProcessor processor;

             ShreddedBuffer buffer;

             DocumentSplit last = new DocumentSplit();         

             long updateFileNameCount = -1;

             long updateStartKeyCount = -1;

             long tupleCount = 0;

             long bufferStartCount = 0;  

             ArrayInput input;

             public ShreddedReader(ArrayInput input) {

                 this.input = input; 

                 this.buffer = new ShreddedBuffer();

             }                               

             public ShreddedReader(ArrayInput input, int bufferSize) { 

                 this.input = input;

                 this.buffer = new ShreddedBuffer(bufferSize);

             }

             public final int compareTo(ShreddedReader other) {

                 ShreddedBuffer otherBuffer = other.getBuffer();

                 if (buffer.isAtEnd() && otherBuffer.isAtEnd()) {

                     return 0;                 

                 } else if (buffer.isAtEnd()) {

                     return -1;

                 } else if (otherBuffer.isAtEnd()) {

                     return 1;

                 }

                 int result = 0;

                 do {