// This file was automatically generated with the command: 

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

 package org.galagosearch.tupleflow.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 FileName implements Type<FileName> {

     public String filename; 

     public FileName() {}

     public FileName(String filename) {

         this.filename = filename;

     }  

     public String toString() {

             return String.format("%s",

                                    filename);

     } 

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

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

             return new Unordered();

         }

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

             return new FilenameOrder();

         }

         return null;

     } 

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

         public void process(FileName object) throws IOException;

         public void close() throws IOException;

     }                        

     public interface Source extends Step {

     }

     public static class Unordered implements Order<FileName> {

         public int hash(FileName object) {

             int h = 0;

             return h;

         } 

         public Comparator<FileName> greaterThan() {

             return new Comparator<FileName>() {

                 public int compare(FileName one, FileName two) {

                     int result = 0;

                     do {

                     } while (false);

                     return -result;

                 }

             };

         }     

         public Comparator<FileName> lessThan() {

             return new Comparator<FileName>() {

                 public int compare(FileName one, FileName two) {

                     int result = 0;

                     do {

                     } while (false);

                     return result;

                 }

             };

         }     

         public TypeReader<FileName> orderedReader(ArrayInput _input) {

             return new ShreddedReader(_input);

         }    

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

             return new ShreddedReader(_input, bufferSize);

         }    

         public OrderedWriter<FileName> orderedWriter(ArrayOutput _output) {

             ShreddedWriter w = new ShreddedWriter(_output);

             return new OrderedWriterClass(w); 

         }                                    

         public static class OrderedWriterClass extends OrderedWriter< FileName > {

             FileName last = null;

             ShreddedWriter shreddedWriter = null; 

             public OrderedWriterClass(ShreddedWriter s) {

                 this.shreddedWriter = s;

             }

             public void process(FileName object) throws IOException {

                boolean processAll = false;

                shreddedWriter.processTuple(object.filename);

                last = object;

             }           

             public void close() throws IOException {

                 shreddedWriter.close();

             }

             public Class<FileName> getInputClass() {

                 return FileName.class;

             }

         } 

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

             ArrayList<ShreddedReader> shreddedReaders = new ArrayList();

             for (TypeReader<FileName> reader : readers) {

                 shreddedReaders.add((ShreddedReader)reader);

             }

             return new ShreddedCombiner(shreddedReaders, closeOnExit);

         }                  

         public FileName clone(FileName object) {

             FileName result = new FileName();

             if (object == null) return result;

             result.filename = object.filename; 

             return result;

         }                 

         public Class<FileName> getOrderedClass() {

             return FileName.class;

         }                           

         public String[] getOrderSpec() {

             return new String[] {};

         }

         public static String getSpecString() {

             return "";

         }

         public interface ShreddedProcessor extends Step {

             public void processTuple(String filename) 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) throws IOException {

                 if (lastFlush) {

                     lastFlush = false;

                 }

                 buffer.processTuple(filename);

                 if (buffer.isFull())

                     flush();

             }

             public final void flushTuples(int pauseIndex) throws IOException {

                 while (buffer.getReadIndex() < pauseIndex) {

                     output.writeString(buffer.getFilename());

                     buffer.incrementTuple();

                 }

             }  

             public void flush() throws IOException { 

                 flushTuples(buffer.getWriteIndex());

                 buffer.reset(); 

                 lastFlush = true;

             }                           

         }

         public static class ShreddedBuffer {

             String[] filenames;

             int writeTupleIndex = 0;

             int readTupleIndex = 0;

             int batchSize;

             public ShreddedBuffer(int batchSize) {

                 this.batchSize = batchSize;

                 filenames = new String[batchSize];

             }                              

             public ShreddedBuffer() {    

                 this(10000);

             }                                                                                                                    

             public void processTuple(String filename) {

                 filenames[writeTupleIndex] = filename;

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

                 while (getReadIndex() < endIndex) {

                    output.processTuple(getFilename());

                    incrementTuple();

                 }

             }                                                                           

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

             }

         }                         

         public static class ShreddedCombiner implements ReaderSource<FileName>, 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 FileName.Processor) {

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

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

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

                 } else {

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

                 }

             }                                

             public Class<FileName> getOutputClass() {

                 return FileName.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 FileName read() throws IOException {

                 if (uninitialized)

                     initialize();

                 FileName 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<FileName>, ShreddedSource {      

             public ShreddedProcessor processor;

             ShreddedBuffer buffer;

             FileName last = new FileName();         

             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 FileName read() throws IOException {

                 if (buffer.isAtEnd()) {

                     fill();             

                     if (buffer.isAtEnd()) {

                         return null;

                     }

                 }

                 assert !buffer.isAtEnd();

                 FileName result = new FileName();

                 result.filename = buffer.getFilename();

                 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());

                         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 FileName.Processor) {

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

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

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

                 } else {

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

                 }

             }                                

             public Class<FileName> getOutputClass() {

                 return FileName.class;

             }                

         }

         public static class DuplicateEliminator implements ShreddedProcessor {

             public ShreddedProcessor processor;

             FileName last = new FileName();

             public DuplicateEliminator() {}

             public DuplicateEliminator(ShreddedProcessor processor) {

                 this.processor = processor;

             }

             public void setShreddedProcessor(ShreddedProcessor processor) {

                 this.processor = processor;

             }

             public void processTuple(String filename) throws IOException {

                 processor.processTuple(filename);

             } 

             public void close() throws IOException {

                 processor.close();

             }                    

         }

         public static class TupleUnshredder implements ShreddedProcessor {

             FileName last = new FileName();

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

             public TupleUnshredder(FileName.Processor processor) {

                 this.processor = processor;

             }         

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

                 this.processor = processor;

             }

             public FileName clone(FileName object) {

                 FileName result = new FileName();

                 if (object == null) return result;

                 result.filename = object.filename; 

                 return result;

             }                 

             public void processTuple(String filename) throws IOException {

                 last.filename = filename;

                 processor.process(clone(last));

             }               

             public void close() throws IOException {

                 processor.close();

             }

         }     

         public static class TupleShredder implements Processor {

             FileName last = new FileName();

             public ShreddedProcessor processor;

             public TupleShredder(ShreddedProcessor processor) {

                 this.processor = processor;

             }                              

             public FileName clone(FileName object) {

                 FileName result = new FileName();

                 if (object == null) return result;

                 result.filename = object.filename; 

                 return result;

             }                 

             public void process(FileName object) throws IOException {                                                                                                                                                   

                 boolean processAll = false;

                 processor.processTuple(object.filename);                                         

             }

             public Class<FileName> getInputClass() {

                 return FileName.class;

             }

             public void close() throws IOException {

                 processor.close();

             }                     

         }

     } 

     public static class FilenameOrder implements Order<FileName> {

         public int hash(FileName object) {

             int h = 0;

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

             return h;

         } 

         public Comparator<FileName> greaterThan() {

             return new Comparator<FileName>() {

                 public int compare(FileName one, FileName two) {

                     int result = 0;

                     do {

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

                         if(result != 0) break;

                     } while (false);

                     return -result;

                 }

             };

         }     

         public Comparator<FileName> lessThan() {

             return new Comparator<FileName>() {

                 public int compare(FileName one, FileName two) {

                     int result = 0;

                     do {

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

                         if(result != 0) break;

                     } while (false);

                     return result;

                 }

             };

         }     

         public TypeReader<FileName> orderedReader(ArrayInput _input) {

             return new ShreddedReader(_input);

         }    

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

             return new ShreddedReader(_input, bufferSize);

         }    

         public OrderedWriter<FileName> orderedWriter(ArrayOutput _output) {

             ShreddedWriter w = new ShreddedWriter(_output);

             return new OrderedWriterClass(w); 

         }                                    

         public static class OrderedWriterClass extends OrderedWriter< FileName > {

             FileName last = null;

             ShreddedWriter shreddedWriter = null; 

             public OrderedWriterClass(ShreddedWriter s) {

                 this.shreddedWriter = s;

             }

             public void process(FileName object) throws IOException {

                boolean processAll = false;

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

                shreddedWriter.processTuple();

                last = object;

             }           

             public void close() throws IOException {

                 shreddedWriter.close();

             }

             public Class<FileName> getInputClass() {

                 return FileName.class;

             }

         } 

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

             ArrayList<ShreddedReader> shreddedReaders = new ArrayList();

             for (TypeReader<FileName> reader : readers) {

                 shreddedReaders.add((ShreddedReader)reader);

             }

             return new ShreddedCombiner(shreddedReaders, closeOnExit);

         }                  

         public FileName clone(FileName object) {

             FileName result = new FileName();

             if (object == null) return result;

             result.filename = object.filename; 

             return result;

         }                 

         public Class<FileName> getOrderedClass() {

             return FileName.class;

         }                           

         public String[] getOrderSpec() {

             return new String[] {"+filename"};

         }

         public static String getSpecString() {

             return "+filename";

         }

         public interface ShreddedProcessor extends Step {

             public void processFilename(String filename) throws IOException;

             public void processTuple() 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;

             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 final void processTuple() throws IOException {

                 if (lastFlush) {

                     if(buffer.filenames.size() == 0) buffer.processFilename(lastFilename);

                     lastFlush = false;

                 }

                 buffer.processTuple();

                 if (buffer.isFull())

                     flush();

             }

             public final void flushTuples(int pauseIndex) throws IOException {

                 while (buffer.getReadIndex() < pauseIndex) {

                     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();

                     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<Integer> filenameTupleIdx = new ArrayList();

             int filenameReadIdx = 0;

             int writeTupleIndex = 0;

             int readTupleIndex = 0;

             int batchSize;

             public ShreddedBuffer(int batchSize) {

                 this.batchSize = batchSize;

             }                              

             public ShreddedBuffer() {    

                 this(10000);

             }                                                                                                                    

             public void processFilename(String filename) {

                 filenames.add(filename);

                 filenameTupleIdx.add(writeTupleIndex);

             }                                      

             public void processTuple() {

                 assert filenames.size() > 0;

                 writeTupleIndex++;

             }

             public void resetData() {

                 filenames.clear();

                 filenameTupleIdx.clear();

                 writeTupleIndex = 0;

             }                  

             public void resetRead() {

                 readTupleIndex = 0;

                 filenameReadIdx = 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 incrementTuple() {

                 readTupleIndex++;

             }                    

             public int getFilenameEndIndex() {

                 if ((filenameReadIdx+1) >= filenameTupleIdx.size())

                     return writeTupleIndex;

                 return filenameTupleIdx.get(filenameReadIdx+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 void copyTuples(int endIndex, ShreddedProcessor output) throws IOException {

                 while (getReadIndex() < endIndex) {

                    output.processTuple();

                    incrementTuple();

                 }

             }                                                                           

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

                 while (getReadIndex() < endIndex) {

                     output.processFilename(getFilename());

                     assert getFilenameEndIndex() <= endIndex;

                     copyTuples(getFilenameEndIndex(), output);

                     incrementFilename();

                 }

             }  

             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());

                         copyTuples(getFilenameEndIndex(), output);

                     } else {

                         output.processFilename(getFilename());

                         copyTuples(getFilenameEndIndex(), output);

                     }

                     incrementFilename();  

                 }

             }

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

                 copyUntilFilename(other, output);

             }

         }                         

         public static class ShreddedCombiner implements ReaderSource<FileName>, 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 FileName.Processor) {

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

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

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

                 } else {

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

                 }

             }                                

             public Class<FileName> getOutputClass() {

                 return FileName.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 FileName read() throws IOException {

                 if (uninitialized)

                     initialize();

                 FileName 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<FileName>, ShreddedSource {      

             public ShreddedProcessor processor;

             ShreddedBuffer buffer;

             FileName last = new FileName();         

             long updateFilenameCount = -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 {

                     result = + Utility.compare(buffer.getFilename(), otherBuffer.getFilename());

                     if(result != 0) break;

                 } while (false);                                             

                 return result;

             }

             public final ShreddedBuffer getBuffer() {

                 return buffer;

             }                

             public final FileName read() throws IOException {

                 if (buffer.isAtEnd()) {

                     fill();             

                     if (buffer.isAtEnd()) {

                         return null;

                     }

                 }

                 assert !buffer.isAtEnd();

                 FileName result = new FileName();

                 result.filename = buffer.getFilename();

                 buffer.incrementTuple();

                 buffer.autoIncrementFilename();

                 return result;

             }           

             public final void fill() throws IOException {

                 try {   

                     buffer.reset();

                     if (tupleCount != 0) {

                         if(updateFilenameCount - tupleCount > 0) {

                             buffer.filenames.add(last.filename);

                             buffer.filenameTupleIdx.add((int) (updateFilenameCount - tupleCount));

                         }

                         bufferStartCount = tupleCount;

                     }

                     while (!buffer.isFull()) {

                         updateFilename();

                         buffer.processTuple();

                         tupleCount++;

                     }

                 } catch(EOFException e) {}

             }

             public final void updateFilename() throws IOException {

                 if (updateFilenameCount > tupleCount)

                     return;

                 last.filename = input.readString();

                 updateFilenameCount = tupleCount + input.readInt();

                 buffer.processFilename(last.filename);

             }

             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 FileName.Processor) {

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

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

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

                 } else {

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

                 }

             }                                

             public Class<FileName> getOutputClass() {

                 return FileName.class;

             }                

         }

         public static class DuplicateEliminator implements ShreddedProcessor {

             public ShreddedProcessor processor;

             FileName last = new FileName();

             boolean filenameProcess = true;

             public DuplicateEliminator() {}

             public DuplicateEliminator(ShreddedProcessor processor) {

                 this.processor = processor;

             }

             public void setShreddedProcessor(ShreddedProcessor processor) {

                 this.processor = processor;

             }

             public void processFilename(String filename) throws IOException {  

                 if (filenameProcess || Utility.compare(filename, last.filename) != 0) {

                     last.filename = filename;

                     processor.processFilename(filename);

                     filenameProcess = false;

                 }

             }  

             public void resetFilename() {

                  filenameProcess = true;

             }                                                

             public void processTuple() throws IOException {

                 processor.processTuple();

             } 

             public void close() throws IOException {

                 processor.close();

             }                    

         }

         public static class TupleUnshredder implements ShreddedProcessor {

             FileName last = new FileName();

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

             public TupleUnshredder(FileName.Processor processor) {

                 this.processor = processor;

             }         

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

                 this.processor = processor;

             }

             public FileName clone(FileName object) {

                 FileName result = new FileName();

                 if (object == null) return result;

                 result.filename = object.filename; 

                 return result;

             }                 

             public void processFilename(String filename) throws IOException {

                 last.filename = filename;

             }   

             public void processTuple() throws IOException {

                 processor.process(clone(last));

             }               

             public void close() throws IOException {

                 processor.close();

             }

         }     

         public static class TupleShredder implements Processor {

             FileName last = new FileName();

             public ShreddedProcessor processor;

             public TupleShredder(ShreddedProcessor processor) {

                 this.processor = processor;

             }                              

             public FileName clone(FileName object) {

                 FileName result = new FileName();

                 if (object == null) return result;

                 result.filename = object.filename; 

                 return result;

             }                 

             public void process(FileName object) throws IOException {                                                                                                                                                   

                 boolean processAll = false;

                 if(last == null || Utility.compare(last.filename, object.filename) != 0 || processAll) { processor.processFilename(object.filename); processAll = true; }

                 processor.processTuple();                                         

             }

             public Class<FileName> getInputClass() {

                 return FileName.class;

             }

             public void close() throws IOException {

                 processor.close();

             }                     

         }

     } 

 }