TrecTerrier (Terrier Information Retrieval Platform 4.1 API)

java.lang.Object
- org.terrier.applications.TrecTerrier

```
public class TrecTerrier
extends Object
```
The text-based application that handles querying with Terrier, for TREC-like test collections. TrecTerrier, indexing TREC collections with Terrier. usage: java TrecTerrier [flags in any order] -h --help print this message -V --version print version information -i --index index a collection -id --inverted2direct generate a direct index for an existing index -r --retrieve retrieve from an indexed collection -e --evaluate evaluates the results in the directory var/results with the specified qrels file in the file etc/trec.qrels If invoked with '-i', then both the direct and inverted files are build, unless it is specified which of the structures to build. -d --direct creates the direct file -v --inverted creates the inverted file, from an already existing direct If invoked with '-r', there are the following options. -c value parameter value for term frequency normalisation. If it is not specified, then the default value for each weighting model is used, eg PL2 => c=1, BM25 b=> 0.75 -q --queryexpand applies query expansion --docids will only print docids in the .res file If invoked with '-e', there is the following option. -p --perquery reports the average precision for each query separately. filename.res restrict evaluation to filename.res only. If invoked with one of the following options, then the contents of the corresponding data structure are shown in the standard output. --printdocid prints the contents of the document index --printlexicon prints the contents of the lexicon --printinverted prints the contents of the inverted file --printdirect prints the contents of the direct file --printstats prints statistics about the indexed collection

Author:

Vassilis Plachouras

Field Summary

Fields
Modifier and Type	Field and Description
`protected static int`	`ARGUMENTS_OK`
`protected double`	`c` The value of the term frequency normalisation parameter.
`protected boolean`	`direct` Specifies whether to build the direct file only.
`protected boolean`	`docids`
`protected static int`	`ERROR_CONFLICTING_ARGUMENTS`
`protected static int`	`ERROR_DIRECT_FILE_EXISTS`
`protected static int`	`ERROR_DIRECT_FILE_NOT_EXISTS`
`protected static int`	`ERROR_DIRECT_NOT_INDEXING`
`protected static int`	`ERROR_EXPAND_NOT_RETRIEVE`
`protected static int`	`ERROR_GIVEN_C_NOT_RETRIEVING`
`protected static int`	`ERROR_HADOOP_NOT_RETRIEVAL`
`protected static int`	`ERROR_HADOOP_ONLY_INDEX`
`protected static int`	`ERROR_INVERTED_NOT_INDEXING`
`protected static int`	`ERROR_LANGUAGEMODEL_NOT_RETRIEVE`
`protected static int`	`ERROR_NO_ARGUMENTS`
`protected static int`	`ERROR_NO_C_VALUE`
`protected static int`	`ERROR_PRINT_DIRECT_FILE_NOT_EXISTS`
`protected static int`	`ERROR_PRINT_DOCINDEX_FILE_NOT_EXISTS`
`protected static int`	`ERROR_PRINT_INVERTED_FILE_NOT_EXISTS`
`protected static int`	`ERROR_PRINT_LEXICON_FILE_NOT_EXISTS`
`protected static int`	`ERROR_PRINT_STATS_FILE_NOT_EXISTS`
`protected static int`	`ERROR_UNKNOWN_OPTION`
`protected boolean`	`evaluation` Specifies whether to perform trec_eval like evaluation.
`protected boolean`	`evaluation_per_query` Specifies whether to perform trec_eval like evaluation, reporting only average precision for each query.
`protected String`	`evaluation_type` Specifies if the evaluation is done for adhoc or named-page finding retrieval task.
`protected String`	`evaluationFilename` The file to evaluation, if any
`protected boolean`	`hadoop` use Hadoop indexing
`protected boolean`	`indexing` Specifies whether to index a collection
`protected boolean`	`inverted` Specifies whether to build the inverted file from an already created direct file.
`protected boolean`	`inverted2direct`
`protected boolean`	`isParameterValueSpecified` Indicates whether there is a specified value for the term frequency normalisation parameter.
`protected boolean`	`printdirect` Specifies whether to print the direct file
`protected boolean`	`printdocid` Specifies whether to print the document index
`protected boolean`	`printHelp` Specifies whether a help message is printed
`protected boolean`	`printinverted` Specifies whether to print the inverted file
`protected boolean`	`printlexicon` Specifies whether to print the lexicon
`protected boolean`	`printmeta` whether to print the meta index
`protected boolean`	`printstats` Specifies whether to print the statistics file
`protected boolean`	`printVersion` Specified whether a version message is printed
`protected boolean`	`queryexpand` Specifies whether to apply query expansion
`protected boolean`	`retrieving` Specifies whether to retrieve from an indexed collection
`protected boolean`	`singlePass` Specifies whether to build the inverted file from scrach, sigle pass method
`protected String`	`unknownOption` The unkown option

Constructor Summary

Constructors
Constructor and Description

TrecTerrier()

Constructors
Constructor and Description
`TrecTerrier()`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`applyOptions(int status)` Apply the option resulted from processing the command line arguments
`static void`	`main(String[] args)` The main method that starts the application
`protected int`	`processOptions(String[] args)` Processes the command line arguments and sets the corresponding properties accordingly.
`void`	`run()` Calls the required classes from Terrier.
`protected void`	`usage()` Prints a help message that explains the possible options.
`protected void`	`version()` Prints the version information about Terrier

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - unknownOption
```
protected String unknownOption
```
    The unkown option
  - evaluationFilename
```
protected String evaluationFilename
```
    The file to evaluation, if any
  - queryexpand
```
protected boolean queryexpand
```
    Specifies whether to apply query expansion
  - printHelp
```
protected boolean printHelp
```
    Specifies whether a help message is printed
  - printVersion
```
protected boolean printVersion
```
    Specified whether a version message is printed
  - indexing
```
protected boolean indexing
```
    Specifies whether to index a collection
  - singlePass
```
protected boolean singlePass
```
    Specifies whether to build the inverted file from scrach, sigle pass method
  - hadoop
```
protected boolean hadoop
```
    use Hadoop indexing
  - retrieving
```
protected boolean retrieving
```
    Specifies whether to retrieve from an indexed collection
  - printdocid
```
protected boolean printdocid
```
    Specifies whether to print the document index
  - printlexicon
```
protected boolean printlexicon
```
    Specifies whether to print the lexicon
  - printinverted
```
protected boolean printinverted
```
    Specifies whether to print the inverted file
  - printdirect
```
protected boolean printdirect
```
    Specifies whether to print the direct file
  - printstats
```
protected boolean printstats
```
    Specifies whether to print the statistics file
  - printmeta
```
protected boolean printmeta
```
    whether to print the meta index
  - evaluation_per_query
```
protected boolean evaluation_per_query
```
    Specifies whether to perform trec_eval like evaluation, reporting only average precision for each query.
  - evaluation_type
```
protected String evaluation_type
```
    Specifies if the evaluation is done for adhoc or named-page finding retrieval task. adhoc by default.
  - inverted
```
protected boolean inverted
```
    Specifies whether to build the inverted file from an already created direct file.
  - direct
```
protected boolean direct
```
    Specifies whether to build the direct file only.
  - c
```
protected double c
```
    The value of the term frequency normalisation parameter.
  - evaluation
```
protected boolean evaluation
```
    Specifies whether to perform trec_eval like evaluation.
  - isParameterValueSpecified
```
protected boolean isParameterValueSpecified
```
    Indicates whether there is a specified value for the term frequency normalisation parameter.
  - inverted2direct
```
protected boolean inverted2direct
```
  - docids
```
protected boolean docids
```
  - ARGUMENTS_OK
```
protected static final int ARGUMENTS_OK
```
    See Also:
    Constant Field Values
  - ERROR_NO_ARGUMENTS
```
protected static final int ERROR_NO_ARGUMENTS
```
    See Also:
    Constant Field Values
  - ERROR_NO_C_VALUE
```
protected static final int ERROR_NO_C_VALUE
```
    See Also:
    Constant Field Values
  - ERROR_CONFLICTING_ARGUMENTS
```
protected static final int ERROR_CONFLICTING_ARGUMENTS
```
    See Also:
    Constant Field Values
  - ERROR_DIRECT_FILE_EXISTS
```
protected static final int ERROR_DIRECT_FILE_EXISTS
```
    See Also:
    Constant Field Values
  - ERROR_DIRECT_FILE_NOT_EXISTS
```
protected static final int ERROR_DIRECT_FILE_NOT_EXISTS
```
    See Also:
    Constant Field Values
  - ERROR_PRINT_DOCINDEX_FILE_NOT_EXISTS
```
protected static final int ERROR_PRINT_DOCINDEX_FILE_NOT_EXISTS
```
    See Also:
    Constant Field Values
  - ERROR_PRINT_LEXICON_FILE_NOT_EXISTS
```
protected static final int ERROR_PRINT_LEXICON_FILE_NOT_EXISTS
```
    See Also:
    Constant Field Values
  - ERROR_PRINT_INVERTED_FILE_NOT_EXISTS
```
protected static final int ERROR_PRINT_INVERTED_FILE_NOT_EXISTS
```
    See Also:
    Constant Field Values
  - ERROR_PRINT_STATS_FILE_NOT_EXISTS
```
protected static final int ERROR_PRINT_STATS_FILE_NOT_EXISTS
```
    See Also:
    Constant Field Values
  - ERROR_PRINT_DIRECT_FILE_NOT_EXISTS
```
protected static final int ERROR_PRINT_DIRECT_FILE_NOT_EXISTS
```
    See Also:
    Constant Field Values
  - ERROR_UNKNOWN_OPTION
```
protected static final int ERROR_UNKNOWN_OPTION
```
    See Also:
    Constant Field Values
  - ERROR_DIRECT_NOT_INDEXING
```
protected static final int ERROR_DIRECT_NOT_INDEXING
```
    See Also:
    Constant Field Values
  - ERROR_INVERTED_NOT_INDEXING
```
protected static final int ERROR_INVERTED_NOT_INDEXING
```
    See Also:
    Constant Field Values
  - ERROR_EXPAND_NOT_RETRIEVE
```
protected static final int ERROR_EXPAND_NOT_RETRIEVE
```
    See Also:
    Constant Field Values
  - ERROR_GIVEN_C_NOT_RETRIEVING
```
protected static final int ERROR_GIVEN_C_NOT_RETRIEVING
```
    See Also:
    Constant Field Values
  - ERROR_LANGUAGEMODEL_NOT_RETRIEVE
```
protected static final int ERROR_LANGUAGEMODEL_NOT_RETRIEVE
```
    See Also:
    Constant Field Values
  - ERROR_HADOOP_NOT_RETRIEVAL
```
protected static final int ERROR_HADOOP_NOT_RETRIEVAL
```
    See Also:
    Constant Field Values
  - ERROR_HADOOP_ONLY_INDEX
```
protected static final int ERROR_HADOOP_ONLY_INDEX
```
    See Also:
    Constant Field Values
- Constructor Detail
  - TrecTerrier
```
public TrecTerrier()
```
- Method Detail
  - version
```
protected void version()
```
    Prints the version information about Terrier
  - usage
```
protected void usage()
```
    Prints a help message that explains the possible options.
  - main
```
public static void main(String[] args)
```
    The main method that starts the application
    
    Parameters:
    args - the command line arguments
  - processOptions
```
protected int processOptions(String[] args)
```
    Processes the command line arguments and sets the corresponding properties accordingly.
    
    Parameters:
    args - the command line arguments.
    
    Returns:
    int zero if the command line arguments are processed successfully, otherwise it returns an error code.
  - run
```
public void run()
         throws Exception
```
    Calls the required classes from Terrier.
    
    Throws:
    
    Exception
  - applyOptions
```
public void applyOptions(int status)
                  throws Exception
```
    Apply the option resulted from processing the command line arguments
    
    Parameters:
    status - the status after process the command line arguments.
    
    Throws:
    
    Exception

Class TrecTerrier

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

unknownOption

evaluationFilename

queryexpand

printHelp

printVersion

indexing

singlePass

hadoop

retrieving

printdocid

printlexicon

printinverted

printdirect

printstats

printmeta

evaluation_per_query

evaluation_type

inverted

direct

c

evaluation

isParameterValueSpecified

inverted2direct

docids

ARGUMENTS_OK

ERROR_NO_ARGUMENTS

ERROR_NO_C_VALUE

ERROR_CONFLICTING_ARGUMENTS

ERROR_DIRECT_FILE_EXISTS

ERROR_DIRECT_FILE_NOT_EXISTS

ERROR_PRINT_DOCINDEX_FILE_NOT_EXISTS

ERROR_PRINT_LEXICON_FILE_NOT_EXISTS

ERROR_PRINT_INVERTED_FILE_NOT_EXISTS

ERROR_PRINT_STATS_FILE_NOT_EXISTS

ERROR_PRINT_DIRECT_FILE_NOT_EXISTS

ERROR_UNKNOWN_OPTION

ERROR_DIRECT_NOT_INDEXING

ERROR_INVERTED_NOT_INDEXING

ERROR_EXPAND_NOT_RETRIEVE

ERROR_GIVEN_C_NOT_RETRIEVING

ERROR_LANGUAGEMODEL_NOT_RETRIEVE

ERROR_HADOOP_NOT_RETRIEVAL

ERROR_HADOOP_ONLY_INDEX

Constructor Detail

TrecTerrier

Method Detail

version

usage

main

processOptions

run

applyOptions