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## org.biojava.bio.seq.db
Class TabIndexStore

    java.lang.Object
      org.biojava.bio.seq.db.TabIndexStore

All Implemented Interfaces:
  Serializable, IndexStore

    public class TabIndexStore

extends Object
implements IndexStore, Serializable

Implements IndexStore as a serialized file for the java data and a tab-delimited file of offsets.

Use the constructor to create a new index store. Use the static factory method open() to load an existing store.

The tab-delimited file looks like:

     fileNumber \t offset \t id \n

Author:
  Matthew Pocock, Thomas Down, Keith James, David Huen
See Also:
  Serialized Form

Constructor Summary
`TabIndexStore(File storeFile, File indexFile, String name, SequenceFormat format, SequenceBuilderFactory sbFactory, SymbolTokenization symbolParser)` Create a new TabIndexStore.

Method Summary
`protected void` | `addFile(File f)`
`void` | `commit()` Commit the stored indices to permanent storage.
`protected void` | `commitStore()`
`Index` | `fetch(String id)` Fetch an Index based upon an ID.
`protected int` | `getFileIndex(File file)`
`Set` | `getFiles()` Retrieve the Set of files that are currently indexed.
`SequenceFormat` | `getFormat()` Retrieve the format of the index file.
`Set` | `getIDs()` Retrieve the set of all current IDs.
`String` | `getName()` Retrieve the name of this store.
`SequenceBuilderFactory` | `getSBFactory()` Retrieve the SequenceBuilderFactory used to build Sequence instances.
`SymbolTokenization` | `getSymbolParser()` Retrieve the symbol parser used to turn the sequence characters into Symobl objects.
`protected void` | `initialize()`
`static TabIndexStore` | `open(File storeFile)` Open an existing index store.
`void` | `rollback()` Discard all uncommited changes.
`void` | `store(Index indx)` Add the Index to the store.

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

Constructor Detail

### TabIndexStore

    public TabIndexStore(File storeFile,
                         File indexFile,
                         String name,
                         SequenceFormat format,
                         SequenceBuilderFactory sbFactory,
                         SymbolTokenization symbolParser)
                  throws IOException,
                         BioException

  Create a new TabIndexStore.

  The store file and index file must not exist. This is to prevent you from accidentally destroying an existing index.

  Parameters:
    `storeFile` - the file that will be used to persist this index store
    `indexFile` - the file that will hold the actual indecies
    `name` - the name that will be used by the database backed by this index
    `format` - the SequenceFormat for files being indexed
    `sbFactory` - the SequenceBuilderFactory used in building sequences
    `symbolParser` - the SymbolTokenization to use
  Throws:
    `IOException` - if there was a problem writing the files
    `BioException` - if any of the parameters were not acceptable

Method Detail

### open

    public static TabIndexStore open(File storeFile)
                              throws IOException

  Open an existing index store.

  Parameters:
    `storeFile` - the File encapsulating the store
  Returns:
    a new TabIndexStore for that file
  Throws:
    `IOException` - if the storeFile could not be processed

### store

    public void store(Index indx)
               throws IllegalIDException,
                      BioException

  Description copied from interface: `IndexStore`
  Add the Index to the store.

  This method should be transactional. If the store fails, the IndexStore should be left in its original state.

  If the file of the Index is not known yet, it is the responsibility of the IndexStore to add it to the set returned by getFiles.

  Specified by:
    `store` in interface `IndexStore`
  Parameters:
    `indx` - the Index to add
  Throws:
    `IllegalIDException` - if the index has an invalid ID field
    `BioException` - if the store failed

### fetch

    public Index fetch(String id)
                throws IllegalIDException,
                       BioException

  Description copied from interface: `IndexStore`
  Fetch an Index based upon an ID.

  Specified by:
    `fetch` in interface `IndexStore`
  Parameters:
    `id` - The ID of the sequence Index to retrieve
  Throws:
    `IllegalIDException` - if the ID couldn't be found
    `BioException` - if the fetch fails in the underlying storage mechanism

### commit

    public void commit()
                throws BioException

  Description copied from interface: `IndexStore`
  Commit the stored indices to permanent storage.

  Specified by:
    `commit` in interface `IndexStore`
  Throws:
    `BioException` - if for any reason the commit fails

### rollback

    public void rollback()

  Description copied from interface: `IndexStore`
  Discard all uncommited changes.

  Specified by:
    `rollback` in interface `IndexStore`

### getName

    public String getName()

  Description copied from interface: `IndexStore`
  Retrieve the name of this store. This will be reflected as the name of the IndexedSequenceDB.

  Specified by:
    `getName` in interface `IndexStore`
  Returns:
    the String name of the index

### getIDs

    public Set getIDs()

  Description copied from interface: `IndexStore`
  Retrieve the set of all current IDs.

  This set should either be immutable, or modifiable totally separately from the IndexStore.

  Specified by:
    `getIDs` in interface `IndexStore`
  Returns:
    a Set of all legal IDs

### getFiles

    public Set getFiles()

  Description copied from interface: `IndexStore`
  Retrieve the Set of files that are currently indexed.

  Specified by:
    `getFiles` in interface `IndexStore`

### getFormat

    public SequenceFormat getFormat()

  Description copied from interface: `IndexStore`
  Retrieve the format of the index file.

  This set should either be immutable, or modifiable totally separately from the IndexStore.

  Specified by:
    `getFormat` in interface `IndexStore`
  Returns:
    a Set of all indexed files

### getSBFactory

    public SequenceBuilderFactory getSBFactory()

  Description copied from interface: `IndexStore`
  Retrieve the SequenceBuilderFactory used to build Sequence instances.

  Specified by:
    `getSBFactory` in interface `IndexStore`
  Returns:
    the associated SequenceBuilderFactory

### getSymbolParser

    public SymbolTokenization getSymbolParser()

  Description copied from interface: `IndexStore`
  Retrieve the symbol parser used to turn the sequence characters into Symobl objects.

  Specified by:
    `getSymbolParser` in interface `IndexStore`
  Returns:
    the associated SymbolParser

### commitStore

    protected void commitStore()
                        throws IOException

  Throws:
    `IOException`

### addFile

    protected void addFile(File f)

### getFileIndex

    protected int getFileIndex(File file)

### initialize

    protected void initialize()
                       throws IOException

  Throws:
    `IOException`

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