adams.flow.transformer
Class GUNZIP

java.lang.Object
  adams.core.ConsoleObject
      adams.core.option.AbstractOptionHandler
          adams.flow.core.AbstractActor
              adams.flow.transformer.AbstractTransformer
                  adams.flow.transformer.AbstractSingleDecompress
                      adams.flow.transformer.GUNZIP

All Implemented Interfaces:

AdditionalInformationHandler, CleanUpHandler, Debuggable, DebugOutputHandler, Destroyable, OptionHandler, QuickInfoSupporter, ShallowCopySupporter<AbstractActor>, SizeOfHandler, Stoppable, VariableChangeListener, ErrorHandler, InputConsumer, OutputProducer, Serializable, Comparable

public class GUNZIP
extends AbstractSingleDecompress

Decompresses an archive that was compressed with gzip. It is assumed, that the file ends with .gz. If that is not the case, an alternative filename has to be provided.
The filename of the generated output filename is then broadcasted.

Input/output:
- accepts:
java.lang.String
java.io.File
- generates:
java.lang.String

Valid options are:

-D (property: debug)
    If set to true, scheme may output additional info to the console.
 

-name <java.lang.String> (property: name)
    The name of the actor.
    default: GUNZIP
 

-annotation <adams.core.base.BaseText> (property: annotations)
    The annotations to attach to this actor.
    default:
 

-skip (property: skip)
    If set to true, transformation is skipped and the input token is just forwarded
    as it is.
 

-use-out-dir (property: useAlternativeOutputDir)
    By default the compressed file will be uncompressed at the same location
    as the archive with the .gz extension; use this option to enabled the selection
    of a different output directory.
 

-out-dir <adams.core.io.PlaceholderFile> (property: alternativeOutputDir)
    The alternative output directory to use.
    default: .
 

-alt-filename <java.lang.String> (property: alternativeFilename)
    The alternative filename to use, instead of the one from the input file
    with the .gz extension removed.
    default:
 

-buffer <int> (property: bufferSize)
    The size of the buffer in bytes for the data stream.
    default: 1024
 

Version:

$Revision: 4584 $

Author:

fracpete (fracpete at waikato dot ac dot nz)

See Also:

Serialized Form

Field Summary

Fields inherited from class adams.flow.transformer.AbstractSingleDecompress

DUMMY_EXTENSION, m_AlternativeFilename, m_AlternativeOutputDir, m_BufferSize, m_UseAlternativeOutputDir

Fields inherited from class adams.flow.transformer.AbstractTransformer

BACKUP_INPUT, BACKUP_OUTPUT, m_InputToken, m_OutputToken

Fields inherited from class adams.flow.core.AbstractActor

FILE_EXTENSION, FILE_EXTENSION_GZ, m_Annotations, m_BackupState, m_DetectedObjectVariables, m_DetectedVariables, m_ErrorHandler, m_Executed, m_FullName, m_Headless, m_Name, m_Parent, m_Root, m_Self, m_Skip, m_StopFlowOnError, m_StopMessage, m_Stopped, m_StorageHandler, m_VariablesUpdated

Fields inherited from class adams.core.option.AbstractOptionHandler

m_DebugLevel, m_OptionManager

Constructor Summary

GUNZIP()

Method Summary

String	alternativeFilenameTipText() Returns the tip text for this property.
protected String	decompress(File inFile, File outFile) Decompresses the archive.
protected String	getDefaultExtension() Returns the default extension that the compressed archive has, e.g., ".gz" for gzipped files.
String	globalInfo() Returns a string describing the object.
String	useAlternativeOutputDirTipText() Returns the tip text for this property.

Methods inherited from class adams.flow.transformer.AbstractSingleDecompress

accepts, alternativeOutputDirTipText, bufferSizeTipText, defineOptions, doExecute, generates, getAlternativeFilename, getAlternativeOutputDir, getBufferSize, getQuickInfo, getUseAlternativeOutputDir, setAlternativeFilename, setAlternativeOutputDir, setBufferSize, setUseAlternativeOutputDir

Methods inherited from class adams.flow.transformer.AbstractTransformer

backupState, execute, hasPendingOutput, input, output, postExecute, reset, restoreState, wrapUp

Methods inherited from class adams.flow.core.AbstractActor

annotationsTipText, canInspectOptions, canPerformSetUpCheck, cleanUp, compareTo, debug, destroy, equals, findVariables, findVariables, findVariables, forceVariables, forCommandLine, forName, getAdditionalInformation, getAnnotations, getDefaultName, getDetectedVariables, getErrorHandler, getFlowActors, getFullName, getName, getNextSibling, getParent, getPreviousSibling, getRoot, getSkip, getStopFlowOnError, getStopMessage, getStorageHandler, getVariables, handleError, hasErrorHandler, hasStopMessage, index, initialize, isBackedUp, isExecuted, isFinished, isHeadless, isStopped, nameTipText, performSetUpChecks, preExecute, pruneBackup, pruneBackup, setAnnotations, setErrorHandler, setHeadless, setName, setParent, setSkip, setStopFlowOnError, setUp, setVariables, shallowCopy, shallowCopy, sizeOf, skipTipText, stopExecution, stopExecution, stopFlowOnErrorTipText, updateDetectedVariables, updatePrefix, updateVariables, variableChanged

Methods inherited from class adams.core.option.AbstractOptionHandler

cleanUpOptions, debug, debugLevelTipText, finishInit, getDebugLevel, getOptionManager, isDebugOn, newOptionManager, setDebugLevel, toCommandLine, toString

Methods inherited from class adams.core.ConsoleObject

getDebugging, getSystemErr, getSystemOut

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

GUNZIP

public GUNZIP()

Method Detail

globalInfo

public String globalInfo()

Returns a string describing the object.

Specified by:

globalInfo in class AbstractOptionHandler

Returns:

a description suitable for displaying in the gui

useAlternativeOutputDirTipText

public String useAlternativeOutputDirTipText()

Returns the tip text for this property.

Specified by:

useAlternativeOutputDirTipText in class AbstractSingleDecompress

Returns:

tip text for this property suitable for displaying in the GUI or for listing the options.

alternativeFilenameTipText

public String alternativeFilenameTipText()

Returns the tip text for this property.

Specified by:

alternativeFilenameTipText in class AbstractSingleDecompress

Returns:

tip text for this property suitable for displaying in the GUI or for listing the options.

getDefaultExtension

protected String getDefaultExtension()

Returns the default extension that the compressed archive has, e.g., ".gz" for gzipped files.

Specified by:

getDefaultExtension in class AbstractSingleDecompress

Returns:

the extension, including the dot

decompress

protected String decompress(File inFile,
                            File outFile)

Decompresses the archive.

Specified by:

decompress in class AbstractSingleDecompress

Parameters:

inFile - the compressed archive

outFile - the decompressed output file

Returns:

null if successful, otherwise error message