All Known Implementing Classes:

AuditHandler, HandlerBase, JsonHandler, TextHandler, XmlHandler
```
public interface OutputHandler
```
Public interface for Jhove output handlers. All output handlers must implement OutputHandler, and in normal cases should subclass HandlerBase.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`analyze(RepInfo info)`	Callback allowing post-parse, pre-show analysis of object representation information.
`void`	`applyDefaultParams()`	Applies the default parameters.
`void`	`close()`	Do appropriate finalization after all output is complete.
`void`	`endDirectory()`	Callback indicating a directory is finished being processed.
`Date`	`getDate()`	Returns the last modification date of this handler
`String`	`getEncoding()`	Returns this handler's encoding.
`String`	`getName()`	Returns the name of this handler
`String`	`getNote()`	Returns this handler's note
`String`	`getRelease()`	Returns release information for this handler
`String`	`getRights()`	Returns this handler's copyright information
`List<Document>`	`getSpecification()`	Returns a List of Document objects giving the format specification documentation
`Agent`	`getVendor()`	Returns a List of Agent objects giving the vendor(s) of this handler.
`void`	`init(String init)`	Per-instantiation initialization.
`boolean`	`okToProcess(String filepath)`	Callback to give the handler the opportunity to decide whether or not to process a file.
`void`	`param(String param)`	Per-action initialization.
`void`	`reset()`	Reset the handler.
`void`	`resetParams()`	Reset parameter settings.
`void`	`setApp(App app)`	Assigns an application object to provide services to this handler
`void`	`setBase(JhoveBase je)`	Assigns the JHOVE engine object to provide services to this handler
`void`	`setDefaultParams(List<String> params)`	Sets list of default parameters.
`void`	`setEncoding(String encoding)`	Assigns the encoding to be used by this OutputHandler
`void`	`setWriter(PrintWriter output)`	Assigns a PrintWriter to do output for this OutputHandler
`void`	`show()`	Outputs minimal information about the application
`void`	`show(App app)`	Outputs detailed information about the application, including configuration, available modules and handlers, etc.
`void`	`show(Module module)`	Outputs information about a Module
`void`	`show(OutputHandler handler)`	Outputs information about the OutputHandler specified in the parameter
`void`	`show(RepInfo info)`	Outputs the information contained in a RepInfo object
`void`	`showFooter()`	Do the final output.
`void`	`showHeader()`	Do the initial output.
`void`	`startDirectory(String directory)`	Callback indicating a new directory is being processed.

- Method Detail
  - reset
```
void reset()
```
    Reset the handler. This needs to be called before each invocation.
  - analyze
```
void analyze(RepInfo info)
```
    Callback allowing post-parse, pre-show analysis of object representation information.
    
    Parameters:
    
    info - Object representation information
  - endDirectory
```
void endDirectory()
```
    Callback indicating a directory is finished being processed. Most handlers will do nothing.
  - getName
```
String getName()
```
    Returns the name of this handler
  - getRelease
```
String getRelease()
```
    Returns release information for this handler
  - getDate
```
Date getDate()
```
    Returns the last modification date of this handler
  - getSpecification
```
List<Document> getSpecification()
```
    Returns a List of Document objects giving the format specification documentation
    
    See Also:
    
    Document
  - getVendor
```
Agent getVendor()
```
    Returns a List of Agent objects giving the vendor(s) of this handler.
  - getNote
```
String getNote()
```
    Returns this handler's note
  - getRights
```
String getRights()
```
    Returns this handler's copyright information
  - getEncoding
```
String getEncoding()
```
    Returns this handler's encoding.
  - init
```
void init(String init)
   throws Exception
```
    Per-instantiation initialization.
    
    Parameters:
    
    init - Initialization parameter. This is typically obtained from the configuration file.
    
    Throws:
    
    Exception
  - okToProcess
```
boolean okToProcess(String filepath)
```
    Callback to give the handler the opportunity to decide whether or not to process a file. Most handlers will always return true.
    
    Parameters:
    
    filepath - File pathname
  - setDefaultParams
```
void setDefaultParams(List<String> params)
```
    Sets list of default parameters.
    
    Parameters:
    
    params - A List whose elements are Strings. May be empty.
  - applyDefaultParams
```
void applyDefaultParams()
                 throws Exception
```
    Applies the default parameters.
    
    Throws:
    
    Exception
  - resetParams
```
void resetParams()
          throws Exception
```
    Reset parameter settings. Returns to a default state without any parameters.
    
    Throws:
    
    Exception
  - param
```
void param(String param)
    throws Exception
```
    Per-action initialization.
    
    Parameters:
    
    param - Initialization parameter.
    
    Throws:
    
    Exception
  - setApp
```
void setApp(App app)
```
    Assigns an application object to provide services to this handler
  - setBase
```
void setBase(JhoveBase je)
```
    Assigns the JHOVE engine object to provide services to this handler
  - setEncoding
```
void setEncoding(String encoding)
```
    Assigns the encoding to be used by this OutputHandler
  - setWriter
```
void setWriter(PrintWriter output)
```
    Assigns a PrintWriter to do output for this OutputHandler
  - show
```
void show(Module module)
```
    Outputs information about a Module
  - show
```
void show(RepInfo info)
```
    Outputs the information contained in a RepInfo object
  - show
```
void show(OutputHandler handler)
```
    Outputs information about the OutputHandler specified in the parameter
  - show
```
void show()
```
    Outputs minimal information about the application
  - show
```
void show(App app)
```
    Outputs detailed information about the application, including configuration, available modules and handlers, etc.
  - showHeader
```
void showHeader()
```
    Do the initial output. This should be in a suitable format for including multiple files between the header and the footer.
  - showFooter
```
void showFooter()
```
    Do the final output. This should be in a suitable format for including multiple files between the header and the footer.
  - close
```
void close()
```
    Do appropriate finalization after all output is complete.
  - startDirectory
```
void startDirectory(String directory)
```
    Callback indicating a new directory is being processed. Most handlers will do nothing.
    
    Parameters:
    
    directory - Directory path

Interface OutputHandler

Method Summary

Method Detail

reset

analyze

endDirectory

getName

getRelease

getDate

getSpecification

getVendor

getNote

getRights

getEncoding

init

okToProcess

setDefaultParams

applyDefaultParams

resetParams

param

setApp

setBase

setEncoding

setWriter

show

show

show

show

show

showHeader

showFooter

close

startDirectory