com.izforge.izpack.util.file.types.selectors

Class BaseSelector

java.lang.Object

com.izforge.izpack.util.file.types.DataType

com.izforge.izpack.util.file.types.selectors.BaseSelector

All Implemented Interfaces:

FileSelector

Direct Known Subclasses:

BaseExtendSelector, BaseSelectorContainer, ExtendSelector, MappingSelector, PresentSelector

public abstract class BaseSelector
extends DataType
implements FileSelector

A convenience base class that you can subclass Selectors from. It provides some helpful common behaviour. Note that there is no need for Selectors to inherit from this class, it is only necessary that they implement FileSelector.

Constructor Summary

Constructors

Constructor and Description
BaseSelector() Do nothing constructor.

Method Summary

Modifier and Type	Method and Description
String	getError() Returns any error messages that have been set.
abstract boolean	isSelected(InstallData idata, File basedir, String filename, File file) Method that each selector will implement to create their selection behaviour.
void	setError(String msg) Allows all selectors to indicate a setup error.
void	validate() Subclasses can use this to throw the requisite exception in isSelected() in the case of an error condition.
void	verifySettings() Subclasses can override this method to provide checking of their state.

Methods inherited from class com.izforge.izpack.util.file.types.DataType

getDescription, isChecked, noChildrenAllowed, setChecked, setDescription, tooManyAttributes

Methods inherited from class java.lang.Object

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

Constructor Detail

BaseSelector

public BaseSelector()

Do nothing constructor.

Method Detail

setError

public void setError(String msg)

Allows all selectors to indicate a setup error. Note that only the first error message is recorded.

Parameters:

msg - The error message any BuildException should throw.

getError

public String getError()

Returns any error messages that have been set.

Returns:

the error condition

verifySettings

public void verifySettings()
                    throws Exception

Subclasses can override this method to provide checking of their state. So long as they call validate() from isSelected(), this will be called automatically (unless they override validate()).

Implementations should check for incorrect settings and call setError() as necessary.

Throws:

Exception

validate

public void validate()
              throws Exception

Subclasses can use this to throw the requisite exception in isSelected() in the case of an error condition.

Throws:

Exception

isSelected

public abstract boolean isSelected(InstallData idata,
                                   File basedir,
                                   String filename,
                                   File file)
                            throws Exception

Method that each selector will implement to create their selection behaviour. If there is a problem with the setup of a selector, it can throw a BuildException to indicate the problem.

Specified by:

isSelected in interface FileSelector

Parameters:

basedir - A java.io.File object for the base directory

filename - The name of the file to check

file - A File object for this filename

Returns:

whether the file should be selected or not

Throws:

Exception