net.sf.mmm.util.value.impl
Class ValueConverterToBoolean

java.lang.Object
  net.sf.mmm.util.component.base.AbstractComponent
      net.sf.mmm.util.component.base.AbstractLoggableComponent
          net.sf.mmm.util.value.base.AbstractSimpleValueConverter<Object,Boolean>
              net.sf.mmm.util.value.impl.ValueConverterToBoolean

All Implemented Interfaces:

SimpleValueConverter<Object,Boolean>, ValueConverter<Object,Boolean>

@Singleton
@Named
public class ValueConverterToBoolean
extends AbstractSimpleValueConverter<Object,Boolean>

This is an implementation of the ValueConverter interface that converts an Object to a Boolean.

Since:

1.0.1

Author:

Joerg Hohwiller (hohwille at users.sourceforge.net)

Field Summary

private StringUtil

stringUtil

Constructor Summary

ValueConverterToBoolean()
The constructor.

Method Summary

Boolean	convert(Object value, Object valueSource, Class<? extends Boolean> targetClass) This method converts the given pojo to the <TARGET>-type.
protected void	doInitialize() This method performs the actual initialization.
Class<Object>	getSourceType() This the type of the value accepted by this converter.
protected StringUtil	getStringUtil() This method gets the StringUtil to use.
Class<Boolean>	getTargetType() Is the guaranteed return-type of the conversion.
void	setStringUtil(StringUtil stringUtil) This method sets the StringUtil to use.

Methods inherited from class net.sf.mmm.util.value.base.AbstractSimpleValueConverter

convert

Methods inherited from class net.sf.mmm.util.component.base.AbstractLoggableComponent

getLogger, setLogger

Methods inherited from class net.sf.mmm.util.component.base.AbstractComponent

doInitialized, getInitializationState, initialize

Methods inherited from class java.lang.Object

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

Field Detail

stringUtil

private StringUtil stringUtil

See Also:

getStringUtil()

Constructor Detail

ValueConverterToBoolean

public ValueConverterToBoolean()

The constructor.

Method Detail

getStringUtil

protected StringUtil getStringUtil()

This method gets the StringUtil to use.

Returns:

the StringUtil instance.

setStringUtil

@Inject
public void setStringUtil(StringUtil stringUtil)

This method sets the StringUtil to use.

Parameters:

stringUtil - is the StringUtil instance.

doInitialize

protected void doInitialize()

This method performs the actual initialization. It is called when AbstractComponent.initialize() is invoked for the first time.
ATTENTION:
When you override this method from a sub-class you need to do a super.AbstractComponent.doInitialize().

Overrides:

doInitialize in class AbstractLoggableComponent

getSourceType

public Class<Object> getSourceType()

This the type of the value accepted by this converter. Use Object if you want to accept any value. A very common source-type is String.

Returns:

the source-type.

getTargetType

public Class<Boolean> getTargetType()

Is the guaranteed return-type of the conversion. This information is used externally to choose the most specific ValueConverter that is appropriate for the conversion.
E.g. a generic converter can have Object as target-type while a specific converter may have Collection as target-type. Now if an object (compliant with the source-type) needs to be converted to a Collection or List, the specific converter is used while for other objects the generic converter is chosen.
Please note that the target-type is often more general than the actual returned result. So a ValueConverter that converts a comma-separated String to an ArrayList will typically declare List as target-type.

Returns:

the target-type.

convert

public Boolean convert(Object value,
                       Object valueSource,
                       Class<? extends Boolean> targetClass)

This method converts the given pojo to the <TARGET>-type.

Parameters:

value - is the value to convert.

valueSource - describes the source of the value. This may be the filename where the value was read from, an XPath where the value was located in an XML document, etc. It is used in exceptions thrown if something goes wrong. This will help to find the problem easier.

targetClass - is the type to convert the value to.

Returns:

the converted value or null if the conversion is NOT possible. The returned value has to be an instance of the given targetType.

See Also:

ValueConverter.convert(Object, Object, GenericType)