org.compass.core.converter.dynamic
Class AbstractDynamicConverter

java.lang.Object
  org.compass.core.converter.basic.AbstractBasicConverter
      org.compass.core.converter.dynamic.AbstractDynamicConverter

All Implemented Interfaces:

Converter, DynamicConverter, ResourcePropertyConverter

Direct Known Subclasses:

GroovyDynamicConverter, JakartaElDynamicConverter, JexlDynamicConverter, OgnlDynamicConverter, VelocityDynamicConverter

public abstract class AbstractDynamicConverter
extends AbstractBasicConverter
implements DynamicConverter

A simple base class for DynamicConverter. Requires implementation of evaluate(Object,org.compass.core.mapping.ResourcePropertyMapping).

Also holds a FormatConverter for expression that return formatable objects (like Date).

Author:

kimchy

Field Summary

Fields inherited from interface org.compass.core.converter.dynamic.DynamicConverter

DATA_CONTEXT_KEY

Constructor Summary

AbstractDynamicConverter()

Method Summary

protected void	addProperty(Object value, ResourcePropertyMapping resourcePropertyMapping, SearchEngine searchEngine, Object root, MarshallingContext context, Resource resource)
DynamicConverter	copy() Copies over the dynamic converter.
protected abstract Object	evaluate(Object o, ResourcePropertyMapping resourcePropertyMapping) Evaluates the given data object using the configured expression.
Object	fromString(String str, ResourcePropertyMapping resourcePropertyMapping) Does nothing since there is no meaning for un-marshalling for dynamic converters
Class	getType() The return type of the evaluated expression.
boolean	marshall(Resource resource, Object root, Mapping mapping, MarshallingContext context) Marshall the given Object to the given Resource.
void	setFormatConverter(FormatConverter formatConverter) If the dynamic expression evaluates to a formatable object (like Date), the format converter that will be used to format it.
void	setType(Class type) The return type of the evaluated expression.
Object	unmarshall(Resource resource, Mapping mapping, MarshallingContext context) Does nothing since there is no meaning for un-marshalling for dynamic converters

Methods inherited from class org.compass.core.converter.basic.AbstractBasicConverter

doSetBoost, getNullValue, handleNulls, isNullValue, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.compass.core.converter.dynamic.DynamicConverter

setExpression

Constructor Detail

AbstractDynamicConverter

public AbstractDynamicConverter()

Method Detail

copy

public DynamicConverter copy()

Description copied from interface: DynamicConverter

Copies over the dynamic converter.

Specified by:

copy in interface DynamicConverter

setFormatConverter

public void setFormatConverter(FormatConverter formatConverter)

Description copied from interface: DynamicConverter

If the dynamic expression evaluates to a formatable object (like Date), the format converter that will be used to format it.

Specified by:

setFormatConverter in interface DynamicConverter

marshall

public boolean marshall(Resource resource,
                        Object root,
                        Mapping mapping,
                        MarshallingContext context)
                 throws ConversionException

Description copied from interface: Converter

Marshall the given Object to the given Resource. Will use the mapping definition as to how to marshall the object.

Returns true if data was saved in the index, and it can be read as well (i.e. stored).

Specified by:

marshall in interface Converter

Overrides:

marshall in class AbstractBasicConverter

Parameters:

resource - The resource to marhsall the object to

root - The Object to marshall to the resource

mapping - The mapping definition of how to marshall the Object to the resoruce

context - The context for the current marhslling process

Returns:

true if data was saved in the the index that can be read.

Throws:

ConversionException

addProperty

protected void addProperty(Object value,
                           ResourcePropertyMapping resourcePropertyMapping,
                           SearchEngine searchEngine,
                           Object root,
                           MarshallingContext context,
                           Resource resource)

evaluate

protected abstract Object evaluate(Object o,
                                   ResourcePropertyMapping resourcePropertyMapping)
                            throws ConversionException

Evaluates the given data object using the configured expression.

Parameters:

o - The data object

resourcePropertyMapping - The resource mapping

Returns:

The object returned as a result of expression evaluation

Throws:

ConversionException

unmarshall

public Object unmarshall(Resource resource,
                         Mapping mapping,
                         MarshallingContext context)
                  throws ConversionException

Does nothing since there is no meaning for un-marshalling for dynamic converters

Specified by:

unmarshall in interface Converter

Overrides:

unmarshall in class AbstractBasicConverter

Parameters:

resource - The resource to unmarshall into an Object

mapping - The mapping definition of how to unmarshall the Resource into an Object

context - The context for the current marshalling process

Returns:

The object unmarshalled

Throws:

ConversionException

fromString

public Object fromString(String str,
                         ResourcePropertyMapping resourcePropertyMapping)
                  throws ConversionException

Does nothing since there is no meaning for un-marshalling for dynamic converters

Specified by:

fromString in interface ResourcePropertyConverter

Parameters:

str - The string to convert from

resourcePropertyMapping - The resource property mapping

Returns:

Theh object converterd from the String

Throws:

ConversionException

getType

public Class getType()

Description copied from interface: DynamicConverter

The return type of the evaluated expression.

Specified by:

getType in interface DynamicConverter

setType

public void setType(Class type)

Description copied from interface: DynamicConverter

The return type of the evaluated expression.

Specified by:

setType in interface DynamicConverter