org.geotools.gce.imagemosaic.properties
Class DefaultPropertiesCollectorSPI

Object
  extended by DefaultPropertiesCollectorSPI
All Implemented Interfaces:
Factory, OptionalFactory, PropertiesCollectorSPI
Direct Known Subclasses:
ByteFileNameExtractorSPI, DoubleFileNameExtractorSPI, FloatFileNameExtractorSPI, IntegerFileNameExtractorSPI, LongFileNameExtractorSPI, ShortFileNameExtractorSPI, StringFileNameExtractorSPI

public abstract class DefaultPropertiesCollectorSPI
extends Object
implements PropertiesCollectorSPI


Field Summary
static String REGEX_PREFIX
           
 
Constructor Summary
DefaultPropertiesCollectorSPI(String name)
           
 
Method Summary
 PropertiesCollector create(Object o, List<String> propertyNames)
           
protected abstract  PropertiesCollector createInternal(PropertiesCollectorSPI fileNameExtractorSPI, List<String> propertyNames, String string)
           
 Map<RenderingHints.Key,?> getImplementationHints()
          Map of hints (maybe unmodifiable) used by this factory to customize its use.
 String getName()
           
 boolean isAvailable()
          Returns true if this factory is ready for use.
 
Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

REGEX_PREFIX

public static final String REGEX_PREFIX
See Also:
Constant Field Values
Constructor Detail

DefaultPropertiesCollectorSPI

public DefaultPropertiesCollectorSPI(String name)
Method Detail

getName

public String getName()
Specified by:
getName in interface PropertiesCollectorSPI

isAvailable

public boolean isAvailable()
Description copied from interface: OptionalFactory
Returns true if this factory is ready for use. An optional factory may returns false for now but returns true later. However, the converse is not recommended.

Specified by:
isAvailable in interface OptionalFactory

getImplementationHints

public Map<RenderingHints.Key,?> getImplementationHints()
Description copied from interface: Factory
Map of hints (maybe unmodifiable) used by this factory to customize its use. This map is not guaranteed to contains all the hints supplied by the user; it may be only a subset. Consequently, hints provided here are usually not suitable for creating new factories, unless the implementation make some additional garantees (e.g. FactoryUsingVolatileDependencies).

The primary purpose of this method is to determine if an existing factory instance can be reused for a set of user-supplied hints. This method is invoked by FactoryRegistry in order to compare this factory's hints against user's hints. This is dependency introspection only; FactoryRegistry never invokes this method for creating new factories.

Keys are usually static constants from the Hints class, while values are instances of some key-dependent class. The key set must contains at least all hints impacting functionality. While the key set may contains all hints supplied by the user, it is recommended to limit the set to only the hints used by this particular factory instance. A minimal set will helps FactoryRegistry to compare only hints that matter and avoid the creation of unnecessary instances of this factory.

The hint values may be different than the one supplied by the user. If a user supplied a hint as a Class object, this method shall replace it by the actual instance used, if possible.

Implementations of this method are usually quite simple. For example if a datum authority factory uses an ordinary datum factory, its method could be implemented as below (note that we should not check if the datum factory is null, since key with null value is the expected behaviour in this case). Example:


 Map hints = new HashMap();
 hints.put(Hints.DATUM_FACTORY, datumFactory);
 return hints;
 

Specified by:
getImplementationHints in interface Factory
Returns:
The map of hints, or an empty map if none.

create

public PropertiesCollector create(Object o,
                                  List<String> propertyNames)
Specified by:
create in interface PropertiesCollectorSPI

createInternal

protected abstract PropertiesCollector createInternal(PropertiesCollectorSPI fileNameExtractorSPI,
                                                      List<String> propertyNames,
                                                      String string)


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