svn-gvsig-desktop / branches / v2_0_0_prep / libraries / libFMap_dal / src / org / gvsig / fmap / dal / feature / FeatureStore.java @ 34112
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package org.gvsig.fmap.dal.feature; |
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import java.util.Iterator; |
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import java.util.List; |
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import org.cresques.cts.IProjection; |
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import org.gvsig.fmap.dal.DataServerExplorer; |
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import org.gvsig.fmap.dal.DataStore; |
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import org.gvsig.fmap.dal.DataStoreParameters; |
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import org.gvsig.fmap.dal.exception.DataException; |
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import org.gvsig.fmap.dal.exception.ReadException; |
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import org.gvsig.fmap.dal.feature.exception.FeatureIndexException; |
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import org.gvsig.fmap.dal.feature.exception.NeedEditingModeException; |
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import org.gvsig.fmap.dal.feature.spi.FeatureStoreProvider; |
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import org.gvsig.fmap.geom.Geometry; |
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import org.gvsig.fmap.geom.primitive.Envelope; |
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import org.gvsig.tools.dispose.DisposableIterator; |
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import org.gvsig.tools.dynobject.DynObject; |
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import org.gvsig.tools.observer.Observer; |
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import org.gvsig.tools.undo.UndoRedoStack; |
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/**
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* <p>
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* A FeatureStore is a type of store whose data consists on sets of
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* {@link Feature}(s). {@link Feature}(s) from the same FeatureStore can be of
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* different {@link FeatureType}(s) (as in GML format for instance).
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* </p>
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*
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* <p>
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* FeatureStore allows:
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* </p>
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* <ul>
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* <li>Obtaining the default {@link FeatureType}. A FeatureStore always has one
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* and only one default FeatureType.
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* <li>Obtaining the list of {@link FeatureType}(s) defined in the FeatureStore.
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* <li>Obtaining, filtering and sorting subsets of data ({@link FeatureSet})
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* through {@link FeatureQuery}, as well as background loading.
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* <li>Obtaining the total {@link Envelope} (AKA bounding box or extent) of the
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* store.
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* <li>Support for editing {@link FeatureType}(s).
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* <li>Obtaining information about contained {@link Geometry} types.
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* <li>Exporting to another store.
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* <li>Indexing.
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* <li>Selection.
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* <li>Locks management.
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* </ul>
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*
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*/
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public interface FeatureStore extends DataStore, UndoRedoStack { |
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public static final String METADATA_DEFINITION_NAME = "FeatureStore"; |
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/** Indicates that this store is in query mode */
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final static int MODE_QUERY = 0; |
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/** Indicates that this store is in full edit mode */
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final static int MODE_FULLEDIT = 1; |
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/** Indicates that this store is in append mode */
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final static int MODE_APPEND = 2; |
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/*
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* =============================================================
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*
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* information related services
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*/
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/**
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* Indicates whether this store allows writing.
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*
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* @return
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* true if this store can be written, false if not.
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*/
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public boolean allowWrite(); |
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/**
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* Returns this store's default {@link FeatureType}.
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*
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* @return
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* this store's default {@link FeatureType}.
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*
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* @throws DataException
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*/
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public FeatureType getDefaultFeatureType() throws DataException; |
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/**
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* Returns this store's featureType {@link FeatureType} matches with
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* featureTypeId.
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*
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* @param featureTypeId
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*
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* @return this store's default {@link FeatureType}.
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*
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* @throws DataException
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*/
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public FeatureType getFeatureType(String featureTypeId) |
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throws DataException;
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/**
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* Returns this store's {@link FeatureType}(s).
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*
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* @return a list with this store's {@link FeatureType}(s).
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*
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* @throws DataException
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*/
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public List getFeatureTypes() throws DataException; |
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/**
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* Returns this store's parameters.
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*
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* @return
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* {@link DataStoreParameters} containing this store's parameters
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*/
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public DataStoreParameters getParameters();
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/**
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*@throws DataException
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* @deprecated Mirar de cambiarlo a metadatos
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*/
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public boolean canWriteGeometry(int gvSIGgeometryType) throws DataException; |
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/**
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* Returns this store's total envelope (extent).
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*
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* @return this store's total envelope (extent) or <code>null</code> if
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* store not have geometry information
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*/
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public Envelope getEnvelope() throws DataException; |
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/**
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*
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* @deprecated use getDefaultFeatureType().getDefaultSRS()
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* @return
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* @throws DataException
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*/
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public IProjection getSRSDefaultGeometry() throws DataException; |
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/**
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* Exports this store to another store.
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*
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* @param explorer
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* {@link DataServerExplorer} target
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* @param params
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* New parameters of this store that will be used on the target
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* explorer
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*
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* @throws DataException
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*
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* @Deprecated this method is unstable
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*/
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public void export(DataServerExplorer explorer, String provider, NewFeatureStoreParameters params) |
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throws DataException;
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/*
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* =============================================================
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*
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* Query related services
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*/
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/**
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* Returns all available features in the store.
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* <p>
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* <em>
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* <strong>NOTE:</strong> if you use this method to get a
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* {@link FeatureSet}, you must get sure it is disposed
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* (@see {@link DisposableIterator#dispose()}) in any case, even if an
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* error occurs while getting the data. It is recommended to use the
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* <code>accept</code> methods instead, which handle everything for you.
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* Take into account the accept methods may use a fast iterator to
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* get the features.
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* </em>
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* </p>
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*
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* @see #accept(org.gvsig.tools.visitor.Visitor)
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*
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* @return a collection of features
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* @throws ReadException
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* if there is any error while reading the features
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*/
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FeatureSet getFeatureSet() throws DataException;
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/**
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* Returns a subset of features taking into account the properties and
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* restrictions of the FeatureQuery.
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* <p>
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* <em>
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* <strong>NOTE:</strong> if you use this method to get a
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* {@link FeatureSet}, you must get sure it is disposed
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* (@see {@link DisposableIterator#dispose()}) in any case, even if an
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* error occurs while getting the data. It is recommended to use the
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* <code>accept</code> methods instead, which handle everything for you.
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* Take into account the accept methods may use a fast iterator to
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* get the features.
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* </em>
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* </p>
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*
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* @see #accept(org.gvsig.tools.visitor.Visitor,
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* org.gvsig.fmap.dal.DataQuery)
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*
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* @param featureQuery
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* defines the characteristics of the features to return
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* @return a collection of features
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* @throws ReadException
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* if there is any error while reading the features
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*/
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FeatureSet getFeatureSet(FeatureQuery featureQuery) |
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throws DataException;
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/**
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* Loads a subset of features taking into account the properties and
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* restrictions of the FeatureQuery. Feature loading is performed by calling
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* the Observer, once each loaded Feature.
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*
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* @param featureQuery
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* defines the characteristics of the features to return
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* @param observer
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* to be notified of each loaded Feature
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* @throws DataException
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* if there is any error while loading the features
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*/
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void getFeatureSet(FeatureQuery featureQuery, Observer observer) |
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throws DataException;
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/**
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* Loads all available feature in the store. The loading of Features is
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* performed by calling the Observer, once each loaded Feature.
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*
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* @param observer
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* to be notified of each loaded Feature
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* @throws DataException
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* if there is any error while loading the features
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*/
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void getFeatureSet(Observer observer) throws DataException; |
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/**
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* Returns the feature given its reference.
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*
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* @param reference
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* a unique FeatureReference
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* @return
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* The Feature
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*
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* @throws DataException
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*
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*/
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public Feature getFeatureByReference(FeatureReference reference) throws DataException; |
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/**
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* Returns the feature given its reference and feature type.
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*
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* @param reference
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* a unique FeatureReference
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*
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* @param featureType
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* FeatureType to which the requested Feature belongs
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*
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* @return
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* The Feature
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*
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* @throws DataException
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*
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*/
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public Feature getFeatureByReference(FeatureReference reference, FeatureType featureType)
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throws DataException;
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/*
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* =============================================================
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*
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* Editing related services
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*/
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/**
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* Enters editing state.
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*/
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public void edit() throws DataException; |
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/**
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* Enters editing state specifying the editing mode.
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*
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* @param mode
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*
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* @throws DataException
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*/
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public void edit(int mode) throws DataException; |
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/**
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* Cancels all editing since the last edit().
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*
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* @throws DataException
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*/
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public void cancelEditing() throws DataException; |
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/**
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* Exits editing state.
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*
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* @throws DataException
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*/
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public void finishEditing() throws DataException; |
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/**
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* Indicates whether this store is in editing state.
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*
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* @return
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* true if this store is in editing state, false if not.
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*/
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public boolean isEditing(); |
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/**
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* Indicates whether this store is in appending state. In this state the new
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* features are automatically inserted at the end of the {@link FeatureSet}.
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*
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* @return true if this store is in appending state.
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*/
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public boolean isAppending(); |
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/**
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* Updates a {@link FeatureType} in the store with the changes in the
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* {@link EditableFeatureType}.<br>
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*
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* Any {@link FeatureSet} from this store that are used will be invalidated.
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*
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* @param featureType
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* an {@link EditableFeatureType} with the changes.
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*
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* @throws DataException
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*/
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public void update(EditableFeatureType featureType) throws DataException; |
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/**
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* Updates a {@link Feature} in the store with the changes in the
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* {@link EditableFeature}.<br>
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*
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* Any {@link FeatureSet} from this store that was still in use will be
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* invalidated. You can override this using
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* {@link FeatureSet#update(EditableFeature)}.
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*
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* @param feature
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* the feature to be updated
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*
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* @throws DataException
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*/
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public void update(EditableFeature feature) throws DataException; |
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/**
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* Deletes a {@link Feature} from the store.<br>
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*
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* Any {@link FeatureSet} from this store that was still in use will be
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* invalidated. You can override this using {@link Iterator#remove()} from
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* {@link FeatureSet}.
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*
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* @param feature
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* The feature to be deleted.
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*
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* @throws DataException
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*/
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public void delete(Feature feature) throws DataException; |
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/**
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* Inserts a {@link Feature} in the store.<br>
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*
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* Any {@link FeatureSet} from this store that was still in use will be
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* invalidated. You can override this using
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* {@link FeatureSet#insert(EditableFeature)}.
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*
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* @param feature
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* The feature to be inserted
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*
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* @throws DataException
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*/
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public void insert(EditableFeature feature) throws DataException; |
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/**
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* Creates a new feature using the default feature type and returns it as an
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* {@link EditableFeature}
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*
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* @return a new feature in editable state
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*
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* @throws DataException
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*/
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public EditableFeature createNewFeature() throws DataException; |
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/**
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* Creates a new feature of the given {@link FeatureType} and uses the given
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* {@link Feature} as default values to initialize it.
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*
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* @param type
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* the new feature's feature type
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*
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* @param defaultValues
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* a feature whose values are used as default values for the new
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* feature.
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*
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* @return the new feature.
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*
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* @throws DataException
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*/
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public EditableFeature createNewFeature(FeatureType type,
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Feature defaultValues) throws DataException;
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/**
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* Creates a new feature of the given {@link FeatureType}. The flag
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* defaultValues is used to indicate whether the new feature should be
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* initialized with default values or not.
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*
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* @param type
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* the new feature's feature type
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*
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* @param defaultValues
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* if true the new feature is initialized with each attribute's default value.
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*
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* @return
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* the new feature
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*
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* @throws DataException
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*/
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public EditableFeature createNewFeature(FeatureType type,
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boolean defaultValues) throws DataException; |
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/**
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* Creates a new feature of default {@link FeatureType}. The flag
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* defaultValues is used to indicate whether the new feature should be
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* initialized with default values or not.
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*
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* @param defaultValues
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* if true the new feature is initialized with each attribute's default value.
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*
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* @return
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* the new feature
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*
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* @throws DataException
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*/
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public EditableFeature createNewFeature(boolean defaultValues) |
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throws DataException;
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/**
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* Applies the validation rules associated to the given mode to the active {@link FeatureSet}.
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*
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* @param mode
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* can be one of {MODE_QUERY, MODE_FULLEDIT, MODE_APPEND}
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*
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* @throws DataException
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*/
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public void validateFeatures(int mode) throws DataException; |
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|
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/**
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* Indicates whether this store supports append mode.
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*
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* @return
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* true if this store supports append mode.
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*/
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public boolean isAppendModeSupported(); |
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|
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/**
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* Initiates an editing group. This is typically used to group series of
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* store editing operations.
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*
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* @param description
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* Description of the editing group.
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*
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* @throws NeedEditingModeException
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*/
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public void beginEditingGroup(String description) |
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throws NeedEditingModeException;
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/**
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* Finishes an editing group.
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*
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* @throws NeedEditingModeException
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*/
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public void endEditingGroup() throws NeedEditingModeException; |
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|
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/*
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* =============================================================
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*
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* Index related services
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*/
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/**
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* Creates a FeatureIndex with name indexName, given the attributeName and
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* its featureType.
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*
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* @param featureType
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* The FeatureType to which the indexed attribute belongs.
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*
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* @param attributeName
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* The name of the attributed to be indexed
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*
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* @param indexName
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* The index name
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*
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* @return the resulting FeatureIndex
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*
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*
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* @throws FeatureIndexException
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*/
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public FeatureIndex createIndex(FeatureType featureType,
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String attributeName, String indexName) throws DataException; |
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|
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/**
|
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* Creates a FeatureIndex with name indexName, given the attributeName and
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* its featureType. This method is intended for background indexing. It
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* receives an observer that will be notified by the process.
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*
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* @param featureType
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* The FeatureType to which the indexed attribute belongs.
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*
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* @param attributeName
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* The name of the attributed to be indexed
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*
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* @param indexName
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* The index name
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*
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* @param observer
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* an observer that will be notified of the indexing process
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* progress.
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*
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* @return the resulting FeatureIndex
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*
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*
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* @throws FeatureIndexException
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*/
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public FeatureIndex createIndex(FeatureType featureType,
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String attributeName, String indexName, Observer observer) throws DataException; |
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/**
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* Returns a FeatureIndexes structure containing all available indexes in
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* the store.
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*
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* @return
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*/
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public FeatureIndexes getIndexes();
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|
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/*
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* =============================================================
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*
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* Selection related services
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*/
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|
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/**
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* Sets the selection to the passed {@link FeatureSet}
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*
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* @param selection
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* A {@link FeatureSet} with the requested selection
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*/
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public void setSelection(FeatureSet selection) throws DataException; |
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|
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/**
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* Creates a {@link FeatureSelection}
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*
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* @return
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* a {@link FeatureSelection}
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*
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* @throws DataException
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*/
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public FeatureSelection createFeatureSelection() throws DataException; |
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|
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/**
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* Returns the current {@link FeatureSelection}.
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*
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* @return
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561 |
* current {@link FeatureSelection}.
|
562 |
*
|
563 |
* @throws DataException
|
564 |
*/
|
565 |
public FeatureSelection getFeatureSelection() throws DataException; |
566 |
|
567 |
/*
|
568 |
* =============================================================
|
569 |
*
|
570 |
* Lock related services
|
571 |
*/
|
572 |
|
573 |
/**
|
574 |
* Indicates whether this store supports locks.
|
575 |
*
|
576 |
* @return
|
577 |
* true if this store supports locks, false if not.
|
578 |
*/
|
579 |
public boolean isLocksSupported(); |
580 |
|
581 |
/**
|
582 |
* Returns the set of locked features
|
583 |
*
|
584 |
* @return
|
585 |
* set of locked features
|
586 |
*
|
587 |
* @throws DataException
|
588 |
*/
|
589 |
public FeatureLocks getLocks() throws DataException; |
590 |
|
591 |
/*
|
592 |
* =============================================================
|
593 |
* Transforms related services
|
594 |
* =============================================================
|
595 |
*/
|
596 |
|
597 |
/**
|
598 |
* Returns this store transforms
|
599 |
*
|
600 |
* @return
|
601 |
* this store transforms
|
602 |
*/
|
603 |
public FeatureStoreTransforms getTransforms();
|
604 |
|
605 |
/**
|
606 |
* Returns a new {@link FeatureQuery} associated to this store.
|
607 |
*
|
608 |
* @return
|
609 |
* a new {@link FeatureQuery} associated to this store.
|
610 |
*/
|
611 |
public FeatureQuery createFeatureQuery();
|
612 |
|
613 |
/**
|
614 |
* Returns featue count of this store.
|
615 |
*
|
616 |
* @return
|
617 |
* @throws DataException
|
618 |
*/
|
619 |
public long getFeatureCount() throws DataException; |
620 |
|
621 |
/**
|
622 |
* Creates a vectorial cache that is used to save and retrieve data.
|
623 |
* @param name the cache name.
|
624 |
* @param parameters parameters to create the stores used to save data.
|
625 |
* @throws DataException
|
626 |
*/
|
627 |
public void createCache(String name, DynObject parameters) throws DataException; |
628 |
|
629 |
|
630 |
/**
|
631 |
* @return the vectorial cache
|
632 |
*/
|
633 |
public FeatureCache getCache();
|
634 |
|
635 |
/**
|
636 |
* Return if the provider knows the real envelope of a layer. If not,
|
637 |
* the {@link FeatureStoreProvider#getEnvelope()} method doesn't return
|
638 |
* the full envelope.
|
639 |
*
|
640 |
* @return
|
641 |
* <true> if it knows the real envelope.
|
642 |
*/
|
643 |
public boolean isKnownEnvelope(); |
644 |
|
645 |
/**
|
646 |
* Return if the maximum number of features provided by the
|
647 |
* provider are limited.
|
648 |
*
|
649 |
* @return
|
650 |
* <true> if there is a limit of features.
|
651 |
*/
|
652 |
public boolean hasRetrievedFeaturesLimit(); |
653 |
|
654 |
/**
|
655 |
* If the {@link FeatureStoreProvider#hasRetrievedFeaturesLimit()} returns true,
|
656 |
* it returns the limit of features retrieved from the provider.
|
657 |
* @return
|
658 |
* The limit of the retrieved features.
|
659 |
*/
|
660 |
public int getRetrievedFeaturesLimit(); |
661 |
} |
662 |
|