svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.api / src / main / java / org / gvsig / fmap / dal / feature / FeatureStore.java @ 40435
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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.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.lang.Cloneable; |
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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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/**
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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, Cloneable { |
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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, |
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NewFeatureStoreParameters params) 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) 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)
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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,
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FeatureType featureType) 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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* Save changes in the provider without leaving the edit mode.
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* Do not call observers to communicate a change of ediding mode.
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* The operation's history is eliminated to prevent inconsistencies
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* in the data.
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*
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* @throws DataException
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*/
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public void commitChanges() throws DataException ; |
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/**
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*
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* Returns true if you can call CommitChanges method.
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* If not in editing or changes have been made in the structure
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* return false.
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*
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* @return true if can call commitChanges
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* @throws DataException
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*/
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public boolean canCommitChanges() 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
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* 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
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* 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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/**
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* Applies the validation rules associated to the given mode to the active
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* {@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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/**
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* Creates an index which will be applied to the features of the given type,
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* by using the data of the given attribute.
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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 {@link FeatureIndex}
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*
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*
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* @throws FeatureIndexException
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* if there is an error creating the index
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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 an index which will be applied to the features of the given type,
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* by using the data of the given attribute.
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*
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* @param indexTypeName
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* the type of the index to be created. That name is
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* related to one of the registered index providers
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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 {@link FeatureIndex}
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*
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*
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* @throws FeatureIndexException
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* if there is an error creating the index
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*/
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public FeatureIndex createIndex(String indexTypeName, |
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FeatureType featureType, String attributeName, String indexName) |
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throws DataException;
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|
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/**
|
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* Creates an index which will be applied to the features of the given type,
|
554 |
* by using the data of the given attribute. This method will return without
|
555 |
* waiting for the index to be filled, as that will be performed in
|
556 |
* background. An optional {@link Observer} parameter is provided to be
|
557 |
* notified ( {@link FeatureStoreNotification#INDEX_FILLING_SUCCESS} )
|
558 |
* when the index has finished filling with data and is available to be
|
559 |
* used.
|
560 |
*
|
561 |
* @param featureType
|
562 |
* The FeatureType to which the indexed attribute belongs.
|
563 |
*
|
564 |
* @param attributeName
|
565 |
* The name of the attributed to be indexed
|
566 |
*
|
567 |
* @param indexName
|
568 |
* The index name
|
569 |
*
|
570 |
* @param observer
|
571 |
* to notify to when the created index has finished filling
|
572 |
* with data and is available to be used. The observer will
|
573 |
* receive then a
|
574 |
* {@link FeatureStoreNotification#INDEX_FILLING_SUCCESS}
|
575 |
* notification, with the index object if it has finished
|
576 |
* successfully, or a
|
577 |
* {@link FeatureStoreNotification#INDEX_FILLING_ERROR}
|
578 |
* notification with the exception object if there has been
|
579 |
* any error in the process. Optional.
|
580 |
*
|
581 |
* @return the resulting {@link FeatureIndex}
|
582 |
*
|
583 |
* @see FeatureStoreNotification#INDEX_FILLING_STARTED
|
584 |
* @see FeatureStoreNotification#INDEX_FILLING_SUCCESS
|
585 |
* @see FeatureStoreNotification#INDEX_FILLING_CANCELLED
|
586 |
* @see FeatureStoreNotification#INDEX_FILLING_ERROR
|
587 |
*
|
588 |
* @throws FeatureIndexException
|
589 |
* if there is an error creating the index
|
590 |
*/
|
591 |
public FeatureIndex createIndex(FeatureType featureType,
|
592 |
String attributeName, String indexName, Observer observer) |
593 |
throws DataException;
|
594 |
|
595 |
/**
|
596 |
* Creates an index which will be applied to the features of the given type,
|
597 |
* by using the data of the given attribute. This method will return without
|
598 |
* waiting for the index to be filled, as that will be performed in
|
599 |
* background. An optional {@link Observer} parameter is provided to be
|
600 |
* notified ( {@link FeatureStoreNotification#INDEX_FILLING_SUCCESS} )
|
601 |
* when the index has finished filling with data and is available to be
|
602 |
* used.
|
603 |
*
|
604 |
* @param indexTypeName
|
605 |
* the type of the index to be created. That name is
|
606 |
* related to one of the registered index providers
|
607 |
* @param featureType
|
608 |
* The FeatureType to which the indexed attribute belongs.
|
609 |
*
|
610 |
* @param attributeName
|
611 |
* The name of the attributed to be indexed
|
612 |
*
|
613 |
* @param indexName
|
614 |
* The index name
|
615 |
*
|
616 |
* @param observer
|
617 |
* to notify to when the created index has finished filling
|
618 |
* with data and is available to be used. The observer will
|
619 |
* receive then a
|
620 |
* {@link FeatureStoreNotification#INDEX_FILLING_SUCCESS}
|
621 |
* notification, with the index object if it has finished
|
622 |
* successfully, or a
|
623 |
* {@link FeatureStoreNotification#INDEX_FILLING_ERROR}
|
624 |
* notification with the exception object if there has been
|
625 |
* any error in the process. Optional.
|
626 |
*
|
627 |
* @return the resulting {@link FeatureIndex}
|
628 |
*
|
629 |
* @see FeatureStoreNotification#INDEX_FILLING_STARTED
|
630 |
* @see FeatureStoreNotification#INDEX_FILLING_SUCCESS
|
631 |
* @see FeatureStoreNotification#INDEX_FILLING_CANCELLED
|
632 |
* @see FeatureStoreNotification#INDEX_FILLING_ERROR
|
633 |
*
|
634 |
* @throws FeatureIndexException
|
635 |
* if there is an error creating the index
|
636 |
*/
|
637 |
public FeatureIndex createIndex(String indexTypeName, |
638 |
FeatureType featureType, String attributeName, String indexName, |
639 |
Observer observer) throws DataException; |
640 |
|
641 |
/**
|
642 |
* Returns a FeatureIndexes structure containing all available indexes in
|
643 |
* the store.
|
644 |
*
|
645 |
* @return
|
646 |
*/
|
647 |
public FeatureIndexes getIndexes();
|
648 |
|
649 |
/*
|
650 |
* =============================================================
|
651 |
*
|
652 |
* Selection related services
|
653 |
*/
|
654 |
|
655 |
/**
|
656 |
* Sets the selection to the passed {@link FeatureSet}
|
657 |
*
|
658 |
* @param selection
|
659 |
* A {@link FeatureSet} with the requested selection
|
660 |
*/
|
661 |
public void setSelection(FeatureSet selection) throws DataException; |
662 |
|
663 |
/**
|
664 |
* Creates a {@link FeatureSelection}
|
665 |
*
|
666 |
* @return
|
667 |
* a {@link FeatureSelection}
|
668 |
*
|
669 |
* @throws DataException
|
670 |
*/
|
671 |
public FeatureSelection createFeatureSelection() throws DataException; |
672 |
|
673 |
/**
|
674 |
* Returns the current {@link FeatureSelection}.
|
675 |
* Create a empty selection if not exits.
|
676 |
*
|
677 |
* @return
|
678 |
* current {@link FeatureSelection}.
|
679 |
*
|
680 |
* @throws DataException
|
681 |
*/
|
682 |
public FeatureSelection getFeatureSelection() throws DataException; |
683 |
|
684 |
/*
|
685 |
* =============================================================
|
686 |
*
|
687 |
* Lock related services
|
688 |
*/
|
689 |
|
690 |
/**
|
691 |
* Indicates whether this store supports locks.
|
692 |
*
|
693 |
* @return
|
694 |
* true if this store supports locks, false if not.
|
695 |
*/
|
696 |
public boolean isLocksSupported(); |
697 |
|
698 |
/**
|
699 |
* Returns the set of locked features
|
700 |
*
|
701 |
* @return
|
702 |
* set of locked features
|
703 |
*
|
704 |
* @throws DataException
|
705 |
*/
|
706 |
public FeatureLocks getLocks() throws DataException; |
707 |
|
708 |
/*
|
709 |
* =============================================================
|
710 |
* Transforms related services
|
711 |
* =============================================================
|
712 |
*/
|
713 |
|
714 |
/**
|
715 |
* Returns this store transforms
|
716 |
*
|
717 |
* @return
|
718 |
* this store transforms
|
719 |
*/
|
720 |
public FeatureStoreTransforms getTransforms();
|
721 |
|
722 |
/**
|
723 |
* Returns a new {@link FeatureQuery} associated to this store.
|
724 |
*
|
725 |
* @return
|
726 |
* a new {@link FeatureQuery} associated to this store.
|
727 |
*/
|
728 |
public FeatureQuery createFeatureQuery();
|
729 |
|
730 |
/**
|
731 |
* Returns featue count of this store.
|
732 |
*
|
733 |
* @return
|
734 |
* @throws DataException
|
735 |
*/
|
736 |
public long getFeatureCount() throws DataException; |
737 |
|
738 |
/**
|
739 |
* Creates a vectorial cache that is used to save and retrieve data.
|
740 |
*
|
741 |
* @param name
|
742 |
* the cache name.
|
743 |
* @param parameters
|
744 |
* parameters to create the stores used to save data.
|
745 |
* @throws DataException
|
746 |
*/
|
747 |
public void createCache(String name, DynObject parameters) |
748 |
throws DataException;
|
749 |
|
750 |
/**
|
751 |
* @return the vectorial cache
|
752 |
*/
|
753 |
public FeatureCache getCache();
|
754 |
|
755 |
/**
|
756 |
* Return if the provider knows the real envelope of a layer. If not,
|
757 |
* the {@link FeatureStoreProvider#getEnvelope()} method doesn't return
|
758 |
* the full envelope.
|
759 |
*
|
760 |
* @return
|
761 |
* <true> if it knows the real envelope.
|
762 |
*/
|
763 |
public boolean isKnownEnvelope(); |
764 |
|
765 |
/**
|
766 |
* Return if the maximum number of features provided by the
|
767 |
* provider are limited.
|
768 |
*
|
769 |
* @return
|
770 |
* <true> if there is a limit of features.
|
771 |
*/
|
772 |
public boolean hasRetrievedFeaturesLimit(); |
773 |
|
774 |
/**
|
775 |
* If the {@link FeatureStoreProvider#hasRetrievedFeaturesLimit()} returns
|
776 |
* true,
|
777 |
* it returns the limit of features retrieved from the provider.
|
778 |
*
|
779 |
* @return
|
780 |
* The limit of the retrieved features.
|
781 |
*/
|
782 |
public int getRetrievedFeaturesLimit(); |
783 |
} |