Source Code Cross Referenced for InternalStore.java in  » GIS » GeoTools-2.4.1 » org » geotools » caching » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » GeoTools 2.4.1 » org.geotools.caching 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         *    GeoTools - OpenSource mapping toolkit
03:         *    http://geotools.org
04:         *    (C) 2002-2006, GeoTools Project Managment Committee (PMC)
05:         *
06:         *    This library is free software; you can redistribute it and/or
07:         *    modify it under the terms of the GNU Lesser General Public
08:         *    License as published by the Free Software Foundation;
09:         *    version 2.1 of the License.
10:         *
11:         *    This library is distributed in the hope that it will be useful,
12:         *    but WITHOUT ANY WARRANTY; without even the implied warranty of
13:         *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14:         *    Lesser General Public License for more details.
15:         */
16:        package org.geotools.caching;
17:
18:        import org.geotools.feature.Feature;
19:
20:        import java.util.Collection;
21:
22:        /** This is the interface for the FeatureIndex backend,
23:         * when FeatureIndex uses non-clustered index (ie data and data index are separate).
24:         *
25:         *  It offers a generic contract,
26:         *  in order to allow different implementation
27:         *  on how the data is actually stored
28:         *  (eg. in memory, in another DataStore, on disk, in a database).
29:         *
30:         * @author Christophe Rousson, SoC 2007, CRG-ULAVAL
31:         *
32:         */
33:        public interface InternalStore {
34:            /** Test if a feature is already in the store.
35:             *
36:             * @param feature a feature
37:             * @return true if this feature is already stored.
38:             */
39:            public abstract boolean contains(Feature feature);
40:
41:            /** Test if a feature is already in the store.
42:             *
43:             * @param featureId the Id of a feature
44:             * @return true if this feature is already stored.
45:             */
46:            public abstract boolean contains(String featureId);
47:
48:            /** Store a feature.
49:             *
50:             * @param f a feature
51:             */
52:            public abstract void put(Feature f);
53:
54:            /** Returns the feature identified by id.
55:             *
56:             * @param featureId the id of the feature to return.
57:             * @return the feature, or null if the feature does not exist in store.
58:             *
59:             * @task should we not return null ?
60:             * what to return if feature does not existe in store ?
61:             */
62:            public abstract Feature get(String featureId);
63:
64:            /** Returns all the features in the store as a Collection.
65:             *
66:             * @return all the features in the store
67:             *
68:             * @task should we rather return a FeatureCollection ?
69:             */
70:            public abstract Collection getAll();
71:
72:            /** Empties the store.
73:             *
74:             */
75:            public abstract void clear();
76:
77:            /** Removes the feature identified by id.
78:             *
79:             * @param featureId the id of the feature to remove from store.
80:             *
81:             */
82:            public abstract void remove(String featureId);
83:        }
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