source:
trunk/workshop-routing-foss4g/web/OpenLayers/lib/OpenLayers/Protocol/SQL.js
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[76] | 1 | /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for |
2 | * full list of contributors). Published under the Clear BSD license. | |
3 | * See http://svn.openlayers.org/trunk/openlayers/license.txt for the | |
4 | * full text of the license. */ | |
5 | ||
6 | /** | |
7 | * @requires OpenLayers/Protocol.js | |
8 | */ | |
9 | ||
10 | /** | |
11 | * Class: OpenLayers.Protocol.SQL | |
12 | * Abstract SQL protocol class. Not to be instantiated directly. Use | |
13 | * one of the SQL protocol subclasses instead. | |
14 | * | |
15 | * Inherits from: | |
16 | * - <OpenLayers.Protocol> | |
17 | */ | |
18 | OpenLayers.Protocol.SQL = OpenLayers.Class(OpenLayers.Protocol, { | |
19 | ||
20 | /** | |
21 | * APIProperty: databaseName | |
22 | * {String} | |
23 | */ | |
24 | databaseName: 'ol', | |
25 | ||
26 | /** | |
27 | * APIProperty: tableName | |
28 | * Name of the database table into which Features should be saved. | |
29 | */ | |
30 | tableName: "ol_vector_features", | |
31 | ||
32 | /** | |
33 | * Property: postReadFiltering | |
34 | * {Boolean} Whether the filter (if there's one) must be applied after | |
35 | * the features have been read from the database; for example the | |
36 | * BBOX strategy passes the read method a BBOX spatial filter, if | |
37 | * postReadFiltering is true every feature read from the database | |
38 | * will go through the BBOX spatial filter, which can be costly; | |
39 | * defaults to true. | |
40 | */ | |
41 | postReadFiltering: true, | |
42 | ||
43 | /** | |
44 | * Constructor: OpenLayers.Protocol.SQL | |
45 | */ | |
46 | initialize: function(options) { | |
47 | OpenLayers.Protocol.prototype.initialize.apply(this, [options]); | |
48 | }, | |
49 | ||
50 | /** | |
51 | * APIMethod: destroy | |
52 | * Clean up the protocol. | |
53 | */ | |
54 | destroy: function() { | |
55 | OpenLayers.Protocol.prototype.destroy.apply(this); | |
56 | }, | |
57 | ||
58 | /** | |
59 | * APIMethod: supported | |
60 | * This should be overridden by specific subclasses | |
61 | * | |
62 | * Returns: | |
63 | * {Boolean} Whether or not the browser supports the SQL backend | |
64 | */ | |
65 | supported: function() { | |
66 | return false; | |
67 | }, | |
68 | ||
69 | /** | |
70 | * Method: evaluateFilter | |
71 | * If postReadFiltering is true evaluate the filter against the feature | |
72 | * and return the result of the evaluation, otherwise return true. | |
73 | * | |
74 | * Parameters: | |
75 | * {<OpenLayers.Feature.Vector>} The feature. | |
76 | * {<OpenLayers.Filter>} The filter. | |
77 | * | |
78 | * Returns: | |
79 | * {Boolean} true if postReadFiltering if false, the result of the | |
80 | * filter evaluation otherwise. | |
81 | */ | |
82 | evaluateFilter: function(feature, filter) { | |
83 | return filter && this.postReadFiltering ? | |
84 | filter.evaluate(feature) : true; | |
85 | }, | |
86 | ||
87 | CLASS_NAME: "OpenLayers.Protocol.SQL" | |
88 | }); |
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