/[cvs]/nfo/php/libs/org.netfrag.glib/DataSource/Locator.php
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revision 1.9 by joko, Mon Mar 10 22:31:55 2003 UTC revision 1.25 by joko, Tue Mar 11 16:28:25 2003 UTC
# Line 14  Line 14 
14   * @name DataSource::Locator   * @name DataSource::Locator
15   *   *
16   *   *
17     */
18    
19    
20    /**
21   * <b>Cvs-Log:</b>   * <b>Cvs-Log:</b>
22   *   *
23   * <pre>   * <pre>
24   * $Id$   * $Id$
25   *   *
26   * $Log$   * $Log$
27     * Revision 1.25  2003/03/11 16:28:25  joko
28     * + fixed metadata for phpDocumentor
29     *
30     * Revision 1.24  2003/03/11 04:49:25  joko
31     * + fixed metadata for phpDocumentor
32     *
33     * Revision 1.23  2003/03/11 04:15:01  joko
34     * + fixed metadata for phpDocumentor
35     *
36     * Revision 1.22  2003/03/11 04:03:54  joko
37     * + fixed metadata for phpDocumentor
38     *
39     * Revision 1.21  2003/03/11 03:23:36  joko
40     * + fixed metadata for phpDocumentor
41     *
42     * Revision 1.20  2003/03/11 03:17:37  joko
43     * + fixed metadata for phpDocumentor
44     *
45     * Revision 1.19  2003/03/11 03:05:01  joko
46     * + fixed metadata for phpDocumentor
47     *
48     * Revision 1.18  2003/03/11 02:42:51  joko
49     * + fixed metadata for phpDocumentor
50     *
51     * Revision 1.17  2003/03/11 02:34:55  joko
52     * + fixed metadata for phpDocumentor
53     *
54     * Revision 1.16  2003/03/11 02:28:12  joko
55     * + fixed metadata for phpDocumentor
56     *
57     * Revision 1.15  2003/03/11 02:23:03  joko
58     * + fixed metadata for phpDocumentor
59     *
60     * Revision 1.14  2003/03/11 02:14:24  joko
61     * + fixed metadata for phpDocumentor
62     *
63     * Revision 1.13  2003/03/11 02:04:37  joko
64     * + fixed metadata for phpDocumentor
65     *
66     * Revision 1.12  2003/03/11 01:10:00  joko
67     * + fixed metadata for phpDocumentor
68     *
69     * Revision 1.11  2003/03/11 00:12:49  joko
70     * + fixed metadata for phpDocumentor
71     *
72     * Revision 1.10  2003/03/10 23:25:03  joko
73     * + fixed metadata for phpDocumentor
74     *
75   * Revision 1.9  2003/03/10 22:31:55  joko   * Revision 1.9  2003/03/10 22:31:55  joko
76   * + fixed metadata for phpDocumentor   * + fixed metadata for phpDocumentor
77   *   *
# Line 54  Line 106 
106  /**  /**
107   * It helps DataSource::Generic working in different "operation modes".   * It helps DataSource::Generic working in different "operation modes".
108   *   *
109   * <ul>   * <b>Modes:</b> (these are proposals, more or less...)
110   * o Pass-Through-Reference: php Object will get passed through all layers   * o Pass-Through-Reference: php Object will get passed through all layers
111   * o Pass-Through-Memory: reference to a memory area will get used   * o Pass-Through-Memory: reference to a memory area will get used
112   * x Build-Locator: build locator from datasource-type and adapter-type   * + Build-Locator: build locator from datasource-type and adapter-type
113   * o Use-Locator: directly use DataSource::Locator instance passed in   * o Use-Locator: directly use DataSource::Locator instance passed in
114   * o Merge-Locators: merge metadata of two or more DataSource::Locator instances   * o Merge-Locators: merge metadata of two or more DataSource::Locator instances
115   * o Build-AutoLocator: use global constants making up our metadata   * o Build-AutoLocator: use global constants making up our metadata
  * </ul>  
  *  
116   *   *
117   * <b>It can/should contain:</b>   * <b>It can/should contain:</b>
118   * (flexible, just some parameters are required for each operation mode)   * (flexible, just some parameters are required for each operation mode)
  * <ul>  
119   * o an oldschool "dsn"-string (e.g. for rdbms-connection via PEAR)   * o an oldschool "dsn"-string (e.g. for rdbms-connection via PEAR)
120   * x name of a Proxy module to use to *wrap/hide* the connection/transport-layer   * + (x) name of a Proxy module to use to *wrap/hide* the connection/transport-layer
121   *   (e.g. DataSource::Proxy::XMLRPC via DesignPattern::RemoteProxy)   *   (e.g. DataSource::Proxy::XMLRPC via DesignPattern::RemoteProxy)
122   * x metadata (a hash) directly describing *where* to connect to (e.g. 'Host', 'Port')   * + (x) metadata (a hash) directly describing *where* to connect to (e.g. 'Host', 'Port')
123   * o an instance of an already instantiated arbitrary datasource handler (e.g. 'source')   * o an instance of an already instantiated arbitrary datasource handler (e.g. 'source')
124   *   this will get propagated (pass-through-mode)   *   this will get propagated (pass-through-mode)
125   * o a datasource-type (of 'rpc|mysql|csv-file|xml-file')   * o a datasource-type (of 'rpc|mysql|csv-file|xml-file')
126   *   this will be mapped to a module name and used as a *Proxy*   *   this will be mapped to a module name and used as a *Proxy*
127   *   by the DataSource::Generic at runtime   *   by the DataSource::Generic at runtime
128   * x an adapter-type (of 'phpHtmlLib|pear')   * + (x) an adapter-type (of 'phpHtmlLib|pear')
129   *   this will be mapped to a module name and used as an *Adapter*   *   this will be mapped to a module name and used as an *Adapter*
130   *   by the DataSource::Generic at runtime   *   by the DataSource::Generic at runtime
131   * o names of global constants where to find these informations   * o names of global constants where to find these informations
132   * o datasource-type ('rpc|csv-file|...') <-> datasource-family ('orm|rdbms|odbms')   * o datasource-type ('rpc|csv-file|...') <-> datasource-family ('orm|rdbms|odbms')
  * </ul>  
  *  
  *  
  * <b>It can do</b>  
  * <ul>  
  * # builds a larger locator from a minimum of information passed in via constructor-arguments  
  * o direct fallback mode to some predefined constant names if locator is empty and above method fails  
  * o direct fallback mode to some predefined values if just *everything* fails  
  * </ul>  
133   *   *
134     * <b>It can do:</b>
135     * - builds a larger locator from a minimum of information passed in via constructor-arguments
136     * - direct fallback mode to some predefined constant names if locator is empty and above method fails
137     * - direct fallback mode to some predefined values if just *everything* fails
138   *   *
139   * <b>How to use?</b>   * <b>How to use?</b>
140   *   *
141   * Pass an array holding "locator metadata" to the constructor.   * Pass an array holding "locator metadata" to the constructor.
142   * This module takes care of the rest.   * This module takes care of the rest.
  *  
143   * Pass an array to the constructor: (e.g.)   * Pass an array to the constructor: (e.g.)
144   *   *
145   *  1. for doing rpc-calls....   * <code>
146   *    <code>   * <?php
147     *    // 1. for doing rpc-calls....
148   *    $locator = array(   *    $locator = array(
149   *      datasource_type => 'rpc',   *      datasource_type =&gt;&gt; 'rpc',
150   *      [adapter_type => 'phpHtmlLib',]   *      [adapter_type => 'phpHtmlLib',]
151   *      metadata => array( Host => 'localhost', Port => '8765' ),   *      metadata => array( Host => 'localhost', Port => '8765' ),
152   *    );   *    );
153   *    $source = ne w DataSource::Generic($locator);   *    $source = ne w DataSource::Generic($locator);
154   *    $this->set_data_source( &$source );   *    $this->set_data_source( &$source );
155   *    </code>   * ?>
156   *   * </code>
157   *  2. [proposal] for common/oldschool datahandles....   * <code>
158   *    <code>   * <?php
159     *    // 2. [proposal] for common/oldschool datahandles....
160   *    $locator = array(   *    $locator = array(
161   *      dsn => 'known dsn markup',   *      dsn => 'known dsn markup',
162   *    );   *    );
163   *    $source = ne w DataSource::Generic($locator);   *    $source = ne w DataSource::Generic($locator);
164   *    $this->set_data_source( &$source );   *    $this->set_data_source( &$source );
165   *    </code>   * ?>
166     * </code>
167   *   *
168   *   *
169   *   *
# Line 136  Line 182 
182  class DataSource_Locator {  class DataSource_Locator {
183    
184    /**    /**
185      * This var holds the locator metadata hash      * This var holds the locator metadata hash,
186        *
187      * which is built from some predefined rules      * which is built from some predefined rules
188      * using metadata from $_options and some      * using metadata from $_options and some
189      * other presets.      * other presets.
190      *      *
191      * @see function build, which acts as a dispatcher      * See {@link build}, which acts as a dispatcher
192      * depending on $_options[datasource].      * depending on $_options[datasource]. <br>
193      * (main dispatching level)      * (main dispatching level)
194      *      *
195      * The structure of a full blown locator looks like this:      * <br>
196      *      *
197        * The structure of a full blown locator looks like this:
198      * <code>      * <code>
199      *  $locator = array(      *  $locator = array(
200      *    type => '<your type specifying the datasource-type>',      *    type => '<your type specifying the datasource-type>',
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