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revision 1.1 by joko, Wed Mar 5 12:04:37 2003 UTC revision 1.18 by joko, Tue Mar 11 02:42:51 2003 UTC
# Line 1  Line 1 
1  <?php  <?php
2  /**  /**
  * --- @about  
  *  
3   * This file contains the DataSource::Locator class.   * This file contains the DataSource::Locator class.
4     *
5   * It acts as a container for DataSource connection   * It acts as a container for DataSource connection
6   * metadata. Think of it as an enhanced dsn.   * metadata. Think of it as an enhanced dsn.
7   *   *
8   * It gets used by DataSource::GenericDataSource   * It gets used by DataSource::Generic
9   * to be informed about the most important stuff it   * to be informed about the most important stuff it
10   * has to do.   * has to do.
11   *   *
  *  
12   * @author Andreas Motl <andreas.motl@ilo.de>   * @author Andreas Motl <andreas.motl@ilo.de>
13   * @package org.netfrag.glib   * @package org.netfrag.glib
14   * @module DataSource::Locator   * @name DataSource::Locator
15     *
16   *   *
17   */   */
18    
19    
20  /**  /**
21     * <b>Cvs-Log:</b>
22     *
23     * <pre>
24   * $Id$   * $Id$
25   *   *
26   * $Log$   * $Log$
27     * Revision 1.18  2003/03/11 02:42:51  joko
28     * + fixed metadata for phpDocumentor
29     *
30     * Revision 1.17  2003/03/11 02:34:55  joko
31     * + fixed metadata for phpDocumentor
32     *
33     * Revision 1.16  2003/03/11 02:28:12  joko
34     * + fixed metadata for phpDocumentor
35     *
36     * Revision 1.15  2003/03/11 02:23:03  joko
37     * + fixed metadata for phpDocumentor
38     *
39     * Revision 1.14  2003/03/11 02:14:24  joko
40     * + fixed metadata for phpDocumentor
41     *
42     * Revision 1.13  2003/03/11 02:04:37  joko
43     * + fixed metadata for phpDocumentor
44     *
45     * Revision 1.12  2003/03/11 01:10:00  joko
46     * + fixed metadata for phpDocumentor
47     *
48     * Revision 1.11  2003/03/11 00:12:49  joko
49     * + fixed metadata for phpDocumentor
50     *
51     * Revision 1.10  2003/03/10 23:25:03  joko
52     * + fixed metadata for phpDocumentor
53     *
54     * Revision 1.9  2003/03/10 22:31:55  joko
55     * + fixed metadata for phpDocumentor
56     *
57     * Revision 1.8  2003/03/09 15:50:36  joko
58     * + additional metadata for Autodia
59     *
60     * Revision 1.7  2003/03/05 17:13:16  joko
61     * updated docu (phpDocumentor testing....)
62     *
63     * Revision 1.6  2003/03/05 16:10:08  joko
64     * updated docu (phpDocumentor testing....)
65     *
66     * Revision 1.5  2003/03/05 15:40:39  joko
67     * updated docu (phpDocumentor testing....)
68     *
69     * Revision 1.4  2003/03/05 15:26:23  joko
70     * updated docu (phpDocumentor testing....)
71     *
72     * Revision 1.3  2003/03/05 15:21:54  joko
73     * updated docu (phpDocumentor testing....)
74     *
75     * Revision 1.2  2003/03/05 15:01:10  joko
76     * updated docu
77     *
78   * Revision 1.1  2003/03/05 12:04:37  joko   * Revision 1.1  2003/03/05 12:04:37  joko
79   * + initial commit   * + initial commit
80     * </pre>
81   *   *
82   *   *
83   */   */
84    
85  /**  /**
86   * --- @description   * It helps DataSource::Generic working in different "operation modes".
  *  
  * --- It helps GenericDataSource working in different "operation modes".  
87   *   *
88   *    o Pass-Through-Reference: php Object will get passed through all layers   * <p>
89   *    o Pass-Through-Memory: reference to a memory area will get used   * <b>Modes:</b> (these are proposals, more or less...)
90   *    x Build-Locator: build locator from datasource-type and adapter-type   * o Pass-Through-Reference: php Object will get passed through all layers
91   *    o Use-Locator: directly use DataSource::Locator instance passed in   * o Pass-Through-Memory: reference to a memory area will get used
92   *    o Merge-Locators: merge metadata of two or more DataSource::Locator instances   * + Build-Locator: build locator from datasource-type and adapter-type
93   *    o Build-AutoLocator: use global constants making up our metadata   * o Use-Locator: directly use DataSource::Locator instance passed in
94   *   * o Merge-Locators: merge metadata of two or more DataSource::Locator instances
95   *   * o Build-AutoLocator: use global constants making up our metadata
96   * --- It can/should contain (flexible, just some parameters are required for each operation mode)   * </p>
97   *   *
98   *    o an oldschool "dsn"-string (e.g. for rdbms-connection via PEAR)   * <b>It can/should contain:</b>
99   *    x name of a Proxy module to use to *wrap/hide* the connection/transport-layer   * (flexible, just some parameters are required for each operation mode)
100   *       (e.g. DataSource::Proxy::XMLRPC via DesignPattern::RemoteProxy)   * o an oldschool "dsn"-string (e.g. for rdbms-connection via PEAR)
101   *    x metadata (a hash) directly describing *where* to connect to (e.g. 'Host', 'Port')   * + (x) name of a Proxy module to use to *wrap/hide* the connection/transport-layer
102   *    o an instance of an already instantiated arbitrary datasource handler (e.g. 'source')   *   (e.g. DataSource::Proxy::XMLRPC via DesignPattern::RemoteProxy)
103   *       this will get propagated (pass-through-mode)   * + (x) metadata (a hash) directly describing *where* to connect to (e.g. 'Host', 'Port')
104   *    x a datasource-type (of 'rpc|mysql|csv-file|xml-file')   * o an instance of an already instantiated arbitrary datasource handler (e.g. 'source')
105   *        this will be mapped to a module name and used as a *Proxy*   *   this will get propagated (pass-through-mode)
106   *        by the GenericDataSource at runtime   * o a datasource-type (of 'rpc|mysql|csv-file|xml-file')
107   *    x an adapter-type (of 'phpHtmlLib|pear')   *   this will be mapped to a module name and used as a *Proxy*
108   *        this will be mapped to a module name and used as an *Adapter*   *   by the DataSource::Generic at runtime
109   *        by the GenericDataSource at runtime   * + (x) an adapter-type (of 'phpHtmlLib|pear')
110   *    o names of global constants where to find these informations   *   this will be mapped to a module name and used as an *Adapter*
111   *    o datasource-type ('rpc|csv-file|...') <-> datasource-family ('orm|rdbms|odbms')   *   by the DataSource::Generic at runtime
112   *   * o names of global constants where to find these informations
113   *   * o datasource-type ('rpc|csv-file|...') <-> datasource-family ('orm|rdbms|odbms')
114   * --- It can do   *
115   *    x builds a larger locator from a minimum of information passed in via constructor-arguments   * <b>It can do:</b>
116   *    o direct fallback mode to some predefined constant names if locator is empty and above method fails   * - builds a larger locator from a minimum of information passed in via constructor-arguments
117   *    o direct fallback mode to some predefined values if just *everything* fails   * - direct fallback mode to some predefined constant names if locator is empty and above method fails
118     * - direct fallback mode to some predefined values if just *everything* fails
119   *   *
120   *   * <b>How to use?</b>
  * --- How to use?  
121   *   *
122   * Pass an array holding "locator metadata" to the constructor.   * Pass an array holding "locator metadata" to the constructor.
123   * This module takes care of the rest.   * This module takes care of the rest.
  *  
124   * Pass an array to the constructor: (e.g.)   * Pass an array to the constructor: (e.g.)
125   *   *
126     * <pre>
127   *  1. for doing rpc-calls....   *  1. for doing rpc-calls....
128     *    <code>
129   *    $locator = array(   *    $locator = array(
130   *      datasource_type => 'rpc',   *      datasource_type => 'rpc',
131   *      [adapter_type => 'phpHtmlLib',]   *      [adapter_type => 'phpHtmlLib',]
132   *      metadata => array( Host => 'localhost', Port => '8765' ),   *      metadata => array( Host => 'localhost', Port => '8765' ),
133   *    );   *    );
134   *    $source = new GenericDataSource($locator);   *    $source = ne w DataSource::Generic($locator);
135   *    $this->set_data_source( &$source );   *    $this->set_data_source( &$source );
136     *    </code>
137   *   *
138   *  2. [proposal] for common/oldschool datahandles....   *  2. [proposal] for common/oldschool datahandles....
139     *    <code>
140   *    $locator = array(   *    $locator = array(
141   *      dsn => 'known dsn markup',   *      dsn => 'known dsn markup',
142   *    );   *    );
143   *    $source = new GenericDataSource($locator);   *    $source = ne w DataSource::Generic($locator);
144   *    $this->set_data_source( &$source );   *    $this->set_data_source( &$source );
145     *    </code>
146     * </pre>
147   *   *
148   *   *
149   *   *
150   * @author Andreas Motl <andreas.motl@ilo.de>   * @author Andreas Motl <andreas.motl@ilo.de>
151     * @link http://www.netfrag.org/~joko/
152   * @copyright (c) 2003 - All Rights reserved.   * @copyright (c) 2003 - All Rights reserved.
  * @license GNU LGPL (GNU Lesser General Public License)  
153   *   *
154   * @author-url http://www.netfrag.org/~joko/   * @license GNU LGPL (GNU Lesser General Public License)
155   * @license-url http://www.gnu.org/licenses/lgpl.txt   * @link http://www.gnu.org/licenses/lgpl.txt
156   *   *
  * @author Andreas Motl <andreas.motl@ilo.de>  
157   * @package org.netfrag.glib   * @package org.netfrag.glib
158   * @module DataSource::Locator   * @subpackage DataSource
159     * @name DataSource::Locator
160   *   *
161   */   */
   
   
162  class DataSource_Locator {  class DataSource_Locator {
163    
164    /**    /**
165      * This var holds the locator metadata hash      * This var holds the locator metadata hash,
166        *
167      * which is built from some predefined rules      * which is built from some predefined rules
168      * using metadata from $_options and some      * using metadata from $_options and some
169      * other presets.      * other presets.
170      *      *
171      * See '_buildLocator' which acts as a dispatcher      * {@see build}, which acts as a dispatcher
172      * depending on $_options[datasource].      * depending on $_options[datasource]. (main dispatching level)
173      * (main dispatching level)      *
174        * <p>
175      *      *
176      * The structure of a full blown locator looks like this:      * The structure of a full blown locator looks like this:
177      *      *
178        * <code>
179      *  $locator = array(      *  $locator = array(
180      *    type => '<your type specifying the datasource-type>',      *    type => '<your type specifying the datasource-type>',
181      *    metadata => array(      *    metadata => array(
# Line 124  class DataSource_Locator { Line 183  class DataSource_Locator {
183      *    ),      *    ),
184      *    [dsn => '<your dsn markup>'],      *    [dsn => '<your dsn markup>'],
185      *  );      *  );
186        * </code>
187      *      *
188      * Example 1 - data is inside a rdbms, using a dsn to connect to it:      * Example 1 - data is inside a rdbms, using a dsn to connect to it:
189        * <code>
190      *  $locator = array(      *  $locator = array(
191      *    dsn => 'mysql://username:password@localhost/database',      *    dsn => 'mysql://username:password@localhost/database',
192      *  );      *  );
193        * </code>
194      *      *
195      * Example 2 - data is inside an odbms, reachable by doing remote procedure calls (rpc):      * Example 2 - data is inside an odbms, reachable by doing remote procedure calls (rpc):
196        * <code>
197      *  $locator = array(      *  $locator = array(
198      *    type => 'rpc',      *    type => 'rpc',
199      *    metadata => array(      *    metadata => array(
# Line 139  class DataSource_Locator { Line 202  class DataSource_Locator {
202      *      Port => '8765',      *      Port => '8765',
203      *    )      *    )
204      *  );      *  );
205        * </code>
206        *
207        * </p>
208        *
209        * @deprecated
210      *      *
211      */      */
212            var $_locator_metadata = NULL;
     //var $_locator_metadata = NULL;  
213    
214    
215          /**     /**
216           * This var holds the arguments passed in to the constructor.      * This var holds the arguments passed in to the constructor.
217           * We will try to build full blown locator metadata information from that.      * We will try to build full blown locator metadata information from that.
218           *      *
219           */      * @deprecated
220          //var $_in = NULL;      *
221        */
222        var $_in = NULL;
223    
224          /**     /**
225           * This var holds the locator metadata informations inside      * This var holds the locator metadata informations inside
226           * a single hash. This is returned from '->get()'.      * a single hash. This is returned from '->get()'.
227           *      *
228           */      * @deprecated
229          //var $_out = NULL;      *
230        */
231        var $_out = NULL;
232    
233    
234          /**          /**
# Line 171  class DataSource_Locator { Line 242  class DataSource_Locator {
242      // name of an Adapter module      // name of an Adapter module
243      var $_adapter_type;      var $_adapter_type;
244            
245      // additional information required (passed on to the Proxy by GenericDataSource)      // additional information required (passed on to the Proxy by DataSource::Generic)
246      var $_metadata = array();      var $_metadata = array();
247            
248      //var $_dsn;      //var $_dsn;
# Line 181  class DataSource_Locator { Line 252  class DataSource_Locator {
252           * The constructor is used to pass in the           * The constructor is used to pass in the
253           * locator metadata hash.           * locator metadata hash.
254           *           *
255           * @param LocatorMetadataHash array - layout: array( type => '', metadata => '', dsn => '' )           * @param object(DataSource::Locator)|hash optional: a &$locator instance
          * @param Query array - layout: array( type => '', metadata => '', dsn => '' )  
256           */           */
257          function DataSource_Locator() {          function DataSource_Locator() {
258        $args_multi = func_get_args();        $args_multi = func_get_args();
# Line 258  class DataSource_Locator { Line 328  class DataSource_Locator {
328                    
329          /**          /**
330       * Set the locator metadata hash we will feed *partly*       * Set the locator metadata hash we will feed *partly*
331       * to an encapsulated Data::Driver::Proxy instance.       * to an encapsulated Data::Driver::Proxy instance
332       *       *
333       * @param LocatorMetadataHash array -       * @param LocatorMetadataHash array -
334       *       *
# Line 285  class DataSource_Locator { Line 355  class DataSource_Locator {
355          $metadata = array(          $metadata = array(
356            //package => 'Data::Driver::Proxy',            //package => 'Data::Driver::Proxy',
357            //package => 'DataSource::Proxy::XMLRPC',            //package => 'DataSource::Proxy::XMLRPC',
358            //package => 'DataSource::GenericDataSource',            //package => 'DataSource::Generic',
359            //package => 'DesignPattern::RemoteProxy',            //package => 'DesignPattern::RemoteProxy',
360            Host => RPC_HOSTNAME,            Host => RPC_HOSTNAME,
361            Port => RPC_PORT,            Port => RPC_PORT,
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