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revision 1.1 by joko, Wed Mar 5 12:04:37 2003 UTC revision 1.23 by joko, Tue Mar 11 04:15:01 2003 UTC
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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 1.23  2003/03/11 04:15:01  joko
28     * + fixed metadata for phpDocumentor
29     *
30     * Revision 1.22  2003/03/11 04:03:54  joko
31     * + fixed metadata for phpDocumentor
32     *
33     * Revision 1.21  2003/03/11 03:23:36  joko
34     * + fixed metadata for phpDocumentor
35     *
36     * Revision 1.20  2003/03/11 03:17:37  joko
37     * + fixed metadata for phpDocumentor
38     *
39     * Revision 1.19  2003/03/11 03:05:01  joko
40     * + fixed metadata for phpDocumentor
41     *
42     * Revision 1.18  2003/03/11 02:42:51  joko
43     * + fixed metadata for phpDocumentor
44     *
45     * Revision 1.17  2003/03/11 02:34:55  joko
46     * + fixed metadata for phpDocumentor
47     *
48     * Revision 1.16  2003/03/11 02:28:12  joko
49     * + fixed metadata for phpDocumentor
50     *
51     * Revision 1.15  2003/03/11 02:23:03  joko
52     * + fixed metadata for phpDocumentor
53     *
54     * Revision 1.14  2003/03/11 02:14:24  joko
55     * + fixed metadata for phpDocumentor
56     *
57     * Revision 1.13  2003/03/11 02:04:37  joko
58     * + fixed metadata for phpDocumentor
59     *
60     * Revision 1.12  2003/03/11 01:10:00  joko
61     * + fixed metadata for phpDocumentor
62     *
63     * Revision 1.11  2003/03/11 00:12:49  joko
64     * + fixed metadata for phpDocumentor
65     *
66     * Revision 1.10  2003/03/10 23:25:03  joko
67     * + fixed metadata for phpDocumentor
68     *
69     * Revision 1.9  2003/03/10 22:31:55  joko
70     * + fixed metadata for phpDocumentor
71     *
72     * Revision 1.8  2003/03/09 15:50:36  joko
73     * + additional metadata for Autodia
74     *
75     * Revision 1.7  2003/03/05 17:13:16  joko
76     * updated docu (phpDocumentor testing....)
77     *
78     * Revision 1.6  2003/03/05 16:10:08  joko
79     * updated docu (phpDocumentor testing....)
80     *
81     * Revision 1.5  2003/03/05 15:40:39  joko
82     * updated docu (phpDocumentor testing....)
83     *
84     * Revision 1.4  2003/03/05 15:26:23  joko
85     * updated docu (phpDocumentor testing....)
86     *
87     * Revision 1.3  2003/03/05 15:21:54  joko
88     * updated docu (phpDocumentor testing....)
89     *
90     * Revision 1.2  2003/03/05 15:01:10  joko
91     * updated docu
92     *
93   * Revision 1.1  2003/03/05 12:04:37  joko   * Revision 1.1  2003/03/05 12:04:37  joko
94   * + initial commit   * + initial commit
95     * </pre>
96   *   *
97   *   *
98   */   */
99    
100  /**  /**
101   * --- @description   * It helps DataSource::Generic working in different "operation modes".
  *  
  * --- It helps GenericDataSource working in different "operation modes".  
102   *   *
103   *    o Pass-Through-Reference: php Object will get passed through all layers   * <b>Modes:</b> (these are proposals, more or less...)
104   *    o Pass-Through-Memory: reference to a memory area will get used   * o Pass-Through-Reference: php Object will get passed through all layers
105   *    x Build-Locator: build locator from datasource-type and adapter-type   * o Pass-Through-Memory: reference to a memory area will get used
106   *    o Use-Locator: directly use DataSource::Locator instance passed in   * + Build-Locator: build locator from datasource-type and adapter-type
107   *    o Merge-Locators: merge metadata of two or more DataSource::Locator instances   * o Use-Locator: directly use DataSource::Locator instance passed in
108   *    o Build-AutoLocator: use global constants making up our metadata   * o Merge-Locators: merge metadata of two or more DataSource::Locator instances
109   *   * o Build-AutoLocator: use global constants making up our metadata
110   *   *
111   * --- It can/should contain (flexible, just some parameters are required for each operation mode)   * <b>It can/should contain:</b>
112   *   * (flexible, just some parameters are required for each operation mode)
113   *    o an oldschool "dsn"-string (e.g. for rdbms-connection via PEAR)   * o an oldschool "dsn"-string (e.g. for rdbms-connection via PEAR)
114   *    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
115   *       (e.g. DataSource::Proxy::XMLRPC via DesignPattern::RemoteProxy)   *   (e.g. DataSource::Proxy::XMLRPC via DesignPattern::RemoteProxy)
116   *    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')
117   *    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')
118   *       this will get propagated (pass-through-mode)   *   this will get propagated (pass-through-mode)
119   *    x a datasource-type (of 'rpc|mysql|csv-file|xml-file')   * o a datasource-type (of 'rpc|mysql|csv-file|xml-file')
120   *        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*
121   *        by the GenericDataSource at runtime   *   by the DataSource::Generic at runtime
122   *    x an adapter-type (of 'phpHtmlLib|pear')   * + (x) an adapter-type (of 'phpHtmlLib|pear')
123   *        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*
124   *        by the GenericDataSource at runtime   *   by the DataSource::Generic at runtime
125   *    o names of global constants where to find these informations   * o names of global constants where to find these informations
126   *    o datasource-type ('rpc|csv-file|...') <-> datasource-family ('orm|rdbms|odbms')   * o datasource-type ('rpc|csv-file|...') <-> datasource-family ('orm|rdbms|odbms')
127   *   *
128   *   * <b>It can do:</b>
129   * --- It can do   * - builds a larger locator from a minimum of information passed in via constructor-arguments
130   *    x builds a larger locator from a minimum of information passed in via constructor-arguments   * - direct fallback mode to some predefined constant names if locator is empty and above method fails
131   *    o direct fallback mode to some predefined constant names if locator is empty and above method fails   * - direct fallback mode to some predefined values if just *everything* fails
  *    o direct fallback mode to some predefined values if just *everything* fails  
132   *   *
133   *   * <b>How to use?</b>
  * --- How to use?  
134   *   *
135   * Pass an array holding "locator metadata" to the constructor.   * Pass an array holding "locator metadata" to the constructor.
136   * This module takes care of the rest.   * This module takes care of the rest.
  *  
137   * Pass an array to the constructor: (e.g.)   * Pass an array to the constructor: (e.g.)
138   *   *
139   *  1. for doing rpc-calls....   * <code>
140     *    // 1. for doing rpc-calls....
141   *    $locator = array(   *    $locator = array(
142   *      datasource_type => 'rpc',   *      datasource_type =&gt; 'rpc',
143   *      [adapter_type => 'phpHtmlLib',]   *      [adapter_type => 'phpHtmlLib',]
144   *      metadata => array( Host => 'localhost', Port => '8765' ),   *      metadata => array( Host => 'localhost', Port => '8765' ),
145   *    );   *    );
146   *    $source = new GenericDataSource($locator);   *    $source = ne w DataSource::Generic($locator);
147   *    $this->set_data_source( &$source );   *    $this->set_data_source( &$source );
148   *   * </code>
149   *  2. [proposal] for common/oldschool datahandles....   * <code>
150     *    // 2. [proposal] for common/oldschool datahandles....
151   *    $locator = array(   *    $locator = array(
152   *      dsn => 'known dsn markup',   *      dsn => 'known dsn markup',
153   *    );   *    );
154   *    $source = new GenericDataSource($locator);   *    $source = ne w DataSource::Generic($locator);
155   *    $this->set_data_source( &$source );   *    $this->set_data_source( &$source );
156     * </code>
157   *   *
158   *   *
159   *   *
160   * @author Andreas Motl <andreas.motl@ilo.de>   * @author Andreas Motl <andreas.motl@ilo.de>
161     * @link http://www.netfrag.org/~joko/
162   * @copyright (c) 2003 - All Rights reserved.   * @copyright (c) 2003 - All Rights reserved.
  * @license GNU LGPL (GNU Lesser General Public License)  
163   *   *
164   * @author-url http://www.netfrag.org/~joko/   * @license GNU LGPL (GNU Lesser General Public License)
165   * @license-url http://www.gnu.org/licenses/lgpl.txt   * @link http://www.gnu.org/licenses/lgpl.txt
166   *   *
  * @author Andreas Motl <andreas.motl@ilo.de>  
167   * @package org.netfrag.glib   * @package org.netfrag.glib
168   * @module DataSource::Locator   * @subpackage DataSource
169     * @name DataSource::Locator
170   *   *
171   */   */
   
   
172  class DataSource_Locator {  class DataSource_Locator {
173    
174    /**    /**
175      * This var holds the locator metadata hash      * This var holds the locator metadata hash,
176        *
177      * which is built from some predefined rules      * which is built from some predefined rules
178      * using metadata from $_options and some      * using metadata from $_options and some
179      * other presets.      * other presets.
180      *      *
181      * See '_buildLocator' which acts as a dispatcher      * See {@link build}, which acts as a dispatcher
182      * depending on $_options[datasource].      * depending on $_options[datasource]. <br>
183      * (main dispatching level)      * (main dispatching level)
184      *      *
185      * The structure of a full blown locator looks like this:      * <br>
186      *      *
187        * The structure of a full blown locator looks like this:
188        * <code>
189      *  $locator = array(      *  $locator = array(
190      *    type => '<your type specifying the datasource-type>',      *    type => '<your type specifying the datasource-type>',
191      *    metadata => array(      *    metadata => array(
# Line 124  class DataSource_Locator { Line 193  class DataSource_Locator {
193      *    ),      *    ),
194      *    [dsn => '<your dsn markup>'],      *    [dsn => '<your dsn markup>'],
195      *  );      *  );
196        * </code>
197      *      *
198      * 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:
199        * <code>
200      *  $locator = array(      *  $locator = array(
201      *    dsn => 'mysql://username:password@localhost/database',      *    dsn => 'mysql://username:password@localhost/database',
202      *  );      *  );
203        * </code>
204      *      *
205      * 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):
206        * <code>
207      *  $locator = array(      *  $locator = array(
208      *    type => 'rpc',      *    type => 'rpc',
209      *    metadata => array(      *    metadata => array(
# Line 139  class DataSource_Locator { Line 212  class DataSource_Locator {
212      *      Port => '8765',      *      Port => '8765',
213      *    )      *    )
214      *  );      *  );
215        * </code>
216        *
217        * @deprecated
218      *      *
219      */      */
220            var $_locator_metadata = NULL;
     //var $_locator_metadata = NULL;  
221    
222    
223          /**     /**
224           * This var holds the arguments passed in to the constructor.      * This var holds the arguments passed in to the constructor.
225           * We will try to build full blown locator metadata information from that.      * We will try to build full blown locator metadata information from that.
226           *      *
227           */      * @deprecated
228          //var $_in = NULL;      *
229        */
230        var $_in = NULL;
231    
232          /**     /**
233           * This var holds the locator metadata informations inside      * This var holds the locator metadata informations inside
234           * a single hash. This is returned from '->get()'.      * a single hash. This is returned from '->get()'.
235           *      *
236           */      * @deprecated
237          //var $_out = NULL;      *
238        */
239        var $_out = NULL;
240    
241    
242          /**          /**
# Line 171  class DataSource_Locator { Line 250  class DataSource_Locator {
250      // name of an Adapter module      // name of an Adapter module
251      var $_adapter_type;      var $_adapter_type;
252            
253      // additional information required (passed on to the Proxy by GenericDataSource)      // additional information required (passed on to the Proxy by DataSource::Generic)
254      var $_metadata = array();      var $_metadata = array();
255            
256      //var $_dsn;      //var $_dsn;
# Line 181  class DataSource_Locator { Line 260  class DataSource_Locator {
260           * The constructor is used to pass in the           * The constructor is used to pass in the
261           * locator metadata hash.           * locator metadata hash.
262           *           *
263           * @param LocatorMetadataHash array - layout: array( type => '', metadata => '', dsn => '' )           * @param object(DataSource::Locator)|hash optional: a &$locator instance
          * @param Query array - layout: array( type => '', metadata => '', dsn => '' )  
264           */           */
265          function DataSource_Locator() {          function DataSource_Locator() {
266        $args_multi = func_get_args();        $args_multi = func_get_args();
# Line 258  class DataSource_Locator { Line 336  class DataSource_Locator {
336                    
337          /**          /**
338       * Set the locator metadata hash we will feed *partly*       * Set the locator metadata hash we will feed *partly*
339       * to an encapsulated Data::Driver::Proxy instance.       * to an encapsulated Data::Driver::Proxy instance
340       *       *
341       * @param LocatorMetadataHash array -       * @param LocatorMetadataHash array -
342       *       *
# Line 285  class DataSource_Locator { Line 363  class DataSource_Locator {
363          $metadata = array(          $metadata = array(
364            //package => 'Data::Driver::Proxy',            //package => 'Data::Driver::Proxy',
365            //package => 'DataSource::Proxy::XMLRPC',            //package => 'DataSource::Proxy::XMLRPC',
366            //package => 'DataSource::GenericDataSource',            //package => 'DataSource::Generic',
367            //package => 'DesignPattern::RemoteProxy',            //package => 'DesignPattern::RemoteProxy',
368            Host => RPC_HOSTNAME,            Host => RPC_HOSTNAME,
369            Port => RPC_PORT,            Port => RPC_PORT,
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