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<?php |
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/** |
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* This file contains the GenericDataSource child class |
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* |
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* @author Andreas Motl <andreas.motl@ilo.de> |
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* @package org.netfrag.glib |
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* @name DataSource::Generic |
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* |
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*/ |
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|
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/** |
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* $Id: Generic.php,v 1.4 2003/03/10 23:25:03 joko Exp $ |
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* |
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* $Log: Generic.php,v $ |
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* Revision 1.4 2003/03/10 23:25:03 joko |
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* + fixed metadata for phpDocumentor |
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* |
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* Revision 1.3 2003/03/09 15:50:36 joko |
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* + additional metadata for Autodia |
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* |
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* Revision 1.2 2003/03/05 17:28:43 joko |
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* updated docu (phpDocumentor testing....) |
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* |
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* Revision 1.1 2003/03/05 12:04:00 joko |
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* + initial commit, from GenericDataSource |
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* |
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* Revision 1.3 2003/03/03 21:24:18 joko |
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* now based on DesignPattern::RemoteProxy |
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* |
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* Revision 1.2 2003/03/02 01:05:13 joko |
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* - purged old code |
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* |
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* Revision 1.1 2003/03/01 21:47:15 joko |
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* renamed from AbstractDataSource.inc |
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* |
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* Revision 1.1 2003/03/01 20:17:15 joko |
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* renamed from GenericDataSource.inc |
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* replaced '_proxy' through '_handler' to better associate the ability to act as a generic dispatcher handler |
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* |
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* Revision 1.3 2003/03/01 15:36:11 joko |
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* + debugging |
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* + renamed some methods regarding new proposal (build_handler_options, fetch_result, etc.) |
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* |
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* Revision 1.2 2003/03/01 04:50:27 joko |
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* encapsulated all output into tracing mode |
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* disabled tracing |
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* |
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* Revision 1.1 2003/03/01 03:10:40 joko |
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* + initial commit |
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* |
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* |
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*/ |
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|
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/** |
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* This requires the MemoryDataSource base class |
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* |
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*/ |
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|
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// V1: compile-time-include, stable since years ;-) |
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//include_once($phphtmllib."/widgets/data_source/MemoryDataSource.inc"); |
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|
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// V2: runtime-load proposal, more flexible |
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// loadModule('MemoryDataSource', 'inc'); // doesn't work (would do if basepath of module is in libpath) |
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// loadModule($phphtmllib . '::widgets::data_source::MemoryDataSource', 'inc'); // works (by accident) |
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// loadModule($phphtmllib . "/widgets/data_source/MemoryDataSource", "inc"); // works (should be stable) |
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// loadModule($phphtmllib . "/widgets/data_source/MemoryDataSource.inc", null); // works (should be stable) |
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|
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|
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|
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/** |
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* Have to have PEAR and DB included |
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* the pear dir must be in the |
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* include path. |
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*/ |
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// require_once("PEAR.php"); // FIXME: what about PEAR::XML::RPC? |
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// require_once("DB.php"); |
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|
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|
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loadModule('DesignPattern::Proxy'); |
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loadModule('DesignPattern::TransparentProxy'); |
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loadModule('DesignPattern::RemoteProxy'); |
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|
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//class GenericDataSource extends MemoryDataSource { |
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//class GenericDataSource extends DesignPattern_Proxy { |
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//class GenericDataSource extends DesignPattern_RemoteProxy { |
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//class GenericDataSource extends DesignPattern_TransparentProxy { |
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|
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//class GenericDataSource extends MemoryDataSource { |
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//loadModule("DataSource::Proxy::Memory"); |
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//class GenericDataSource extends DataSource_Proxy_Memory { |
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//class DataSource_GenericDataSource extends DataSource_Proxy_Memory { |
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//class DataSource_GenericDataSource extends DesignPattern_Proxy { |
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//class DataSource_GenericDataSource extends DataSource_Proxy_Memory { |
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|
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// now independent!!! new class-inheritance-tree possible now! |
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// solved by having an Adapter *and* a Proxy here! |
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//class GenericDataSource { |
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|
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loadModule('DesignPattern::AdapterProxy'); |
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|
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|
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|
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/** |
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* This GenericDataSource child class is *completely* independent |
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* of a specific storage implementation and intended to be a wrapper |
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* class on the way from phpHtmlLib to Xyz. <br> |
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* ("Yyz" gets represented by Data::Storage by now.....) |
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* |
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* GenericDataSource interacts with an intermediate "proxy" object |
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* (e.g. Data::Driver::Proxy) when doing queries. <br> |
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* <pre> |
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* Don't mix this up with a persistent database handle which gets |
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* reused each and every time for different queries. |
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* Here *is* a new instance of Data::Driver::Proxy for *each* query. |
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* </pre> |
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* |
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* But the point is: Caching! The actual *data* isn't read redundant! |
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* |
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* <pre> |
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* --- snipped into here from above --- |
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* that may use arbitrary code modules as database handlers. |
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* It's aims are to get together: |
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* o phpHtmlLibs "source-handlers" |
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* o PEAR's database handlers |
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* o custom ones (e.g. Data::Driver::Proxy object, which talks to a remote rpc server) |
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* --- snipped into here from above --- |
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* </pre> |
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* |
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* |
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* !!!!!! refactor this to Data::Driver::Proxy !!!!!! <----------------- |
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* |
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* Data::Driver::Proxy instantiates "handlers" below itself |
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* which act as encapsulated workers to actually do the stuff to do. |
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* It can cache data for "disconnected mode" using the |
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* php PEAR DB abstraction objects. |
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* One worker already implemented is Data::Driver::RPC::Remote, which |
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* talks to a RPC::XML server (todo: talk SOAP!) using PEAR::XML::RPC. |
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* |
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* <pre> |
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* --- refactored here, but: redundant somehow --- |
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* Data::Driver::Proxy uses a PEAR XML::RPC object to actually |
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* talk HTTP and serialize data chunks to and from XML, |
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* but adds some caching to this "process of fetching data from a remote side". |
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* It "proxies" arbitrary data chunks a) inside a native php4 session, |
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* b) by talking to a rdbms (single proxy-table) or c) [TODO] using PEAR::Cache. |
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* --- refactored here, but: redundant somehow --- |
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* </pre> |
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* |
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* !!!!!! refactor this to Data::Driver::Proxy !!!!!! <----------------- |
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* |
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* |
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* <b>How to use?</b> |
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* |
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* Pass an array holding "locator metadata" to the constructor. |
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* GenericDataSource takes care of the rest. |
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* |
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* Pass an array to the constructor: (e.g.) |
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* |
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* 1. doing rpc-calls.... |
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* <code> |
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* $locator = array( |
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* type => 'rpc', |
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* metadata => array( Host => 'localhost', Port => '8765' ), |
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* ); |
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* $source = ne w GenericDataSource($locator); |
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* $this->set_data_source( &$source ); |
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* </code> |
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* |
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* 2. [proposal] common datahandles.... |
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* <code> |
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* $locator = array( |
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* type => 'mysql', |
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* dsn => 'known dsn markup', |
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* ); |
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* $source = ne w GenericDataSource($locator); |
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* $this->set_data_source( &$source ); |
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* </code> |
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* |
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* @link http://www.netfrag.org/~joko/ |
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* @author Andreas Motl <andreas.motl@ilo.de> |
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* |
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* @link http://www.netfrag.org/~jonen/ |
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* @author Sebastian Utz <seut@tunemedia.de> |
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* |
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* @copyright (c) 2003 - All Rights reserved. |
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* |
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* @link http://www.gnu.org/licenses/lgpl.txt |
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* @license GNU LGPL (GNU Lesser General Public License) |
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* |
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* |
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* @package org.netfrag.glib |
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* @subpackage DataSource |
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* @name DataSource::Generic |
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* |
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* @todo this: |
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* |
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* o mungle this to be able to be wrapped around phpHtmlLib's own storage-handles |
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* o implement another Data::Driver::Proxy container |
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* |
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* <pre> |
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* !!!!!!!! THIS IS THE PROBLEM !!!!!!!! |
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* !!!!!!!! here is it where we have to break inheritance again !!!!!!!! |
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* |
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* THE CONFLICT: Beeing in phpHtmlLib *and* DesignPattern::TransparentProxy |
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* inheritance trees at the same time, which is *not* possible at |
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* declare-time. We *do* need some runtime-infrastructure to solve this! |
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* |
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* TODO: move build- and check-locator stuff from ObjectList to this place!!! |
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* |
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* ABOUT: |
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* 1. otherwhere: WebApp - scope: |
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* x handles page vs. block vs. widget; dispatches MVC-View |
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* 2. here: DataSource - scope: |
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* x handles bridge to frameworks (e.g. phpHtmlLib) vs. actual data driver libs (PEAR, etc.)) |
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* o clean implementation using a DesignPattern::AdapterProxy |
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* </pre> |
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* |
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* |
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*/ |
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class DataSource_Generic extends DesignPattern_AdapterProxy { |
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|
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// !!!!!!!! here is it where we have to break inheritance again !!!!!!!! |
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// !!!!!!!! THIS IS THE PROBLEM !!!!!!!! |
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|
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|
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|
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/** |
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* This var holds the locator metadata hash |
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* that is used to feed metadata to a per-query-instance |
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* of an Adapter object. |
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* |
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*/ |
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//var $_locator = NULL; |
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|
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/** |
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* This var holds the locator metadata hash |
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* which is built from some predefined rules |
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* using metadata from $_options and some |
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* other presets. |
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* |
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* See '_buildLocator' which acts as a dispatcher |
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* depending on $_options[datasource]. |
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* (main dispatching level) |
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* |
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* The structure of a full blown locator looks like this: |
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* |
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* $locator = array( |
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* type => '<your type specifying the datasource-type>', |
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* metadata => array( |
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* ... your arbitrary deep metadata structure ... |
251 |
* ), |
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* [dsn => '<your dsn markup>'], |
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* ); |
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* |
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* Example 1 - data is inside a rdbms, using a dsn to connect to it: |
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* $locator = array( |
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* type => 'sql', |
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* dsn => 'mysql://username:password@localhost/database', |
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* ); |
260 |
* |
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* Example 2 - data is inside an odbms, reachable by doing remote procedure calls (rpc): |
262 |
* $locator = array( |
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* type => 'rpc', |
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* metadata => array( |
265 |
* package => 'Data::Driver::Proxy', |
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* Host => 'localhost', |
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* Port => '8765', |
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* ) |
269 |
* ); |
270 |
* |
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*/ |
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var $_locator = NULL; |
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|
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|
275 |
/** |
276 |
* This var holds the module information required to |
277 |
* create instances of a Proxy and an Adapter. |
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* Information might get extracted from a |
279 |
* DataSource::Locator instance. |
280 |
* |
281 |
* --- A skeleton: |
282 |
* |
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* $this->_modules = array( |
284 |
* _proxy => array( _id => '', _module => '', _options = array(), _instance => &$obj), |
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* _adapter => array( _id => '', _module => '', _options = array(), _instance => &$obj), |
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* ); |
287 |
* |
288 |
* |
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* --- An example: |
290 |
* |
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* $this->_modules = array( |
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* _proxy => array( _id => 'rpc', _module => 'DesignPattern::RemoteProxy', _instance => &$obj), |
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* _adapter => array( _id => 'phpHtmlLib', _module => 'DataSource::Adapter::phpHtmlLib::DataListSource', _instance => &$obj), |
294 |
* ); |
295 |
* |
296 |
* |
297 |
*/ |
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//var $_modules = NULL; |
299 |
|
300 |
|
301 |
/** |
302 |
* This var holds the query hash |
303 |
* that is used to feed as query to a per-query-instance |
304 |
* of a Data::Driver::Proxy object. |
305 |
* |
306 |
*/ |
307 |
var $_query = NULL; |
308 |
|
309 |
|
310 |
/** |
311 |
* this holds the query result from the |
312 |
* Data::Driver::Proxy->queryXyz() call |
313 |
* |
314 |
*/ |
315 |
var $_result = NULL; |
316 |
|
317 |
|
318 |
|
319 |
/** |
320 |
* The constructor is used to pass in the |
321 |
* locator metadata hash. |
322 |
* |
323 |
* @param LocatorMetadataHash array - layout: array( type => '', metadata => '', dsn => '' ) |
324 |
* @param Query array - layout: array( type => '', metadata => '', dsn => '' ) |
325 |
*/ |
326 |
|
327 |
|
328 |
function DataSource_Generic( &$locator, $query ) { |
329 |
|
330 |
// copy parameter from query to locator |
331 |
//$this->_locator->merge_to($this->_locator, array( datasource_type => $query[datasource] ), '_'); |
332 |
//$this->_locator->_datasource_type = $query[datasource]; |
333 |
//$locator[_datasource_type] = $query[datasource]; |
334 |
|
335 |
/** |
336 |
* <!-- Autodia --> |
337 |
* can do: (this is metadata supplied for Autodia, don't delete!) |
338 |
* $this->_locator = new DataSource_Locator() |
339 |
* |
340 |
*/ |
341 |
|
342 |
// build master locator |
343 |
$this->_locator = php::mkComponent('DataSource::Locator', $locator, array( datasource_type => $query[datasource] ) ); |
344 |
//exit; |
345 |
//$this->_locator = php::mkComponent('DataSource::Locator'); |
346 |
|
347 |
$this->_locator->check(); |
348 |
|
349 |
// trace |
350 |
//print "locator-obj: " . Dumper($this->_locator); |
351 |
//print "locator-data: " . Dumper($locator_data); |
352 |
//exit; |
353 |
|
354 |
|
355 |
|
356 |
/* |
357 |
$this->_modules = array( |
358 |
_proxy => array( _id => $locator->_datasource_type ), |
359 |
_adapter => array( _id => $locator->_adapter_type ), |
360 |
); |
361 |
*/ |
362 |
|
363 |
//$this->set_locator( $locator ); |
364 |
$this->set_query( $query ); |
365 |
|
366 |
|
367 |
|
368 |
/* |
369 |
// V1: |
370 |
// pre-flight: establish and check locator metadata |
371 |
$this->_buildLocator(); |
372 |
$this->_checkLocator(); |
373 |
*/ |
374 |
|
375 |
|
376 |
|
377 |
// pre-flight: check locator metadata |
378 |
//$locator->build(); |
379 |
if (!$this->_locator->check()) { |
380 |
user_error("locator-check failed."); |
381 |
exit; |
382 |
//return; |
383 |
} |
384 |
|
385 |
//exit; |
386 |
|
387 |
|
388 |
/** |
389 |
* <!-- Autodia --> |
390 |
* can do: (this is metadata supplied for Autodia, don't delete!) |
391 |
* $proxy = new DesignPattern_RemoteProxy() |
392 |
* |
393 |
*/ |
394 |
|
395 |
|
396 |
// --- Proxy selector/dispatcher ... |
397 |
|
398 |
switch ($this->_locator->_datasource_type) { |
399 |
case 'rpc': |
400 |
//$locator_data = $this->_locator->get_metadata(); |
401 |
//$this->_modules[_proxy][_options] = array( locator => $this->_locator, query => $query ); |
402 |
//$this->_modules[_proxy][_module] = 'DataSource::Proxy::XMLRPC'; |
403 |
|
404 |
//$this->_modules[_proxy][_module] = 'DesignPattern::RemoteProxy'; |
405 |
//$this->_modules[_proxy][_options] = $locator_data; |
406 |
|
407 |
//$this->set_component_name('DesignPattern::RemoteProxy'); |
408 |
//$this->set_component_options($locator_data); |
409 |
|
410 |
$this->set_component_name('DesignPattern::RemoteProxy'); |
411 |
|
412 |
break; |
413 |
default: |
414 |
user_error("Site::GenericPage: no Proxy could be selected!"); |
415 |
break; |
416 |
} |
417 |
|
418 |
|
419 |
|
420 |
/* |
421 |
// V1: |
422 |
// make up dummy args by now |
423 |
$args = array( |
424 |
adapter => 'phpHtmlLib', |
425 |
); |
426 |
*/ |
427 |
|
428 |
// V2: now propagated from caller! |
429 |
|
430 |
//print Dumper(array( locator => $locator, query => $query )); |
431 |
//exit; |
432 |
|
433 |
//$this->create_adapter($this->module, $this->function, $this->arguments); |
434 |
//$this->set_handler( $this->get_adapter() ); |
435 |
|
436 |
|
437 |
// --- Adapter selector/dispatcher ... |
438 |
// ... resolves this._modules.adapter._id to this._modules.adapter._module |
439 |
|
440 |
switch ($locator->_adapter_type) { |
441 |
case 'phpHtmlLib': |
442 |
//$adapter_arguments = $args[title]; |
443 |
|
444 |
$this->set_adapter_module('DataSource::Adapter::phpHtmlLib::DataListSource'); |
445 |
|
446 |
// in order to let the Adapter communicate with the Proxy, |
447 |
// instantiate a wrapper method in a third namespace via |
448 |
// Exporter::export_symbol(from, to) |
449 |
$this->set_adapter_options($this); |
450 |
|
451 |
|
452 |
break; |
453 |
default: |
454 |
user_error("DataSource::GenericDataSource: no Adapter could be selected!"); |
455 |
break; |
456 |
} |
457 |
|
458 |
|
459 |
|
460 |
// --- module instantiation - Proxy and Adapter |
461 |
|
462 |
//user_error("handle proxy here!"); |
463 |
//$this->create_proxy(); |
464 |
|
465 |
//print Dumper($this); |
466 |
|
467 |
//print "this: " . Dumper($this); |
468 |
|
469 |
// V1: |
470 |
/* |
471 |
$proxy = php::mkComponent($this->_modules[_proxy][_module], $this->_modules[_proxy][_options]); |
472 |
print "proxy: " . Dumper($proxy); |
473 |
//exit; |
474 |
*/ |
475 |
|
476 |
// V2: |
477 |
/* |
478 |
$resultHandle = mkObject('DesignPattern::RemoteProxy', $cache_key, array( key => 1, command => $command, query => $query, remote => 1, rpcinfo => $rpcinfo, cache => array( db => 0, session => 1 ) ) ); |
479 |
$result = $resultHandle->getAttributes(); |
480 |
return $result; |
481 |
*/ |
482 |
|
483 |
// V3: |
484 |
// $this->set_handler( $proxy ); |
485 |
|
486 |
// V4: use _component_name & _component_options (proposal from GenericPage) |
487 |
// $this->_component_name = ... |
488 |
// $this->create_handler(); |
489 |
|
490 |
|
491 |
/** |
492 |
* <!-- Autodia --> |
493 |
* can do: (this is metadata supplied for Autodia, don't delete!) |
494 |
* $adapter = new DataSource_Adapter_phpHtmlLib_DataListSource() |
495 |
* |
496 |
*/ |
497 |
|
498 |
// V1: |
499 |
//$this->create_adapter($adapter_module, $this->function, $this->arguments); |
500 |
|
501 |
// V2: FIXME - better use V1? |
502 |
$adapter = php::mkComponent($this->get_adapter_module(), $this->get_adapter_options()); |
503 |
$this->set_adapter($adapter); |
504 |
|
505 |
|
506 |
|
507 |
|
508 |
} |
509 |
|
510 |
function make_adapter_transparent() { |
511 |
|
512 |
// ... known from Site::Adapter::php::Class: |
513 |
|
514 |
// At this place the Adapter becomes a Proxy. |
515 |
// This functionality currently correlates to the |
516 |
// name of our ancestor, DesignPattern::AdapterProxy. |
517 |
// FIXME: move this code to its namespace!!! |
518 |
// FIXME: rename to set_proxy... |
519 |
|
520 |
// The reason this has to occour here is required |
521 |
// by the TransparentProxy to actually make the |
522 |
// _handler (_proxy) transparent later.... |
523 |
//$this->set_proxy( $this->get_adapter() ); |
524 |
} |
525 |
|
526 |
/** |
527 |
* Set the metadata information |
528 |
* (a DataSource::Locator) we will use |
529 |
* to build encapsulated instances |
530 |
* of both a Proxy and an Adapter. |
531 |
* |
532 |
* @param LocatorMetadataHash array - |
533 |
* |
534 |
*/ |
535 |
function set_metadata( &$locator ) { |
536 |
$this->_locator = &$locator; |
537 |
} |
538 |
|
539 |
function &get_metadata() { |
540 |
return $this->_locator; |
541 |
} |
542 |
|
543 |
|
544 |
/** |
545 |
* Set the query metadata hash we will feed *completely* |
546 |
* to an encapsulated Proxy instance. |
547 |
* |
548 |
* @param QueryDeclaration array - |
549 |
* |
550 |
*/ |
551 |
function set_query( $query ) { |
552 |
$this->_query = $query; |
553 |
} |
554 |
|
555 |
/** |
556 |
* Issue remote/proxy call |
557 |
* Stolen from Application_AbstractBackend::_remote_method (RefactoringProposal?) |
558 |
* Tweaked a bit: proxy package now taken from $this->_handler_name |
559 |
* |
560 |
* Create a new instance of a proxy and store it for later reuse. |
561 |
* Read the locator metadata hash and create |
562 |
* the proxy handler instance using passed-in name. |
563 |
* |
564 |
* @param string - $proxy_name (namespaced classname - perl syntax - e.g.: Data::Driver::Proxy) |
565 |
* |
566 |
*/ |
567 |
function datasource_handler_call() { |
568 |
|
569 |
|
570 |
// 1. read args and build cache key |
571 |
|
572 |
$arg_list = func_get_args(); |
573 |
$command = array_shift($arg_list); |
574 |
$cache_key = join("-", array(session_id(), $command, join('_', $arg_list) )); |
575 |
//print "cache_key: $cache_key<br>"; |
576 |
|
577 |
// FIXME: what if arg_list still contains more elements after doing this? |
578 |
$query = array_shift($arg_list); |
579 |
|
580 |
// 2. prepare proxy-options (read from locator) |
581 |
|
582 |
//print "this: " . Dumper($this); |
583 |
//exit; |
584 |
|
585 |
// read from locator metadata |
586 |
//$proxy_name = $this->_locator[metadata][package]; |
587 |
|
588 |
// V1: |
589 |
//$rpcinfo = array( Host => $this->_locator[metadata][Host], Port => $this->_locator[metadata][Port] ); |
590 |
|
591 |
// V2: |
592 |
$rpcinfo = $this->_locator->get_metadata(); |
593 |
|
594 |
// FIXME! implement this into Data::Driver::RPC::Remote! |
595 |
//$rpcinfo[to_latin] = 1; |
596 |
|
597 |
// FIXME! patch query |
598 |
if (sizeof($query) == 1) { |
599 |
$query = $query[0]; |
600 |
} |
601 |
|
602 |
//print "query: " . Dumper($query); |
603 |
|
604 |
// !!! use DesignPattern::Proxy here !!! |
605 |
// $proxy = new DesignPattern_Proxy($proxy_name, ...) |
606 |
// or: |
607 |
// $proxy = mkObject('DesignPattern::Proxy'); |
608 |
// $this->set_handler( $proxy ); |
609 |
// or: |
610 |
// $proxy = mkObject('DesignPattern::Proxy'); |
611 |
// $proxy-> |
612 |
// $this->set_handler( $proxy ); |
613 |
|
614 |
|
615 |
|
616 |
//$this->set_component_name( $proxy_name ); |
617 |
$this->set_component_options( $cache_key, array( key => 1, command => $command, query => $query, remote => 1, rpcinfo => $rpcinfo, cache => array( db => 0, session => 1 ) ) ); |
618 |
//print Dumper($this); |
619 |
//exit; |
620 |
|
621 |
$this->create_proxy(); |
622 |
|
623 |
//print Dumper($this); |
624 |
//exit; |
625 |
|
626 |
/* |
627 |
// -------------------- clone this & modify ---------- |
628 |
$proxy = mkObject($proxy_name, $cache_key, array( key => 1, command => $command, query => $query, remote => 1, rpcinfo => $rpcinfo, cache => array( db => 0, session => 1 ) ) ); |
629 |
$this->set_handler( $proxy ); |
630 |
//$result = $resultHandle->getAttributes(); |
631 |
//return $result; |
632 |
//$this->_result = $resultHandle->getAttributes(); |
633 |
//$this->_result = $this->_handler->getAttributes(); |
634 |
// -------------------- clone this & modify ---------- |
635 |
*/ |
636 |
|
637 |
} |
638 |
|
639 |
|
640 |
function datasource_handler_buildoptions() { |
641 |
|
642 |
//print Dumper($this->_query); |
643 |
//exit; |
644 |
|
645 |
// make up a command from metadata |
646 |
// FIXME: abstract this some more (e.g. via a CommandMapper|Registry) |
647 |
switch ($this->_query[metatype]) { |
648 |
case 'data': |
649 |
//$command = 'queryData'; |
650 |
$command = 'getObjects'; // FIXME!!! |
651 |
//$this->_locator->set_option('metadata.command', $command); |
652 |
$args = array(); |
653 |
switch ($this->_query[vartype]) { |
654 |
case 'object': |
655 |
if (!$this->_query[classname]) { |
656 |
$msg = "_query[vartype] == 'object' requires _query[classname]"; |
657 |
user_error("GenericDataSource::query_data() - failed: " . $msg); |
658 |
} |
659 |
array_push($args, $this->_query[classname]); |
660 |
break; |
661 |
} |
662 |
break; |
663 |
case 'schema': |
664 |
$command = 'querySchema'; |
665 |
break; |
666 |
} |
667 |
|
668 |
|
669 |
/* |
670 |
$this->_query[rpc_command] = $command; |
671 |
$this->_query[rpc_args] = $command; |
672 |
*/ |
673 |
|
674 |
// methods!!! |
675 |
$this->_locator->_call[_method] = $command; |
676 |
$this->_locator->_call[_arguments] = $args; |
677 |
|
678 |
//$adapter = $this->get_adapter(); |
679 |
|
680 |
// trace |
681 |
/* |
682 |
print Dumper(null, '<b>= = = = = = = = = = = = = = = = = = = = = =</b>'); |
683 |
print Dumper('datasource_handler_buildoptions', array( |
684 |
"_locator" => $this->_locator, |
685 |
"_query" => $this->_query, |
686 |
"command" => '<b>' . $command . "</b>", |
687 |
"args" => $args |
688 |
)); |
689 |
*/ |
690 |
|
691 |
/* |
692 |
$this->_handler_options = array( |
693 |
method => $command, |
694 |
args => $args, |
695 |
); |
696 |
*/ |
697 |
|
698 |
} |
699 |
|
700 |
function &fetch_result() { |
701 |
|
702 |
$this->datasource_handler_buildoptions(); |
703 |
|
704 |
$method = $this->_locator->_call[_method]; |
705 |
$args = $this->_locator->_call[_arguments]; |
706 |
|
707 |
// pre-flight checks |
708 |
if (!$method) { |
709 |
$msg = "Remote command could not be resolved, please pass in or check configuration."; |
710 |
user_error("GenericDataSource::query_data() - failed: " . $msg); |
711 |
return; |
712 |
} |
713 |
|
714 |
//print "fetch_result: this->_handler=" . Dumper($this->_handler); |
715 |
|
716 |
// do remote call here and get result |
717 |
// FIXME: handle synchronous/asynchronous mode here!!! |
718 |
$this->datasource_handler_call($method, $args); |
719 |
|
720 |
|
721 |
// TODO: ... = $this->poll_handler_result and $this->get_handler_result |
722 |
$proxy = $this->get_proxy(); |
723 |
$this->_result = $proxy->getResult(); |
724 |
//print "result: " . Dumper($this->_result); exit; |
725 |
|
726 |
$this->_result_count = sizeof($this->_result); |
727 |
|
728 |
// trace |
729 |
if ($this->_debug[notice]) { |
730 |
//print "_result = " . Dumper($this->_result); |
731 |
print "DataSource::Generic->_result_count = " . $this->_result_count . "<br/>"; |
732 |
} |
733 |
|
734 |
return $this->_result; |
735 |
|
736 |
} |
737 |
|
738 |
|
739 |
function &query_data() { |
740 |
//print "query!<br/>"; |
741 |
return $this->fetch_result(); |
742 |
//$this->handle_result(); |
743 |
} |
744 |
|
745 |
function query_schema() { |
746 |
user_error("FIXME: query_schema"); |
747 |
// $this->datasource_handler_call( ... ); |
748 |
} |
749 |
|
750 |
function &get_result() { |
751 |
return $this->_result; |
752 |
} |
753 |
|
754 |
} |
755 |
|
756 |
?> |