Source for file FieldValueSearch.class.php

<?php
 
require_once HARMONI."dataManager/search/SearchCriteria.interface.php";
 
/**
 * Searches for only {@link Record}s that contain a certain field=value pair.
 *
 * @package harmoni.datamanager.search
 * 
 * @copyright Copyright &copy; 2005, Middlebury College
 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License (GPL)
 *
 * @version $Id: FieldValueSearch.class.php,v 1.13 2007/09/04 20:25:32 adamfranco Exp $
 */
class FieldValueSearch extends SearchCriteria {
    
    var $_schemaID;
    var $_label;
    var $_value;
    var $_comparison;
    
    /**
     * The constructor.
     * @param string $schemaID The ID that references the {@link Schema} to apply this search to.
     * @param string $label The specific field within that {@link Schema} to check.
     * @param ref object $value An {@link SObject} object which holds the value to search for.
     * @param optional int $comparisonType The comparison type to use (equals, contains, less than, etc.) See the SEARCH_TYPE_* constants. Defaults to SEARCH_TYPE_EQUALS
     * @return void 
     */
    function FieldValueSearch( $schemaID, $label, $value, $comparisonType=SEARCH_TYPE_EQUALS) {
        $this->_schemaID =$schemaID;
        $this->_label = $label;
        $this->_value =$value;
        $this->_comparison = $comparisonType;
    }
    
    function returnSearchString() {
        $mgr = Services::getService("SchemaManager");
        $typeMgr = Services::getService("DataTypeManager");
        
        $def =$mgr->getSchemaByID($this->_schemaID);
        $def->load();
        
        $fieldID = $def->getFieldIDFromLabel($this->_label);
        
        $field =$def->getField($fieldID);
        
        
        // first check if the $value we have is of the correct data type
        $extendsRule = ExtendsValidatorRule::getRule("HarmoniIterator");
        if (!$typeMgr->isObjectOfDataType($this->_value, $field->getType()) 
            && !$extendsRule->check($this->_value)) 
        {
            throwError( new Error("Cannot take a '".get_class($this->_value)."' object as search criteria
            for field '$this->_label'; a '".$field->getType()."' is required.","FieldValueSearch",true));
        }
        
        $class = $typeMgr->storablePrimitiveClassForType($field->getType());
        eval('$string = '.$class.'::makeSearchString($this->_value, $this->_comparison);');
        
        return "(dm_record_field.fk_schema_field='".addslashes($fieldID)."' AND ".$string." AND dm_record_field.active=1)";
    }
 
    function postProcess($ids) { return $ids; }
    
}
 
?>