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Annotation of Examples/EnterpriseObjects/SQLExecutor/SybaseDelegate.m, revision 1.1

1.1     ! root        1: /* SybaseDelegate.h:
        !             2:  * You may freely copy, distribute, and reuse the code in this example.
        !             3:  * NeXT disclaims any warranty of any kind, expressed or  implied, as to its
        !             4:  * fitness for any particular use.
        !             5:  *
        !             6:  * Written by Dan Willhite, EO Dev Team
        !             7:  * Modified by Mai Nguyen
        !             8:  *
        !             9:  */
        !            10: 
        !            11: #import "SybaseDelegate.h"
        !            12: #import "Evaluator.h"
        !            13: 
        !            14: /* A way to get a string out of an object */
        !            15: 
        !            16: @implementation SybaseDelegate
        !            17: - (NSArray *)sybaseChannel:(SybaseChannel *)channel
        !            18:     willFetchAttributes:(NSArray *)attributes
        !            19:     forRowOfType:(SybaseRowType)rowType
        !            20:     withComputeRowId:(int)computeRowId
        !            21: {
        !            22:        currentRowType = rowType;
        !            23:        
        !            24:     if (rowType == SybaseRegularRow)
        !            25:        return attributes;
        !            26:        
        !            27:     attributes = [(EOAdaptorChannel *) channel describeResults];
        !            28:     return attributes;
        !            29: }
        !            30: 
        !            31: /* Return YES will return all row types: regular, compute, etc.
        !            32:  * If one only wants specific rows to be returned, one can selectively
        !            33:  * return YES on those row types and NO on all others.
        !            34:  */
        !            35: - (BOOL)sybaseChannel:(SybaseChannel *)channel
        !            36:     willReturnRow:(NSDictionary *)row ofType:(SybaseRowType)rowType 
        !            37:     withComputeRowId:(int)computeRowId
        !            38: {
        !            39:        currentRowType = rowType;
        !            40:        
        !            41:     switch (rowType) {
        !            42:        case SybaseRegularRow:
        !            43:            break;
        !            44:        case SybaseComputeRow:
        !            45:                [[[NXApp mainWindow] delegate] logString:@"Returning compute row\n"];
        !            46:            break;
        !            47:        case SybaseReturnParameterRow:
        !            48:                [[[NXApp mainWindow] delegate] logString:
        !            49:                                                        @"Returning return parameter row\n"];
        !            50:            break;
        !            51:        case SybaseReturnStatusRow:
        !            52:                [[[NXApp mainWindow] delegate] logString:
        !            53:                                                        @"Returning return status row\n"];
        !            54:            break;
        !            55:     }
        !            56:     
        !            57:     return YES;
        !            58: }
        !            59: 
        !            60: - (SybaseRowType) currentRowType
        !            61: {
        !            62:        return currentRowType;
        !            63: }
        !            64: 
        !            65: - (void)adaptorChannelDidChangeResultSet:channel
        !            66: {
        !            67:     // Invoked from -fetchAttributes:withZone: to tell the delegate that
        !            68:     // fetching will start for the next result set, when a select operation
        !            69:     // resulted in multiple result sets.  This method is invoked just after a
        !            70:     // -fetchAttributes:withZone: returns nil when there are still result sets
        !            71:     // left to fetch.
        !            72: 
        !            73:        [[[NXApp mainWindow] delegate] announce:channel selector:_cmd];
        !            74: }
        !            75: 
        !            76: 
        !            77: 
        !            78: - (void)adaptorChannel:channel
        !            79:     didEvaluateExpression:(NSString *)expression
        !            80: {
        !            81:     // Invoked from -evaluateExpression: to tell the delegate that a query
        !            82:     // language expression has been evaluated by the database server. The
        !            83:     // delegate may take whatever action it needs based on this information.
        !            84: 
        !            85:        [[[NXApp mainWindow] delegate] announce:channel 
        !            86:                selector:_cmd 
        !            87:                with:[NSArray arrayWithObject:expression]];
        !            88: }
        !            89: 
        !            90: 
        !            91: 
        !            92: @end
        !            93: 

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