Return to Owner.m CVS log

Up to [NeXTSTEP 3.3 examples] / Examples / EnterpriseObjects / Archiving / ArchivingNSObject

Annotation of Examples/EnterpriseObjects/Archiving/ArchivingNSObject/Owner.m, revision 1.1

1.1     ! root        1: /* Owner.m
        !             2:  *
        !             3:  * You may freely copy, distribute, and reuse the code in this example.
        !             4:  * NeXT disclaims any warranty of any kind, expressed or  implied, as to its
        !             5:  * fitness for any particular use.
        !             6:  *
        !             7:  * 
        !             8:  *
        !             9:  */
        !            10: 
        !            11: 
        !            12: #import <eointerface/eointerface.h>
        !            13: #import "Owner.h"
        !            14: #import "NSAuthor.h"
        !            15: 
        !            16: #define ARCHIVE_FILE @"NSObjectArchive"
        !            17: 
        !            18: @implementation Owner
        !            19: 
        !            20:  
        !            21: - appDidInit:sender
        !            22: {
        !            23:     EOAdaptorChannel   *adaptorChannel;
        !            24:     
        !            25:     // Set up the adaptor channel for debugging
        !            26:     adaptorChannel = [[dataSource databaseChannel] adaptorChannel]; 
        !            27:     [(EOAdaptorChannel *)adaptorChannel setDelegate: self];
        !            28:     return self;
        !            29: }
        !            30: 
        !            31:     
        !            32: - (void)adaptorChannel:channel didEvaluateExpression:(NSString *)expression
        !            33: {
        !            34:     NSLog (expression);
        !            35: }
        !            36: 
        !            37: 
        !            38: - writeObject:sender
        !            39: {
        !            40:     eoArray = [controller selectedObjects];
        !            41:     // Archive the first object in the array of selected objects.
        !            42:     //  In this example, only one object is selected at a time.
        !            43:        if ([eoArray count] == 0) {
        !            44:                NXRunAlertPanel(NULL, "No object to archive!", NULL, NULL, NULL);
        !            45:                return self;
        !            46:                }
        !            47:     eoAuthor = [eoArray objectAtIndex:0];
        !            48:     
        !            49:     [self archiveThisNSObject:eoAuthor]; 
        !            50:     
        !            51:     return self;
        !            52: }
        !            53: 
        !            54: - readObject:sender
        !            55: {
        !            56:     eoAuthor = (NSAuthor *)[self unarchiveNSObject];
        !            57:     return self;
        !            58: }
        !            59: 
        !            60: 
        !            61: - (BOOL) archiveThisNSObject:(NSObject *)nsobject
        !            62: {
        !            63:     BOOL       b;
        !            64:     NSString *archivePath;
        !            65:     
        !            66:     if (!nsobject)
        !            67:        return NO;
        !            68:     
        !            69:        
        !            70:     archivePath = [NSString stringWithFormat:@"%@/%@", [self applicationPath], ARCHIVE_FILE];
        !            71:     b = [NSArchiver archiveRootObject:nsobject toFile:archivePath];
        !            72:     if (b == YES)
        !            73:        [textObject appendText:"NSObject archiving succeeded\n"];
        !            74:     else
        !            75:        [textObject appendText:"NSObject archiving failed\n"];
        !            76:        
        !            77:     return b;
        !            78: }
        !            79: 
        !            80: - (NSObject *) unarchiveNSObject 
        !            81: {
        !            82:     NSObject *nsobject;
        !            83:     char       buf[1024];
        !            84:     NSString *archivePath;
        !            85:        
        !            86:     archivePath = [NSString stringWithFormat:@"%@/%@", [self applicationPath], ARCHIVE_FILE];
        !            87: 
        !            88:     nsobject = [NSUnarchiver unarchiveObjectWithFile:archivePath];
        !            89:     if (nsobject) {
        !            90:        [textObject appendText:"NSObject unarchiving succeeded\n"];
        !            91:        sprintf(buf, "%s\n",[[(NSAuthor *)nsobject description] cString]);
        !            92:        [textObject appendText: "Author contents:"];
        !            93:        [textObject appendText:buf];
        !            94:     }
        !            95:     else
        !            96:        [textObject appendText:"NSObject unarchiving failed\n"];
        !            97: 
        !            98:     return nsobject;
        !            99: }
        !           100: 
        !           101: - (NSString *)applicationPath 
        !           102: {
        !           103:     int           i;
        !           104:     NSString   *appPathName = nil;
        !           105: 
        !           106:     for (i = strlen(NXArgv[0]) - 1; (i >= 0) && (NXArgv[0][i] != '/'); i--);
        !           107:     appPathName = [NSString stringWithCString:NXArgv[0] length:i];
        !           108:     if (NXArgv[0][0] != '/') {
        !           109:        char path[MAXPATHLEN+1];
        !           110:        appPathName = [NSString stringWithFormat:@"%s/%@", getwd(path), appPathName];
        !           111:     }
        !           112:     return appPathName;
        !           113: }
        !           114: 
        !           115: 
        !           116: @end
        !           117: 
        !           118: 
        !           119: @implementation Text(printResults)
        !           120: 
        !           121: - appendText:(const char *)newText
        !           122: {
        !           123:     int currentLength = [self textLength];
        !           124: 
        !           125:     [self setSel:currentLength :currentLength];
        !           126:     [self replaceSel:newText];
        !           127:     [self scrollSelToVisible];
        !           128:     return self;
        !           129: }
        !           130: 
        !           131: @end

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.