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Palm OS Programming, 2nd Edition by Neil Rhodes, Julie McKeehan

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Generic Conduit Classes

There are eight classes that affect your use of Generic conduit. As might be expected, each has a different responsibility. Figure 16-1 shows the inheritance relationship.

Inheritance relationship of Generic conduit classes
Figure 16-1. Inheritance relationship of Generic conduit classes

Table 16-4 contains a quick look at each class, in the order we discuss them in this chapter.

Table 16-4. Generic conduit classes

Class

What it does

Use

CPalmRecord

Represents a record (including attributes, ID, category number, length, and a pointer to data).

As is

CPCategory

Represents a category on the handheld.

As is

CPCategoryMgr

Represents a set of categories.

As is

CPDbBaseMgr

Defines database methods for iterating, adding and deleting records, and so on.

Classes derived from

CHHMgr

Subclass of CPDbBaseMgr; implements those routines by using Sync Manager.

As is

CPcMgr

Subclass of CPDbBaseMgr; implements the CDbManager member functions for a file on the desktop.

Derive own class from

CPLogging

Reports errors to the sync log.

As is

CSynchronizer

Handles the sync logic and control flow.

Derive own class from

Now let’s examine each class in detail.

CPalmRecord

This represents a Palm record; it stores attributes, a unique ID, a category number, a record length, and a pointer to the raw record data. The CPalmRecord, just like a record on the handheld, has no concept of fields; to ...

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